76 lines
2.3 KiB
C++
76 lines
2.3 KiB
C++
/*============================================================================
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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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cmGeneratorExpressionLexer::cmGeneratorExpressionLexer()
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: SawBeginExpression(false)
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, SawGeneratorExpression(false)
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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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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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std::vector<cmGeneratorExpressionToken> cmGeneratorExpressionLexer::Tokenize(
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const std::string& input)
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{
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std::vector<cmGeneratorExpressionToken> result;
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const char* c = input.c_str();
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const char* upto = c;
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for (; *c; ++c) {
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switch (*c) {
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case '$':
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if (c[1] == '<') {
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InsertText(upto, c, result);
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::BeginExpression, c, 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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break;
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case '>':
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InsertText(upto, c, result);
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::EndExpression, c, 1));
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upto = c + 1;
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SawGeneratorExpression = SawBeginExpression;
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break;
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case ':':
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InsertText(upto, c, result);
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::ColonSeparator, c, 1));
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upto = c + 1;
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break;
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case ',':
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InsertText(upto, c, result);
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result.push_back(cmGeneratorExpressionToken(
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cmGeneratorExpressionToken::CommaSeparator, c, 1));
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upto = c + 1;
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break;
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default:
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break;
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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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