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Diffstat (limited to '3rdparty/bgfx/3rdparty/glslang/hlsl/hlslTokenStream.h')
-rw-r--r-- | 3rdparty/bgfx/3rdparty/glslang/hlsl/hlslTokenStream.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/3rdparty/bgfx/3rdparty/glslang/hlsl/hlslTokenStream.h b/3rdparty/bgfx/3rdparty/glslang/hlsl/hlslTokenStream.h new file mode 100644 index 00000000000..ec4288943e6 --- /dev/null +++ b/3rdparty/bgfx/3rdparty/glslang/hlsl/hlslTokenStream.h @@ -0,0 +1,89 @@ +// +//Copyright (C) 2016 Google, Inc. +// +//All rights reserved. +// +//Redistribution and use in source and binary forms, with or without +//modification, are permitted provided that the following conditions +//are met: +// +// Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// +// Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following +// disclaimer in the documentation and/or other materials provided +// with the distribution. +// +// Neither the name of Google, Inc., nor the names of its +// contributors may be used to endorse or promote products derived +// from this software without specific prior written permission. +// +//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +//"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +//LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +//FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +//COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +//INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +//BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +//LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +//CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +//LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +//ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +//POSSIBILITY OF SUCH DAMAGE. +// + +#ifndef HLSLTOKENSTREAM_H_ +#define HLSLTOKENSTREAM_H_ + +#include "hlslScanContext.h" + +namespace glslang { + + class HlslTokenStream { + public: + explicit HlslTokenStream(HlslScanContext& scanner) + : scanner(scanner), preTokenStackSize(0), tokenBufferPos(0) { } + virtual ~HlslTokenStream() { } + + public: + void advanceToken(); + void recedeToken(); + bool acceptTokenClass(EHlslTokenClass); + EHlslTokenClass peek() const; + bool peekTokenClass(EHlslTokenClass) const; + + protected: + HlslToken token; // the token we are currently looking at, but have not yet accepted + + private: + HlslTokenStream(); + HlslTokenStream& operator=(const HlslTokenStream&); + + HlslScanContext& scanner; // lexical scanner, to get next token + + // This is the number of tokens we can recedeToken() over. + static const int tokenBufferSize = 2; + + // Previously scanned tokens, returned for future advances, + // so logically in front of the token stream. + // Is logically a stack; needs last in last out semantics. + // Currently implemented as a stack of size 2. + HlslToken preTokenStack[tokenBufferSize]; + int preTokenStackSize; + void pushPreToken(const HlslToken&); + HlslToken popPreToken(); + + // Previously scanned tokens, not yet returned for future advances, + // but available for that. + // Is logically a fifo for normal advances, and a stack for recession. + // Currently implemented with an intrinsic size of 2. + HlslToken tokenBuffer[tokenBufferSize]; + int tokenBufferPos; + void pushTokenBuffer(const HlslToken&); + HlslToken popTokenBuffer(); + }; + +} // end namespace glslang + +#endif // HLSLTOKENSTREAM_H_ |