mewin/glslang
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
glslang/glslang/MachineIndependent/Scan.cpp

1052 lines
36 KiB
C++
Raw Blame History

//
//Copyright (C) 2002-2005 3Dlabs Inc. Ltd.
//Copyright (C) 2013 LunarG, 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 3Dlabs Inc. Ltd. 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.
//
//
// GLSL scanning, leveraging the scanning done by the preprocessor.
//
#include <string.h>
#include "../Include/Types.h"
#include "SymbolTable.h"
#include "glslang_tab.cpp.h"
#include "ParseHelper.h"
#include "ScanContext.h"
#include "Scan.h"
// preprocessor includes
#include "preprocessor/PpContext.h"
#include "preprocessor/PpTokens.h"
namespace glslang {
// read past any white space
void TInputScanner::consumeWhiteSpace(bool& foundNonSpaceTab)
{
char c = peek(); // don't accidentally consume anything other than whitespace
while (c == ' ' || c == '\t' || c == '\r' || c == '\n') {
if (c == '\r' || c == '\n')
foundNonSpaceTab = true;
get();
c = peek();
}
}
// return true if a comment was actually consumed
bool TInputScanner::consumeComment()
{
if (peek() != '/')
return false;
get(); // consume the '/'
char c = peek();
if (c == '/') {
// a '//' style comment
get(); // consume the second '/'
c = get();
do {
while (c > 0 && c != '\\' && c != '\r' && c != '\n')
c = get();
if (c <= 0 || c == '\r' || c == '\n') {
while (c == '\r' || c == '\n')
c = get();
// we reached the end of the comment
break;
} else {
// it's a '\', so we need to keep going, after skipping what's escaped
// read the skipped character
c = get();
// if it's a two-character newline, skip both characters
if (c == '\r' && peek() == '\n')
get();
c = get();
}
} while (true);
// put back the last non-comment character
if (c > 0)
unget();
return true;
} else if (c == '*') {
// a '/*' style comment
get(); // consume the '*'
c = get();
do {
while (c > 0 && c != '*')
c = get();
if (c == '*') {
c = get();
if (c == '/')
break; // end of comment
// not end of comment
} else // end of input
break;
} while (true);
return true;
} else {
// it's not a comment, put the '/' back
unget();
return false;
}
}
// skip whitespace, then skip a comment, rinse, repeat
void TInputScanner::consumeWhitespaceComment(bool& foundNonSpaceTab)
{
do {
consumeWhiteSpace(foundNonSpaceTab);
// if not starting a comment now, then done
char c = peek();
if (c != '/' || c < 0)
return;
// skip potential comment
foundNonSpaceTab = true;
if (! consumeComment())
return;
} while (true);
}
// Returns true if there was non-white space (e.g., a comment, newline) before the #version
// or no #version was found; otherwise, returns false. There is no error case, it always
// succeeds, but will leave version == 0 if no #version was found.
//
// N.B. does not attempt to leave input in any particular known state. The assumption
// is that scanning will start anew, following the rules for the chosen version/profile,
// and with a corresponding parsing context.
//
bool TInputScanner::scanVersion(int& version, EProfile& profile)
{
// This function doesn't have to get all the semantics correct,
// just find the #version if there is a correct one present.
// The preprocessor will have the responsibility of getting all the semantics right.
version = 0; // means not found
profile = ENoProfile;
bool foundNonSpaceTab = false;
consumeWhitespaceComment(foundNonSpaceTab);
// #
if (get() != '#')
return true;
// whitespace
char c;
do {
c = get();
} while (c == ' ' || c == '\t');
if ( c != 'v' ||
get() != 'e' ||
get() != 'r' ||
get() != 's' ||
get() != 'i' ||
get() != 'o' ||
get() != 'n')
return true;
// whitespace
do {
c = get();
} while (c == ' ' || c == '\t');
// version number
while (c >= '0' && c <= '9') {
version = 10 * version + (c - '0');
c = get();
}
if (version == 0)
return true;
// whitespace
while (c == ' ' || c == '\t')
c = get();
// profile
const int maxProfileLength = 13; // not including any 0
char profileString[maxProfileLength];
int profileLength;
for (profileLength = 0; profileLength < maxProfileLength; ++profileLength) {
if (c < 0 || c == ' ' || c == '\t' || c == '\n' || c == '\r')
break;
profileString[profileLength] = c;
c = get();
}
if (c > 0 && c != ' ' && c != '\t' && c != '\n' && c != '\r')
return true;
if (profileLength == 2 && strncmp(profileString, "es", profileLength) == 0)
profile = EEsProfile;
else if (profileLength == 4 && strncmp(profileString, "core", profileLength) == 0)
profile = ECoreProfile;
else if (profileLength == 13 && strncmp(profileString, "compatibility", profileLength) == 0)
profile = ECompatibilityProfile;
return foundNonSpaceTab;
}
// Fill this in when doing glslang-level scanning, to hand back to the parser.
class TParserToken {
public:
explicit TParserToken(YYSTYPE& b) : sType(b) { }
YYSTYPE& sType;
};
} // end namespace glslang
// This is the function the glslang parser (i.e., bison) calls to get its next token
int yylex(YYSTYPE* glslangTokenDesc, glslang::TParseContext& parseContext)
{
glslang::TParserToken token(*glslangTokenDesc);
return parseContext.getScanContext()->tokenize(parseContext.getPpContext(), token);
}
namespace {
// A single global usable by all threads, by all versions, by all languages.
// After a single process-level initialization, this is read only and thread safe
std::map<std::string, int>* KeywordMap = 0;
std::set<std::string>* ReservedSet = 0;
};
namespace glslang {
void TScanContext::fillInKeywordMap()
{
if (KeywordMap != 0) {
// this is really an error, as this should called only once per process
// but, the only risk is if two threads called simultaneously
return;
}
KeywordMap = new std::map<std::string, int>;
(*KeywordMap)["const"] = CONST;
(*KeywordMap)["uniform"] = UNIFORM;
(*KeywordMap)["in"] = IN;
(*KeywordMap)["out"] = OUT;
(*KeywordMap)["inout"] = INOUT;
(*KeywordMap)["struct"] = STRUCT;
(*KeywordMap)["break"] = BREAK;
(*KeywordMap)["continue"] = CONTINUE;
(*KeywordMap)["do"] = DO;
(*KeywordMap)["for"] = FOR;
(*KeywordMap)["while"] = WHILE;
(*KeywordMap)["switch"] = SWITCH;
(*KeywordMap)["case"] = CASE;
(*KeywordMap)["default"] = DEFAULT;
(*KeywordMap)["if"] = IF;
(*KeywordMap)["else"] = ELSE;
(*KeywordMap)["discard"] = DISCARD;
(*KeywordMap)["return"] = RETURN;
(*KeywordMap)["void"] = VOID;
(*KeywordMap)["bool"] = BOOL;
(*KeywordMap)["float"] = FLOAT;
(*KeywordMap)["int"] = INT;
(*KeywordMap)["bvec2"] = BVEC2;
(*KeywordMap)["bvec3"] = BVEC3;
(*KeywordMap)["bvec4"] = BVEC4;
(*KeywordMap)["vec2"] = VEC2;
(*KeywordMap)["vec3"] = VEC3;
(*KeywordMap)["vec4"] = VEC4;
(*KeywordMap)["ivec2"] = IVEC2;
(*KeywordMap)["ivec3"] = IVEC3;
(*KeywordMap)["ivec4"] = IVEC4;
(*KeywordMap)["mat2"] = MAT2;
(*KeywordMap)["mat3"] = MAT3;
(*KeywordMap)["mat4"] = MAT4;
(*KeywordMap)["sampler2D"] = SAMPLER2D;
(*KeywordMap)["samplerCube"] = SAMPLERCUBE;
(*KeywordMap)["true"] = BOOLCONSTANT;
(*KeywordMap)["false"] = BOOLCONSTANT;
(*KeywordMap)["attribute"] = ATTRIBUTE;
(*KeywordMap)["varying"] = VARYING;
(*KeywordMap)["buffer"] = BUFFER;
(*KeywordMap)["coherent"] = COHERENT;
(*KeywordMap)["restrict"] = RESTRICT;
(*KeywordMap)["readonly"] = READONLY;
(*KeywordMap)["writeonly"] = WRITEONLY;
(*KeywordMap)["atomic_uint"] = ATOMIC_UINT;
(*KeywordMap)["volatile"] = VOLATILE;
(*KeywordMap)["layout"] = LAYOUT;
(*KeywordMap)["shared"] = SHARED;
(*KeywordMap)["patch"] = PATCH;
(*KeywordMap)["sample"] = SAMPLE;
(*KeywordMap)["subroutine"] = SUBROUTINE;
(*KeywordMap)["highp"] = HIGH_PRECISION;
(*KeywordMap)["mediump"] = MEDIUM_PRECISION;
(*KeywordMap)["lowp"] = LOW_PRECISION;
(*KeywordMap)["precision"] = PRECISION;
(*KeywordMap)["mat2x2"] = MAT2X2;
(*KeywordMap)["mat2x3"] = MAT2X3;
(*KeywordMap)["mat2x4"] = MAT2X4;
(*KeywordMap)["mat3x2"] = MAT3X2;
(*KeywordMap)["mat3x3"] = MAT3X3;
(*KeywordMap)["mat3x4"] = MAT3X4;
(*KeywordMap)["mat4x2"] = MAT4X2;
(*KeywordMap)["mat4x3"] = MAT4X3;
(*KeywordMap)["mat4x4"] = MAT4X4;
(*KeywordMap)["dmat2"] = DMAT2;
(*KeywordMap)["dmat3"] = DMAT3;
(*KeywordMap)["dmat4"] = DMAT4;
(*KeywordMap)["dmat2x2"] = DMAT2X2;
(*KeywordMap)["dmat2x3"] = DMAT2X3;
(*KeywordMap)["dmat2x4"] = DMAT2X4;
(*KeywordMap)["dmat3x2"] = DMAT3X2;
(*KeywordMap)["dmat3x3"] = DMAT3X3;
(*KeywordMap)["dmat3x4"] = DMAT3X4;
(*KeywordMap)["dmat4x2"] = DMAT4X2;
(*KeywordMap)["dmat4x3"] = DMAT4X3;
(*KeywordMap)["dmat4x4"] = DMAT4X4;
(*KeywordMap)["image1D"] = IMAGE1D;
(*KeywordMap)["iimage1D"] = IIMAGE1D;
(*KeywordMap)["uimage1D"] = UIMAGE1D;
(*KeywordMap)["image2D"] = IMAGE2D;
(*KeywordMap)["iimage2D"] = IIMAGE2D;
(*KeywordMap)["uimage2D"] = UIMAGE2D;
(*KeywordMap)["image3D"] = IMAGE3D;
(*KeywordMap)["iimage3D"] = IIMAGE3D;
(*KeywordMap)["uimage3D"] = UIMAGE3D;
(*KeywordMap)["image2DRect"] = IMAGE2DRECT;
(*KeywordMap)["iimage2DRect"] = IIMAGE2DRECT;
(*KeywordMap)["uimage2DRect"] = UIMAGE2DRECT;
(*KeywordMap)["imageCube"] = IMAGECUBE;
(*KeywordMap)["iimageCube"] = IIMAGECUBE;
(*KeywordMap)["uimageCube"] = UIMAGECUBE;
(*KeywordMap)["imageBuffer"] = IMAGEBUFFER;
(*KeywordMap)["iimageBuffer"] = IIMAGEBUFFER;
(*KeywordMap)["uimageBuffer"] = UIMAGEBUFFER;
(*KeywordMap)["image1DArray"] = IMAGE1DARRAY;
(*KeywordMap)["iimage1DArray"] = IIMAGE1DARRAY;
(*KeywordMap)["uimage1DArray"] = UIMAGE1DARRAY;
(*KeywordMap)["image2DArray"] = IMAGE2DARRAY;
(*KeywordMap)["iimage2DArray"] = IIMAGE2DARRAY;
(*KeywordMap)["uimage2DArray"] = UIMAGE2DARRAY;
(*KeywordMap)["imageCubeArray"] = IMAGECUBEARRAY;
(*KeywordMap)["iimageCubeArray"] = IIMAGECUBEARRAY;
(*KeywordMap)["uimageCubeArray"] = UIMAGECUBEARRAY;
(*KeywordMap)["image2DMS"] = IMAGE2DMS;
(*KeywordMap)["iimage2DMS"] = IIMAGE2DMS;
(*KeywordMap)["uimage2DMS"] = UIMAGE2DMS;
(*KeywordMap)["image2DMSArray"] = IMAGE2DMSARRAY;
(*KeywordMap)["iimage2DMSArray"] = IIMAGE2DMSARRAY;
(*KeywordMap)["uimage2DMSArray"] = UIMAGE2DMSARRAY;
(*KeywordMap)["double"] = DOUBLE;
(*KeywordMap)["dvec2"] = DVEC2;
(*KeywordMap)["dvec3"] = DVEC3;
(*KeywordMap)["dvec4"] = DVEC4;
(*KeywordMap)["samplerCubeArray"] = SAMPLERCUBEARRAY;
(*KeywordMap)["samplerCubeArrayShadow"] = SAMPLERCUBEARRAYSHADOW;
(*KeywordMap)["isamplerCubeArray"] = ISAMPLERCUBEARRAY;
(*KeywordMap)["usamplerCubeArray"] = USAMPLERCUBEARRAY;
(*KeywordMap)["sampler1DArrayShadow"] = SAMPLER1DARRAYSHADOW;
(*KeywordMap)["isampler1DArray"] = ISAMPLER1DARRAY;
(*KeywordMap)["usampler1D"] = USAMPLER1D;
(*KeywordMap)["isampler1D"] = ISAMPLER1D;
(*KeywordMap)["usampler1DArray"] = USAMPLER1DARRAY;
(*KeywordMap)["samplerBuffer"] = SAMPLERBUFFER;
(*KeywordMap)["uint"] = UINT;
(*KeywordMap)["uvec2"] = UVEC2;
(*KeywordMap)["uvec3"] = UVEC3;
(*KeywordMap)["uvec4"] = UVEC4;
(*KeywordMap)["samplerCubeShadow"] = SAMPLERCUBESHADOW;
(*KeywordMap)["sampler2DArray"] = SAMPLER2DARRAY;
(*KeywordMap)["sampler2DArrayShadow"] = SAMPLER2DARRAYSHADOW;
(*KeywordMap)["isampler2D"] = ISAMPLER2D;
(*KeywordMap)["isampler3D"] = ISAMPLER3D;
(*KeywordMap)["isamplerCube"] = ISAMPLERCUBE;
(*KeywordMap)["isampler2DArray"] = ISAMPLER2DARRAY;
(*KeywordMap)["usampler2D"] = USAMPLER2D;
(*KeywordMap)["usampler3D"] = USAMPLER3D;
(*KeywordMap)["usamplerCube"] = USAMPLERCUBE;
(*KeywordMap)["usampler2DArray"] = USAMPLER2DARRAY;
(*KeywordMap)["isampler2DRect"] = ISAMPLER2DRECT;
(*KeywordMap)["usampler2DRect"] = USAMPLER2DRECT;
(*KeywordMap)["isamplerBuffer"] = ISAMPLERBUFFER;
(*KeywordMap)["usamplerBuffer"] = USAMPLERBUFFER;
(*KeywordMap)["sampler2DMS"] = SAMPLER2DMS;
(*KeywordMap)["isampler2DMS"] = ISAMPLER2DMS;
(*KeywordMap)["usampler2DMS"] = USAMPLER2DMS;
(*KeywordMap)["sampler2DMSArray"] = SAMPLER2DMSARRAY;
(*KeywordMap)["isampler2DMSArray"] = ISAMPLER2DMSARRAY;
(*KeywordMap)["usampler2DMSArray"] = USAMPLER2DMSARRAY;
(*KeywordMap)["sampler1D"] = SAMPLER1D;
(*KeywordMap)["sampler1DShadow"] = SAMPLER1DSHADOW;
(*KeywordMap)["sampler3D"] = SAMPLER3D;
(*KeywordMap)["sampler2DShadow"] = SAMPLER2DSHADOW;
(*KeywordMap)["sampler2DRect"] = SAMPLER2DRECT;
(*KeywordMap)["sampler2DRectShadow"] = SAMPLER2DRECTSHADOW;
(*KeywordMap)["sampler1DArray"] = SAMPLER1DARRAY;
(*KeywordMap)["samplerExternalOES"] = SAMPLEREXTERNALOES; // GL_OES_EGL_image_external
(*KeywordMap)["noperspective"] = NOPERSPECTIVE;
(*KeywordMap)["smooth"] = SMOOTH;
(*KeywordMap)["flat"] = FLAT;
(*KeywordMap)["centroid"] = CENTROID;
(*KeywordMap)["precise"] = PRECISE;
(*KeywordMap)["invariant"] = INVARIANT;
(*KeywordMap)["packed"] = PACKED;
(*KeywordMap)["resource"] = RESOURCE;
(*KeywordMap)["superp"] = SUPERP;
ReservedSet = new std::set<std::string>;
ReservedSet->insert("common");
ReservedSet->insert("partition");
ReservedSet->insert("active");
ReservedSet->insert("asm");
ReservedSet->insert("class");
ReservedSet->insert("union");
ReservedSet->insert("enum");
ReservedSet->insert("typedef");
ReservedSet->insert("template");
ReservedSet->insert("this");
ReservedSet->insert("goto");
ReservedSet->insert("inline");
ReservedSet->insert("noinline");
ReservedSet->insert("public");
ReservedSet->insert("static");
ReservedSet->insert("extern");
ReservedSet->insert("external");
ReservedSet->insert("interface");
ReservedSet->insert("long");
ReservedSet->insert("short");
ReservedSet->insert("half");
ReservedSet->insert("fixed");
ReservedSet->insert("unsigned");
ReservedSet->insert("input");
ReservedSet->insert("output");
ReservedSet->insert("hvec2");
ReservedSet->insert("hvec3");
ReservedSet->insert("hvec4");
ReservedSet->insert("fvec2");
ReservedSet->insert("fvec3");
ReservedSet->insert("fvec4");
ReservedSet->insert("sampler3DRect");
ReservedSet->insert("filter");
ReservedSet->insert("sizeof");
ReservedSet->insert("cast");
ReservedSet->insert("namespace");
ReservedSet->insert("using");
}
int TScanContext::tokenize(TPpContext* pp, TParserToken& token)
{
do {
parserToken = &token;
TPpToken ppToken;
tokenText = pp->tokenize(&ppToken);
if (tokenText == 0)
return 0;
loc = ppToken.loc;
parserToken->sType.lex.loc = loc;
switch (ppToken.token) {
case ';': afterType = false; return SEMICOLON;
case ',': afterType = false; return COMMA;
case ':': return COLON;
case '=': afterType = false; return EQUAL;
case '(': afterType = false; return LEFT_PAREN;
case ')': afterType = false; return RIGHT_PAREN;
case '.': field = true; return DOT;
case '!': return BANG;
case '-': return DASH;
case '~': return TILDE;
case '+': return PLUS;
case '*': return STAR;
case '/': return SLASH;
case '%': return PERCENT;
case '<': return LEFT_ANGLE;
case '>': return RIGHT_ANGLE;
case '|': return VERTICAL_BAR;
case '^': return CARET;
case '&': return AMPERSAND;
case '?': return QUESTION;
case '[': return LEFT_BRACKET;
case ']': return RIGHT_BRACKET;
case '{': return LEFT_BRACE;
case '}': return RIGHT_BRACE;
case '\\':
parseContext.error(loc, "illegal use of escape character", "\\", "");
break;
case CPP_AND_OP: return AND_OP;
case CPP_SUB_ASSIGN: return SUB_ASSIGN;
case CPP_MOD_ASSIGN: return MOD_ASSIGN;
case CPP_ADD_ASSIGN: return ADD_ASSIGN;
case CPP_DIV_ASSIGN: return DIV_ASSIGN;
case CPP_MUL_ASSIGN: return MUL_ASSIGN;
case CPP_EQ_OP: return EQ_OP;
case CPP_XOR_OP: return XOR_OP;
case CPP_GE_OP: return GE_OP;
case CPP_RIGHT_OP: return RIGHT_OP;
case CPP_LE_OP: return LE_OP;
case CPP_LEFT_OP: return LEFT_OP;
case CPP_DEC_OP: return DEC_OP;
case CPP_NE_OP: return NE_OP;
case CPP_OR_OP: return OR_OP;
case CPP_INC_OP: return INC_OP;
case CPP_RIGHT_ASSIGN: return RIGHT_ASSIGN;
case CPP_LEFT_ASSIGN: return LEFT_ASSIGN;
case CPP_AND_ASSIGN: return AND_ASSIGN;
case CPP_OR_ASSIGN: return OR_ASSIGN;
case CPP_XOR_ASSIGN: return XOR_ASSIGN;
case CPP_INTCONSTANT: parserToken->sType.lex.i = ppToken.ival; return INTCONSTANT;
case CPP_UINTCONSTANT: parserToken->sType.lex.i = ppToken.ival; return UINTCONSTANT;
case CPP_FLOATCONSTANT: parserToken->sType.lex.d = ppToken.dval; return FLOATCONSTANT;
case CPP_DOUBLECONSTANT: parserToken->sType.lex.d = ppToken.dval; return DOUBLECONSTANT;
case CPP_IDENTIFIER: return tokenizeIdentifier();
case EOF: return 0;
default:
char buf[2];
buf[0] = ppToken.token;
buf[1] = 0;
parseContext.error(loc, "unexpected token", buf, "");
break;
}
} while (true);
}
int TScanContext::tokenizeIdentifier()
{
if (ReservedSet->find(tokenText) != ReservedSet->end())
return reservedWord();
std::map<std::string, int>::const_iterator it = KeywordMap->find(tokenText);
if (it == KeywordMap->end()) {
// Should have an identifier of some sort
return identifierOrType();
}
keyword = it->second;
field = false;
switch (keyword) {
case CONST:
case UNIFORM:
case IN:
case OUT:
case INOUT:
case STRUCT:
case BREAK:
case CONTINUE:
case DO:
case FOR:
case WHILE:
case IF:
case ELSE:
case DISCARD:
case RETURN:
case CASE:
return keyword;
case SWITCH:
case DEFAULT:
if ((parseContext.profile == EEsProfile && parseContext.version < 300) ||
(parseContext.profile != EEsProfile && parseContext.version < 130))
reservedWord();
return keyword;
case VOID:
case BOOL:
case FLOAT:
case INT:
case BVEC2:
case BVEC3:
case BVEC4:
case VEC2:
case VEC3:
case VEC4:
case IVEC2:
case IVEC3:
case IVEC4:
case MAT2:
case MAT3:
case MAT4:
case SAMPLER2D:
case SAMPLERCUBE:
afterType = true;
return keyword;
case BOOLCONSTANT:
if (strcmp("true", tokenText) == 0)
parserToken->sType.lex.b = true;
else
parserToken->sType.lex.b = false;
return keyword;
case ATTRIBUTE:
case VARYING:
if (parseContext.profile == EEsProfile && parseContext.version >= 300)
reservedWord();
return keyword;
case BUFFER:
if (parseContext.version < 430)
return identifierOrType();
return keyword;
case COHERENT:
case RESTRICT:
case READONLY:
case WRITEONLY:
case ATOMIC_UINT:
return es30ReservedFromGLSL(420);
case VOLATILE:
if (parseContext.profile == EEsProfile || parseContext.version < 420)
reservedWord();
return keyword;
case LAYOUT:
case SHARED:
if ((parseContext.profile == EEsProfile && parseContext.version < 300) ||
(parseContext.profile != EEsProfile && parseContext.version < 140))
return identifierOrType();
return keyword;
case PATCH:
if (parseContext.symbolTable.atBuiltInLevel() || parseContext.extensionsTurnedOn(1, &GL_ARB_tessellation_shader))
return es30ReservedFromGLSL(150);
else
return es30ReservedFromGLSL(400);
case SAMPLE:
case SUBROUTINE:
return es30ReservedFromGLSL(400);
case HIGH_PRECISION:
case MEDIUM_PRECISION:
case LOW_PRECISION:
case PRECISION:
return precisionKeyword();
case MAT2X2:
case MAT2X3:
case MAT2X4:
case MAT3X2:
case MAT3X3:
case MAT3X4:
case MAT4X2:
case MAT4X3:
case MAT4X4:
return matNxM();
case DMAT2:
case DMAT3:
case DMAT4:
case DMAT2X2:
case DMAT2X3:
case DMAT2X4:
case DMAT3X2:
case DMAT3X3:
case DMAT3X4:
case DMAT4X2:
case DMAT4X3:
case DMAT4X4:
return dMat();
case IMAGE1D:
case IIMAGE1D:
case UIMAGE1D:
case IMAGE2D:
case IIMAGE2D:
case UIMAGE2D:
case IMAGE3D:
case IIMAGE3D:
case UIMAGE3D:
case IMAGE2DRECT:
case IIMAGE2DRECT:
case UIMAGE2DRECT:
case IMAGECUBE:
case IIMAGECUBE:
case UIMAGECUBE:
case IMAGEBUFFER:
case IIMAGEBUFFER:
case UIMAGEBUFFER:
case IMAGE1DARRAY:
case IIMAGE1DARRAY:
case UIMAGE1DARRAY:
case IMAGE2DARRAY:
case IIMAGE2DARRAY:
case UIMAGE2DARRAY:
return firstGenerationImage();
case IMAGECUBEARRAY:
case IIMAGECUBEARRAY:
case UIMAGECUBEARRAY:
case IMAGE2DMS:
case IIMAGE2DMS:
case UIMAGE2DMS:
case IMAGE2DMSARRAY:
case IIMAGE2DMSARRAY:
case UIMAGE2DMSARRAY:
return secondGenerationImage();
case DOUBLE:
case DVEC2:
case DVEC3:
case DVEC4:
afterType = true;
if (parseContext.profile == EEsProfile || parseContext.version < 400)
reservedWord();
return keyword;
case SAMPLERCUBEARRAY:
case SAMPLERCUBEARRAYSHADOW:
case ISAMPLERCUBEARRAY:
case USAMPLERCUBEARRAY:
afterType = true;
if (parseContext.profile == EEsProfile || (parseContext.version < 400 && ! parseContext.extensionsTurnedOn(1, &GL_ARB_texture_cube_map_array)))
reservedWord();
return keyword;
case ISAMPLER1D:
case ISAMPLER1DARRAY:
case SAMPLER1DARRAYSHADOW:
case USAMPLER1D:
case USAMPLER1DARRAY:
case SAMPLERBUFFER:
afterType = true;
return es30ReservedFromGLSL(130);
case UINT:
case UVEC2:
case UVEC3:
case UVEC4:
case SAMPLERCUBESHADOW:
case SAMPLER2DARRAY:
case SAMPLER2DARRAYSHADOW:
case ISAMPLER2D:
case ISAMPLER3D:
case ISAMPLERCUBE:
case ISAMPLER2DARRAY:
case USAMPLER2D:
case USAMPLER3D:
case USAMPLERCUBE:
case USAMPLER2DARRAY:
afterType = true;
return nonreservedKeyword(300, 130);
case ISAMPLER2DRECT:
case USAMPLER2DRECT:
case ISAMPLERBUFFER:
case USAMPLERBUFFER:
afterType = true;
return es30ReservedFromGLSL(140);
case SAMPLER2DMS:
case ISAMPLER2DMS:
case USAMPLER2DMS:
case SAMPLER2DMSARRAY:
case ISAMPLER2DMSARRAY:
case USAMPLER2DMSARRAY:
afterType = true;
return es30ReservedFromGLSL(150);
case SAMPLER1D:
case SAMPLER1DSHADOW:
afterType = true;
if (parseContext.profile == EEsProfile)
reservedWord();
return keyword;
case SAMPLER3D:
afterType = true;
if (parseContext.profile == EEsProfile && parseContext.version < 300) {
if (! parseContext.extensionsTurnedOn(1, &GL_OES_texture_3D))
reservedWord();
}
return keyword;
case SAMPLER2DSHADOW:
afterType = true;
if (parseContext.profile == EEsProfile && parseContext.version < 300)
reservedWord();
return keyword;
case SAMPLER2DRECT:
case SAMPLER2DRECTSHADOW:
afterType = true;
if (parseContext.profile == EEsProfile)
reservedWord();
else if (parseContext.version < 140 && ! parseContext.symbolTable.atBuiltInLevel() && ! parseContext.extensionsTurnedOn(1, &GL_ARB_texture_rectangle))
reservedWord();
return keyword;
case SAMPLER1DARRAY:
afterType = true;
if (parseContext.profile == EEsProfile && parseContext.version == 300)
reservedWord();
else if ((parseContext.profile == EEsProfile && parseContext.version < 300) ||
(parseContext.profile != EEsProfile && parseContext.version < 130))
return identifierOrType();
return keyword;
case SAMPLEREXTERNALOES:
afterType = true;
if (parseContext.symbolTable.atBuiltInLevel() || parseContext.extensionsTurnedOn(1, &GL_OES_EGL_image_external))
return keyword;
return identifierOrType();
case NOPERSPECTIVE:
return es30ReservedFromGLSL(130);
case SMOOTH:
if ((parseContext.profile == EEsProfile && parseContext.version < 300) ||
(parseContext.profile != EEsProfile && parseContext.version < 130))
return identifierOrType();
return keyword;
case FLAT:
if (parseContext.profile == EEsProfile && parseContext.version < 300)
reservedWord();
else if (parseContext.profile != EEsProfile && parseContext.version < 130)
return identifierOrType();
return keyword;
case CENTROID:
if (parseContext.version < 120)
return identifierOrType();
return keyword;
case PRECISE:
if (parseContext.profile == EEsProfile ||
(parseContext.profile != EEsProfile && parseContext.version < 400))
return identifierOrType();
return keyword;
case INVARIANT:
if (parseContext.profile != EEsProfile && parseContext.version < 120)
return identifierOrType();
return keyword;
case PACKED:
if ((parseContext.profile == EEsProfile && parseContext.version < 300) ||
(parseContext.profile != EEsProfile && parseContext.version < 330))
return reservedWord();
return identifierOrType();
case RESOURCE:
{
bool reserved = (parseContext.profile == EEsProfile && parseContext.version >= 300) ||
(parseContext.profile != EEsProfile && parseContext.version >= 420);
return identifierOrReserved(reserved);
}
case SUPERP:
{
bool reserved = parseContext.profile == EEsProfile || parseContext.version >= 130;
return identifierOrReserved(reserved);
}
default:
parseContext.infoSink.info.message(EPrefixInternalError, "Unknown glslang keyword", loc);
return 0;
}
}
int TScanContext::identifierOrType()
{
parserToken->sType.lex.string = NewPoolTString(tokenText);
if (field) {
field = false;
return FIELD_SELECTION;
}
parserToken->sType.lex.symbol = parseContext.symbolTable.find(*parserToken->sType.lex.string);
if (afterType == false && parserToken->sType.lex.symbol) {
if (const TVariable* variable = parserToken->sType.lex.symbol->getAsVariable()) {
if (variable->isUserType()) {
afterType = true;
return TYPE_NAME;
}
}
}
return IDENTIFIER;
}
// Give an error for use of a reserved symbol.
// However, allow built-in declarations to use reserved words, to allow
// extension support before the extension is enabled.
int TScanContext::reservedWord()
{
if (! parseContext.symbolTable.atBuiltInLevel())
parseContext.error(loc, "Reserved word.", tokenText, "", "");
return 0;
}
int TScanContext::identifierOrReserved(bool reserved)
{
if (reserved) {
reservedWord();
return 0;
}
if (parseContext.forwardCompatible)
parseContext.warn(loc, "using future reserved keyword", tokenText, "");
return identifierOrType();
}
// For keywords that suddenly showed up on non-ES (not previously reserved)
// but then got reserved by ES 3.0.
int TScanContext::es30ReservedFromGLSL(int version)
{
if ((parseContext.profile == EEsProfile && parseContext.version < 300) ||
(parseContext.profile != EEsProfile && parseContext.version < version)) {
if (parseContext.forwardCompatible)
parseContext.warn(loc, "future reserved word in ES 300 and keyword in GLSL", tokenText, "");
return identifierOrType();
} else if (parseContext.profile == EEsProfile && parseContext.version >= 300)
reservedWord();
return keyword;
}
// For a keyword that was never reserved, until it suddenly
// showed up, both in an es version and a non-ES version.
int TScanContext::nonreservedKeyword(int esVersion, int nonEsVersion)
{
if ((parseContext.profile == EEsProfile && parseContext.version < esVersion) ||
(parseContext.profile != EEsProfile && parseContext.version < nonEsVersion)) {
if (parseContext.forwardCompatible)
parseContext.warn(loc, "using future keyword", tokenText, "");
return identifierOrType();
}
return keyword;
}
int TScanContext::precisionKeyword()
{
if (parseContext.profile == EEsProfile || parseContext.version >= 130)
return keyword;
if (parseContext.forwardCompatible)
parseContext.warn(loc, "using ES precision qualifier keyword", tokenText, "");
return identifierOrType();
}
int TScanContext::matNxM()
{
afterType = true;
if (parseContext.version > 110)
return keyword;
if (parseContext.forwardCompatible)
parseContext.warn(loc, "using future non-square matrix type keyword", tokenText, "");
return identifierOrType();
}
int TScanContext::dMat()
{
afterType = true;
if (parseContext.profile == EEsProfile && parseContext.version >= 300) {
reservedWord();
return keyword;
}
if (parseContext.profile != EEsProfile && parseContext.version >= 400)
return keyword;
if (parseContext.forwardCompatible)
parseContext.warn(loc, "using future type keyword", tokenText, "");
return identifierOrType();
}
int TScanContext::firstGenerationImage()
{
afterType = true;
if (parseContext.profile != EEsProfile && parseContext.version >= 420)
return keyword;
if ((parseContext.profile == EEsProfile && parseContext.version >= 300) ||
(parseContext.profile != EEsProfile && parseContext.version >= 130)) {
reservedWord();
return keyword;
}
if (parseContext.forwardCompatible)
parseContext.warn(loc, "using future type keyword", tokenText, "");
return identifierOrType();
}
int TScanContext::secondGenerationImage()
{
afterType = true;
if (parseContext.profile != EEsProfile && parseContext.version >= 420)
return keyword;
if (parseContext.forwardCompatible)
parseContext.warn(loc, "using future type keyword", tokenText, "");
return identifierOrType();
}
} // end namespace glslang
Reference in New Issue View Git Blame Copy Permalink