b16f7e6819
This is needed for accessing types/variables within a member function body that are not known until after the struct is finished being declared. However, that funtionality is not yet present, this is just the deferred processing, which is working for static member functions.
97 lines
3.8 KiB
C++
Executable File
97 lines
3.8 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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#ifndef HLSLTOKENSTREAM_H_
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#define HLSLTOKENSTREAM_H_
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#include "hlslScanContext.h"
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namespace glslang {
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class HlslTokenStream {
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public:
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explicit HlslTokenStream(HlslScanContext& scanner)
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: scanner(scanner), preTokenStackSize(0), tokenBufferPos(0) { }
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virtual ~HlslTokenStream() { }
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public:
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void advanceToken();
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void recedeToken();
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bool acceptTokenClass(EHlslTokenClass);
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EHlslTokenClass peek() const;
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bool peekTokenClass(EHlslTokenClass) const;
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glslang::TBuiltInVariable mapSemantic(const TString& semantic) { return scanner.mapSemantic(semantic); }
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void pushTokenStream(const TVector<HlslToken>* tokens);
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void popTokenStream();
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protected:
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HlslToken token; // the token we are currently looking at, but have not yet accepted
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private:
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HlslTokenStream();
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HlslTokenStream& operator=(const HlslTokenStream&);
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HlslScanContext& scanner; // lexical scanner, to get next token from source file
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TVector<const TVector<HlslToken>*> tokenStreamStack; // for getting the next token from an existing vector of tokens
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TVector<int> tokenPosition;
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TVector<HlslToken> currentTokenStack;
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// This is the number of tokens we can recedeToken() over.
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static const int tokenBufferSize = 2;
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// Previously scanned tokens, returned for future advances,
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// so logically in front of the token stream.
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// Is logically a stack; needs last in last out semantics.
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// Currently implemented as a stack of size 2.
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HlslToken preTokenStack[tokenBufferSize];
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int preTokenStackSize;
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void pushPreToken(const HlslToken&);
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HlslToken popPreToken();
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// Previously scanned tokens, not yet returned for future advances,
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// but available for that.
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// Is logically a fifo for normal advances, and a stack for recession.
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// Currently implemented with an intrinsic size of 2.
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HlslToken tokenBuffer[tokenBufferSize];
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int tokenBufferPos;
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void pushTokenBuffer(const HlslToken&);
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HlslToken popTokenBuffer();
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};
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} // end namespace glslang
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#endif // HLSLTOKENSTREAM_H_
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