86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
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/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2012 Stephen Kelly <steveire@gmail.com>
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#include "cmGeneratorExpressionLexer.h"
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//----------------------------------------------------------------------------
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cmGeneratorExpressionLexer::cmGeneratorExpressionLexer()
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: SawBeginExpression(false), SawGeneratorExpression(false)
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{
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}
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//----------------------------------------------------------------------------
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static void InsertText(const char *upto, const char *c,
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std::vector<cmGeneratorExpressionToken> &result)
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{
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if (upto != c)
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{
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::Text, upto, c - upto));
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}
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}
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//----------------------------------------------------------------------------
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std::vector<cmGeneratorExpressionToken>
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cmGeneratorExpressionLexer::Tokenize(const char *input)
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{
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std::vector<cmGeneratorExpressionToken> result;
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if (!input)
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return result;
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const char *c = input;
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const char *upto = c;
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for ( ; *c; ++c)
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{
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if(c[0] == '$' && c[1] == '<')
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{
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InsertText(upto, c, result);
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upto = c;
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::BeginExpression, upto, 2));
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upto = c + 2;
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++c;
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SawBeginExpression = true;
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}
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else if(c[0] == '>')
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{
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InsertText(upto, c, result);
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upto = c;
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::EndExpression, upto, 1));
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upto = c + 1;
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SawGeneratorExpression = SawBeginExpression;
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}
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else if(c[0] == ':')
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{
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InsertText(upto, c, result);
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upto = c;
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::ColonSeparator, upto, 1));
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upto = c + 1;
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}
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else if(c[0] == ',')
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{
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InsertText(upto, c, result);
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upto = c;
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::CommaSeparator, upto, 1));
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upto = c + 1;
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}
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}
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InsertText(upto, c, result);
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return result;
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}
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