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llvm/clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
Nathan James a156a0e28d [ASTMatchers] Add hasPlacementArg and hasAnyPlacementArg traversal matcher for CXXNewExpr 
Summary: Adds new traversal matchers called `hasPlacementArg` and `hasAnyPlacementArg` that matches on arguments to `placement new` operators.

Reviewers: aaron.ballman

Reviewed By: aaron.ballman

Subscribers: merge_guards_bot, mehdi_amini, hiraditya, steven_wu, dexonsmith, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D73562
2020-01-30 10:16:04 +00:00

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//= unittests/ASTMatchers/ASTMatchersTraversalTest.cpp - matchers unit tests =//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ASTMatchersTest.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Host.h"
#include "gtest/gtest.h"
namespace clang {
namespace ast_matchers {
TEST(DeclarationMatcher, hasMethod) {
EXPECT_TRUE(matches("class A { void func(); };",
cxxRecordDecl(hasMethod(hasName("func")))));
EXPECT_TRUE(notMatches("class A { void func(); };",
cxxRecordDecl(hasMethod(isPublic()))));
}
TEST(DeclarationMatcher, ClassDerivedFromDependentTemplateSpecialization) {
EXPECT_TRUE(matches(
"template <typename T> struct A {"
" template <typename T2> struct F {};"
"};"
"template <typename T> struct B : A<T>::template F<T> {};"
"B<int> b;",
cxxRecordDecl(hasName("B"), isDerivedFrom(recordDecl()))));
}
TEST(DeclarationMatcher, hasDeclContext) {
EXPECT_TRUE(matches(
"namespace N {"
" namespace M {"
" class D {};"
" }"
"}",
recordDecl(hasDeclContext(namespaceDecl(hasName("M"))))));
EXPECT_TRUE(notMatches(
"namespace N {"
" namespace M {"
" class D {};"
" }"
"}",
recordDecl(hasDeclContext(namespaceDecl(hasName("N"))))));
EXPECT_TRUE(matches("namespace {"
" namespace M {"
" class D {};"
" }"
"}",
recordDecl(hasDeclContext(namespaceDecl(
hasName("M"), hasDeclContext(namespaceDecl()))))));
EXPECT_TRUE(matches("class D{};", decl(hasDeclContext(decl()))));
}
TEST(HasDescendant, MatchesDescendantTypes) {
EXPECT_TRUE(matches("void f() { int i = 3; }",
decl(hasDescendant(loc(builtinType())))));
EXPECT_TRUE(matches("void f() { int i = 3; }",
stmt(hasDescendant(builtinType()))));
EXPECT_TRUE(matches("void f() { int i = 3; }",
stmt(hasDescendant(loc(builtinType())))));
EXPECT_TRUE(matches("void f() { int i = 3; }",
stmt(hasDescendant(qualType(builtinType())))));
EXPECT_TRUE(notMatches("void f() { float f = 2.0f; }",
stmt(hasDescendant(isInteger()))));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f() { int a; float c; int d; int e; }",
functionDecl(forEachDescendant(
varDecl(hasDescendant(isInteger())).bind("x"))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 3)));
}
TEST(HasDescendant, MatchesDescendantsOfTypes) {
EXPECT_TRUE(matches("void f() { int*** i; }",
qualType(hasDescendant(builtinType()))));
EXPECT_TRUE(matches("void f() { int*** i; }",
qualType(hasDescendant(
pointerType(pointee(builtinType()))))));
EXPECT_TRUE(matches("void f() { int*** i; }",
typeLoc(hasDescendant(loc(builtinType())))));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f() { int*** i; }",
qualType(asString("int ***"), forEachDescendant(pointerType().bind("x"))),
std::make_unique<VerifyIdIsBoundTo<Type>>("x", 2)));
}
TEST(Has, MatchesChildrenOfTypes) {
EXPECT_TRUE(matches("int i;",
varDecl(hasName("i"), has(isInteger()))));
EXPECT_TRUE(notMatches("int** i;",
varDecl(hasName("i"), has(isInteger()))));
EXPECT_TRUE(matchAndVerifyResultTrue(
"int (*f)(float, int);",
qualType(functionType(), forEach(qualType(isInteger()).bind("x"))),
std::make_unique<VerifyIdIsBoundTo<QualType>>("x", 2)));
}
TEST(Has, MatchesChildTypes) {
EXPECT_TRUE(matches(
"int* i;",
varDecl(hasName("i"), hasType(qualType(has(builtinType()))))));
EXPECT_TRUE(notMatches(
"int* i;",
varDecl(hasName("i"), hasType(qualType(has(pointerType()))))));
}
TEST(StatementMatcher, Has) {
StatementMatcher HasVariableI =
expr(hasType(pointsTo(recordDecl(hasName("X")))),
has(ignoringParenImpCasts(declRefExpr(to(varDecl(hasName("i")))))));
EXPECT_TRUE(matches(
"class X; X *x(int); void c() { int i; x(i); }", HasVariableI));
EXPECT_TRUE(notMatches(
"class X; X *x(int); void c() { int i; x(42); }", HasVariableI));
}
TEST(StatementMatcher, HasDescendant) {
StatementMatcher HasDescendantVariableI =
expr(hasType(pointsTo(recordDecl(hasName("X")))),
hasDescendant(declRefExpr(to(varDecl(hasName("i"))))));
EXPECT_TRUE(matches(
"class X; X *x(bool); bool b(int); void c() { int i; x(b(i)); }",
HasDescendantVariableI));
EXPECT_TRUE(notMatches(
"class X; X *x(bool); bool b(int); void c() { int i; x(b(42)); }",
HasDescendantVariableI));
}
TEST(TypeMatcher, MatchesClassType) {
TypeMatcher TypeA = hasDeclaration(recordDecl(hasName("A")));
EXPECT_TRUE(matches("class A { public: A *a; };", TypeA));
EXPECT_TRUE(notMatches("class A {};", TypeA));
TypeMatcher TypeDerivedFromA =
hasDeclaration(cxxRecordDecl(isDerivedFrom("A")));
EXPECT_TRUE(matches("class A {}; class B : public A { public: B *b; };",
TypeDerivedFromA));
EXPECT_TRUE(notMatches("class A {};", TypeA));
TypeMatcher TypeAHasClassB = hasDeclaration(
recordDecl(hasName("A"), has(recordDecl(hasName("B")))));
EXPECT_TRUE(
matches("class A { public: A *a; class B {}; };", TypeAHasClassB));
EXPECT_TRUE(matchesC("struct S {}; void f(void) { struct S s; }",
varDecl(hasType(namedDecl(hasName("S"))))));
}
TEST(TypeMatcher, MatchesDeclTypes) {
// TypedefType -> TypedefNameDecl
EXPECT_TRUE(matches("typedef int I; void f(I i);",
parmVarDecl(hasType(namedDecl(hasName("I"))))));
// ObjCObjectPointerType
EXPECT_TRUE(matchesObjC("@interface Foo @end void f(Foo *f);",
parmVarDecl(hasType(objcObjectPointerType()))));
// ObjCObjectPointerType -> ObjCInterfaceType -> ObjCInterfaceDecl
EXPECT_TRUE(matchesObjC(
"@interface Foo @end void f(Foo *f);",
parmVarDecl(hasType(pointsTo(objcInterfaceDecl(hasName("Foo")))))));
// TemplateTypeParmType
EXPECT_TRUE(matches("template <typename T> void f(T t);",
parmVarDecl(hasType(templateTypeParmType()))));
// TemplateTypeParmType -> TemplateTypeParmDecl
EXPECT_TRUE(matches("template <typename T> void f(T t);",
parmVarDecl(hasType(namedDecl(hasName("T"))))));
// InjectedClassNameType
EXPECT_TRUE(matches("template <typename T> struct S {"
" void f(S s);"
"};",
parmVarDecl(hasType(injectedClassNameType()))));
EXPECT_TRUE(notMatches("template <typename T> struct S {"
" void g(S<T> s);"
"};",
parmVarDecl(hasType(injectedClassNameType()))));
// InjectedClassNameType -> CXXRecordDecl
EXPECT_TRUE(matches("template <typename T> struct S {"
" void f(S s);"
"};",
parmVarDecl(hasType(namedDecl(hasName("S"))))));
static const char Using[] = "template <typename T>"
"struct Base {"
" typedef T Foo;"
"};"
""
"template <typename T>"
"struct S : private Base<T> {"
" using typename Base<T>::Foo;"
" void f(Foo);"
"};";
// UnresolvedUsingTypenameDecl
EXPECT_TRUE(matches(Using, unresolvedUsingTypenameDecl(hasName("Foo"))));
// UnresolvedUsingTypenameType -> UnresolvedUsingTypenameDecl
EXPECT_TRUE(matches(Using, parmVarDecl(hasType(namedDecl(hasName("Foo"))))));
}
TEST(HasDeclaration, HasDeclarationOfEnumType) {
EXPECT_TRUE(matches("enum X {}; void y(X *x) { x; }",
expr(hasType(pointsTo(
qualType(hasDeclaration(enumDecl(hasName("X")))))))));
}
TEST(HasDeclaration, HasGetDeclTraitTest) {
static_assert(internal::has_getDecl<TypedefType>::value,
"Expected TypedefType to have a getDecl.");
static_assert(internal::has_getDecl<RecordType>::value,
"Expected RecordType to have a getDecl.");
static_assert(!internal::has_getDecl<TemplateSpecializationType>::value,
"Expected TemplateSpecializationType to *not* have a getDecl.");
}
TEST(HasDeclaration, ElaboratedType) {
EXPECT_TRUE(matches(
"namespace n { template <typename T> struct X {}; }"
"void f(n::X<int>);",
parmVarDecl(hasType(qualType(hasDeclaration(cxxRecordDecl()))))));
EXPECT_TRUE(matches(
"namespace n { template <typename T> struct X {}; }"
"void f(n::X<int>);",
parmVarDecl(hasType(elaboratedType(hasDeclaration(cxxRecordDecl()))))));
}
TEST(HasDeclaration, HasDeclarationOfTypeWithDecl) {
EXPECT_TRUE(matches("typedef int X; X a;",
varDecl(hasName("a"),
hasType(typedefType(hasDeclaration(decl()))))));
// FIXME: Add tests for other types with getDecl() (e.g. RecordType)
}
TEST(HasDeclaration, HasDeclarationOfTemplateSpecializationType) {
EXPECT_TRUE(matches("template <typename T> class A {}; A<int> a;",
varDecl(hasType(templateSpecializationType(
hasDeclaration(namedDecl(hasName("A"))))))));
EXPECT_TRUE(matches("template <typename T> class A {};"
"template <typename T> class B { A<T> a; };",
fieldDecl(hasType(templateSpecializationType(
hasDeclaration(namedDecl(hasName("A"))))))));
EXPECT_TRUE(matches("template <typename T> class A {}; A<int> a;",
varDecl(hasType(templateSpecializationType(
hasDeclaration(cxxRecordDecl()))))));
}
TEST(HasDeclaration, HasDeclarationOfCXXNewExpr) {
EXPECT_TRUE(
matches("int *A = new int();",
cxxNewExpr(hasDeclaration(functionDecl(parameterCountIs(1))))));
}
TEST(HasDeclaration, HasDeclarationOfTypeAlias) {
EXPECT_TRUE(matches("template <typename T> using C = T; C<int> c;",
varDecl(hasType(templateSpecializationType(
hasDeclaration(typeAliasTemplateDecl()))))));
}
TEST(HasUnqualifiedDesugaredType, DesugarsUsing) {
EXPECT_TRUE(
matches("struct A {}; using B = A; B b;",
varDecl(hasType(hasUnqualifiedDesugaredType(recordType())))));
EXPECT_TRUE(
matches("struct A {}; using B = A; using C = B; C b;",
varDecl(hasType(hasUnqualifiedDesugaredType(recordType())))));
}
TEST(HasUnderlyingDecl, Matches) {
EXPECT_TRUE(matches("namespace N { template <class T> void f(T t); }"
"template <class T> void g() { using N::f; f(T()); }",
unresolvedLookupExpr(hasAnyDeclaration(
namedDecl(hasUnderlyingDecl(hasName("::N::f")))))));
EXPECT_TRUE(matches(
"namespace N { template <class T> void f(T t); }"
"template <class T> void g() { N::f(T()); }",
unresolvedLookupExpr(hasAnyDeclaration(namedDecl(hasName("::N::f"))))));
EXPECT_TRUE(notMatches(
"namespace N { template <class T> void f(T t); }"
"template <class T> void g() { using N::f; f(T()); }",
unresolvedLookupExpr(hasAnyDeclaration(namedDecl(hasName("::N::f"))))));
}
TEST(HasType, TakesQualTypeMatcherAndMatchesExpr) {
TypeMatcher ClassX = hasDeclaration(recordDecl(hasName("X")));
EXPECT_TRUE(
matches("class X {}; void y(X &x) { x; }", expr(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y(X *x) { x; }",
expr(hasType(ClassX))));
EXPECT_TRUE(
matches("class X {}; void y(X *x) { x; }",
expr(hasType(pointsTo(ClassX)))));
}
TEST(HasType, TakesQualTypeMatcherAndMatchesValueDecl) {
TypeMatcher ClassX = hasDeclaration(recordDecl(hasName("X")));
EXPECT_TRUE(
matches("class X {}; void y() { X x; }", varDecl(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y() { X *x; }", varDecl(hasType(ClassX))));
EXPECT_TRUE(
matches("class X {}; void y() { X *x; }",
varDecl(hasType(pointsTo(ClassX)))));
}
TEST(HasType, TakesDeclMatcherAndMatchesExpr) {
DeclarationMatcher ClassX = recordDecl(hasName("X"));
EXPECT_TRUE(
matches("class X {}; void y(X &x) { x; }", expr(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y(X *x) { x; }",
expr(hasType(ClassX))));
}
TEST(HasType, TakesDeclMatcherAndMatchesValueDecl) {
DeclarationMatcher ClassX = recordDecl(hasName("X"));
EXPECT_TRUE(
matches("class X {}; void y() { X x; }", varDecl(hasType(ClassX))));
EXPECT_TRUE(
notMatches("class X {}; void y() { X *x; }", varDecl(hasType(ClassX))));
}
TEST(HasType, MatchesTypedefDecl) {
EXPECT_TRUE(matches("typedef int X;", typedefDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("typedef const int T;",
typedefDecl(hasType(asString("const int")))));
EXPECT_TRUE(notMatches("typedef const int T;",
typedefDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("typedef int foo; typedef foo bar;",
typedefDecl(hasType(asString("foo")), hasName("bar"))));
}
TEST(HasType, MatchesTypedefNameDecl) {
EXPECT_TRUE(matches("using X = int;", typedefNameDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("using T = const int;",
typedefNameDecl(hasType(asString("const int")))));
EXPECT_TRUE(notMatches("using T = const int;",
typedefNameDecl(hasType(asString("int")))));
EXPECT_TRUE(matches("using foo = int; using bar = foo;",
typedefNameDecl(hasType(asString("foo")), hasName("bar"))));
}
TEST(HasTypeLoc, MatchesDeclaratorDecls) {
EXPECT_TRUE(matches("int x;",
varDecl(hasName("x"), hasTypeLoc(loc(asString("int"))))));
// Make sure we don't crash on implicit constructors.
EXPECT_TRUE(notMatches("class X {}; X x;",
declaratorDecl(hasTypeLoc(loc(asString("int"))))));
}
TEST(Callee, MatchesDeclarations) {
StatementMatcher CallMethodX = callExpr(callee(cxxMethodDecl(hasName("x"))));
EXPECT_TRUE(matches("class Y { void x() { x(); } };", CallMethodX));
EXPECT_TRUE(notMatches("class Y { void x() {} };", CallMethodX));
CallMethodX = callExpr(callee(cxxConversionDecl()));
EXPECT_TRUE(
matches("struct Y { operator int() const; }; int i = Y();", CallMethodX));
EXPECT_TRUE(notMatches("struct Y { operator int() const; }; Y y = Y();",
CallMethodX));
}
TEST(Callee, MatchesMemberExpressions) {
EXPECT_TRUE(matches("class Y { void x() { this->x(); } };",
callExpr(callee(memberExpr()))));
EXPECT_TRUE(
notMatches("class Y { void x() { this->x(); } };", callExpr(callee(callExpr()))));
}
TEST(Matcher, Argument) {
StatementMatcher CallArgumentY = callExpr(
hasArgument(0, declRefExpr(to(varDecl(hasName("y"))))));
EXPECT_TRUE(matches("void x(int) { int y; x(y); }", CallArgumentY));
EXPECT_TRUE(
matches("class X { void x(int) { int y; x(y); } };", CallArgumentY));
EXPECT_TRUE(notMatches("void x(int) { int z; x(z); }", CallArgumentY));
StatementMatcher WrongIndex = callExpr(
hasArgument(42, declRefExpr(to(varDecl(hasName("y"))))));
EXPECT_TRUE(notMatches("void x(int) { int y; x(y); }", WrongIndex));
}
TEST(Matcher, AnyArgument) {
auto HasArgumentY = hasAnyArgument(
ignoringParenImpCasts(declRefExpr(to(varDecl(hasName("y"))))));
StatementMatcher CallArgumentY = callExpr(HasArgumentY);
StatementMatcher CtorArgumentY = cxxConstructExpr(HasArgumentY);
StatementMatcher UnresolvedCtorArgumentY =
cxxUnresolvedConstructExpr(HasArgumentY);
StatementMatcher ObjCCallArgumentY = objcMessageExpr(HasArgumentY);
EXPECT_TRUE(matches("void x(int, int) { int y; x(1, y); }", CallArgumentY));
EXPECT_TRUE(matches("void x(int, int) { int y; x(y, 42); }", CallArgumentY));
EXPECT_TRUE(matches("struct Y { Y(int, int); };"
"void x() { int y; (void)Y(1, y); }",
CtorArgumentY));
EXPECT_TRUE(matches("struct Y { Y(int, int); };"
"void x() { int y; (void)Y(y, 42); }",
CtorArgumentY));
EXPECT_TRUE(matches("template <class Y> void x() { int y; (void)Y(1, y); }",
UnresolvedCtorArgumentY));
EXPECT_TRUE(matches("template <class Y> void x() { int y; (void)Y(y, 42); }",
UnresolvedCtorArgumentY));
EXPECT_TRUE(matchesObjC("@interface I -(void)f:(int) y; @end "
"void x(I* i) { int y; [i f:y]; }",
ObjCCallArgumentY));
EXPECT_FALSE(matchesObjC("@interface I -(void)f:(int) z; @end "
"void x(I* i) { int z; [i f:z]; }",
ObjCCallArgumentY));
EXPECT_TRUE(notMatches("void x(int, int) { x(1, 2); }", CallArgumentY));
EXPECT_TRUE(notMatches("struct Y { Y(int, int); };"
"void x() { int y; (void)Y(1, 2); }",
CtorArgumentY));
EXPECT_TRUE(notMatches("template <class Y>"
"void x() { int y; (void)Y(1, 2); }",
UnresolvedCtorArgumentY));
StatementMatcher ImplicitCastedArgument = callExpr(
hasAnyArgument(implicitCastExpr()));
EXPECT_TRUE(matches("void x(long) { int y; x(y); }", ImplicitCastedArgument));
}
TEST(Matcher, HasReceiver) {
EXPECT_TRUE(matchesObjC(
"@interface NSString @end "
"void f(NSString *x) {"
"[x containsString];"
"}",
objcMessageExpr(hasReceiver(declRefExpr(to(varDecl(hasName("x"))))))));
EXPECT_FALSE(matchesObjC(
"@interface NSString +(NSString *) stringWithFormat; @end "
"void f() { [NSString stringWithFormat]; }",
objcMessageExpr(hasReceiver(declRefExpr(to(varDecl(hasName("x"))))))));
}
TEST(Matcher, HasAnyCapture) {
auto HasCaptureX = lambdaExpr(hasAnyCapture(varDecl(hasName("x"))));
EXPECT_TRUE(matches("void f() { int x = 3; [x](){}; }", HasCaptureX));
EXPECT_TRUE(matches("void f() { int x = 3; [&x](){}; }", HasCaptureX));
EXPECT_TRUE(notMatches("void f() { [](){}; }", HasCaptureX));
EXPECT_TRUE(notMatches("void f() { int z = 3; [&z](){}; }", HasCaptureX));
EXPECT_TRUE(
notMatches("struct a { void f() { [this](){}; }; };", HasCaptureX));
}
TEST(Matcher, CapturesThis) {
auto HasCaptureThis = lambdaExpr(hasAnyCapture(cxxThisExpr()));
EXPECT_TRUE(
matches("struct a { void f() { [this](){}; }; };", HasCaptureThis));
EXPECT_TRUE(notMatches("void f() { [](){}; }", HasCaptureThis));
EXPECT_TRUE(notMatches("void f() { int x = 3; [x](){}; }", HasCaptureThis));
EXPECT_TRUE(notMatches("void f() { int x = 3; [&x](){}; }", HasCaptureThis));
EXPECT_TRUE(notMatches("void f() { int z = 3; [&z](){}; }", HasCaptureThis));
}
TEST(Matcher, isClassMessage) {
EXPECT_TRUE(matchesObjC(
"@interface NSString +(NSString *) stringWithFormat; @end "
"void f() { [NSString stringWithFormat]; }",
objcMessageExpr(isClassMessage())));
EXPECT_FALSE(matchesObjC(
"@interface NSString @end "
"void f(NSString *x) {"
"[x containsString];"
"}",
objcMessageExpr(isClassMessage())));
}
TEST(Matcher, isInstanceMessage) {
EXPECT_TRUE(matchesObjC(
"@interface NSString @end "
"void f(NSString *x) {"
"[x containsString];"
"}",
objcMessageExpr(isInstanceMessage())));
EXPECT_FALSE(matchesObjC(
"@interface NSString +(NSString *) stringWithFormat; @end "
"void f() { [NSString stringWithFormat]; }",
objcMessageExpr(isInstanceMessage())));
}
TEST(Matcher, isClassMethod) {
EXPECT_TRUE(matchesObjC(
"@interface Bar + (void)bar; @end",
objcMethodDecl(isClassMethod())));
EXPECT_TRUE(matchesObjC(
"@interface Bar @end"
"@implementation Bar + (void)bar {} @end",
objcMethodDecl(isClassMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Foo - (void)foo; @end",
objcMethodDecl(isClassMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Foo @end "
"@implementation Foo - (void)foo {} @end",
objcMethodDecl(isClassMethod())));
}
TEST(Matcher, isInstanceMethod) {
EXPECT_TRUE(matchesObjC(
"@interface Foo - (void)foo; @end",
objcMethodDecl(isInstanceMethod())));
EXPECT_TRUE(matchesObjC(
"@interface Foo @end "
"@implementation Foo - (void)foo {} @end",
objcMethodDecl(isInstanceMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Bar + (void)bar; @end",
objcMethodDecl(isInstanceMethod())));
EXPECT_FALSE(matchesObjC(
"@interface Bar @end"
"@implementation Bar + (void)bar {} @end",
objcMethodDecl(isInstanceMethod())));
}
TEST(MatcherCXXMemberCallExpr, On) {
auto Snippet1 = R"cc(
struct Y {
void m();
};
void z(Y y) { y.m(); }
)cc";
auto Snippet2 = R"cc(
struct Y {
void m();
};
struct X : public Y {};
void z(X x) { x.m(); }
)cc";
auto MatchesY = cxxMemberCallExpr(on(hasType(cxxRecordDecl(hasName("Y")))));
EXPECT_TRUE(matches(Snippet1, MatchesY));
EXPECT_TRUE(notMatches(Snippet2, MatchesY));
auto MatchesX = cxxMemberCallExpr(on(hasType(cxxRecordDecl(hasName("X")))));
EXPECT_TRUE(matches(Snippet2, MatchesX));
// Parens are ignored.
auto Snippet3 = R"cc(
struct Y {
void m();
};
Y g();
void z(Y y) { (g()).m(); }
)cc";
auto MatchesCall = cxxMemberCallExpr(on(callExpr()));
EXPECT_TRUE(matches(Snippet3, MatchesCall));
}
TEST(MatcherCXXMemberCallExpr, OnImplicitObjectArgument) {
auto Snippet1 = R"cc(
struct Y {
void m();
};
void z(Y y) { y.m(); }
)cc";
auto Snippet2 = R"cc(
struct Y {
void m();
};
struct X : public Y {};
void z(X x) { x.m(); }
)cc";
auto MatchesY = cxxMemberCallExpr(
onImplicitObjectArgument(hasType(cxxRecordDecl(hasName("Y")))));
EXPECT_TRUE(matches(Snippet1, MatchesY));
EXPECT_TRUE(matches(Snippet2, MatchesY));
auto MatchesX = cxxMemberCallExpr(
onImplicitObjectArgument(hasType(cxxRecordDecl(hasName("X")))));
EXPECT_TRUE(notMatches(Snippet2, MatchesX));
// Parens are not ignored.
auto Snippet3 = R"cc(
struct Y {
void m();
};
Y g();
void z(Y y) { (g()).m(); }
)cc";
auto MatchesCall = cxxMemberCallExpr(onImplicitObjectArgument(callExpr()));
EXPECT_TRUE(notMatches(Snippet3, MatchesCall));
}
TEST(Matcher, HasObjectExpr) {
auto Snippet1 = R"cc(
struct X {
int m;
int f(X x) { return x.m; }
};
)cc";
auto Snippet2 = R"cc(
struct X {
int m;
int f(X x) { return m; }
};
)cc";
auto MatchesX =
memberExpr(hasObjectExpression(hasType(cxxRecordDecl(hasName("X")))));
EXPECT_TRUE(matches(Snippet1, MatchesX));
EXPECT_TRUE(notMatches(Snippet2, MatchesX));
auto MatchesXPointer = memberExpr(
hasObjectExpression(hasType(pointsTo(cxxRecordDecl(hasName("X"))))));
EXPECT_TRUE(notMatches(Snippet1, MatchesXPointer));
EXPECT_TRUE(matches(Snippet2, MatchesXPointer));
}
TEST(ForEachArgumentWithParam, ReportsNoFalsePositives) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher CallExpr =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
// IntParam does not match.
EXPECT_TRUE(notMatches("void f(int* i) { int* y; f(y); }", CallExpr));
// ArgumentY does not match.
EXPECT_TRUE(notMatches("void f(int i) { int x; f(x); }", CallExpr));
}
TEST(ForEachArgumentWithParam, MatchesCXXMemberCallExpr) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher CallExpr =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(matchAndVerifyResultTrue(
"struct S {"
" const S& operator[](int i) { return *this; }"
"};"
"void f(S S1) {"
" int y = 1;"
" S1[y];"
"}",
CallExpr, std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param", 1)));
StatementMatcher CallExpr2 =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(matchAndVerifyResultTrue(
"struct S {"
" static void g(int i);"
"};"
"void f() {"
" int y = 1;"
" S::g(y);"
"}",
CallExpr2, std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param", 1)));
}
TEST(ForEachArgumentWithParam, MatchesCallExpr) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher CallExpr =
callExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(
matchAndVerifyResultTrue("void f(int i) { int y; f(y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>(
"param")));
EXPECT_TRUE(
matchAndVerifyResultTrue("void f(int i) { int y; f(y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<DeclRefExpr>>(
"arg")));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f(int i, int j) { int y; f(y, y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param", 2)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f(int i, int j) { int y; f(y, y); }", CallExpr,
std::make_unique<VerifyIdIsBoundTo<DeclRefExpr>>("arg", 2)));
}
TEST(ForEachArgumentWithParam, MatchesConstructExpr) {
StatementMatcher ArgumentY =
declRefExpr(to(varDecl(hasName("y")))).bind("arg");
DeclarationMatcher IntParam = parmVarDecl(hasType(isInteger())).bind("param");
StatementMatcher ConstructExpr =
cxxConstructExpr(forEachArgumentWithParam(ArgumentY, IntParam));
EXPECT_TRUE(matchAndVerifyResultTrue(
"struct C {"
" C(int i) {}"
"};"
"int y = 0;"
"C Obj(y);",
ConstructExpr,
std::make_unique<VerifyIdIsBoundTo<ParmVarDecl>>("param")));
}
TEST(ForEachArgumentWithParam, HandlesBoundNodesForNonMatches) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"void g(int i, int j) {"
" int a;"
" int b;"
" int c;"
" g(a, 0);"
" g(a, b);"
" g(0, b);"
"}",
functionDecl(
forEachDescendant(varDecl().bind("v")),
forEachDescendant(callExpr(forEachArgumentWithParam(
declRefExpr(to(decl(equalsBoundNode("v")))), parmVarDecl())))),
std::make_unique<VerifyIdIsBoundTo<VarDecl>>("v", 4)));
}
TEST(QualType, hasCanonicalType) {
EXPECT_TRUE(notMatches("typedef int &int_ref;"
"int a;"
"int_ref b = a;",
varDecl(hasType(qualType(referenceType())))));
EXPECT_TRUE(
matches("typedef int &int_ref;"
"int a;"
"int_ref b = a;",
varDecl(hasType(qualType(hasCanonicalType(referenceType()))))));
}
TEST(HasParameter, CallsInnerMatcher) {
EXPECT_TRUE(matches("class X { void x(int) {} };",
cxxMethodDecl(hasParameter(0, varDecl()))));
EXPECT_TRUE(notMatches("class X { void x(int) {} };",
cxxMethodDecl(hasParameter(0, hasName("x")))));
EXPECT_TRUE(matchesObjC("@interface I -(void)f:(int) x; @end",
objcMethodDecl(hasParameter(0, hasName("x")))));
EXPECT_TRUE(matchesObjC("int main() { void (^b)(int) = ^(int p) {}; }",
blockDecl(hasParameter(0, hasName("p")))));
}
TEST(HasParameter, DoesNotMatchIfIndexOutOfBounds) {
EXPECT_TRUE(notMatches("class X { void x(int) {} };",
cxxMethodDecl(hasParameter(42, varDecl()))));
}
TEST(HasType, MatchesParameterVariableTypesStrictly) {
EXPECT_TRUE(matches(
"class X { void x(X x) {} };",
cxxMethodDecl(hasParameter(0, hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(notMatches(
"class X { void x(const X &x) {} };",
cxxMethodDecl(hasParameter(0, hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(matches("class X { void x(const X *x) {} };",
cxxMethodDecl(hasParameter(
0, hasType(pointsTo(recordDecl(hasName("X"))))))));
EXPECT_TRUE(matches("class X { void x(const X &x) {} };",
cxxMethodDecl(hasParameter(
0, hasType(references(recordDecl(hasName("X"))))))));
}
TEST(HasAnyParameter, MatchesIndependentlyOfPosition) {
EXPECT_TRUE(matches(
"class Y {}; class X { void x(X x, Y y) {} };",
cxxMethodDecl(hasAnyParameter(hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(matches(
"class Y {}; class X { void x(Y y, X x) {} };",
cxxMethodDecl(hasAnyParameter(hasType(recordDecl(hasName("X")))))));
EXPECT_TRUE(matchesObjC("@interface I -(void)f:(int) x; @end",
objcMethodDecl(hasAnyParameter(hasName("x")))));
EXPECT_TRUE(matchesObjC("int main() { void (^b)(int) = ^(int p) {}; }",
blockDecl(hasAnyParameter(hasName("p")))));
}
TEST(Returns, MatchesReturnTypes) {
EXPECT_TRUE(matches("class Y { int f() { return 1; } };",
functionDecl(returns(asString("int")))));
EXPECT_TRUE(notMatches("class Y { int f() { return 1; } };",
functionDecl(returns(asString("float")))));
EXPECT_TRUE(matches("class Y { Y getMe() { return *this; } };",
functionDecl(returns(hasDeclaration(
recordDecl(hasName("Y")))))));
}
TEST(HasAnyParameter, DoesntMatchIfInnerMatcherDoesntMatch) {
EXPECT_TRUE(notMatches(
"class Y {}; class X { void x(int) {} };",
cxxMethodDecl(hasAnyParameter(hasType(recordDecl(hasName("X")))))));
}
TEST(HasAnyParameter, DoesNotMatchThisPointer) {
EXPECT_TRUE(notMatches("class Y {}; class X { void x() {} };",
cxxMethodDecl(hasAnyParameter(
hasType(pointsTo(recordDecl(hasName("X"))))))));
}
TEST(HasName, MatchesParameterVariableDeclarations) {
EXPECT_TRUE(matches("class Y {}; class X { void x(int x) {} };",
cxxMethodDecl(hasAnyParameter(hasName("x")))));
EXPECT_TRUE(notMatches("class Y {}; class X { void x(int) {} };",
cxxMethodDecl(hasAnyParameter(hasName("x")))));
}
TEST(Matcher, MatchesTypeTemplateArgument) {
EXPECT_TRUE(matches(
"template<typename T> struct B {};"
"B<int> b;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(refersToType(
asString("int"))))));
}
TEST(Matcher, MatchesTemplateTemplateArgument) {
EXPECT_TRUE(matches("template<template <typename> class S> class X {};"
"template<typename T> class Y {};"
"X<Y> xi;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToTemplate(templateName())))));
}
TEST(Matcher, MatchesDeclarationReferenceTemplateArgument) {
EXPECT_TRUE(matches(
"struct B { int next; };"
"template<int(B::*next_ptr)> struct A {};"
"A<&B::next> a;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToDeclaration(fieldDecl(hasName("next")))))));
EXPECT_TRUE(notMatches(
"template <typename T> struct A {};"
"A<int> a;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToDeclaration(decl())))));
EXPECT_TRUE(matches(
"struct B { int next; };"
"template<int(B::*next_ptr)> struct A {};"
"A<&B::next> a;",
templateSpecializationType(hasAnyTemplateArgument(isExpr(
hasDescendant(declRefExpr(to(fieldDecl(hasName("next"))))))))));
EXPECT_TRUE(notMatches(
"template <typename T> struct A {};"
"A<int> a;",
templateSpecializationType(hasAnyTemplateArgument(
refersToDeclaration(decl())))));
}
TEST(Matcher, MatchesSpecificArgument) {
EXPECT_TRUE(matches(
"template<typename T, typename U> class A {};"
"A<bool, int> a;",
classTemplateSpecializationDecl(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(notMatches(
"template<typename T, typename U> class A {};"
"A<int, bool> a;",
classTemplateSpecializationDecl(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(matches(
"template<typename T, typename U> class A {};"
"A<bool, int> a;",
templateSpecializationType(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(notMatches(
"template<typename T, typename U> class A {};"
"A<int, bool> a;",
templateSpecializationType(hasTemplateArgument(
1, refersToType(asString("int"))))));
EXPECT_TRUE(matches(
"template<typename T> void f() {};"
"void func() { f<int>(); }",
functionDecl(hasTemplateArgument(0, refersToType(asString("int"))))));
EXPECT_TRUE(notMatches(
"template<typename T> void f() {};",
functionDecl(hasTemplateArgument(0, refersToType(asString("int"))))));
}
TEST(TemplateArgument, Matches) {
EXPECT_TRUE(matches("template<typename T> struct C {}; C<int> c;",
classTemplateSpecializationDecl(
hasAnyTemplateArgument(templateArgument()))));
EXPECT_TRUE(matches(
"template<typename T> struct C {}; C<int> c;",
templateSpecializationType(hasAnyTemplateArgument(templateArgument()))));
EXPECT_TRUE(matches(
"template<typename T> void f() {};"
"void func() { f<int>(); }",
functionDecl(hasAnyTemplateArgument(templateArgument()))));
}
TEST(TemplateTypeParmDecl, CXXMethodDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" void method();\n"
"};\n"
"template<typename U>\n"
"void Class<U>::method() {}\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(TemplateTypeParmDecl, VarDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" static T pi;\n"
"};\n"
"template<typename U>\n"
"U Class<U>::pi = U(3.1415926535897932385);\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(TemplateTypeParmDecl, VarTemplatePartialSpecializationDecl) {
const char input[] =
"template<typename T>\n"
"struct Struct {\n"
" template<typename T2> static int field;\n"
"};\n"
"template<typename U>\n"
"template<typename U2>\n"
"int Struct<U>::field<U2*> = 123;\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T2"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U2"))));
}
TEST(TemplateTypeParmDecl, ClassTemplatePartialSpecializationDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" template<typename T2> struct Struct;\n"
"};\n"
"template<typename U>\n"
"template<typename U2>\n"
"struct Class<U>::Struct<U2*> {};\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T2"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U2"))));
}
TEST(TemplateTypeParmDecl, EnumDecl) {
const char input[] =
"template<typename T>\n"
"struct Struct {\n"
" enum class Enum : T;\n"
"};\n"
"template<typename U>\n"
"enum class Struct<U>::Enum : U {\n"
" e1,\n"
" e2\n"
"};\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(TemplateTypeParmDecl, RecordDecl) {
const char input[] =
"template<typename T>\n"
"class Class {\n"
" struct Struct;\n"
"};\n"
"template<typename U>\n"
"struct Class<U>::Struct {\n"
" U field;\n"
"};\n";
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(matches(input, templateTypeParmDecl(hasName("U"))));
}
TEST(RefersToIntegralType, Matches) {
EXPECT_TRUE(matches("template<int T> struct C {}; C<42> c;",
classTemplateSpecializationDecl(
hasAnyTemplateArgument(refersToIntegralType(
asString("int"))))));
EXPECT_TRUE(notMatches("template<unsigned T> struct C {}; C<42> c;",
classTemplateSpecializationDecl(hasAnyTemplateArgument(
refersToIntegralType(asString("int"))))));
}
TEST(ConstructorDeclaration, SimpleCase) {
EXPECT_TRUE(matches("class Foo { Foo(int i); };",
cxxConstructorDecl(ofClass(hasName("Foo")))));
EXPECT_TRUE(notMatches("class Foo { Foo(int i); };",
cxxConstructorDecl(ofClass(hasName("Bar")))));
}
TEST(DestructorDeclaration, MatchesVirtualDestructor) {
EXPECT_TRUE(matches("class Foo { virtual ~Foo(); };",
cxxDestructorDecl(ofClass(hasName("Foo")))));
}
TEST(DestructorDeclaration, DoesNotMatchImplicitDestructor) {
EXPECT_TRUE(notMatches("class Foo {};",
cxxDestructorDecl(ofClass(hasName("Foo")))));
}
TEST(HasAnyConstructorInitializer, SimpleCase) {
EXPECT_TRUE(
notMatches("class Foo { Foo() { } };",
cxxConstructorDecl(hasAnyConstructorInitializer(anything()))));
EXPECT_TRUE(
matches("class Foo {"
" Foo() : foo_() { }"
" int foo_;"
"};",
cxxConstructorDecl(hasAnyConstructorInitializer(anything()))));
}
TEST(HasAnyConstructorInitializer, ForField) {
static const char Code[] =
"class Baz { };"
"class Foo {"
" Foo() : foo_(), bar_() { }"
" Baz foo_;"
" struct {"
" Baz bar_;"
" };"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasType(recordDecl(hasName("Baz"))))))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasName("foo_"))))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasName("bar_"))))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
forField(hasType(recordDecl(hasName("Bar"))))))));
}
TEST(HasAnyConstructorInitializer, WithInitializer) {
static const char Code[] =
"class Foo {"
" Foo() : foo_(0) { }"
" int foo_;"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
withInitializer(integerLiteral(equals(0)))))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
withInitializer(integerLiteral(equals(1)))))));
}
TEST(HasAnyConstructorInitializer, IsWritten) {
static const char Code[] =
"struct Bar { Bar(){} };"
"class Foo {"
" Foo() : foo_() { }"
" Bar foo_;"
" Bar bar_;"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
allOf(forField(hasName("foo_")), isWritten())))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
allOf(forField(hasName("bar_")), isWritten())))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(hasAnyConstructorInitializer(
allOf(forField(hasName("bar_")), unless(isWritten()))))));
}
TEST(HasAnyConstructorInitializer, IsBaseInitializer) {
static const char Code[] =
"struct B {};"
"struct D : B {"
" int I;"
" D(int i) : I(i) {}"
"};"
"struct E : B {"
" E() : B() {}"
"};";
EXPECT_TRUE(matches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isBaseInitializer(), isWritten())),
hasName("E")))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isBaseInitializer(), isWritten())),
hasName("D")))));
EXPECT_TRUE(matches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isMemberInitializer(), isWritten())),
hasName("D")))));
EXPECT_TRUE(notMatches(Code, cxxConstructorDecl(allOf(
hasAnyConstructorInitializer(allOf(isMemberInitializer(), isWritten())),
hasName("E")))));
}
TEST(IfStmt, ChildTraversalMatchers) {
EXPECT_TRUE(matches("void f() { if (false) true; else false; }",
ifStmt(hasThen(cxxBoolLiteral(equals(true))))));
EXPECT_TRUE(notMatches("void f() { if (false) false; else true; }",
ifStmt(hasThen(cxxBoolLiteral(equals(true))))));
EXPECT_TRUE(matches("void f() { if (false) false; else true; }",
ifStmt(hasElse(cxxBoolLiteral(equals(true))))));
EXPECT_TRUE(notMatches("void f() { if (false) true; else false; }",
ifStmt(hasElse(cxxBoolLiteral(equals(true))))));
}
TEST(MatchBinaryOperator, HasOperatorName) {
StatementMatcher OperatorOr = binaryOperator(hasOperatorName("||"));
EXPECT_TRUE(matches("void x() { true || false; }", OperatorOr));
EXPECT_TRUE(notMatches("void x() { true && false; }", OperatorOr));
}
TEST(MatchBinaryOperator, HasLHSAndHasRHS) {
StatementMatcher OperatorTrueFalse =
binaryOperator(hasLHS(cxxBoolLiteral(equals(true))),
hasRHS(cxxBoolLiteral(equals(false))));
EXPECT_TRUE(matches("void x() { true || false; }", OperatorTrueFalse));
EXPECT_TRUE(matches("void x() { true && false; }", OperatorTrueFalse));
EXPECT_TRUE(notMatches("void x() { false || true; }", OperatorTrueFalse));
StatementMatcher OperatorIntPointer = arraySubscriptExpr(
hasLHS(hasType(isInteger())), hasRHS(hasType(pointsTo(qualType()))));
EXPECT_TRUE(matches("void x() { 1[\"abc\"]; }", OperatorIntPointer));
EXPECT_TRUE(notMatches("void x() { \"abc\"[1]; }", OperatorIntPointer));
}
TEST(MatchBinaryOperator, HasEitherOperand) {
StatementMatcher HasOperand =
binaryOperator(hasEitherOperand(cxxBoolLiteral(equals(false))));
EXPECT_TRUE(matches("void x() { true || false; }", HasOperand));
EXPECT_TRUE(matches("void x() { false && true; }", HasOperand));
EXPECT_TRUE(notMatches("void x() { true || true; }", HasOperand));
}
TEST(Matcher, BinaryOperatorTypes) {
// Integration test that verifies the AST provides all binary operators in
// a way we expect.
// FIXME: Operator ','
EXPECT_TRUE(
matches("void x() { 3, 4; }", binaryOperator(hasOperatorName(","))));
EXPECT_TRUE(
matches("bool b; bool c = (b = true);",
binaryOperator(hasOperatorName("="))));
EXPECT_TRUE(
matches("bool b = 1 != 2;", binaryOperator(hasOperatorName("!="))));
EXPECT_TRUE(
matches("bool b = 1 == 2;", binaryOperator(hasOperatorName("=="))));
EXPECT_TRUE(matches("bool b = 1 < 2;", binaryOperator(hasOperatorName("<"))));
EXPECT_TRUE(
matches("bool b = 1 <= 2;", binaryOperator(hasOperatorName("<="))));
EXPECT_TRUE(
matches("int i = 1 << 2;", binaryOperator(hasOperatorName("<<"))));
EXPECT_TRUE(
matches("int i = 1; int j = (i <<= 2);",
binaryOperator(hasOperatorName("<<="))));
EXPECT_TRUE(matches("bool b = 1 > 2;", binaryOperator(hasOperatorName(">"))));
EXPECT_TRUE(
matches("bool b = 1 >= 2;", binaryOperator(hasOperatorName(">="))));
EXPECT_TRUE(
matches("int i = 1 >> 2;", binaryOperator(hasOperatorName(">>"))));
EXPECT_TRUE(
matches("int i = 1; int j = (i >>= 2);",
binaryOperator(hasOperatorName(">>="))));
EXPECT_TRUE(
matches("int i = 42 ^ 23;", binaryOperator(hasOperatorName("^"))));
EXPECT_TRUE(
matches("int i = 42; int j = (i ^= 42);",
binaryOperator(hasOperatorName("^="))));
EXPECT_TRUE(
matches("int i = 42 % 23;", binaryOperator(hasOperatorName("%"))));
EXPECT_TRUE(
matches("int i = 42; int j = (i %= 42);",
binaryOperator(hasOperatorName("%="))));
EXPECT_TRUE(
matches("bool b = 42 &23;", binaryOperator(hasOperatorName("&"))));
EXPECT_TRUE(
matches("bool b = true && false;",
binaryOperator(hasOperatorName("&&"))));
EXPECT_TRUE(
matches("bool b = true; bool c = (b &= false);",
binaryOperator(hasOperatorName("&="))));
EXPECT_TRUE(
matches("bool b = 42 | 23;", binaryOperator(hasOperatorName("|"))));
EXPECT_TRUE(
matches("bool b = true || false;",
binaryOperator(hasOperatorName("||"))));
EXPECT_TRUE(
matches("bool b = true; bool c = (b |= false);",
binaryOperator(hasOperatorName("|="))));
EXPECT_TRUE(
matches("int i = 42 *23;", binaryOperator(hasOperatorName("*"))));
EXPECT_TRUE(
matches("int i = 42; int j = (i *= 23);",
binaryOperator(hasOperatorName("*="))));
EXPECT_TRUE(
matches("int i = 42 / 23;", binaryOperator(hasOperatorName("/"))));
EXPECT_TRUE(
matches("int i = 42; int j = (i /= 23);",
binaryOperator(hasOperatorName("/="))));
EXPECT_TRUE(
matches("int i = 42 + 23;", binaryOperator(hasOperatorName("+"))));
EXPECT_TRUE(
matches("int i = 42; int j = (i += 23);",
binaryOperator(hasOperatorName("+="))));
EXPECT_TRUE(
matches("int i = 42 - 23;", binaryOperator(hasOperatorName("-"))));
EXPECT_TRUE(
matches("int i = 42; int j = (i -= 23);",
binaryOperator(hasOperatorName("-="))));
EXPECT_TRUE(
matches("struct A { void x() { void (A::*a)(); (this->*a)(); } };",
binaryOperator(hasOperatorName("->*"))));
EXPECT_TRUE(
matches("struct A { void x() { void (A::*a)(); ((*this).*a)(); } };",
binaryOperator(hasOperatorName(".*"))));
// Member expressions as operators are not supported in matches.
EXPECT_TRUE(
notMatches("struct A { void x(A *a) { a->x(this); } };",
binaryOperator(hasOperatorName("->"))));
// Initializer assignments are not represented as operator equals.
EXPECT_TRUE(
notMatches("bool b = true;", binaryOperator(hasOperatorName("="))));
// Array indexing is not represented as operator.
EXPECT_TRUE(notMatches("int a[42]; void x() { a[23]; }", unaryOperator()));
// Overloaded operators do not match at all.
EXPECT_TRUE(notMatches(
"struct A { bool operator&&(const A &a) const { return false; } };"
"void x() { A a, b; a && b; }",
binaryOperator()));
}
TEST(MatchUnaryOperator, HasOperatorName) {
StatementMatcher OperatorNot = unaryOperator(hasOperatorName("!"));
EXPECT_TRUE(matches("void x() { !true; } ", OperatorNot));
EXPECT_TRUE(notMatches("void x() { true; } ", OperatorNot));
}
TEST(MatchUnaryOperator, HasUnaryOperand) {
StatementMatcher OperatorOnFalse =
unaryOperator(hasUnaryOperand(cxxBoolLiteral(equals(false))));
EXPECT_TRUE(matches("void x() { !false; }", OperatorOnFalse));
EXPECT_TRUE(notMatches("void x() { !true; }", OperatorOnFalse));
}
TEST(Matcher, UnaryOperatorTypes) {
// Integration test that verifies the AST provides all unary operators in
// a way we expect.
EXPECT_TRUE(matches("bool b = !true;", unaryOperator(hasOperatorName("!"))));
EXPECT_TRUE(
matches("bool b; bool *p = &b;", unaryOperator(hasOperatorName("&"))));
EXPECT_TRUE(matches("int i = ~ 1;", unaryOperator(hasOperatorName("~"))));
EXPECT_TRUE(
matches("bool *p; bool b = *p;", unaryOperator(hasOperatorName("*"))));
EXPECT_TRUE(
matches("int i; int j = +i;", unaryOperator(hasOperatorName("+"))));
EXPECT_TRUE(
matches("int i; int j = -i;", unaryOperator(hasOperatorName("-"))));
EXPECT_TRUE(
matches("int i; int j = ++i;", unaryOperator(hasOperatorName("++"))));
EXPECT_TRUE(
matches("int i; int j = i++;", unaryOperator(hasOperatorName("++"))));
EXPECT_TRUE(
matches("int i; int j = --i;", unaryOperator(hasOperatorName("--"))));
EXPECT_TRUE(
matches("int i; int j = i--;", unaryOperator(hasOperatorName("--"))));
// We don't match conversion operators.
EXPECT_TRUE(notMatches("int i; double d = (double)i;", unaryOperator()));
// Function calls are not represented as operator.
EXPECT_TRUE(notMatches("void f(); void x() { f(); }", unaryOperator()));
// Overloaded operators do not match at all.
// FIXME: We probably want to add that.
EXPECT_TRUE(notMatches(
"struct A { bool operator!() const { return false; } };"
"void x() { A a; !a; }", unaryOperator(hasOperatorName("!"))));
}
TEST(ArraySubscriptMatchers, ArrayIndex) {
EXPECT_TRUE(matches(
"int i[2]; void f() { i[1] = 1; }",
arraySubscriptExpr(hasIndex(integerLiteral(equals(1))))));
EXPECT_TRUE(matches(
"int i[2]; void f() { 1[i] = 1; }",
arraySubscriptExpr(hasIndex(integerLiteral(equals(1))))));
EXPECT_TRUE(notMatches(
"int i[2]; void f() { i[1] = 1; }",
arraySubscriptExpr(hasIndex(integerLiteral(equals(0))))));
}
TEST(ArraySubscriptMatchers, MatchesArrayBase) {
EXPECT_TRUE(matches(
"int i[2]; void f() { i[1] = 2; }",
arraySubscriptExpr(hasBase(implicitCastExpr(
hasSourceExpression(declRefExpr()))))));
}
TEST(Matcher, OfClass) {
StatementMatcher Constructor = cxxConstructExpr(hasDeclaration(cxxMethodDecl(
ofClass(hasName("X")))));
EXPECT_TRUE(
matches("class X { public: X(); }; void x(int) { X x; }", Constructor));
EXPECT_TRUE(
matches("class X { public: X(); }; void x(int) { X x = X(); }",
Constructor));
EXPECT_TRUE(
notMatches("class Y { public: Y(); }; void x(int) { Y y; }",
Constructor));
}
TEST(Matcher, VisitsTemplateInstantiations) {
EXPECT_TRUE(matches(
"class A { public: void x(); };"
"template <typename T> class B { public: void y() { T t; t.x(); } };"
"void f() { B<A> b; b.y(); }",
callExpr(callee(cxxMethodDecl(hasName("x"))))));
EXPECT_TRUE(matches(
"class A { public: void x(); };"
"class C {"
" public:"
" template <typename T> class B { public: void y() { T t; t.x(); } };"
"};"
"void f() {"
" C::B<A> b; b.y();"
"}",
recordDecl(hasName("C"), hasDescendant(callExpr(
callee(cxxMethodDecl(hasName("x"))))))));
}
TEST(Matcher, HasCondition) {
StatementMatcher IfStmt =
ifStmt(hasCondition(cxxBoolLiteral(equals(true))));
EXPECT_TRUE(matches("void x() { if (true) {} }", IfStmt));
EXPECT_TRUE(notMatches("void x() { if (false) {} }", IfStmt));
StatementMatcher ForStmt =
forStmt(hasCondition(cxxBoolLiteral(equals(true))));
EXPECT_TRUE(matches("void x() { for (;true;) {} }", ForStmt));
EXPECT_TRUE(notMatches("void x() { for (;false;) {} }", ForStmt));
StatementMatcher WhileStmt =
whileStmt(hasCondition(cxxBoolLiteral(equals(true))));
EXPECT_TRUE(matches("void x() { while (true) {} }", WhileStmt));
EXPECT_TRUE(notMatches("void x() { while (false) {} }", WhileStmt));
StatementMatcher SwitchStmt =
switchStmt(hasCondition(integerLiteral(equals(42))));
EXPECT_TRUE(matches("void x() { switch (42) {case 42:;} }", SwitchStmt));
EXPECT_TRUE(notMatches("void x() { switch (43) {case 43:;} }", SwitchStmt));
}
TEST(For, ForLoopInternals) {
EXPECT_TRUE(matches("void f(){ int i; for (; i < 3 ; ); }",
forStmt(hasCondition(anything()))));
EXPECT_TRUE(matches("void f() { for (int i = 0; ;); }",
forStmt(hasLoopInit(anything()))));
}
TEST(For, ForRangeLoopInternals) {
EXPECT_TRUE(matches("void f(){ int a[] {1, 2}; for (int i : a); }",
cxxForRangeStmt(hasLoopVariable(anything()))));
EXPECT_TRUE(matches(
"void f(){ int a[] {1, 2}; for (int i : a); }",
cxxForRangeStmt(hasRangeInit(declRefExpr(to(varDecl(hasName("a"))))))));
}
TEST(For, NegativeForLoopInternals) {
EXPECT_TRUE(notMatches("void f(){ for (int i = 0; ; ++i); }",
forStmt(hasCondition(expr()))));
EXPECT_TRUE(notMatches("void f() {int i; for (; i < 4; ++i) {} }",
forStmt(hasLoopInit(anything()))));
}
TEST(HasBody, FindsBodyOfForWhileDoLoops) {
EXPECT_TRUE(matches("void f() { for(;;) {} }",
forStmt(hasBody(compoundStmt()))));
EXPECT_TRUE(notMatches("void f() { for(;;); }",
forStmt(hasBody(compoundStmt()))));
EXPECT_TRUE(matches("void f() { while(true) {} }",
whileStmt(hasBody(compoundStmt()))));
EXPECT_TRUE(matches("void f() { do {} while(true); }",
doStmt(hasBody(compoundStmt()))));
EXPECT_TRUE(matches("void f() { int p[2]; for (auto x : p) {} }",
cxxForRangeStmt(hasBody(compoundStmt()))));
EXPECT_TRUE(matches("void f() {}", functionDecl(hasBody(compoundStmt()))));
EXPECT_TRUE(notMatches("void f();", functionDecl(hasBody(compoundStmt()))));
EXPECT_TRUE(matches("void f(); void f() {}",
functionDecl(hasBody(compoundStmt()))));
}
TEST(HasAnySubstatement, MatchesForTopLevelCompoundStatement) {
// The simplest case: every compound statement is in a function
// definition, and the function body itself must be a compound
// statement.
EXPECT_TRUE(matches("void f() { for (;;); }",
compoundStmt(hasAnySubstatement(forStmt()))));
}
TEST(HasAnySubstatement, IsNotRecursive) {
// It's really "has any immediate substatement".
EXPECT_TRUE(notMatches("void f() { if (true) for (;;); }",
compoundStmt(hasAnySubstatement(forStmt()))));
}
TEST(HasAnySubstatement, MatchesInNestedCompoundStatements) {
EXPECT_TRUE(matches("void f() { if (true) { for (;;); } }",
compoundStmt(hasAnySubstatement(forStmt()))));
}
TEST(HasAnySubstatement, FindsSubstatementBetweenOthers) {
EXPECT_TRUE(matches("void f() { 1; 2; 3; for (;;); 4; 5; 6; }",
compoundStmt(hasAnySubstatement(forStmt()))));
}
TEST(Member, MatchesMemberAllocationFunction) {
// Fails in C++11 mode
EXPECT_TRUE(matchesConditionally(
"namespace std { typedef typeof(sizeof(int)) size_t; }"
"class X { void *operator new(std::size_t); };",
cxxMethodDecl(ofClass(hasName("X"))), true, "-std=gnu++98"));
EXPECT_TRUE(matches("class X { void operator delete(void*); };",
cxxMethodDecl(ofClass(hasName("X")))));
// Fails in C++11 mode
EXPECT_TRUE(matchesConditionally(
"namespace std { typedef typeof(sizeof(int)) size_t; }"
"class X { void operator delete[](void*, std::size_t); };",
cxxMethodDecl(ofClass(hasName("X"))), true, "-std=gnu++98"));
}
TEST(HasDestinationType, MatchesSimpleCase) {
EXPECT_TRUE(matches("char* p = static_cast<char*>(0);",
cxxStaticCastExpr(hasDestinationType(
pointsTo(TypeMatcher(anything()))))));
}
TEST(HasImplicitDestinationType, MatchesSimpleCase) {
// This test creates an implicit const cast.
EXPECT_TRUE(matches("int x; const int i = x;",
implicitCastExpr(
hasImplicitDestinationType(isInteger()))));
// This test creates an implicit array-to-pointer cast.
EXPECT_TRUE(matches("int arr[3]; int *p = arr;",
implicitCastExpr(hasImplicitDestinationType(
pointsTo(TypeMatcher(anything()))))));
}
TEST(HasImplicitDestinationType, DoesNotMatchIncorrectly) {
// This test creates an implicit cast from int to char.
EXPECT_TRUE(notMatches("char c = 0;",
implicitCastExpr(hasImplicitDestinationType(
unless(anything())))));
// This test creates an implicit array-to-pointer cast.
EXPECT_TRUE(notMatches("int arr[3]; int *p = arr;",
implicitCastExpr(hasImplicitDestinationType(
unless(anything())))));
}
TEST(Matcher, IgnoresElidableConstructors) {
EXPECT_TRUE(
matches("struct H {};"
"template<typename T> H B(T A);"
"void f() {"
" H D1;"
" D1 = B(B(1));"
"}",
cxxOperatorCallExpr(hasArgument(
1, callExpr(hasArgument(
0, ignoringElidableConstructorCall(callExpr()))))),
LanguageMode::Cxx11OrLater));
EXPECT_TRUE(
matches("struct H {};"
"template<typename T> H B(T A);"
"void f() {"
" H D1;"
" D1 = B(1);"
"}",
cxxOperatorCallExpr(hasArgument(
1, callExpr(hasArgument(0, ignoringElidableConstructorCall(
integerLiteral()))))),
LanguageMode::Cxx11OrLater));
EXPECT_TRUE(matches(
"struct H {};"
"H G();"
"void f() {"
" H D = G();"
"}",
varDecl(hasInitializer(anyOf(
ignoringElidableConstructorCall(callExpr()),
exprWithCleanups(has(ignoringElidableConstructorCall(callExpr())))))),
LanguageMode::Cxx11OrLater));
}
TEST(Matcher, IgnoresElidableInReturn) {
auto matcher = expr(ignoringElidableConstructorCall(declRefExpr()));
EXPECT_TRUE(matches("struct H {};"
"H f() {"
" H g;"
" return g;"
"}",
matcher, LanguageMode::Cxx11OrLater));
EXPECT_TRUE(notMatches("struct H {};"
"H f() {"
" return H();"
"}",
matcher, LanguageMode::Cxx11OrLater));
}
TEST(Matcher, IgnoreElidableConstructorDoesNotMatchConstructors) {
EXPECT_TRUE(matches("struct H {};"
"void f() {"
" H D;"
"}",
varDecl(hasInitializer(
ignoringElidableConstructorCall(cxxConstructExpr()))),
LanguageMode::Cxx11OrLater));
}
TEST(Matcher, IgnoresElidableDoesNotPreventMatches) {
EXPECT_TRUE(matches("void f() {"
" int D = 10;"
"}",
expr(ignoringElidableConstructorCall(integerLiteral())),
LanguageMode::Cxx11OrLater));
}
TEST(Matcher, IgnoresElidableInVarInit) {
auto matcher =
varDecl(hasInitializer(ignoringElidableConstructorCall(callExpr())));
EXPECT_TRUE(matches("struct H {};"
"H G();"
"void f(H D = G()) {"
" return;"
"}",
matcher, LanguageMode::Cxx11OrLater));
EXPECT_TRUE(matches("struct H {};"
"H G();"
"void f() {"
" H D = G();"
"}",
matcher, LanguageMode::Cxx11OrLater));
}
TEST(IgnoringImplicit, MatchesImplicit) {
EXPECT_TRUE(matches("class C {}; C a = C();",
varDecl(has(ignoringImplicit(cxxConstructExpr())))));
}
TEST(IgnoringImplicit, MatchesNestedImplicit) {
const char *Code = R"(
struct OtherType;
struct SomeType
{
SomeType() {}
SomeType(const OtherType&) {}
SomeType& operator=(OtherType const&) { return *this; }
};
struct OtherType
{
OtherType() {}
~OtherType() {}
};
OtherType something()
{
return {};
}
int main()
{
SomeType i = something();
}
)";
EXPECT_TRUE(matches(Code, varDecl(
hasName("i"),
hasInitializer(exprWithCleanups(has(
cxxConstructExpr(has(expr(ignoringImplicit(cxxConstructExpr(
has(expr(ignoringImplicit(callExpr())))
)))))
)))
)
));
}
TEST(IgnoringImplicit, DoesNotMatchIncorrectly) {
EXPECT_TRUE(
notMatches("class C {}; C a = C();", varDecl(has(cxxConstructExpr()))));
}
TEST(Traversal, traverseMatcher) {
const char *VarDeclCode = R"cpp(
void foo()
{
int i = 3.0;
}
)cpp";
auto Matcher = varDecl(hasInitializer(floatLiteral()));
EXPECT_TRUE(
notMatches(VarDeclCode, traverse(ast_type_traits::TK_AsIs, Matcher)));
EXPECT_TRUE(
matches(VarDeclCode,
traverse(ast_type_traits::TK_IgnoreImplicitCastsAndParentheses,
Matcher)));
auto ParentMatcher = floatLiteral(hasParent(varDecl(hasName("i"))));
EXPECT_TRUE(notMatches(VarDeclCode,
traverse(ast_type_traits::TK_AsIs, ParentMatcher)));
EXPECT_TRUE(matches(VarDeclCode,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
ParentMatcher)));
EXPECT_TRUE(
matches(VarDeclCode, decl(traverse(ast_type_traits::TK_AsIs,
anyOf(cxxRecordDecl(), varDecl())))));
EXPECT_TRUE(matches(VarDeclCode,
floatLiteral(traverse(ast_type_traits::TK_AsIs,
hasParent(implicitCastExpr())))));
EXPECT_TRUE(matches(
VarDeclCode,
floatLiteral(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
hasParent(varDecl())))));
EXPECT_TRUE(
matches(VarDeclCode,
varDecl(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
unless(parmVarDecl())))));
EXPECT_TRUE(notMatches(
VarDeclCode,
varDecl(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
has(implicitCastExpr())))));
EXPECT_TRUE(matches(VarDeclCode, varDecl(traverse(ast_type_traits::TK_AsIs,
has(implicitCastExpr())))));
EXPECT_TRUE(matches(
VarDeclCode,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
// The has() below strips away the ImplicitCastExpr before the
// traverse(AsIs) gets to process it.
varDecl(has(traverse(ast_type_traits::TK_AsIs, floatLiteral()))))));
EXPECT_TRUE(matches(
VarDeclCode,
functionDecl(traverse(ast_type_traits::TK_AsIs, hasName("foo")))));
EXPECT_TRUE(matches(
VarDeclCode,
functionDecl(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
hasName("foo")))));
EXPECT_TRUE(
matches(VarDeclCode, functionDecl(traverse(ast_type_traits::TK_AsIs,
hasAnyName("foo", "bar")))));
EXPECT_TRUE(matches(
VarDeclCode,
functionDecl(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
hasAnyName("foo", "bar")))));
const char *Code = R"cpp(
void foo(int a)
{
int i = 3.0 + a;
}
void bar()
{
foo(7.0);
}
)cpp";
EXPECT_TRUE(
matches(Code,
callExpr(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
hasArgument(0, floatLiteral())))));
EXPECT_TRUE(
matches(Code,
callExpr(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
hasAnyArgument(floatLiteral())))));
EXPECT_TRUE(
matches(VarDeclCode,
varDecl(traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
hasType(builtinType())))));
EXPECT_TRUE(matches(
VarDeclCode,
functionDecl(hasName("foo"), traverse(ast_type_traits::TK_AsIs,
hasDescendant(floatLiteral())))));
EXPECT_TRUE(notMatches(Code, traverse(ast_type_traits::TK_AsIs,
floatLiteral(hasParent(callExpr(callee(
functionDecl(hasName("foo")))))))));
EXPECT_TRUE(
matches(Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
floatLiteral(hasParent(callExpr(
callee(functionDecl(hasName("foo")))))))));
Code = R"cpp(
void foo()
{
int i = (3);
}
)cpp";
EXPECT_TRUE(
matches(Code,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
varDecl(hasInitializer(integerLiteral(equals(3)))))));
EXPECT_TRUE(matches(
Code,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
integerLiteral(equals(3), hasParent(varDecl(hasName("i")))))));
Code = R"cpp(
const char *SomeString{"str"};
)cpp";
EXPECT_TRUE(matches(Code, traverse(ast_type_traits::TK_AsIs,
stringLiteral(hasParent(implicitCastExpr(
hasParent(initListExpr())))))));
EXPECT_TRUE(
matches(Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
stringLiteral(hasParent(initListExpr())))));
}
template <typename MatcherT>
bool matcherTemplateWithBinding(StringRef Code, const MatcherT &M) {
return matchAndVerifyResultTrue(
std::string(Code), M.bind("matchedStmt"),
std::make_unique<VerifyIdIsBoundTo<ReturnStmt>>("matchedStmt", 1));
}
TEST(Traversal, traverseWithBinding) {
// Some existing matcher code expects to take a matcher as a
// template arg and bind to it. Verify that that works.
llvm::StringRef Code = R"cpp(
int foo()
{
return 42.0;
}
)cpp";
EXPECT_TRUE(matcherTemplateWithBinding(
Code,
traverse(ast_type_traits::TK_AsIs,
returnStmt(has(implicitCastExpr(has(floatLiteral())))))));
}
TEST(Traversal, traverseMatcherNesting) {
const char *Code = R"cpp(
float bar(int i)
{
return i;
}
void foo()
{
bar(bar(3.0));
}
)cpp";
EXPECT_TRUE(matches(
Code,
traverse(ast_type_traits::TK_IgnoreImplicitCastsAndParentheses,
callExpr(has(callExpr(traverse(
ast_type_traits::TK_AsIs,
callExpr(has(implicitCastExpr(has(floatLiteral())))))))))));
}
TEST(Traversal, traverseMatcherThroughImplicit) {
const char *Code = R"cpp(
struct S {
S(int x);
};
void constructImplicit() {
int a = 8;
S s(a);
}
)cpp";
auto Matcher = traverse(ast_type_traits::TK_IgnoreImplicitCastsAndParentheses,
implicitCastExpr());
// Verfiy that it does not segfault
EXPECT_FALSE(matches(Code, Matcher));
}
TEST(Traversal, traverseMatcherThroughMemoization) {
const char *Code = R"cpp(
void foo()
{
int i = 3.0;
}
)cpp";
auto Matcher = varDecl(hasInitializer(floatLiteral()));
// Matchers such as hasDescendant memoize their result regarding AST
// nodes. In the matcher below, the first use of hasDescendant(Matcher)
// fails, and the use of it inside the traverse() matcher should pass
// causing the overall matcher to be a true match.
// This test verifies that the first false result is not re-used, which
// would cause the overall matcher to be incorrectly false.
EXPECT_TRUE(matches(
Code, functionDecl(anyOf(
hasDescendant(Matcher),
traverse(ast_type_traits::TK_IgnoreImplicitCastsAndParentheses,
functionDecl(hasDescendant(Matcher)))))));
}
TEST(Traversal, traverseUnlessSpelledInSource) {
const char *Code = R"cpp(
struct A
{
};
struct B
{
B(int);
B(A const& a);
B();
};
struct C
{
operator B();
};
B func1() {
return 42;
}
B func2() {
return B{42};
}
B func3() {
return B(42);
}
B func4() {
return B();
}
B func5() {
return B{};
}
B func6() {
return C();
}
B func7() {
return A();
}
B func8() {
return C{};
}
B func9() {
return A{};
}
B func10() {
A a;
return a;
}
B func11() {
B b;
return b;
}
B func12() {
C c;
return c;
}
void func13() {
int a = 0;
int c = 0;
[a, b = c](int d) { int e = d; };
}
void func14() {
[] <typename TemplateType> (TemplateType t, TemplateType u) { int e = t + u; };
float i = 42.0;
}
)cpp";
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func1"))),
hasReturnValue(integerLiteral(equals(42)))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
integerLiteral(equals(42),
hasParent(returnStmt(forFunction(
functionDecl(hasName("func1")))))))));
EXPECT_TRUE(matches(
Code,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func2"))),
hasReturnValue(cxxTemporaryObjectExpr(
hasArgument(0, integerLiteral(equals(42)))))))));
EXPECT_TRUE(matches(
Code,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
integerLiteral(
equals(42),
hasParent(cxxTemporaryObjectExpr(hasParent(returnStmt(
forFunction(functionDecl(hasName("func2")))))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func3"))),
hasReturnValue(
cxxFunctionalCastExpr(hasSourceExpression(
integerLiteral(equals(42)))))))));
EXPECT_TRUE(matches(
Code,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
integerLiteral(
equals(42),
hasParent(cxxFunctionalCastExpr(hasParent(returnStmt(
forFunction(functionDecl(hasName("func3")))))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func4"))),
hasReturnValue(cxxTemporaryObjectExpr())))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func5"))),
hasReturnValue(cxxTemporaryObjectExpr())))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func6"))),
hasReturnValue(cxxTemporaryObjectExpr())))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func7"))),
hasReturnValue(cxxTemporaryObjectExpr())))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func8"))),
hasReturnValue(cxxFunctionalCastExpr(
hasSourceExpression(initListExpr())))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func9"))),
hasReturnValue(cxxFunctionalCastExpr(
hasSourceExpression(initListExpr())))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func10"))),
hasReturnValue(
declRefExpr(to(varDecl(hasName("a")))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
declRefExpr(to(varDecl(hasName("a"))),
hasParent(returnStmt(forFunction(
functionDecl(hasName("func10")))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func11"))),
hasReturnValue(
declRefExpr(to(varDecl(hasName("b")))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
declRefExpr(to(varDecl(hasName("b"))),
hasParent(returnStmt(forFunction(
functionDecl(hasName("func11")))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
returnStmt(forFunction(functionDecl(hasName("func12"))),
hasReturnValue(
declRefExpr(to(varDecl(hasName("c")))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
declRefExpr(to(varDecl(hasName("c"))),
hasParent(returnStmt(forFunction(
functionDecl(hasName("func12")))))))));
EXPECT_TRUE(matches(
Code,
traverse(
ast_type_traits::TK_IgnoreUnlessSpelledInSource,
lambdaExpr(forFunction(functionDecl(hasName("func13"))),
has(compoundStmt(hasDescendant(varDecl(hasName("e"))))),
has(declRefExpr(to(varDecl(hasName("a"))))),
has(varDecl(hasName("b"), hasInitializer(declRefExpr(to(
varDecl(hasName("c"))))))),
has(parmVarDecl(hasName("d")))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
declRefExpr(to(varDecl(hasName("a"))),
hasParent(lambdaExpr(forFunction(
functionDecl(hasName("func13")))))))));
EXPECT_TRUE(matches(
Code,
traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
varDecl(hasName("b"),
hasInitializer(declRefExpr(to(varDecl(hasName("c"))))),
hasParent(lambdaExpr(
forFunction(functionDecl(hasName("func13")))))))));
EXPECT_TRUE(matches(
Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
lambdaExpr(
forFunction(functionDecl(hasName("func14"))),
has(templateTypeParmDecl(hasName("TemplateType")))))));
EXPECT_TRUE(
matches(Code, traverse(ast_type_traits::TK_IgnoreUnlessSpelledInSource,
functionDecl(hasName("func14"),
hasDescendant(floatLiteral())))));
}
TEST(IgnoringImpCasts, MatchesImpCasts) {
// This test checks that ignoringImpCasts matches when implicit casts are
// present and its inner matcher alone does not match.
// Note that this test creates an implicit const cast.
EXPECT_TRUE(matches("int x = 0; const int y = x;",
varDecl(hasInitializer(ignoringImpCasts(
declRefExpr(to(varDecl(hasName("x")))))))));
// This test creates an implict cast from int to char.
EXPECT_TRUE(matches("char x = 0;",
varDecl(hasInitializer(ignoringImpCasts(
integerLiteral(equals(0)))))));
}
TEST(IgnoringImpCasts, DoesNotMatchIncorrectly) {
// These tests verify that ignoringImpCasts does not match if the inner
// matcher does not match.
// Note that the first test creates an implicit const cast.
EXPECT_TRUE(notMatches("int x; const int y = x;",
varDecl(hasInitializer(ignoringImpCasts(
unless(anything()))))));
EXPECT_TRUE(notMatches("int x; int y = x;",
varDecl(hasInitializer(ignoringImpCasts(
unless(anything()))))));
// These tests verify that ignoringImplictCasts does not look through explicit
// casts or parentheses.
EXPECT_TRUE(notMatches("char* p = static_cast<char*>(0);",
varDecl(hasInitializer(ignoringImpCasts(
integerLiteral())))));
EXPECT_TRUE(notMatches("int i = (0);",
varDecl(hasInitializer(ignoringImpCasts(
integerLiteral())))));
EXPECT_TRUE(notMatches("float i = (float)0;",
varDecl(hasInitializer(ignoringImpCasts(
integerLiteral())))));
EXPECT_TRUE(notMatches("float i = float(0);",
varDecl(hasInitializer(ignoringImpCasts(
integerLiteral())))));
}
TEST(IgnoringImpCasts, MatchesWithoutImpCasts) {
// This test verifies that expressions that do not have implicit casts
// still match the inner matcher.
EXPECT_TRUE(matches("int x = 0; int &y = x;",
varDecl(hasInitializer(ignoringImpCasts(
declRefExpr(to(varDecl(hasName("x")))))))));
}
TEST(IgnoringParenCasts, MatchesParenCasts) {
// This test checks that ignoringParenCasts matches when parentheses and/or
// casts are present and its inner matcher alone does not match.
EXPECT_TRUE(matches("int x = (0);",
varDecl(hasInitializer(ignoringParenCasts(
integerLiteral(equals(0)))))));
EXPECT_TRUE(matches("int x = (((((0)))));",
varDecl(hasInitializer(ignoringParenCasts(
integerLiteral(equals(0)))))));
// This test creates an implict cast from int to char in addition to the
// parentheses.
EXPECT_TRUE(matches("char x = (0);",
varDecl(hasInitializer(ignoringParenCasts(
integerLiteral(equals(0)))))));
EXPECT_TRUE(matches("char x = (char)0;",
varDecl(hasInitializer(ignoringParenCasts(
integerLiteral(equals(0)))))));
EXPECT_TRUE(matches("char* p = static_cast<char*>(0);",
varDecl(hasInitializer(ignoringParenCasts(
integerLiteral(equals(0)))))));
}
TEST(IgnoringParenCasts, MatchesWithoutParenCasts) {
// This test verifies that expressions that do not have any casts still match.
EXPECT_TRUE(matches("int x = 0;",
varDecl(hasInitializer(ignoringParenCasts(
integerLiteral(equals(0)))))));
}
TEST(IgnoringParenCasts, DoesNotMatchIncorrectly) {
// These tests verify that ignoringImpCasts does not match if the inner
// matcher does not match.
EXPECT_TRUE(notMatches("int x = ((0));",
varDecl(hasInitializer(ignoringParenCasts(
unless(anything()))))));
// This test creates an implicit cast from int to char in addition to the
// parentheses.
EXPECT_TRUE(notMatches("char x = ((0));",
varDecl(hasInitializer(ignoringParenCasts(
unless(anything()))))));
EXPECT_TRUE(notMatches("char *x = static_cast<char *>((0));",
varDecl(hasInitializer(ignoringParenCasts(
unless(anything()))))));
}
TEST(IgnoringParenAndImpCasts, MatchesParenImpCasts) {
// This test checks that ignoringParenAndImpCasts matches when
// parentheses and/or implicit casts are present and its inner matcher alone
// does not match.
// Note that this test creates an implicit const cast.
EXPECT_TRUE(matches("int x = 0; const int y = x;",
varDecl(hasInitializer(ignoringParenImpCasts(
declRefExpr(to(varDecl(hasName("x")))))))));
// This test creates an implicit cast from int to char.
EXPECT_TRUE(matches("const char x = (0);",
varDecl(hasInitializer(ignoringParenImpCasts(
integerLiteral(equals(0)))))));
}
TEST(IgnoringParenAndImpCasts, MatchesWithoutParenImpCasts) {
// This test verifies that expressions that do not have parentheses or
// implicit casts still match.
EXPECT_TRUE(matches("int x = 0; int &y = x;",
varDecl(hasInitializer(ignoringParenImpCasts(
declRefExpr(to(varDecl(hasName("x")))))))));
EXPECT_TRUE(matches("int x = 0;",
varDecl(hasInitializer(ignoringParenImpCasts(
integerLiteral(equals(0)))))));
}
TEST(IgnoringParenAndImpCasts, DoesNotMatchIncorrectly) {
// These tests verify that ignoringParenImpCasts does not match if
// the inner matcher does not match.
// This test creates an implicit cast.
EXPECT_TRUE(notMatches("char c = ((3));",
varDecl(hasInitializer(ignoringParenImpCasts(
unless(anything()))))));
// These tests verify that ignoringParenAndImplictCasts does not look
// through explicit casts.
EXPECT_TRUE(notMatches("float y = (float(0));",
varDecl(hasInitializer(ignoringParenImpCasts(
integerLiteral())))));
EXPECT_TRUE(notMatches("float y = (float)0;",
varDecl(hasInitializer(ignoringParenImpCasts(
integerLiteral())))));
EXPECT_TRUE(notMatches("char* p = static_cast<char*>(0);",
varDecl(hasInitializer(ignoringParenImpCasts(
integerLiteral())))));
}
TEST(HasSourceExpression, MatchesImplicitCasts) {
EXPECT_TRUE(matches("class string {}; class URL { public: URL(string s); };"
"void r() {string a_string; URL url = a_string; }",
implicitCastExpr(
hasSourceExpression(cxxConstructExpr()))));
}
TEST(HasSourceExpression, MatchesExplicitCasts) {
EXPECT_TRUE(matches("float x = static_cast<float>(42);",
explicitCastExpr(
hasSourceExpression(hasDescendant(
expr(integerLiteral()))))));
}
TEST(UsingDeclaration, MatchesSpecificTarget) {
EXPECT_TRUE(matches("namespace f { int a; void b(); } using f::b;",
usingDecl(hasAnyUsingShadowDecl(
hasTargetDecl(functionDecl())))));
EXPECT_TRUE(notMatches("namespace f { int a; void b(); } using f::a;",
usingDecl(hasAnyUsingShadowDecl(
hasTargetDecl(functionDecl())))));
}
TEST(UsingDeclaration, ThroughUsingDeclaration) {
EXPECT_TRUE(matches(
"namespace a { void f(); } using a::f; void g() { f(); }",
declRefExpr(throughUsingDecl(anything()))));
EXPECT_TRUE(notMatches(
"namespace a { void f(); } using a::f; void g() { a::f(); }",
declRefExpr(throughUsingDecl(anything()))));
}
TEST(SingleDecl, IsSingleDecl) {
StatementMatcher SingleDeclStmt =
declStmt(hasSingleDecl(varDecl(hasInitializer(anything()))));
EXPECT_TRUE(matches("void f() {int a = 4;}", SingleDeclStmt));
EXPECT_TRUE(notMatches("void f() {int a;}", SingleDeclStmt));
EXPECT_TRUE(notMatches("void f() {int a = 4, b = 3;}",
SingleDeclStmt));
}
TEST(DeclStmt, ContainsDeclaration) {
DeclarationMatcher MatchesInit = varDecl(hasInitializer(anything()));
EXPECT_TRUE(matches("void f() {int a = 4;}",
declStmt(containsDeclaration(0, MatchesInit))));
EXPECT_TRUE(matches("void f() {int a = 4, b = 3;}",
declStmt(containsDeclaration(0, MatchesInit),
containsDeclaration(1, MatchesInit))));
unsigned WrongIndex = 42;
EXPECT_TRUE(notMatches("void f() {int a = 4, b = 3;}",
declStmt(containsDeclaration(WrongIndex,
MatchesInit))));
}
TEST(SwitchCase, MatchesEachCase) {
EXPECT_TRUE(notMatches("void x() { switch(42); }",
switchStmt(forEachSwitchCase(caseStmt()))));
EXPECT_TRUE(matches("void x() { switch(42) case 42:; }",
switchStmt(forEachSwitchCase(caseStmt()))));
EXPECT_TRUE(matches("void x() { switch(42) { case 42:; } }",
switchStmt(forEachSwitchCase(caseStmt()))));
EXPECT_TRUE(notMatches(
"void x() { if (1) switch(42) { case 42: switch (42) { default:; } } }",
ifStmt(has(switchStmt(forEachSwitchCase(defaultStmt()))))));
EXPECT_TRUE(matches("void x() { switch(42) { case 1+1: case 4:; } }",
switchStmt(forEachSwitchCase(
caseStmt(hasCaseConstant(
constantExpr(has(integerLiteral()))))))));
EXPECT_TRUE(notMatches("void x() { switch(42) { case 1+1: case 2+2:; } }",
switchStmt(forEachSwitchCase(
caseStmt(hasCaseConstant(
constantExpr(has(integerLiteral()))))))));
EXPECT_TRUE(notMatches("void x() { switch(42) { case 1 ... 2:; } }",
switchStmt(forEachSwitchCase(
caseStmt(hasCaseConstant(
constantExpr(has(integerLiteral()))))))));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void x() { switch (42) { case 1: case 2: case 3: default:; } }",
switchStmt(forEachSwitchCase(caseStmt().bind("x"))),
std::make_unique<VerifyIdIsBoundTo<CaseStmt>>("x", 3)));
}
TEST(Declaration, HasExplicitSpecifier) {
EXPECT_TRUE(matchesConditionally(
"void f();", functionDecl(hasExplicitSpecifier(constantExpr())), false,
"-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"template<bool b> struct S { explicit operator int(); };",
cxxConversionDecl(hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
false, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"template<bool b> struct S { explicit(b) operator int(); };",
cxxConversionDecl(hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
false, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"struct S { explicit(true) operator int(); };",
cxxConversionDecl(hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
true, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"struct S { explicit(false) operator int(); };",
cxxConversionDecl(hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
true, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"template<bool b> struct S { explicit(b) S(int); };",
cxxConstructorDecl(hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
false, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"struct S { explicit(true) S(int); };",
cxxConstructorDecl(hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
true, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"struct S { explicit(false) S(int); };",
cxxConstructorDecl(hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
true, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally(
"template<typename T> struct S { S(int); };"
"template<bool b = true> explicit(b) S(int) -> S<int>;",
cxxDeductionGuideDecl(
hasExplicitSpecifier(constantExpr(has(cxxBoolLiteral())))),
false, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally("template<typename T> struct S { S(int); };"
"explicit(true) S(int) -> S<int>;",
cxxDeductionGuideDecl(hasExplicitSpecifier(
constantExpr(has(cxxBoolLiteral())))),
true, "-std=c++2a"));
EXPECT_TRUE(matchesConditionally("template<typename T> struct S { S(int); };"
"explicit(false) S(int) -> S<int>;",
cxxDeductionGuideDecl(hasExplicitSpecifier(
constantExpr(has(cxxBoolLiteral())))),
true, "-std=c++2a"));
}
TEST(ForEachConstructorInitializer, MatchesInitializers) {
EXPECT_TRUE(matches(
"struct X { X() : i(42), j(42) {} int i, j; };",
cxxConstructorDecl(forEachConstructorInitializer(cxxCtorInitializer()))));
}
TEST(HasConditionVariableStatement, DoesNotMatchCondition) {
EXPECT_TRUE(notMatches(
"void x() { if(true) {} }",
ifStmt(hasConditionVariableStatement(declStmt()))));
EXPECT_TRUE(notMatches(
"void x() { int x; if((x = 42)) {} }",
ifStmt(hasConditionVariableStatement(declStmt()))));
}
TEST(HasConditionVariableStatement, MatchesConditionVariables) {
EXPECT_TRUE(matches(
"void x() { if(int* a = 0) {} }",
ifStmt(hasConditionVariableStatement(declStmt()))));
}
TEST(ForEach, BindsOneNode) {
EXPECT_TRUE(matchAndVerifyResultTrue("class C { int x; };",
recordDecl(hasName("C"), forEach(fieldDecl(hasName("x")).bind("x"))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("x", 1)));
}
TEST(ForEach, BindsMultipleNodes) {
EXPECT_TRUE(matchAndVerifyResultTrue("class C { int x; int y; int z; };",
recordDecl(hasName("C"), forEach(fieldDecl().bind("f"))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("f", 3)));
}
TEST(ForEach, BindsRecursiveCombinations) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class C { class D { int x; int y; }; class E { int y; int z; }; };",
recordDecl(hasName("C"),
forEach(recordDecl(forEach(fieldDecl().bind("f"))))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("f", 4)));
}
TEST(ForEachDescendant, BindsOneNode) {
EXPECT_TRUE(matchAndVerifyResultTrue("class C { class D { int x; }; };",
recordDecl(hasName("C"),
forEachDescendant(fieldDecl(hasName("x")).bind("x"))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("x", 1)));
}
TEST(ForEachDescendant, NestedForEachDescendant) {
DeclarationMatcher m = recordDecl(
isDefinition(), decl().bind("x"), hasName("C"));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A { class B { class C {}; }; };",
recordDecl(hasName("A"), anyOf(m, forEachDescendant(m))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", "C")));
// Check that a partial match of 'm' that binds 'x' in the
// first part of anyOf(m, anything()) will not overwrite the
// binding created by the earlier binding in the hasDescendant.
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A { class B { class C {}; }; };",
recordDecl(hasName("A"), allOf(hasDescendant(m), anyOf(m, anything()))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", "C")));
}
TEST(ForEachDescendant, BindsMultipleNodes) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class C { class D { int x; int y; }; "
" class E { class F { int y; int z; }; }; };",
recordDecl(hasName("C"), forEachDescendant(fieldDecl().bind("f"))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("f", 4)));
}
TEST(ForEachDescendant, BindsRecursiveCombinations) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class C { class D { "
" class E { class F { class G { int y; int z; }; }; }; }; };",
recordDecl(hasName("C"), forEachDescendant(recordDecl(
forEachDescendant(fieldDecl().bind("f"))))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("f", 8)));
}
TEST(ForEachDescendant, BindsCombinations) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f() { if(true) {} if (true) {} while (true) {} if (true) {} while "
"(true) {} }",
compoundStmt(forEachDescendant(ifStmt().bind("if")),
forEachDescendant(whileStmt().bind("while"))),
std::make_unique<VerifyIdIsBoundTo<IfStmt>>("if", 6)));
}
TEST(Has, DoesNotDeleteBindings) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { int a; };", recordDecl(decl().bind("x"), has(fieldDecl())),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
}
TEST(LoopingMatchers, DoNotOverwritePreviousMatchResultOnFailure) {
// Those matchers cover all the cases where an inner matcher is called
// and there is not a 1:1 relationship between the match of the outer
// matcher and the match of the inner matcher.
// The pattern to look for is:
// ... return InnerMatcher.matches(...); ...
// In which case no special handling is needed.
//
// On the other hand, if there are multiple alternative matches
// (for example forEach*) or matches might be discarded (for example has*)
// the implementation must make sure that the discarded matches do not
// affect the bindings.
// When new such matchers are added, add a test here that:
// - matches a simple node, and binds it as the first thing in the matcher:
// recordDecl(decl().bind("x"), hasName("X")))
// - uses the matcher under test afterwards in a way that not the first
// alternative is matched; for anyOf, that means the first branch
// would need to return false; for hasAncestor, it means that not
// the direct parent matches the inner matcher.
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { int y; };",
recordDecl(
recordDecl().bind("x"), hasName("::X"),
anyOf(forEachDescendant(recordDecl(hasName("Y"))), anything())),
std::make_unique<VerifyIdIsBoundTo<CXXRecordDecl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X {};", recordDecl(recordDecl().bind("x"), hasName("::X"),
anyOf(unless(anything()), anything())),
std::make_unique<VerifyIdIsBoundTo<CXXRecordDecl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"template<typename T1, typename T2> class X {}; X<float, int> x;",
classTemplateSpecializationDecl(
decl().bind("x"),
hasAnyTemplateArgument(refersToType(asString("int")))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { void f(); void g(); };",
cxxRecordDecl(decl().bind("x"), hasMethod(hasName("g"))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { X() : a(1), b(2) {} double a; int b; };",
recordDecl(decl().bind("x"),
has(cxxConstructorDecl(
hasAnyConstructorInitializer(forField(hasName("b")))))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void x(int, int) { x(0, 42); }",
callExpr(expr().bind("x"), hasAnyArgument(integerLiteral(equals(42)))),
std::make_unique<VerifyIdIsBoundTo<Expr>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void x(int, int y) {}",
functionDecl(decl().bind("x"), hasAnyParameter(hasName("y"))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void x() { return; if (true) {} }",
functionDecl(decl().bind("x"),
has(compoundStmt(hasAnySubstatement(ifStmt())))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"namespace X { void b(int); void b(); }"
"using X::b;",
usingDecl(decl().bind("x"), hasAnyUsingShadowDecl(hasTargetDecl(
functionDecl(parameterCountIs(1))))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A{}; class B{}; class C : B, A {};",
cxxRecordDecl(decl().bind("x"), isDerivedFrom("::A")),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A{}; typedef A B; typedef A C; typedef A D;"
"class E : A {};",
cxxRecordDecl(decl().bind("x"), isDerivedFrom("C")),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A { class B { void f() {} }; };",
functionDecl(decl().bind("x"), hasAncestor(recordDecl(hasName("::A")))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"template <typename T> struct A { struct B {"
" void f() { if(true) {} }"
"}; };"
"void t() { A<int>::B b; b.f(); }",
ifStmt(stmt().bind("x"), hasAncestor(recordDecl(hasName("::A")))),
std::make_unique<VerifyIdIsBoundTo<Stmt>>("x", 2)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A {};",
recordDecl(hasName("::A"), decl().bind("x"), unless(hasName("fooble"))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A { A() : s(), i(42) {} const char *s; int i; };",
cxxConstructorDecl(hasName("::A::A"), decl().bind("x"),
forEachConstructorInitializer(forField(hasName("i")))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("x", 1)));
}
TEST(ForEachDescendant, BindsCorrectNodes) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class C { void f(); int i; };",
recordDecl(hasName("C"), forEachDescendant(decl().bind("decl"))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("decl", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class C { void f() {} int i; };",
recordDecl(hasName("C"), forEachDescendant(decl().bind("decl"))),
std::make_unique<VerifyIdIsBoundTo<FunctionDecl>>("decl", 1)));
}
TEST(FindAll, BindsNodeOnMatch) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A {};",
recordDecl(hasName("::A"), findAll(recordDecl(hasName("::A")).bind("v"))),
std::make_unique<VerifyIdIsBoundTo<CXXRecordDecl>>("v", 1)));
}
TEST(FindAll, BindsDescendantNodeOnMatch) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A { int a; int b; };",
recordDecl(hasName("::A"), findAll(fieldDecl().bind("v"))),
std::make_unique<VerifyIdIsBoundTo<FieldDecl>>("v", 2)));
}
TEST(FindAll, BindsNodeAndDescendantNodesOnOneMatch) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A { int a; int b; };",
recordDecl(hasName("::A"),
findAll(decl(anyOf(recordDecl(hasName("::A")).bind("v"),
fieldDecl().bind("v"))))),
std::make_unique<VerifyIdIsBoundTo<Decl>>("v", 3)));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class A { class B {}; class C {}; };",
recordDecl(hasName("::A"), findAll(recordDecl(isDefinition()).bind("v"))),
std::make_unique<VerifyIdIsBoundTo<CXXRecordDecl>>("v", 3)));
}
TEST(HasAncenstor, MatchesDeclarationAncestors) {
EXPECT_TRUE(matches(
"class A { class B { class C {}; }; };",
recordDecl(hasName("C"), hasAncestor(recordDecl(hasName("A"))))));
}
TEST(HasAncenstor, FailsIfNoAncestorMatches) {
EXPECT_TRUE(notMatches(
"class A { class B { class C {}; }; };",
recordDecl(hasName("C"), hasAncestor(recordDecl(hasName("X"))))));
}
TEST(HasAncestor, MatchesDeclarationsThatGetVisitedLater) {
EXPECT_TRUE(matches(
"class A { class B { void f() { C c; } class C {}; }; };",
varDecl(hasName("c"), hasType(recordDecl(hasName("C"),
hasAncestor(recordDecl(hasName("A"))))))));
}
TEST(HasAncenstor, MatchesStatementAncestors) {
EXPECT_TRUE(matches(
"void f() { if (true) { while (false) { 42; } } }",
integerLiteral(equals(42), hasAncestor(ifStmt()))));
}
TEST(HasAncestor, DrillsThroughDifferentHierarchies) {
EXPECT_TRUE(matches(
"void f() { if (true) { int x = 42; } }",
integerLiteral(equals(42), hasAncestor(functionDecl(hasName("f"))))));
}
TEST(HasAncestor, BindsRecursiveCombinations) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class C { class D { class E { class F { int y; }; }; }; };",
fieldDecl(hasAncestor(recordDecl(hasAncestor(recordDecl().bind("r"))))),
std::make_unique<VerifyIdIsBoundTo<CXXRecordDecl>>("r", 1)));
}
TEST(HasAncestor, BindsCombinationsWithHasDescendant) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class C { class D { class E { class F { int y; }; }; }; };",
fieldDecl(hasAncestor(
decl(
hasDescendant(recordDecl(isDefinition(),
hasAncestor(recordDecl())))
).bind("d")
)),
std::make_unique<VerifyIdIsBoundTo<CXXRecordDecl>>("d", "E")));
}
TEST(HasAncestor, MatchesClosestAncestor) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"template <typename T> struct C {"
" void f(int) {"
" struct I { void g(T) { int x; } } i; i.g(42);"
" }"
"};"
"template struct C<int>;",
varDecl(hasName("x"),
hasAncestor(functionDecl(hasParameter(
0, varDecl(hasType(asString("int"))))).bind("f"))).bind("v"),
std::make_unique<VerifyIdIsBoundTo<FunctionDecl>>("f", "g", 2)));
}
TEST(HasAncestor, MatchesInTemplateInstantiations) {
EXPECT_TRUE(matches(
"template <typename T> struct A { struct B { struct C { T t; }; }; }; "
"A<int>::B::C a;",
fieldDecl(hasType(asString("int")),
hasAncestor(recordDecl(hasName("A"))))));
}
TEST(HasAncestor, MatchesInImplicitCode) {
EXPECT_TRUE(matches(
"struct X {}; struct A { A() {} X x; };",
cxxConstructorDecl(
hasAnyConstructorInitializer(withInitializer(expr(
hasAncestor(recordDecl(hasName("A")))))))));
}
TEST(HasParent, MatchesOnlyParent) {
EXPECT_TRUE(matches(
"void f() { if (true) { int x = 42; } }",
compoundStmt(hasParent(ifStmt()))));
EXPECT_TRUE(notMatches(
"void f() { for (;;) { int x = 42; } }",
compoundStmt(hasParent(ifStmt()))));
EXPECT_TRUE(notMatches(
"void f() { if (true) for (;;) { int x = 42; } }",
compoundStmt(hasParent(ifStmt()))));
}
TEST(HasAncestor, MatchesAllAncestors) {
EXPECT_TRUE(matches(
"template <typename T> struct C { static void f() { 42; } };"
"void t() { C<int>::f(); }",
integerLiteral(
equals(42),
allOf(
hasAncestor(cxxRecordDecl(isTemplateInstantiation())),
hasAncestor(cxxRecordDecl(unless(isTemplateInstantiation())))))));
}
TEST(HasAncestor, ImplicitArrayCopyCtorDeclRefExpr) {
EXPECT_TRUE(matches("struct MyClass {\n"
" int c[1];\n"
" static MyClass Create() { return MyClass(); }\n"
"};",
declRefExpr(to(decl(hasAncestor(decl()))))));
}
TEST(HasAncestor, AnonymousUnionMemberExpr) {
EXPECT_TRUE(matches("int F() {\n"
" union { int i; };\n"
" return i;\n"
"}\n",
memberExpr(member(hasAncestor(decl())))));
EXPECT_TRUE(matches("void f() {\n"
" struct {\n"
" struct { int a; int b; };\n"
" } s;\n"
" s.a = 4;\n"
"}\n",
memberExpr(member(hasAncestor(decl())))));
EXPECT_TRUE(matches("void f() {\n"
" struct {\n"
" struct { int a; int b; };\n"
" } s;\n"
" s.a = 4;\n"
"}\n",
declRefExpr(to(decl(hasAncestor(decl()))))));
}
TEST(HasAncestor, NonParmDependentTemplateParmVarDeclRefExpr) {
EXPECT_TRUE(matches("struct PartitionAllocator {\n"
" template<typename T>\n"
" static int quantizedSize(int count) {\n"
" return count;\n"
" }\n"
" void f() { quantizedSize<int>(10); }\n"
"};",
declRefExpr(to(decl(hasAncestor(decl()))))));
}
TEST(HasAncestor, AddressOfExplicitSpecializationFunction) {
EXPECT_TRUE(matches("template <class T> void f();\n"
"template <> void f<int>();\n"
"void (*get_f())() { return f<int>; }\n",
declRefExpr(to(decl(hasAncestor(decl()))))));
}
TEST(HasParent, MatchesAllParents) {
EXPECT_TRUE(matches(
"template <typename T> struct C { static void f() { 42; } };"
"void t() { C<int>::f(); }",
integerLiteral(
equals(42),
hasParent(compoundStmt(hasParent(functionDecl(
hasParent(cxxRecordDecl(isTemplateInstantiation())))))))));
EXPECT_TRUE(
matches("template <typename T> struct C { static void f() { 42; } };"
"void t() { C<int>::f(); }",
integerLiteral(
equals(42),
hasParent(compoundStmt(hasParent(functionDecl(hasParent(
cxxRecordDecl(unless(isTemplateInstantiation()))))))))));
EXPECT_TRUE(matches(
"template <typename T> struct C { static void f() { 42; } };"
"void t() { C<int>::f(); }",
integerLiteral(equals(42),
hasParent(compoundStmt(
allOf(hasParent(functionDecl(hasParent(
cxxRecordDecl(isTemplateInstantiation())))),
hasParent(functionDecl(hasParent(cxxRecordDecl(
unless(isTemplateInstantiation())))))))))));
EXPECT_TRUE(
notMatches("template <typename T> struct C { static void f() {} };"
"void t() { C<int>::f(); }",
compoundStmt(hasParent(recordDecl()))));
}
TEST(HasParent, NoDuplicateParents) {
class HasDuplicateParents : public BoundNodesCallback {
public:
bool run(const BoundNodes *Nodes) override { return false; }
bool run(const BoundNodes *Nodes, ASTContext *Context) override {
const Stmt *Node = Nodes->getNodeAs<Stmt>("node");
std::set<const void *> Parents;
for (const auto &Parent : Context->getParents(*Node)) {
if (!Parents.insert(Parent.getMemoizationData()).second) {
return true;
}
}
return false;
}
};
EXPECT_FALSE(matchAndVerifyResultTrue(
"template <typename T> int Foo() { return 1 + 2; }\n"
"int x = Foo<int>() + Foo<unsigned>();",
stmt().bind("node"), std::make_unique<HasDuplicateParents>()));
}
TEST(TypeMatching, PointeeTypes) {
EXPECT_TRUE(matches("int b; int &a = b;",
referenceType(pointee(builtinType()))));
EXPECT_TRUE(matches("int *a;", pointerType(pointee(builtinType()))));
EXPECT_TRUE(matches("int *a;",
loc(pointerType(pointee(builtinType())))));
EXPECT_TRUE(matches(
"int const *A;",
pointerType(pointee(isConstQualified(), builtinType()))));
EXPECT_TRUE(notMatches(
"int *A;",
pointerType(pointee(isConstQualified(), builtinType()))));
}
TEST(ElaboratedTypeNarrowing, hasQualifier) {
EXPECT_TRUE(matches(
"namespace N {"
" namespace M {"
" class D {};"
" }"
"}"
"N::M::D d;",
elaboratedType(hasQualifier(hasPrefix(specifiesNamespace(hasName("N")))))));
EXPECT_TRUE(notMatches(
"namespace M {"
" class D {};"
"}"
"M::D d;",
elaboratedType(hasQualifier(hasPrefix(specifiesNamespace(hasName("N")))))));
EXPECT_TRUE(notMatches(
"struct D {"
"} d;",
elaboratedType(hasQualifier(nestedNameSpecifier()))));
}
TEST(ElaboratedTypeNarrowing, namesType) {
EXPECT_TRUE(matches(
"namespace N {"
" namespace M {"
" class D {};"
" }"
"}"
"N::M::D d;",
elaboratedType(elaboratedType(namesType(recordType(
hasDeclaration(namedDecl(hasName("D")))))))));
EXPECT_TRUE(notMatches(
"namespace M {"
" class D {};"
"}"
"M::D d;",
elaboratedType(elaboratedType(namesType(typedefType())))));
}
TEST(NNS, BindsNestedNameSpecifiers) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"namespace ns { struct E { struct B {}; }; } ns::E::B b;",
nestedNameSpecifier(specifiesType(asString("struct ns::E"))).bind("nns"),
std::make_unique<VerifyIdIsBoundTo<NestedNameSpecifier>>(
"nns", "ns::struct E::")));
}
TEST(NNS, BindsNestedNameSpecifierLocs) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"namespace ns { struct B {}; } ns::B b;",
loc(nestedNameSpecifier()).bind("loc"),
std::make_unique<VerifyIdIsBoundTo<NestedNameSpecifierLoc>>("loc", 1)));
}
TEST(NNS, DescendantsOfNestedNameSpecifiers) {
std::string Fragment =
"namespace a { struct A { struct B { struct C {}; }; }; };"
"void f() { a::A::B::C c; }";
EXPECT_TRUE(matches(
Fragment,
nestedNameSpecifier(specifiesType(asString("struct a::A::B")),
hasDescendant(nestedNameSpecifier(
specifiesNamespace(hasName("a")))))));
EXPECT_TRUE(notMatches(
Fragment,
nestedNameSpecifier(specifiesType(asString("struct a::A::B")),
has(nestedNameSpecifier(
specifiesNamespace(hasName("a")))))));
EXPECT_TRUE(matches(
Fragment,
nestedNameSpecifier(specifiesType(asString("struct a::A")),
has(nestedNameSpecifier(
specifiesNamespace(hasName("a")))))));
// Not really useful because a NestedNameSpecifier can af at most one child,
// but to complete the interface.
EXPECT_TRUE(matchAndVerifyResultTrue(
Fragment,
nestedNameSpecifier(specifiesType(asString("struct a::A::B")),
forEach(nestedNameSpecifier().bind("x"))),
std::make_unique<VerifyIdIsBoundTo<NestedNameSpecifier>>("x", 1)));
}
TEST(NNS, NestedNameSpecifiersAsDescendants) {
std::string Fragment =
"namespace a { struct A { struct B { struct C {}; }; }; };"
"void f() { a::A::B::C c; }";
EXPECT_TRUE(matches(
Fragment,
decl(hasDescendant(nestedNameSpecifier(specifiesType(
asString("struct a::A")))))));
EXPECT_TRUE(matchAndVerifyResultTrue(
Fragment,
functionDecl(hasName("f"),
forEachDescendant(nestedNameSpecifier().bind("x"))),
// Nested names: a, a::A and a::A::B.
std::make_unique<VerifyIdIsBoundTo<NestedNameSpecifier>>("x", 3)));
}
TEST(NNSLoc, DescendantsOfNestedNameSpecifierLocs) {
std::string Fragment =
"namespace a { struct A { struct B { struct C {}; }; }; };"
"void f() { a::A::B::C c; }";
EXPECT_TRUE(matches(
Fragment,
nestedNameSpecifierLoc(loc(specifiesType(asString("struct a::A::B"))),
hasDescendant(loc(nestedNameSpecifier(
specifiesNamespace(hasName("a"))))))));
EXPECT_TRUE(notMatches(
Fragment,
nestedNameSpecifierLoc(loc(specifiesType(asString("struct a::A::B"))),
has(loc(nestedNameSpecifier(
specifiesNamespace(hasName("a"))))))));
EXPECT_TRUE(matches(
Fragment,
nestedNameSpecifierLoc(loc(specifiesType(asString("struct a::A"))),
has(loc(nestedNameSpecifier(
specifiesNamespace(hasName("a"))))))));
EXPECT_TRUE(matchAndVerifyResultTrue(
Fragment,
nestedNameSpecifierLoc(loc(specifiesType(asString("struct a::A::B"))),
forEach(nestedNameSpecifierLoc().bind("x"))),
std::make_unique<VerifyIdIsBoundTo<NestedNameSpecifierLoc>>("x", 1)));
}
TEST(NNSLoc, NestedNameSpecifierLocsAsDescendants) {
std::string Fragment =
"namespace a { struct A { struct B { struct C {}; }; }; };"
"void f() { a::A::B::C c; }";
EXPECT_TRUE(matches(
Fragment,
decl(hasDescendant(loc(nestedNameSpecifier(specifiesType(
asString("struct a::A"))))))));
EXPECT_TRUE(matchAndVerifyResultTrue(
Fragment,
functionDecl(hasName("f"),
forEachDescendant(nestedNameSpecifierLoc().bind("x"))),
// Nested names: a, a::A and a::A::B.
std::make_unique<VerifyIdIsBoundTo<NestedNameSpecifierLoc>>("x", 3)));
}
template <typename T> class VerifyMatchOnNode : public BoundNodesCallback {
public:
VerifyMatchOnNode(StringRef Id, const internal::Matcher<T> &InnerMatcher,
StringRef InnerId)
: Id(Id), InnerMatcher(InnerMatcher), InnerId(InnerId) {
}
bool run(const BoundNodes *Nodes) override { return false; }
bool run(const BoundNodes *Nodes, ASTContext *Context) override {
const T *Node = Nodes->getNodeAs<T>(Id);
return selectFirst<T>(InnerId, match(InnerMatcher, *Node, *Context)) !=
nullptr;
}
private:
std::string Id;
internal::Matcher<T> InnerMatcher;
std::string InnerId;
};
TEST(MatchFinder, CanMatchDeclarationsRecursively) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { class Y {}; };", recordDecl(hasName("::X")).bind("X"),
std::make_unique<VerifyMatchOnNode<Decl>>(
"X", decl(hasDescendant(recordDecl(hasName("X::Y")).bind("Y"))),
"Y")));
EXPECT_TRUE(matchAndVerifyResultFalse(
"class X { class Y {}; };", recordDecl(hasName("::X")).bind("X"),
std::make_unique<VerifyMatchOnNode<Decl>>(
"X", decl(hasDescendant(recordDecl(hasName("X::Z")).bind("Z"))),
"Z")));
}
TEST(MatchFinder, CanMatchStatementsRecursively) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f() { if (1) { for (;;) { } } }", ifStmt().bind("if"),
std::make_unique<VerifyMatchOnNode<Stmt>>(
"if", stmt(hasDescendant(forStmt().bind("for"))), "for")));
EXPECT_TRUE(matchAndVerifyResultFalse(
"void f() { if (1) { for (;;) { } } }", ifStmt().bind("if"),
std::make_unique<VerifyMatchOnNode<Stmt>>(
"if", stmt(hasDescendant(declStmt().bind("decl"))), "decl")));
}
TEST(MatchFinder, CanMatchSingleNodesRecursively) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { class Y {}; };", recordDecl(hasName("::X")).bind("X"),
std::make_unique<VerifyMatchOnNode<Decl>>(
"X", recordDecl(has(recordDecl(hasName("X::Y")).bind("Y"))), "Y")));
EXPECT_TRUE(matchAndVerifyResultFalse(
"class X { class Y {}; };", recordDecl(hasName("::X")).bind("X"),
std::make_unique<VerifyMatchOnNode<Decl>>(
"X", recordDecl(has(recordDecl(hasName("X::Z")).bind("Z"))), "Z")));
}
TEST(StatementMatcher, HasReturnValue) {
StatementMatcher RetVal = returnStmt(hasReturnValue(binaryOperator()));
EXPECT_TRUE(matches("int F() { int a, b; return a + b; }", RetVal));
EXPECT_FALSE(matches("int F() { int a; return a; }", RetVal));
EXPECT_FALSE(matches("void F() { return; }", RetVal));
}
TEST(StatementMatcher, ForFunction) {
const auto CppString1 =
"struct PosVec {"
" PosVec& operator=(const PosVec&) {"
" auto x = [] { return 1; };"
" return *this;"
" }"
"};";
const auto CppString2 =
"void F() {"
" struct S {"
" void F2() {"
" return;"
" }"
" };"
"}";
EXPECT_TRUE(
matches(
CppString1,
returnStmt(forFunction(hasName("operator=")),
has(unaryOperator(hasOperatorName("*"))))));
EXPECT_TRUE(
notMatches(
CppString1,
returnStmt(forFunction(hasName("operator=")),
has(integerLiteral()))));
EXPECT_TRUE(
matches(
CppString1,
returnStmt(forFunction(hasName("operator()")),
has(integerLiteral()))));
EXPECT_TRUE(matches(CppString2, returnStmt(forFunction(hasName("F2")))));
EXPECT_TRUE(notMatches(CppString2, returnStmt(forFunction(hasName("F")))));
}
TEST(Matcher, ForEachOverriden) {
const auto ForEachOverriddenInClass = [](const char *ClassName) {
return cxxMethodDecl(ofClass(hasName(ClassName)), isVirtual(),
forEachOverridden(cxxMethodDecl().bind("overridden")))
.bind("override");
};
static const char Code1[] = "class A { virtual void f(); };"
"class B : public A { void f(); };"
"class C : public B { void f(); };";
// C::f overrides A::f.
EXPECT_TRUE(matchAndVerifyResultTrue(
Code1, ForEachOverriddenInClass("C"),
std::make_unique<VerifyIdIsBoundTo<CXXMethodDecl>>("override", "f", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
Code1, ForEachOverriddenInClass("C"),
std::make_unique<VerifyIdIsBoundTo<CXXMethodDecl>>("overridden", "f",
1)));
// B::f overrides A::f.
EXPECT_TRUE(matchAndVerifyResultTrue(
Code1, ForEachOverriddenInClass("B"),
std::make_unique<VerifyIdIsBoundTo<CXXMethodDecl>>("override", "f", 1)));
EXPECT_TRUE(matchAndVerifyResultTrue(
Code1, ForEachOverriddenInClass("B"),
std::make_unique<VerifyIdIsBoundTo<CXXMethodDecl>>("overridden", "f",
1)));
// A::f overrides nothing.
EXPECT_TRUE(notMatches(Code1, ForEachOverriddenInClass("A")));
static const char Code2[] =
"class A1 { virtual void f(); };"
"class A2 { virtual void f(); };"
"class B : public A1, public A2 { void f(); };";
// B::f overrides A1::f and A2::f. This produces two matches.
EXPECT_TRUE(matchAndVerifyResultTrue(
Code2, ForEachOverriddenInClass("B"),
std::make_unique<VerifyIdIsBoundTo<CXXMethodDecl>>("override", "f", 2)));
EXPECT_TRUE(matchAndVerifyResultTrue(
Code2, ForEachOverriddenInClass("B"),
std::make_unique<VerifyIdIsBoundTo<CXXMethodDecl>>("overridden", "f",
2)));
// A1::f overrides nothing.
EXPECT_TRUE(notMatches(Code2, ForEachOverriddenInClass("A1")));
}
TEST(Matcher, HasAnyDeclaration) {
std::string Fragment = "void foo(int p1);"
"void foo(int *p2);"
"void bar(int p3);"
"template <typename T> void baz(T t) { foo(t); }";
EXPECT_TRUE(
matches(Fragment, unresolvedLookupExpr(hasAnyDeclaration(functionDecl(
hasParameter(0, parmVarDecl(hasName("p1"))))))));
EXPECT_TRUE(
matches(Fragment, unresolvedLookupExpr(hasAnyDeclaration(functionDecl(
hasParameter(0, parmVarDecl(hasName("p2"))))))));
EXPECT_TRUE(
notMatches(Fragment, unresolvedLookupExpr(hasAnyDeclaration(functionDecl(
hasParameter(0, parmVarDecl(hasName("p3"))))))));
EXPECT_TRUE(notMatches(Fragment, unresolvedLookupExpr(hasAnyDeclaration(
functionDecl(hasName("bar"))))));
}
TEST(SubstTemplateTypeParmType, HasReplacementType) {
std::string Fragment = "template<typename T>"
"double F(T t);"
"int i;"
"double j = F(i);";
EXPECT_TRUE(matches(Fragment, substTemplateTypeParmType(hasReplacementType(
qualType(asString("int"))))));
EXPECT_TRUE(notMatches(Fragment, substTemplateTypeParmType(hasReplacementType(
qualType(asString("double"))))));
EXPECT_TRUE(
notMatches("template<int N>"
"double F();"
"double j = F<5>();",
substTemplateTypeParmType(hasReplacementType(qualType()))));
}
TEST(ClassTemplateSpecializationDecl, HasSpecializedTemplate) {
auto Matcher = classTemplateSpecializationDecl(
hasSpecializedTemplate(classTemplateDecl()));
EXPECT_TRUE(
matches("template<typename T> class A {}; typedef A<int> B;", Matcher));
EXPECT_TRUE(notMatches("template<typename T> class A {};", Matcher));
}
TEST(CXXNewExpr, Array) {
StatementMatcher NewArray = cxxNewExpr(isArray());
EXPECT_TRUE(matches("void foo() { int *Ptr = new int[10]; }", NewArray));
EXPECT_TRUE(notMatches("void foo() { int *Ptr = new int; }", NewArray));
StatementMatcher NewArraySize10 =
cxxNewExpr(hasArraySize(integerLiteral(equals(10))));
EXPECT_TRUE(
matches("void foo() { int *Ptr = new int[10]; }", NewArraySize10));
EXPECT_TRUE(
notMatches("void foo() { int *Ptr = new int[20]; }", NewArraySize10));
}
TEST(CXXNewExpr, PlacementArgs) {
StatementMatcher IsPlacementNew = cxxNewExpr(hasAnyPlacementArg(anything()));
EXPECT_TRUE(matches(R"(
void* operator new(decltype(sizeof(void*)), void*);
int *foo(void* Storage) {
return new (Storage) int;
})",
IsPlacementNew));
EXPECT_TRUE(matches(R"(
void* operator new(decltype(sizeof(void*)), void*, unsigned);
int *foo(void* Storage) {
return new (Storage, 16) int;
})",
cxxNewExpr(hasPlacementArg(
1, ignoringImpCasts(integerLiteral(equals(16)))))));
EXPECT_TRUE(notMatches(R"(
void* operator new(decltype(sizeof(void*)), void*);
int *foo(void* Storage) {
return new int;
})",
IsPlacementNew));
}
} // namespace ast_matchers
} // namespace clang
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