path: root/Parse/ParseObjc.cpp

//===--- ParseObjc.cpp - Objective C Parsing ------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file was developed by Steve Naroff and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file implements the Objective-C portions of the Parser interface.
//
//===----------------------------------------------------------------------===//

#include "clang/Parse/Parser.h"
#include "clang/Parse/DeclSpec.h"
#include "clang/Basic/Diagnostic.h"
#include "llvm/ADT/SmallVector.h"
using namespace clang;


/// ParseExternalDeclaration:
///       external-declaration: [C99 6.9]
/// [OBJC]  objc-class-definition
/// [OBJC]  objc-class-declaration     [TODO]
/// [OBJC]  objc-alias-declaration     [TODO]
/// [OBJC]  objc-protocol-definition   [TODO]
/// [OBJC]  objc-method-definition     [TODO]
/// [OBJC]  '@' 'end'                  [TODO]
Parser::DeclTy *Parser::ParseObjCAtDirectives() {
  SourceLocation AtLoc = ConsumeToken(); // the "@"
  
  switch (Tok.getObjCKeywordID()) {
    case tok::objc_class:
      return ParseObjCAtClassDeclaration(AtLoc);
    case tok::objc_interface:
      return ParseObjCAtInterfaceDeclaration(AtLoc);
    case tok::objc_protocol:
      return ParseObjCAtProtocolDeclaration(AtLoc);
    case tok::objc_implementation:
      return ObjcImpDecl = ParseObjCAtImplementationDeclaration(AtLoc);
    case tok::objc_end:
      return ParseObjCAtEndDeclaration(AtLoc);
    case tok::objc_compatibility_alias:
      return ParseObjCAtAliasDeclaration(AtLoc);
    case tok::objc_synthesize:
      return ParseObjCPropertySynthesize(AtLoc);
    case tok::objc_dynamic:
      return ParseObjCPropertyDynamic(AtLoc);
    default:
      Diag(AtLoc, diag::err_unexpected_at);
      SkipUntil(tok::semi);
      return 0;
  }
}

///
/// objc-class-declaration: 
///    '@' 'class' identifier-list ';'
///  
Parser::DeclTy *Parser::ParseObjCAtClassDeclaration(SourceLocation atLoc) {
  ConsumeToken(); // the identifier "class"
  llvm::SmallVector<IdentifierInfo *, 8> ClassNames;
  
  while (1) {
    if (Tok.getKind() != tok::identifier) {
      Diag(Tok, diag::err_expected_ident);
      SkipUntil(tok::semi);
      return 0;
    }
    ClassNames.push_back(Tok.getIdentifierInfo());
    ConsumeToken();
    
    if (Tok.getKind() != tok::comma)
      break;
    
    ConsumeToken();
  }
  
  // Consume the ';'.
  if (ExpectAndConsume(tok::semi, diag::err_expected_semi_after, "@class"))
    return 0;
  
  return Actions.ObjcClassDeclaration(CurScope, atLoc,
                                      &ClassNames[0], ClassNames.size());
}

///
///   objc-interface:
///     objc-class-interface-attributes[opt] objc-class-interface
///     objc-category-interface
///
///   objc-class-interface:
///     '@' 'interface' identifier objc-superclass[opt] 
///       objc-protocol-refs[opt]
///       objc-class-instance-variables[opt] 
///       objc-interface-decl-list
///     @end
///
///   objc-category-interface:
///     '@' 'interface' identifier '(' identifier[opt] ')' 
///       objc-protocol-refs[opt]
///       objc-interface-decl-list
///     @end
///
///   objc-superclass:
///     ':' identifier
///
///   objc-class-interface-attributes:
///     __attribute__((visibility("default")))
///     __attribute__((visibility("hidden")))
///     __attribute__((deprecated))
///     __attribute__((unavailable))
///     __attribute__((objc_exception)) - used by NSException on 64-bit
///
Parser::DeclTy *Parser::ParseObjCAtInterfaceDeclaration(
  SourceLocation atLoc, AttributeList *attrList) {
  assert(Tok.isObjCAtKeyword(tok::objc_interface) &&
         "ParseObjCAtInterfaceDeclaration(): Expected @interface");
  ConsumeToken(); // the "interface" identifier
  
  if (Tok.getKind() != tok::identifier) {
    Diag(Tok, diag::err_expected_ident); // missing class or category name.
    return 0;
  }
  // We have a class or category name - consume it.
  IdentifierInfo *nameId = Tok.getIdentifierInfo();
  SourceLocation nameLoc = ConsumeToken();
  
  if (Tok.getKind() == tok::l_paren) { // we have a category.
    SourceLocation lparenLoc = ConsumeParen();
    SourceLocation categoryLoc, rparenLoc;
    IdentifierInfo *categoryId = 0;
    
    // For ObjC2, the category name is optional (not an error).
    if (Tok.getKind() == tok::identifier) {
      categoryId = Tok.getIdentifierInfo();
      categoryLoc = ConsumeToken();
    } else if (!getLang().ObjC2) {
      Diag(Tok, diag::err_expected_ident); // missing category name.
      return 0;
    }
    if (Tok.getKind() != tok::r_paren) {
      Diag(Tok, diag::err_expected_rparen);
      SkipUntil(tok::r_paren,