7f66c0ae72
Replace `namespace Fortran { namespace parser { ... } }` with
`namespace Fortran::parser { ... }` and similarly for semantics.
Original-commit: flang-compiler/f18@838c9539b2
Reviewed-on: https://github.com/flang-compiler/f18/pull/77
Tree-same-pre-rewrite: false
102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
// Copyright (c) 2018, 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.
|
|
|
|
#ifndef FORTRAN_PARSER_PREPROCESSOR_H_
|
|
#define FORTRAN_PARSER_PREPROCESSOR_H_
|
|
|
|
// A Fortran-aware preprocessing module used by the prescanner to implement
|
|
// preprocessing directives and macro replacement. Intended to be efficient
|
|
// enough to always run on all source files even when no preprocessing is
|
|
// performed, so that special compiler command options &/or source file name
|
|
// extensions for preprocessing will not be necessary.
|
|
|
|
#include "char-block.h"
|
|
#include "provenance.h"
|
|
#include "token-sequence.h"
|
|
#include <cstddef>
|
|
#include <list>
|
|
#include <stack>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
#include <vector>
|
|
|
|
namespace Fortran::parser {
|
|
|
|
class Prescanner;
|
|
|
|
// Defines a macro
|
|
class Definition {
|
|
public:
|
|
Definition(const TokenSequence &, std::size_t firstToken, std::size_t tokens);
|
|
Definition(const std::vector<std::string> &argNames, const TokenSequence &,
|
|
std::size_t firstToken, std::size_t tokens, bool isVariadic = false);
|
|
Definition(const std::string &predefined, AllSources &);
|
|
|
|
bool isFunctionLike() const { return isFunctionLike_; }
|
|
std::size_t argumentCount() const { return argumentCount_; }
|
|
bool isVariadic() const { return isVariadic_; }
|
|
bool isDisabled() const { return isDisabled_; }
|
|
bool isPredefined() const { return isPredefined_; }
|
|
const TokenSequence &replacement() const { return replacement_; }
|
|
|
|
bool set_isDisabled(bool disable);
|
|
|
|
TokenSequence Apply(const std::vector<TokenSequence> &args, AllSources &);
|
|
|
|
private:
|
|
static TokenSequence Tokenize(const std::vector<std::string> &argNames,
|
|
const TokenSequence &token, std::size_t firstToken, std::size_t tokens);
|
|
|
|
bool isFunctionLike_{false};
|
|
std::size_t argumentCount_{0};
|
|
bool isVariadic_{false};
|
|
bool isDisabled_{false};
|
|
bool isPredefined_{false};
|
|
TokenSequence replacement_;
|
|
};
|
|
|
|
// Preprocessing state
|
|
class Preprocessor {
|
|
public:
|
|
explicit Preprocessor(AllSources &);
|
|
|
|
void Define(std::string macro, std::string value);
|
|
void Undefine(std::string macro);
|
|
|
|
std::optional<TokenSequence> MacroReplacement(
|
|
const TokenSequence &, const Prescanner &);
|
|
|
|
// Implements a preprocessor directive.
|
|
void Directive(const TokenSequence &, Prescanner *);
|
|
|
|
private:
|
|
enum class IsElseActive { No, Yes };
|
|
enum class CanDeadElseAppear { No, Yes };
|
|
|
|
CharBlock SaveTokenAsName(const CharBlock &);
|
|
bool IsNameDefined(const CharBlock &);
|
|
TokenSequence ReplaceMacros(const TokenSequence &, const Prescanner &);
|
|
void SkipDisabledConditionalCode(
|
|
const std::string &, IsElseActive, Prescanner *, ProvenanceRange);
|
|
bool IsIfPredicateTrue(const TokenSequence &expr, std::size_t first,
|
|
std::size_t exprTokens, Prescanner *);
|
|
|
|
AllSources &allSources_;
|
|
std::list<std::string> names_;
|
|
std::unordered_map<CharBlock, Definition> definitions_;
|
|
std::stack<CanDeadElseAppear> ifStack_;
|
|
};
|
|
|
|
} // namespace Fortran::parser
|
|
#endif // FORTRAN_PARSER_PREPROCESSOR_H_
|