94 lines
2.7 KiB
C++
Executable File
94 lines
2.7 KiB
C++
Executable File
//
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//Copyright (C) 2016 Google, Inc.
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//
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//All rights reserved.
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//
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//Redistribution and use in source and binary forms, with or without
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//modification, are permitted provided that the following conditions
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//are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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//
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// Neither the name of Google, Inc., nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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//"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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//LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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//FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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//COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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//INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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//BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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//LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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//CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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//LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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//ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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//POSSIBILITY OF SUCH DAMAGE.
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//
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#include "hlslTokens.h"
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#include "hlslGrammar.h"
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namespace glslang {
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// Root entry point to this recursive decent parser.
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// Return true if compilation unit was successfully accepted.
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bool HlslGrammar::parse()
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{
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advanceToken();
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return acceptCompilationUnit();
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}
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void HlslGrammar::expected(const char* syntax)
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{
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parseContext.error(token.loc, "Expected", syntax, "");
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}
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// Load 'token' with the next token in the stream of tokens.
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void HlslGrammar::advanceToken()
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{
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scanContext.tokenize(token);
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}
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// Return true and advance to the next token if the current token is the
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// expected (passed in) token class.
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bool HlslGrammar::acceptTokenClass(EHlslTokenClass tokenClass)
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{
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if (token.tokenClass == tokenClass) {
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advanceToken();
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return true;
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}
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return false;
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}
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// compilationUnit
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// : list of externalDeclaration
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//
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bool HlslGrammar::acceptCompilationUnit()
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{
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while (token.tokenClass != EHTokNone) {
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if (! acceptDeclaration())
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return false;
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}
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return true;
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}
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// declaration
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// : dummy stub
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bool HlslGrammar::acceptDeclaration()
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{
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advanceToken();
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return true;
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}
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} // end namespace glslang
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