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//===--- ParseAST.cpp - Provide the clang::ParseAST method ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the clang::ParseAST method.
//
//===----------------------------------------------------------------------===//
#include "clang/Sema/ParseAST.h"
#include "Sema.h"
#include "clang/Sema/CodeCompleteConsumer.h"
#include "clang/Sema/SemaConsumer.h"
#include "clang/Sema/ExternalSemaSource.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ExternalASTSource.h"
#include "clang/AST/Stmt.h"
#include "clang/Parse/Parser.h"
#include <cstdio>
using namespace clang;
//===----------------------------------------------------------------------===//
// Public interface to the file
//===----------------------------------------------------------------------===//
/// ParseAST - Parse the entire file specified, notifying the ASTConsumer as
/// the file is parsed. This inserts the parsed decls into the translation unit
/// held by Ctx.
///
void clang::ParseAST(Preprocessor &PP, ASTConsumer *Consumer,
ASTContext &Ctx, bool PrintStats,
bool CompleteTranslationUnit,
CodeCompleteConsumer *CompletionConsumer) {
// Collect global stats on Decls/Stmts (until we have a module streamer).
if (PrintStats) {
Decl::CollectingStats(true);
Stmt::CollectingStats(true);
}
Sema S(PP, Ctx, *Consumer, CompleteTranslationUnit, CompletionConsumer);
Parser P(PP, S);
if (PP.EnterMainSourceFile())
return;
// Initialize the parser.
P.Initialize();
Consumer->Initialize(Ctx);
if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumer))
SC->InitializeSema(S);
if (ExternalASTSource *External = Ctx.getExternalSource()) {
if (ExternalSemaSource *ExternalSema =
dyn_cast<ExternalSemaSource>(External))
ExternalSema->InitializeSema(S);
External->StartTranslationUnit(Consumer);
}
Parser::DeclGroupPtrTy ADecl;
while (!P.ParseTopLevelDecl(ADecl)) { // Not end of file.
// If we got a null return and something *was* parsed, ignore it. This
// is due to a top-level semicolon, an action override, or a parse error
// skipping something.
if (ADecl)
Consumer->HandleTopLevelDecl(ADecl.getAsVal<DeclGroupRef>());
};
// Check for any pending objective-c implementation decl.
while ((ADecl = P.RetrievePendingObjCImpDecl()))
Consumer->HandleTopLevelDecl(ADecl.getAsVal<DeclGroupRef>());
// Process any TopLevelDecls generated by #pragma weak.
for (llvm::SmallVector<Decl*,2>::iterator
I = S.WeakTopLevelDecls().begin(),
E = S.WeakTopLevelDecls().end(); I != E; ++I)
Consumer->HandleTopLevelDecl(DeclGroupRef(*I));
Consumer->HandleTranslationUnit(Ctx);
if (ExternalSemaSource *ESS =
dyn_cast_or_null<ExternalSemaSource>(Ctx.getExternalSource()))
ESS->ForgetSema();
if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumer))
SC->ForgetSema();
if (PrintStats) {
fprintf(stderr, "\nSTATISTICS:\n");
P.getActions().PrintStats();
Ctx.PrintStats();
Decl::PrintStats();
Stmt::PrintStats();
Consumer->PrintStats();
}
}
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