42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
//===--- MacroExpander.cpp - Lex from a macro expansion -------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source 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 the MacroExpander interface.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Lex/MacroExpander.h"
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#include "clang/Lex/MacroInfo.h"
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#include "clang/Lex/Preprocessor.h"
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using namespace llvm;
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using namespace clang;
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/// Lex - Lex and return a token from this macro stream.
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void MacroExpander::Lex(LexerToken &Tok) {
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// Lexing off the end of the macro, pop this macro off the expansion stack.
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if (CurToken == Macro.getNumTokens())
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return PP.HandleEndOfMacro(Tok);
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// Get the next token to return.
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Tok = Macro.getReplacementToken(CurToken++);
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// If this is the first token, set the lexical properties of the token to
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// match the lexical properties of the macro identifier.
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if (CurToken == 1) {
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Tok.SetFlagValue(LexerToken::StartOfLine , AtStartOfLine);
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Tok.SetFlagValue(LexerToken::LeadingSpace, HasLeadingSpace);
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}
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// Handle recursive expansion!
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if (Tok.getIdentifierInfo())
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return PP.HandleIdentifier(Tok);
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// Otherwise, return a normal token.
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}
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