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// 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.
#include "parsing.h"
#include "grammar.h"
#include "instrumented-parser.h"
#include "message.h"
#include "openmp-grammar.h"
#include "preprocessor.h"
#include "prescan.h"
#include "provenance.h"
#include "source.h"
#include <sstream>
namespace Fortran::parser {
Parsing::Parsing() {}
Parsing::Parsing(AllSources &s) : cooked_{s} {}
Parsing::~Parsing() {}
void Parsing::Prescan(const std::string &path, Options options) {
options_ = options;
std::stringstream fileError;
const SourceFile *sourceFile;
AllSources &allSources{cooked_.allSources()};
if (path == "-") {
sourceFile = allSources.ReadStandardInput(&fileError);
} else {
sourceFile = allSources.Open(path, &fileError);
}
if (sourceFile == nullptr) {
ProvenanceRange range{allSources.AddCompilerInsertion(path)};
messages_.Say(range, "%s"_err_en_US, fileError.str().data());
return;
}
if (sourceFile->bytes() == 0) {
ProvenanceRange range{allSources.AddCompilerInsertion(path)};
messages_.Say(range, "file is empty"_err_en_US);
return;
}
// N.B. Be sure to not push the search directory paths until the primary
// source file has been opened. If foo.f is missing from the current
// working directory, we don't want to accidentally read another foo.f
// from another directory that's on the search path.
for (const auto &path : options.searchDirectories) {
allSources.PushSearchPathDirectory(path);
}
Preprocessor preprocessor{allSources};
for (const auto &predef : options.predefinitions) {
if (predef.second.has_value()) {
preprocessor.Define(predef.first, *predef.second);
} else {
preprocessor.Undefine(predef.first);
}
}
Prescanner prescanner{messages_, cooked_, preprocessor, options.features};
prescanner.set_fixedForm(options.isFixedForm)
.set_fixedFormColumnLimit(options.fixedFormColumns)
.set_encoding(options.encoding)
.AddCompilerDirectiveSentinel("dir$");
if (options.features.IsEnabled(LanguageFeature::OpenMP)) {
prescanner.AddCompilerDirectiveSentinel("$omp");
prescanner.AddCompilerDirectiveSentinel("$"); // OMP conditional line
}
ProvenanceRange range{allSources.AddIncludedFile(
*sourceFile, ProvenanceRange{}, options.isModuleFile)};
prescanner.Prescan(range);
cooked_.Marshal();
}
void Parsing::DumpCookedChars(std::ostream &out) const {
UserState userState{cooked_, LanguageFeatureControl{}};
ParseState parseState{cooked_};
parseState.set_inFixedForm(options_.isFixedForm).set_userState(&userState);
while (std::optional<const char *> p{parseState.GetNextChar()}) {
out << **p;
}
}
void Parsing::DumpProvenance(std::ostream &out) const { cooked_.Dump(out); }
void Parsing::DumpParsingLog(std::ostream &out) const {
log_.Dump(out, cooked_);
}
void Parsing::Parse(std::ostream *out) {
UserState userState{cooked_, options_.features};
userState.set_debugOutput(out)
.set_instrumentedParse(options_.instrumentedParse)
.set_log(&log_);
ParseState parseState{cooked_};
parseState.set_inFixedForm(options_.isFixedForm)
.set_encoding(options_.encoding)
.set_userState(&userState);
parseTree_ = program.Parse(parseState);
CHECK(
!parseState.anyErrorRecovery() || parseState.messages().AnyFatalError());
consumedWholeFile_ = parseState.IsAtEnd();
messages_.Annex(std::move(parseState.messages()));
finalRestingPlace_ = parseState.GetLocation();
}
void Parsing::ClearLog() { log_.clear(); }
bool Parsing::ForTesting(std::string path, std::ostream &err) {
Prescan(path, Options{});
if (messages_.AnyFatalError()) {
messages_.Emit(err, cooked_);
err << "could not scan " << path << '\n';
return false;
}
Parse();
messages_.Emit(err, cooked_);
if (!consumedWholeFile_) {
EmitMessage(err, finalRestingPlace_, "parser FAIL; final position");
return false;
}
if (messages_.AnyFatalError() || !parseTree_.has_value()) {
err << "could not parse " << path << '\n';
return false;
}
return true;
}
} // namespace Fortran::parser
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