forked from OSchip/llvm-project
700 lines
26 KiB
C++
700 lines
26 KiB
C++
//===--- ParseCXXInlineMethods.cpp - C++ class inline methods parsing------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements parsing for C++ class inline methods.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Parse/ParseDiagnostic.h"
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#include "clang/Parse/Parser.h"
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#include "clang/Sema/DeclSpec.h"
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#include "clang/Sema/Scope.h"
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#include "clang/AST/DeclTemplate.h"
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#include "RAIIObjectsForParser.h"
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using namespace clang;
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/// ParseCXXInlineMethodDef - We parsed and verified that the specified
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/// Declarator is a well formed C++ inline method definition. Now lex its body
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/// and store its tokens for parsing after the C++ class is complete.
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Decl *Parser::ParseCXXInlineMethodDef(AccessSpecifier AS,
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AttributeList *AccessAttrs,
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ParsingDeclarator &D,
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const ParsedTemplateInfo &TemplateInfo,
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const VirtSpecifiers& VS,
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FunctionDefinitionKind DefinitionKind,
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ExprResult& Init) {
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assert(D.isFunctionDeclarator() && "This isn't a function declarator!");
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assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try) ||
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Tok.is(tok::equal)) &&
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"Current token not a '{', ':', '=', or 'try'!");
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MultiTemplateParamsArg TemplateParams(
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TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->data() : 0,
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TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->size() : 0);
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Decl *FnD;
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D.setFunctionDefinitionKind(DefinitionKind);
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if (D.getDeclSpec().isFriendSpecified())
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FnD = Actions.ActOnFriendFunctionDecl(getCurScope(), D,
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TemplateParams);
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else {
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FnD = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, D,
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TemplateParams, 0,
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VS, ICIS_NoInit);
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if (FnD) {
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Actions.ProcessDeclAttributeList(getCurScope(), FnD, AccessAttrs,
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false, true);
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bool TypeSpecContainsAuto
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= D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto;
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if (Init.isUsable())
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Actions.AddInitializerToDecl(FnD, Init.get(), false,
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TypeSpecContainsAuto);
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else
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Actions.ActOnUninitializedDecl(FnD, TypeSpecContainsAuto);
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}
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}
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HandleMemberFunctionDeclDelays(D, FnD);
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D.complete(FnD);
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if (Tok.is(tok::equal)) {
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ConsumeToken();
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if (!FnD) {
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SkipUntil(tok::semi);
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return 0;
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}
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bool Delete = false;
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SourceLocation KWLoc;
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if (Tok.is(tok::kw_delete)) {
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Diag(Tok, getLangOpts().CPlusPlus0x ?
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diag::warn_cxx98_compat_deleted_function :
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diag::ext_deleted_function);
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KWLoc = ConsumeToken();
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Actions.SetDeclDeleted(FnD, KWLoc);
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Delete = true;
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} else if (Tok.is(tok::kw_default)) {
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Diag(Tok, getLangOpts().CPlusPlus0x ?
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diag::warn_cxx98_compat_defaulted_function :
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diag::ext_defaulted_function);
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KWLoc = ConsumeToken();
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Actions.SetDeclDefaulted(FnD, KWLoc);
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} else {
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llvm_unreachable("function definition after = not 'delete' or 'default'");
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}
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if (Tok.is(tok::comma)) {
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Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
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<< Delete;
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SkipUntil(tok::semi);
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} else {
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ExpectAndConsume(tok::semi, diag::err_expected_semi_after,
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Delete ? "delete" : "default", tok::semi);
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}
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return FnD;
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}
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// In delayed template parsing mode, if we are within a class template
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// or if we are about to parse function member template then consume
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// the tokens and store them for parsing at the end of the translation unit.
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if (getLangOpts().DelayedTemplateParsing &&
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DefinitionKind == FDK_Definition &&
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((Actions.CurContext->isDependentContext() ||
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TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) &&
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!Actions.IsInsideALocalClassWithinATemplateFunction())) {
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if (FnD) {
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LateParsedTemplatedFunction *LPT = new LateParsedTemplatedFunction(FnD);
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FunctionDecl *FD = 0;
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if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(FnD))
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FD = FunTmpl->getTemplatedDecl();
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else
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FD = cast<FunctionDecl>(FnD);
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Actions.CheckForFunctionRedefinition(FD);
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LateParsedTemplateMap[FD] = LPT;
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Actions.MarkAsLateParsedTemplate(FD);
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LexTemplateFunctionForLateParsing(LPT->Toks);
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} else {
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CachedTokens Toks;
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LexTemplateFunctionForLateParsing(Toks);
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}
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return FnD;
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}
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// Consume the tokens and store them for later parsing.
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LexedMethod* LM = new LexedMethod(this, FnD);
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getCurrentClass().LateParsedDeclarations.push_back(LM);
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LM->TemplateScope = getCurScope()->isTemplateParamScope();
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CachedTokens &Toks = LM->Toks;
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tok::TokenKind kind = Tok.getKind();
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// Consume everything up to (and including) the left brace of the
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// function body.
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if (ConsumeAndStoreFunctionPrologue(Toks)) {
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// We didn't find the left-brace we expected after the
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// constructor initializer; we already printed an error, and it's likely
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// impossible to recover, so don't try to parse this method later.
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// If we stopped at a semicolon, consume it to avoid an extra warning.
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if (Tok.is(tok::semi))
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ConsumeToken();
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delete getCurrentClass().LateParsedDeclarations.back();
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getCurrentClass().LateParsedDeclarations.pop_back();
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return FnD;
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} else {
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// Consume everything up to (and including) the matching right brace.
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ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
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}
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// If we're in a function-try-block, we need to store all the catch blocks.
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if (kind == tok::kw_try) {
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while (Tok.is(tok::kw_catch)) {
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ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
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ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
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}
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}
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if (!FnD) {
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// If semantic analysis could not build a function declaration,
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// just throw away the late-parsed declaration.
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delete getCurrentClass().LateParsedDeclarations.back();
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getCurrentClass().LateParsedDeclarations.pop_back();
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}
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return FnD;
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}
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/// ParseCXXNonStaticMemberInitializer - We parsed and verified that the
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/// specified Declarator is a well formed C++ non-static data member
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/// declaration. Now lex its initializer and store its tokens for parsing
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/// after the class is complete.
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void Parser::ParseCXXNonStaticMemberInitializer(Decl *VarD) {
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assert((Tok.is(tok::l_brace) || Tok.is(tok::equal)) &&
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"Current token not a '{' or '='!");
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LateParsedMemberInitializer *MI =
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new LateParsedMemberInitializer(this, VarD);
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getCurrentClass().LateParsedDeclarations.push_back(MI);
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CachedTokens &Toks = MI->Toks;
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tok::TokenKind kind = Tok.getKind();
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if (kind == tok::equal) {
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Toks.push_back(Tok);
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ConsumeToken();
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}
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if (kind == tok::l_brace) {
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// Begin by storing the '{' token.
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Toks.push_back(Tok);
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ConsumeBrace();
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// Consume everything up to (and including) the matching right brace.
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ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/true);
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} else {
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// Consume everything up to (but excluding) the comma or semicolon.
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ConsumeAndStoreUntil(tok::comma, Toks, /*StopAtSemi=*/true,
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/*ConsumeFinalToken=*/false);
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}
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// Store an artificial EOF token to ensure that we don't run off the end of
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// the initializer when we come to parse it.
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Token Eof;
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Eof.startToken();
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Eof.setKind(tok::eof);
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Eof.setLocation(Tok.getLocation());
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Toks.push_back(Eof);
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}
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Parser::LateParsedDeclaration::~LateParsedDeclaration() {}
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void Parser::LateParsedDeclaration::ParseLexedMethodDeclarations() {}
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void Parser::LateParsedDeclaration::ParseLexedMemberInitializers() {}
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void Parser::LateParsedDeclaration::ParseLexedMethodDefs() {}
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Parser::LateParsedClass::LateParsedClass(Parser *P, ParsingClass *C)
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: Self(P), Class(C) {}
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Parser::LateParsedClass::~LateParsedClass() {
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Self->DeallocateParsedClasses(Class);
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}
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void Parser::LateParsedClass::ParseLexedMethodDeclarations() {
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Self->ParseLexedMethodDeclarations(*Class);
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}
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void Parser::LateParsedClass::ParseLexedMemberInitializers() {
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Self->ParseLexedMemberInitializers(*Class);
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}
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void Parser::LateParsedClass::ParseLexedMethodDefs() {
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Self->ParseLexedMethodDefs(*Class);
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}
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void Parser::LateParsedMethodDeclaration::ParseLexedMethodDeclarations() {
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Self->ParseLexedMethodDeclaration(*this);
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}
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void Parser::LexedMethod::ParseLexedMethodDefs() {
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Self->ParseLexedMethodDef(*this);
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}
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void Parser::LateParsedMemberInitializer::ParseLexedMemberInitializers() {
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Self->ParseLexedMemberInitializer(*this);
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}
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/// ParseLexedMethodDeclarations - We finished parsing the member
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/// specification of a top (non-nested) C++ class. Now go over the
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/// stack of method declarations with some parts for which parsing was
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/// delayed (such as default arguments) and parse them.
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void Parser::ParseLexedMethodDeclarations(ParsingClass &Class) {
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bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
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ParseScope ClassTemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
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if (HasTemplateScope)
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Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
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// The current scope is still active if we're the top-level class.
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// Otherwise we'll need to push and enter a new scope.
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bool HasClassScope = !Class.TopLevelClass;
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ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
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HasClassScope);
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if (HasClassScope)
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Actions.ActOnStartDelayedMemberDeclarations(getCurScope(), Class.TagOrTemplate);
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for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
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Class.LateParsedDeclarations[i]->ParseLexedMethodDeclarations();
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}
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if (HasClassScope)
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Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(), Class.TagOrTemplate);
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}
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void Parser::ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM) {
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// If this is a member template, introduce the template parameter scope.
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ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
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if (LM.TemplateScope)
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Actions.ActOnReenterTemplateScope(getCurScope(), LM.Method);
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// Start the delayed C++ method declaration
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Actions.ActOnStartDelayedCXXMethodDeclaration(getCurScope(), LM.Method);
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// Introduce the parameters into scope and parse their default
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// arguments.
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ParseScope PrototypeScope(this,
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Scope::FunctionPrototypeScope|Scope::DeclScope);
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for (unsigned I = 0, N = LM.DefaultArgs.size(); I != N; ++I) {
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// Introduce the parameter into scope.
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Actions.ActOnDelayedCXXMethodParameter(getCurScope(),
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LM.DefaultArgs[I].Param);
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if (CachedTokens *Toks = LM.DefaultArgs[I].Toks) {
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// Save the current token position.
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SourceLocation origLoc = Tok.getLocation();
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// Parse the default argument from its saved token stream.
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Toks->push_back(Tok); // So that the current token doesn't get lost
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PP.EnterTokenStream(&Toks->front(), Toks->size(), true, false);
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// Consume the previously-pushed token.
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ConsumeAnyToken();
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// Consume the '='.
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assert(Tok.is(tok::equal) && "Default argument not starting with '='");
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SourceLocation EqualLoc = ConsumeToken();
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// The argument isn't actually potentially evaluated unless it is
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// used.
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EnterExpressionEvaluationContext Eval(Actions,
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Sema::PotentiallyEvaluatedIfUsed,
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LM.DefaultArgs[I].Param);
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ExprResult DefArgResult;
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if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) {
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Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
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DefArgResult = ParseBraceInitializer();
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} else
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DefArgResult = ParseAssignmentExpression();
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if (DefArgResult.isInvalid())
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Actions.ActOnParamDefaultArgumentError(LM.DefaultArgs[I].Param);
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else {
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if (Tok.is(tok::cxx_defaultarg_end))
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ConsumeToken();
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else
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Diag(Tok.getLocation(), diag::err_default_arg_unparsed);
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Actions.ActOnParamDefaultArgument(LM.DefaultArgs[I].Param, EqualLoc,
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DefArgResult.take());
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}
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assert(!PP.getSourceManager().isBeforeInTranslationUnit(origLoc,
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Tok.getLocation()) &&
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"ParseAssignmentExpression went over the default arg tokens!");
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// There could be leftover tokens (e.g. because of an error).
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// Skip through until we reach the original token position.
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while (Tok.getLocation() != origLoc && Tok.isNot(tok::eof))
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ConsumeAnyToken();
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delete Toks;
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LM.DefaultArgs[I].Toks = 0;
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}
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}
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PrototypeScope.Exit();
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// Finish the delayed C++ method declaration.
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Actions.ActOnFinishDelayedCXXMethodDeclaration(getCurScope(), LM.Method);
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}
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/// ParseLexedMethodDefs - We finished parsing the member specification of a top
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/// (non-nested) C++ class. Now go over the stack of lexed methods that were
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/// collected during its parsing and parse them all.
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void Parser::ParseLexedMethodDefs(ParsingClass &Class) {
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bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
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ParseScope ClassTemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
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if (HasTemplateScope)
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Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
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bool HasClassScope = !Class.TopLevelClass;
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ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
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HasClassScope);
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for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
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Class.LateParsedDeclarations[i]->ParseLexedMethodDefs();
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}
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}
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void Parser::ParseLexedMethodDef(LexedMethod &LM) {
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// If this is a member template, introduce the template parameter scope.
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ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
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if (LM.TemplateScope)
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Actions.ActOnReenterTemplateScope(getCurScope(), LM.D);
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// Save the current token position.
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SourceLocation origLoc = Tok.getLocation();
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assert(!LM.Toks.empty() && "Empty body!");
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// Append the current token at the end of the new token stream so that it
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// doesn't get lost.
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LM.Toks.push_back(Tok);
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PP.EnterTokenStream(LM.Toks.data(), LM.Toks.size(), true, false);
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// Consume the previously pushed token.
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ConsumeAnyToken();
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assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try))
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&& "Inline method not starting with '{', ':' or 'try'");
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// Parse the method body. Function body parsing code is similar enough
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// to be re-used for method bodies as well.
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ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);
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Actions.ActOnStartOfFunctionDef(getCurScope(), LM.D);
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if (Tok.is(tok::kw_try)) {
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ParseFunctionTryBlock(LM.D, FnScope);
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assert(!PP.getSourceManager().isBeforeInTranslationUnit(origLoc,
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Tok.getLocation()) &&
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"ParseFunctionTryBlock went over the cached tokens!");
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// There could be leftover tokens (e.g. because of an error).
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// Skip through until we reach the original token position.
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while (Tok.getLocation() != origLoc && Tok.isNot(tok::eof))
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ConsumeAnyToken();
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return;
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}
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if (Tok.is(tok::colon)) {
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ParseConstructorInitializer(LM.D);
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// Error recovery.
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if (!Tok.is(tok::l_brace)) {
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FnScope.Exit();
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Actions.ActOnFinishFunctionBody(LM.D, 0);
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while (Tok.getLocation() != origLoc && Tok.isNot(tok::eof))
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ConsumeAnyToken();
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return;
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}
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} else
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Actions.ActOnDefaultCtorInitializers(LM.D);
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ParseFunctionStatementBody(LM.D, FnScope);
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if (Tok.getLocation() != origLoc) {
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// Due to parsing error, we either went over the cached tokens or
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// there are still cached tokens left. If it's the latter case skip the
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// leftover tokens.
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// Since this is an uncommon situation that should be avoided, use the
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// expensive isBeforeInTranslationUnit call.
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if (PP.getSourceManager().isBeforeInTranslationUnit(Tok.getLocation(),
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origLoc))
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while (Tok.getLocation() != origLoc && Tok.isNot(tok::eof))
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ConsumeAnyToken();
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}
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}
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/// ParseLexedMemberInitializers - We finished parsing the member specification
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/// of a top (non-nested) C++ class. Now go over the stack of lexed data member
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/// initializers that were collected during its parsing and parse them all.
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void Parser::ParseLexedMemberInitializers(ParsingClass &Class) {
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bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
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ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
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HasTemplateScope);
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if (HasTemplateScope)
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Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
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// Set or update the scope flags.
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bool AlreadyHasClassScope = Class.TopLevelClass;
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unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
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ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
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ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
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if (!AlreadyHasClassScope)
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Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
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Class.TagOrTemplate);
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if (!Class.LateParsedDeclarations.empty()) {
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// C++11 [expr.prim.general]p4:
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// Otherwise, if a member-declarator declares a non-static data member
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// (9.2) of a class X, the expression this is a prvalue of type "pointer
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// to X" within the optional brace-or-equal-initializer. It shall not
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// appear elsewhere in the member-declarator.
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Sema::CXXThisScopeRAII ThisScope(Actions, Class.TagOrTemplate,
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/*TypeQuals=*/(unsigned)0);
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for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
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Class.LateParsedDeclarations[i]->ParseLexedMemberInitializers();
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|
}
|
|
}
|
|
|
|
if (!AlreadyHasClassScope)
|
|
Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
|
|
Class.TagOrTemplate);
|
|
|
|
Actions.ActOnFinishDelayedMemberInitializers(Class.TagOrTemplate);
|
|
}
|
|
|
|
void Parser::ParseLexedMemberInitializer(LateParsedMemberInitializer &MI) {
|
|
if (!MI.Field || MI.Field->isInvalidDecl())
|
|
return;
|
|
|
|
// Append the current token at the end of the new token stream so that it
|
|
// doesn't get lost.
|
|
MI.Toks.push_back(Tok);
|
|
PP.EnterTokenStream(MI.Toks.data(), MI.Toks.size(), true, false);
|
|
|
|
// Consume the previously pushed token.
|
|
ConsumeAnyToken();
|
|
|
|
SourceLocation EqualLoc;
|
|
|
|
ExprResult Init = ParseCXXMemberInitializer(MI.Field, /*IsFunction=*/false,
|
|
EqualLoc);
|
|
|
|
Actions.ActOnCXXInClassMemberInitializer(MI.Field, EqualLoc, Init.release());
|
|
|
|
// The next token should be our artificial terminating EOF token.
|
|
if (Tok.isNot(tok::eof)) {
|
|
SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
|
|
if (!EndLoc.isValid())
|
|
EndLoc = Tok.getLocation();
|
|
// No fixit; we can't recover as if there were a semicolon here.
|
|
Diag(EndLoc, diag::err_expected_semi_decl_list);
|
|
|
|
// Consume tokens until we hit the artificial EOF.
|
|
while (Tok.isNot(tok::eof))
|
|
ConsumeAnyToken();
|
|
}
|
|
ConsumeAnyToken();
|
|
}
|
|
|
|
/// ConsumeAndStoreUntil - Consume and store the token at the passed token
|
|
/// container until the token 'T' is reached (which gets
|
|
/// consumed/stored too, if ConsumeFinalToken).
|
|
/// If StopAtSemi is true, then we will stop early at a ';' character.
|
|
/// Returns true if token 'T1' or 'T2' was found.
|
|
/// NOTE: This is a specialized version of Parser::SkipUntil.
|
|
bool Parser::ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
|
|
CachedTokens &Toks,
|
|
bool StopAtSemi, bool ConsumeFinalToken) {
|
|
// We always want this function to consume at least one token if the first
|
|
// token isn't T and if not at EOF.
|
|
bool isFirstTokenConsumed = true;
|
|
while (1) {
|
|
// If we found one of the tokens, stop and return true.
|
|
if (Tok.is(T1) || Tok.is(T2)) {
|
|
if (ConsumeFinalToken) {
|
|
Toks.push_back(Tok);
|
|
ConsumeAnyToken();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
switch (Tok.getKind()) {
|
|
case tok::eof:
|
|
// Ran out of tokens.
|
|
return false;
|
|
|
|
case tok::l_paren:
|
|
// Recursively consume properly-nested parens.
|
|
Toks.push_back(Tok);
|
|
ConsumeParen();
|
|
ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
|
|
break;
|
|
case tok::l_square:
|
|
// Recursively consume properly-nested square brackets.
|
|
Toks.push_back(Tok);
|
|
ConsumeBracket();
|
|
ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
|
|
break;
|
|
case tok::l_brace:
|
|
// Recursively consume properly-nested braces.
|
|
Toks.push_back(Tok);
|
|
ConsumeBrace();
|
|
ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
|
|
break;
|
|
|
|
// Okay, we found a ']' or '}' or ')', which we think should be balanced.
|
|
// Since the user wasn't looking for this token (if they were, it would
|
|
// already be handled), this isn't balanced. If there is a LHS token at a
|
|
// higher level, we will assume that this matches the unbalanced token
|
|
// and return it. Otherwise, this is a spurious RHS token, which we skip.
|
|
case tok::r_paren:
|
|
if (ParenCount && !isFirstTokenConsumed)
|
|
return false; // Matches something.
|
|
Toks.push_back(Tok);
|
|
ConsumeParen();
|
|
break;
|
|
case tok::r_square:
|
|
if (BracketCount && !isFirstTokenConsumed)
|
|
return false; // Matches something.
|
|
Toks.push_back(Tok);
|
|
ConsumeBracket();
|
|
break;
|
|
case tok::r_brace:
|
|
if (BraceCount && !isFirstTokenConsumed)
|
|
return false; // Matches something.
|
|
Toks.push_back(Tok);
|
|
ConsumeBrace();
|
|
break;
|
|
|
|
case tok::code_completion:
|
|
Toks.push_back(Tok);
|
|
ConsumeCodeCompletionToken();
|
|
break;
|
|
|
|
case tok::string_literal:
|
|
case tok::wide_string_literal:
|
|
case tok::utf8_string_literal:
|
|
case tok::utf16_string_literal:
|
|
case tok::utf32_string_literal:
|
|
Toks.push_back(Tok);
|
|
ConsumeStringToken();
|
|
break;
|
|
case tok::semi:
|
|
if (StopAtSemi)
|
|
return false;
|
|
// FALL THROUGH.
|
|
default:
|
|
// consume this token.
|
|
Toks.push_back(Tok);
|
|
ConsumeToken();
|
|
break;
|
|
}
|
|
isFirstTokenConsumed = false;
|
|
}
|
|
}
|
|
|
|
/// \brief Consume tokens and store them in the passed token container until
|
|
/// we've passed the try keyword and constructor initializers and have consumed
|
|
/// the opening brace of the function body. The opening brace will be consumed
|
|
/// if and only if there was no error.
|
|
///
|
|
/// \return True on error.
|
|
bool Parser::ConsumeAndStoreFunctionPrologue(CachedTokens &Toks) {
|
|
if (Tok.is(tok::kw_try)) {
|
|
Toks.push_back(Tok);
|
|
ConsumeToken();
|
|
}
|
|
bool ReadInitializer = false;
|
|
if (Tok.is(tok::colon)) {
|
|
// Initializers can contain braces too.
|
|
Toks.push_back(Tok);
|
|
ConsumeToken();
|
|
|
|
while (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) {
|
|
if (Tok.is(tok::eof) || Tok.is(tok::semi))
|
|
return Diag(Tok.getLocation(), diag::err_expected_lbrace);
|
|
|
|
// Grab the identifier.
|
|
if (!ConsumeAndStoreUntil(tok::l_paren, tok::l_brace, Toks,
|
|
/*StopAtSemi=*/true,
|
|
/*ConsumeFinalToken=*/false))
|
|
return Diag(Tok.getLocation(), diag::err_expected_lparen);
|
|
|
|
tok::TokenKind kind = Tok.getKind();
|
|
Toks.push_back(Tok);
|
|
bool IsLParen = (kind == tok::l_paren);
|
|
SourceLocation LOpen = Tok.getLocation();
|
|
|
|
if (IsLParen) {
|
|
ConsumeParen();
|
|
} else {
|
|
assert(kind == tok::l_brace && "Must be left paren or brace here.");
|
|
ConsumeBrace();
|
|
// In C++03, this has to be the start of the function body, which
|
|
// means the initializer is malformed; we'll diagnose it later.
|
|
if (!getLangOpts().CPlusPlus0x)
|
|
return false;
|
|
}
|
|
|
|
// Grab the initializer
|
|
if (!ConsumeAndStoreUntil(IsLParen ? tok::r_paren : tok::r_brace,
|
|
Toks, /*StopAtSemi=*/true)) {
|
|
Diag(Tok, IsLParen ? diag::err_expected_rparen :
|
|
diag::err_expected_rbrace);
|
|
Diag(LOpen, diag::note_matching) << (IsLParen ? "(" : "{");
|
|
return true;
|
|
}
|
|
|
|
// Grab pack ellipsis, if present
|
|
if (Tok.is(tok::ellipsis)) {
|
|
Toks.push_back(Tok);
|
|
ConsumeToken();
|
|
}
|
|
|
|
// Grab the separating comma, if any.
|
|
if (Tok.is(tok::comma)) {
|
|
Toks.push_back(Tok);
|
|
ConsumeToken();
|
|
} else if (Tok.isNot(tok::l_brace)) {
|
|
ReadInitializer = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Grab any remaining garbage to be diagnosed later. We stop when we reach a
|
|
// brace: an opening one is the function body, while a closing one probably
|
|
// means we've reached the end of the class.
|
|
ConsumeAndStoreUntil(tok::l_brace, tok::r_brace, Toks,
|
|
/*StopAtSemi=*/true,
|
|
/*ConsumeFinalToken=*/false);
|
|
if (Tok.isNot(tok::l_brace)) {
|
|
if (ReadInitializer)
|
|
return Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma);
|
|
return Diag(Tok.getLocation(), diag::err_expected_lbrace);
|
|
}
|
|
|
|
Toks.push_back(Tok);
|
|
ConsumeBrace();
|
|
return false;
|
|
}
|