Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 1 | //===--- ParseCXXInlineMethods.cpp - C++ class inline methods parsing------===// |
| 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 parsing for C++ class inline methods. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "clang/Parse/Parser.h" |
| 15 | #include "clang/Parse/DeclSpec.h" |
| 16 | #include "clang/Parse/Scope.h" |
| 17 | using namespace clang; |
| 18 | |
| 19 | /// ParseInlineCXXMethodDef - We parsed and verified that the specified |
| 20 | /// Declarator is a well formed C++ inline method definition. Now lex its body |
| 21 | /// and store its tokens for parsing after the C++ class is complete. |
| 22 | Parser::DeclTy * |
| 23 | Parser::ParseCXXInlineMethodDef(AccessSpecifier AS, Declarator &D) { |
| 24 | assert(D.getTypeObject(0).Kind == DeclaratorChunk::Function && |
| 25 | "This isn't a function declarator!"); |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 26 | assert((Tok.is(tok::l_brace) || Tok.is(tok::colon)) && |
| 27 | "Current token not a '{' or ':'!"); |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 28 | |
| 29 | DeclTy *FnD = Actions.ActOnCXXMemberDeclarator(CurScope, AS, D, 0, 0, 0); |
| 30 | |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 31 | // Consume the tokens and store them for later parsing. |
| 32 | |
| 33 | getCurTopClassStack().push(LexedMethod(FnD)); |
| 34 | TokensTy &Toks = getCurTopClassStack().top().Toks; |
| 35 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 36 | // We may have a constructor initializer here. |
| 37 | if (Tok.is(tok::colon)) { |
| 38 | // Consume everything up to (and including) the left brace. |
| 39 | ConsumeAndStoreUntil(tok::l_brace, Toks); |
| 40 | } else { |
| 41 | // Begin by storing the '{' token. |
| 42 | Toks.push_back(Tok); |
| 43 | ConsumeBrace(); |
| 44 | } |
| 45 | // Consume everything up to (and including) the matching right brace. |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 46 | ConsumeAndStoreUntil(tok::r_brace, Toks); |
| 47 | |
| 48 | return FnD; |
| 49 | } |
| 50 | |
| 51 | /// ParseLexedMethodDefs - We finished parsing the member specification of a top |
| 52 | /// (non-nested) C++ class. Now go over the stack of lexed methods that were |
| 53 | /// collected during its parsing and parse them all. |
| 54 | void Parser::ParseLexedMethodDefs() { |
| 55 | while (!getCurTopClassStack().empty()) { |
| 56 | LexedMethod &LM = getCurTopClassStack().top(); |
| 57 | |
| 58 | assert(!LM.Toks.empty() && "Empty body!"); |
| 59 | // Append the current token at the end of the new token stream so that it |
| 60 | // doesn't get lost. |
| 61 | LM.Toks.push_back(Tok); |
| 62 | PP.EnterTokenStream(&LM.Toks.front(), LM.Toks.size(), true, false); |
| 63 | |
| 64 | // Consume the previously pushed token. |
| 65 | ConsumeAnyToken(); |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 66 | assert((Tok.is(tok::l_brace) || Tok.is(tok::colon)) && |
| 67 | "Inline method not starting with '{' or ':'"); |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 68 | |
| 69 | // Parse the method body. Function body parsing code is similar enough |
| 70 | // to be re-used for method bodies as well. |
| 71 | EnterScope(Scope::FnScope|Scope::DeclScope); |
| 72 | Actions.ActOnStartOfFunctionDef(CurScope, LM.D); |
| 73 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 74 | if (Tok.is(tok::colon)) |
| 75 | ParseConstructorInitializer(LM.D); |
| 76 | |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 77 | ParseFunctionStatementBody(LM.D, Tok.getLocation(), Tok.getLocation()); |
| 78 | |
| 79 | getCurTopClassStack().pop(); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | /// ConsumeAndStoreUntil - Consume and store the token at the passed token |
| 84 | /// container until the token 'T' is reached (which gets consumed/stored too). |
| 85 | /// Returns true if token 'T' was found. |
| 86 | /// NOTE: This is a specialized version of Parser::SkipUntil. |
| 87 | bool Parser::ConsumeAndStoreUntil(tok::TokenKind T, TokensTy &Toks) { |
| 88 | // We always want this function to consume at least one token if the first |
| 89 | // token isn't T and if not at EOF. |
| 90 | bool isFirstTokenConsumed = true; |
| 91 | while (1) { |
| 92 | // If we found one of the tokens, stop and return true. |
| 93 | if (Tok.is(T)) { |
| 94 | Toks.push_back(Tok); |
| 95 | ConsumeAnyToken(); |
| 96 | return true; |
| 97 | } |
| 98 | |
| 99 | switch (Tok.getKind()) { |
| 100 | case tok::eof: |
| 101 | // Ran out of tokens. |
| 102 | return false; |
| 103 | |
| 104 | case tok::l_paren: |
| 105 | // Recursively consume properly-nested parens. |
| 106 | Toks.push_back(Tok); |
| 107 | ConsumeParen(); |
| 108 | ConsumeAndStoreUntil(tok::r_paren, Toks); |
| 109 | break; |
| 110 | case tok::l_square: |
| 111 | // Recursively consume properly-nested square brackets. |
| 112 | Toks.push_back(Tok); |
| 113 | ConsumeBracket(); |
| 114 | ConsumeAndStoreUntil(tok::r_square, Toks); |
| 115 | break; |
| 116 | case tok::l_brace: |
| 117 | // Recursively consume properly-nested braces. |
| 118 | Toks.push_back(Tok); |
| 119 | ConsumeBrace(); |
| 120 | ConsumeAndStoreUntil(tok::r_brace, Toks); |
| 121 | break; |
| 122 | |
| 123 | // Okay, we found a ']' or '}' or ')', which we think should be balanced. |
| 124 | // Since the user wasn't looking for this token (if they were, it would |
| 125 | // already be handled), this isn't balanced. If there is a LHS token at a |
| 126 | // higher level, we will assume that this matches the unbalanced token |
| 127 | // and return it. Otherwise, this is a spurious RHS token, which we skip. |
| 128 | case tok::r_paren: |
| 129 | if (ParenCount && !isFirstTokenConsumed) |
| 130 | return false; // Matches something. |
| 131 | Toks.push_back(Tok); |
| 132 | ConsumeParen(); |
| 133 | break; |
| 134 | case tok::r_square: |
| 135 | if (BracketCount && !isFirstTokenConsumed) |
| 136 | return false; // Matches something. |
| 137 | Toks.push_back(Tok); |
| 138 | ConsumeBracket(); |
| 139 | break; |
| 140 | case tok::r_brace: |
| 141 | if (BraceCount && !isFirstTokenConsumed) |
| 142 | return false; // Matches something. |
| 143 | Toks.push_back(Tok); |
| 144 | ConsumeBrace(); |
| 145 | break; |
| 146 | |
| 147 | case tok::string_literal: |
| 148 | case tok::wide_string_literal: |
| 149 | Toks.push_back(Tok); |
| 150 | ConsumeStringToken(); |
| 151 | break; |
| 152 | default: |
| 153 | // consume this token. |
| 154 | Toks.push_back(Tok); |
| 155 | ConsumeToken(); |
| 156 | break; |
| 157 | } |
| 158 | isFirstTokenConsumed = false; |
| 159 | } |
| 160 | } |