path: root/include/clang/Parse/Parser.h

//===--- Parser.h - C Language Parser ---------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file defines the Parser interface.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_PARSE_PARSER_H
#define LLVM_CLANG_PARSE_PARSER_H

#include "clang/Lex/Preprocessor.h"
#include "clang/Parse/AccessSpecifier.h"
#include "clang/Parse/Action.h"
#include "clang/Parse/DeclSpec.h"
#include "llvm/ADT/OwningPtr.h"
#include <stack>
#include <list>

namespace clang {
  class AttributeList;
  class PragmaHandler;
  class Scope;
  class DiagnosticBuilder;
  class Parser;
  class PragmaUnusedHandler;

/// PrettyStackTraceParserEntry - If a crash happens while the parser is active,
/// an entry is printed for it.
class PrettyStackTraceParserEntry : public llvm::PrettyStackTraceEntry {
  const Parser &P;
public:
  PrettyStackTraceParserEntry(const Parser &p) : P(p) {}
  virtual void print(llvm::raw_ostream &OS) const;
};


/// Parser - This implements a parser for the C family of languages.  After
/// parsing units of the grammar, productions are invoked to handle whatever has
/// been read.
///
class Parser {
  friend class PragmaUnusedHandler;
  PrettyStackTraceParserEntry CrashInfo;

  Preprocessor &PP;

  /// Tok - The current token we are peeking ahead.  All parsing methods assume
  /// that this is valid.
  Token Tok;

  // PrevTokLocation - The location of the token we previously
  // consumed. This token is used for diagnostics where we expected to
  // see a token following another token (e.g., the ';' at the end of
  // a statement).
  SourceLocation PrevTokLocation;

  unsigned short ParenCount, BracketCount, BraceCount;

  /// Actions - These are the callbacks we invoke as we parse various constructs
  /// in the file.  This refers to the common base class between MinimalActions
  /// and SemaActions for those uses that don't matter.
  Action &Actions;

  Scope *CurScope;
  Diagnostic &Diags;

  /// ScopeCache - Cache scopes to reduce malloc traffic.
  enum { ScopeCacheSize = 16 };
  unsigned NumCachedScopes;
  Scope *ScopeCache[ScopeCacheSize];

  /// Ident_super - IdentifierInfo for "super", to support fast
  /// comparison.
  IdentifierInfo *Ident_super;

  llvm