llvm/flang/lib/semantics/check-arithmeticif.cc
2019-03-27 20:46:51 -07:00

51 lines
2.1 KiB
C++

// Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "check-arithmeticif.h"
#include "tools.h"
#include "../parser/message.h"
#include "../parser/parse-tree.h"
namespace Fortran::semantics {
bool IsNumericExpr(const evaluate::GenericExprWrapper &expr) {
auto dynamicType{expr.v.GetType()};
return dynamicType.has_value() &&
common::IsNumericTypeCategory(dynamicType->category);
}
void ArithmeticIfStmtChecker::Leave(
const parser::ArithmeticIfStmt &arithmeticIfStmt) {
// Arithmetic IF statements have been removed from Fortran 2018.
// The constraints and requirements here refer to the 2008 spec.
// R853 Check for a scalar-numeric-expr
// C849 that shall not be of type complex.
auto &expr{std::get<parser::Expr>(arithmeticIfStmt.t)};
if (expr.typedExpr->v.Rank() > 0) {
context_.messages().Say(expr.source,
"ARITHMETIC IF expression must be a scalar expression"_err_en_US);
} else if (ExprHasTypeCategory(
*expr.typedExpr, common::TypeCategory::Complex)) {
context_.messages().Say(expr.source,
"ARITHMETIC IF expression must not be a COMPLEX expression"_err_en_US);
} else if (!IsNumericExpr(*expr.typedExpr)) {
context_.messages().Say(expr.source,
"ARITHMETIC IF expression must be a numeric expression"_err_en_US);
}
// The labels have already been checked in resolve-labels.
// TODO: Really? Check that they are really branch target
// statements and in the same inclusive scope.
}
} // namespace Fortran::semantics