ParseAST.cpp revision 2b5289b6fd7e3d9899868410a498c081c9595662 
1//===--- ParseAST.cpp - Provide the clang::ParseAST method ----------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the clang::ParseAST method.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/Parse/ParseAST.h"
15#include "clang/Sema/Sema.h"
16#include "clang/Sema/CodeCompleteConsumer.h"
17#include "clang/Sema/SemaConsumer.h"
18#include "clang/Sema/ExternalSemaSource.h"
19#include "clang/AST/ASTConsumer.h"
20#include "clang/AST/ExternalASTSource.h"
21#include "clang/AST/Stmt.h"
22#include "clang/Parse/Parser.h"
23#include <cstdio>
24
25using namespace clang;
26
27static void DumpRecordLayouts(ASTContext &C) {
28  for (ASTContext::type_iterator I = C.types_begin(), E = C.types_end();
29       I != E; ++I) {
30    const RecordType *RT = dyn_cast<RecordType>(*I);
31    if (!RT)
32      continue;
33
34    const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl());
35    if (!RD || RD->isImplicit() || RD->isDependentType() ||
36        RD->isInvalidDecl() || !RD->getDefinition())
37      continue;
38
39    // FIXME: Do we really need to hard code this?
40    if (RD->getQualifiedNameAsString() == "__va_list_tag")
41      continue;
42
43    C.DumpRecordLayout(RD, llvm::errs());
44  }
45}
46
47//===----------------------------------------------------------------------===//
48// Public interface to the file
49//===----------------------------------------------------------------------===//
50
51/// ParseAST - Parse the entire file specified, notifying the ASTConsumer as
52/// the file is parsed.  This inserts the parsed decls into the translation unit
53/// held by Ctx.
54///
55void clang::ParseAST(Preprocessor &PP, ASTConsumer *Consumer,
56                     ASTContext &Ctx, bool PrintStats,
57                     bool CompleteTranslationUnit,
58                     CodeCompleteConsumer *CompletionConsumer) {
59  Sema S(PP, Ctx, *Consumer, CompleteTranslationUnit, CompletionConsumer);
60  ParseAST(S, PrintStats);
61}
62
63void clang::ParseAST(Sema &S, bool PrintStats) {
64  // Collect global stats on Decls/Stmts (until we have a module streamer).
65  if (PrintStats) {
66    Decl::CollectingStats(true);
67    Stmt::CollectingStats(true);
68  }
69
70  ASTConsumer *Consumer = &S.getASTConsumer();
71
72  Parser P(S.getPreprocessor(), S);
73  S.getPreprocessor().EnterMainSourceFile();
74  P.Initialize();
75  S.Initialize();
76
77  if (ExternalASTSource *External = S.getASTContext().getExternalSource())
78    External->StartTranslationUnit(Consumer);
79
80  Parser::DeclGroupPtrTy ADecl;
81
82  while (!P.ParseTopLevelDecl(ADecl)) {  // Not end of file.
83    // If we got a null return and something *was* parsed, ignore it.  This
84    // is due to a top-level semicolon, an action override, or a parse error
85    // skipping something.
86    if (ADecl)
87      Consumer->HandleTopLevelDecl(ADecl.get());
88  };
89  // Check for any pending objective-c implementation decl.
90  while ((ADecl = P.FinishPendingObjCActions()))
91    Consumer->HandleTopLevelDecl(ADecl.get());
92
93  // Process any TopLevelDecls generated by #pragma weak.
94  for (llvm::SmallVector<Decl*,2>::iterator
95       I = S.WeakTopLevelDecls().begin(),
96       E = S.WeakTopLevelDecls().end(); I != E; ++I)
97    Consumer->HandleTopLevelDecl(DeclGroupRef(*I));
98
99  // Dump record layouts, if requested.
100  if (S.getLangOptions().DumpRecordLayouts)
101    DumpRecordLayouts(S.getASTContext());
102
103  Consumer->HandleTranslationUnit(S.getASTContext());
104
105  if (PrintStats) {
106    fprintf(stderr, "\nSTATISTICS:\n");
107    P.getActions().PrintStats();
108    S.getASTContext().PrintStats();
109    Decl::PrintStats();
110    Stmt::PrintStats();
111    Consumer->PrintStats();
112  }
113}
114