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//
// Copyright (C) 2016 Google, Inc.
// Copyright (C) 2016 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 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.
//
//
// This is a set of mutually recursive methods implementing the HLSL grammar.
// Generally, each returns
// - through an argument: a type specifically appropriate to which rule it
// recognized
// - through the return value: true/false to indicate whether or not it
// recognized its rule
//
// As much as possible, only grammar recognition should happen in this file,
// with all other work being farmed out to hlslParseHelper.cpp, which in turn
// will build the AST.
//
// The next token, yet to be "accepted" is always sitting in 'token'.
// When a method says it accepts a rule, that means all tokens involved
// in the rule will have been consumed, and none left in 'token'.
//
#include "hlslTokens.h"
#include "hlslGrammar.h"
#include "hlslAttributes.h"
namespace glslang {
// Root entry point to this recursive decent parser.
// Return true if compilation unit was successfully accepted.
bool HlslGrammar::parse()
{
advanceToken();
return acceptCompilationUnit();
}
void HlslGrammar::expected(const char* syntax)
{
parseContext.error(token.loc, "Expected", syntax, "");
}
void HlslGrammar::unimplemented(const char* error)
{
parseContext.error(token.loc, "Unimplemented", error, "");
}
// IDENTIFIER
// THIS
// type that can be used as IDENTIFIER
//
// Only process the next token if it is an identifier.
// Return true if it was an identifier.
bool HlslGrammar::acceptIdentifier(HlslToken& idToken)
{
// IDENTIFIER
if (peekTokenClass(EHTokIdentifier)) {
idToken = token;
advanceToken();
return true;
}
// THIS
// -> maps to the IDENTIFIER spelled with the internal special name for 'this'
if (peekTokenClass(EHTokThis)) {
idToken = token;
advanceToken();
idToken.tokenClass = EHTokIdentifier;
idToken.string = NewPoolTString(intermediate.implicitThisName);
return true;
}
// type that can be used as IDENTIFIER
// Even though "sample", "bool", "float", etc keywords (for types, interpolation modifiers),
// they ARE still accepted as identifiers. This is not a dense space: e.g, "void" is not a
// valid identifier, nor is "linear". This code special cases the known instances of this, so
// e.g, "int sample;" or "float float;" is accepted. Other cases can be added here if needed.
const char* idString = getTypeString(peek());
if (idString == nullptr)
return false;
token.string = NewPoolTString(idString);
token.tokenClass = EHTokIdentifier;
idToken = token;
typeIdentifiers = true;
advanceToken();
return true;
}
// compilationUnit
// : declaration_list EOF
//
bool HlslGrammar::acceptCompilationUnit()
{
TIntermNode* unitNode = nullptr;
if (! acceptDeclarationList(unitNode))
return false;
if (! peekTokenClass(EHTokNone))
return false;
// set root of AST
if (unitNode && !unitNode->getAsAggregate())
unitNode = intermediate.growAggregate(nullptr, unitNode);
intermediate.setTreeRoot(unitNode);
return true;
}
// Recognize the following, but with the extra condition that it can be
// successfully terminated by EOF or '}'.
//
// declaration_list
// : list of declaration_or_semicolon followed by EOF or RIGHT_BRACE
//
// declaration_or_semicolon
// : declaration
// : SEMICOLON
//
bool HlslGrammar::acceptDeclarationList(TIntermNode*& nodeList)
{
do {
// HLSL allows extra semicolons between global declarations
do { } while (acceptTokenClass(EHTokSemicolon));
// EOF or RIGHT_BRACE
if (peekTokenClass(EHTokNone) || peekTokenClass(EHTokRightBrace))
return true;
// declaration
if (! acceptDeclaration(nodeList))
return false;
} while (true);
return true;
}
// sampler_state
// : LEFT_BRACE [sampler_state_assignment ... ] RIGHT_BRACE
//
// sampler_state_assignment
// : sampler_state_identifier EQUAL value SEMICOLON
//
// sampler_state_identifier
// : ADDRESSU
// | ADDRESSV
// | ADDRESSW
// | BORDERCOLOR
// | FILTER
// | MAXANISOTROPY
// | MAXLOD
// | MINLOD
// | MIPLODBIAS
//
bool HlslGrammar::acceptSamplerState()
{
// TODO: this should be genericized to accept a list of valid tokens and
// return token/value pairs. Presently it is specific to texture values.
if (! acceptTokenClass(EHTokLeftBrace))
return true;
parseContext.warn(token.loc, "unimplemented", "immediate sampler state", "");
do {
// read state name
HlslToken state;
if (! acceptIdentifier(state))
break; // end of list
// FXC accepts any case
TString stateName = *state.string;
std::transform(stateName.begin(), stateName.end(), stateName.begin(), ::tolower);
if (! acceptTokenClass(EHTokAssign)) {
expected("assign");
return false;
}
if (stateName == "minlod" || stateName == "maxlod") {
if (! peekTokenClass(EHTokIntConstant)) {
expected("integer");
return false;
}
TIntermTyped* lod = nullptr;
if (! acceptLiteral(lod)) // should never fail, since we just looked for an integer
return false;
} else if (stateName == "maxanisotropy") {
if (! peekTokenClass(EHTokIntConstant)) {
expected("integer");
return false;
}
TIntermTyped* maxAnisotropy = nullptr;
if (! acceptLiteral(maxAnisotropy)) // should never fail, since we just looked for an integer
return false;
} else if (stateName == "filter") {
HlslToken filterMode;
if (! acceptIdentifier(filterMode)) {
expected("filter mode");
return false;
}
} else if (stateName == "addressu" || stateName == "addressv" || stateName == "addressw") {
HlslToken addrMode;
if (! acceptIdentifier(addrMode)) {
expected("texture address mode");
return false;
}
} else if (stateName == "miplodbias") {
TIntermTyped* lodBias = nullptr;
if (! acceptLiteral(lodBias)) {
expected("lod bias");
return false;
}
} else if (stateName == "bordercolor") {
return false;
} else {
expected("texture state");
return false;
}
// SEMICOLON
if (! acceptTokenClass(EHTokSemicolon)) {
expected("semicolon");
return false;
}
} while (true);
if (! acceptTokenClass(EHTokRightBrace))
return false;
return true;
}
// sampler_declaration_dx9
// : SAMPLER identifier EQUAL sampler_type sampler_state
//
bool HlslGrammar::acceptSamplerDeclarationDX9(TType& /*type*/)
{
if (! acceptTokenClass(EHTokSampler))
return false;
// TODO: remove this when DX9 style declarations are implemented.
unimplemented("Direct3D 9 sampler declaration");
// read sampler name
HlslToken name;
if (! acceptIdentifier(name)) {
expected("sampler name");
return false;
}
if (! acceptTokenClass(EHTokAssign)) {
expected("=");
return false;
}
return false;
}
// declaration
// : attributes attributed_declaration
// | NAMESPACE IDENTIFIER LEFT_BRACE declaration_list RIGHT_BRACE
//
// attributed_declaration
// : sampler_declaration_dx9 post_decls SEMICOLON
// | fully_specified_type // for cbuffer/tbuffer
// | fully_specified_type declarator_list SEMICOLON // for non cbuffer/tbuffer
// | fully_specified_type identifier function_parameters post_decls compound_statement // function definition
// | fully_specified_type identifier sampler_state post_decls compound_statement // sampler definition
// | typedef declaration
//
// declarator_list
// : declarator COMMA declarator COMMA declarator... // zero or more declarators
//
// declarator
// : identifier array_specifier post_decls
// | identifier array_specifier post_decls EQUAL assignment_expression
// | identifier function_parameters post_decls // function prototype
//
// Parsing has to go pretty far in to know whether it's a variable, prototype, or
// function definition, so the implementation below doesn't perfectly divide up the grammar
// as above. (The 'identifier' in the first item in init_declarator list is the
// same as 'identifier' for function declarations.)
//
// This can generate more than one subtree, one per initializer or a function body.
// All initializer subtrees are put in their own aggregate node, making one top-level
// node for all the initializers. Each function created is a top-level node to grow
// into the passed-in nodeList.
//
// If 'nodeList' is passed in as non-null, it must an aggregate to extend for
// each top-level node the declaration creates. Otherwise, if only one top-level
// node in generated here, that is want is returned in nodeList.
//
bool HlslGrammar::acceptDeclaration(TIntermNode*& nodeList)
{
// NAMESPACE IDENTIFIER LEFT_BRACE declaration_list RIGHT_BRACE
if (acceptTokenClass(EHTokNamespace)) {
HlslToken namespaceToken;
if (!acceptIdentifier(namespaceToken)) {
expected("namespace name");
return false;
}
parseContext.pushNamespace(*namespaceToken.string);
if (!acceptTokenClass(EHTokLeftBrace)) {
expected("{");
return false;
}
if (!acceptDeclarationList(nodeList)) {
expected("declaration list");
return false;
}
if (!acceptTokenClass(EHTokRightBrace)) {
expected("}");
return false;
}
parseContext.popNamespace();
return true;
}
bool declarator_list = false; // true when processing comma separation
// attributes
TFunctionDeclarator declarator;
acceptAttributes(declarator.attributes);
// typedef
bool typedefDecl = acceptTokenClass(EHTokTypedef);
TType declaredType;
// DX9 sampler declaration use a different syntax
// DX9 shaders need to run through HLSL compiler (fxc) via a back compat mode, it isn't going to
// be possible to simultaneously compile D3D10+ style shaders and DX9 shaders. If we want to compile DX9
// HLSL shaders, this will have to be a master level switch
// As such, the sampler keyword in D3D10+ turns into an automatic sampler type, and is commonly used
// For that reason, this line is commented out
// if (acceptSamplerDeclarationDX9(declaredType))
// return true;
bool forbidDeclarators = (peekTokenClass(EHTokCBuffer) || peekTokenClass(EHTokTBuffer));
// fully_specified_type
if (! acceptFullySpecifiedType(declaredType, nodeList, declarator.attributes, forbidDeclarators))
return false;
// cbuffer and tbuffer end with the closing '}'.
// No semicolon is included.
if (forbidDeclarators)
return true;
// declarator_list
// : declarator
// : identifier
HlslToken idToken;
TIntermAggregate* initializers = nullptr;
while (acceptIdentifier(idToken)) {
TString *fullName = idToken.string;
if (parseContext.symbolTable.atGlobalLevel())
parseContext.getFullNamespaceName(fullName);
if (peekTokenClass(EHTokLeftParen)) {
// looks like function parameters
// merge in the attributes into the return type
parseContext.transferTypeAttributes(token.loc, declarator.attributes, declaredType, true);
// Potentially rename shader entry point function. No-op most of the time.
parseContext.renameShaderFunction(fullName);
// function_parameters
declarator.function = new TFunction(fullName, declaredType);
if (!acceptFunctionParameters(*declarator.function)) {
expected("function parameter list");
return false;
}
// post_decls
acceptPostDecls(declarator.function->getWritableType().getQualifier());
// compound_statement (function body definition) or just a prototype?
declarator.loc = token.loc;
if (peekTokenClass(EHTokLeftBrace)) {
if (declarator_list)
parseContext.error(idToken.loc, "function body can't be in a declarator list", "{", "");
if (typedefDecl)
parseContext.error(idToken.loc, "function body can't be in a typedef", "{", "");
return acceptFunctionDefinition(declarator, nodeList, nullptr);
} else {
if (typedefDecl)
parseContext.error(idToken.loc, "function typedefs not implemented", "{", "");
parseContext.handleFunctionDeclarator(declarator.loc, *declarator.function, true);
}
} else {
// A variable declaration.
// merge in the attributes, the first time around, into the shared type
if (! declarator_list)
parseContext.transferTypeAttributes(token.loc, declarator.attributes, declaredType);
// Fix the storage qualifier if it's a global.
if (declaredType.getQualifier().storage == EvqTemporary && parseContext.symbolTable.atGlobalLevel())
declaredType.getQualifier().storage = EvqUniform;
// recognize array_specifier
TArraySizes* arraySizes = nullptr;
acceptArraySpecifier(arraySizes);
// We can handle multiple variables per type declaration, so
// the number of types can expand when arrayness is different.
TType variableType;
variableType.shallowCopy(declaredType);
// In the most general case, arrayness is potentially coming both from the
// declared type and from the variable: "int[] a[];" or just one or the other.
// Merge it all to the variableType, so all arrayness is part of the variableType.
variableType.transferArraySizes(arraySizes);
variableType.copyArrayInnerSizes(declaredType.getArraySizes());
// samplers accept immediate sampler state
if (variableType.getBasicType() == EbtSampler) {
if (! acceptSamplerState())
return false;
}
// post_decls
acceptPostDecls(variableType.getQualifier());
// EQUAL assignment_expression
TIntermTyped* expressionNode = nullptr;
if (acceptTokenClass(EHTokAssign)) {
if (typedefDecl)
parseContext.error(idToken.loc, "can't have an initializer", "typedef", "");
if (! acceptAssignmentExpression(expressionNode)) {
expected("initializer");
return false;
}
}
// TODO: things scoped within an annotation need their own name space;
// TODO: strings are not yet handled.
if (variableType.getBasicType() != EbtString && parseContext.getAnnotationNestingLevel() == 0) {
if (typedefDecl)
parseContext.declareTypedef(idToken.loc, *fullName, variableType);
else if (variableType.getBasicType() == EbtBlock) {
if (expressionNode)
parseContext.error(idToken.loc, "buffer aliasing not yet supported", "block initializer", "");
parseContext.declareBlock(idToken.loc, variableType, fullName);
parseContext.declareStructBufferCounter(idToken.loc, variableType, *fullName);
} else {
if (variableType.getQualifier().storage == EvqUniform && ! variableType.containsOpaque()) {
// this isn't really an individual variable, but a member of the $Global buffer
parseContext.growGlobalUniformBlock(idToken.loc, variableType, *fullName);
} else {
// Declare the variable and add any initializer code to the AST.
// The top-level node is always made into an aggregate, as that's
// historically how the AST has been.
initializers = intermediate.growAggregate(initializers,
parseContext.declareVariable(idToken.loc, *fullName, variableType, expressionNode),
idToken.loc);
}
}
}
}
// COMMA
if (acceptTokenClass(EHTokComma))
declarator_list = true;
}
// The top-level initializer node is a sequence.
if (initializers != nullptr)
initializers->setOperator(EOpSequence);
// Add the initializers' aggregate to the nodeList we were handed.
if (nodeList)
nodeList = intermediate.growAggregate(nodeList, initializers);
else
nodeList = initializers;
// SEMICOLON
if (! acceptTokenClass(EHTokSemicolon)) {
// This may have been a false detection of what appeared to be a declaration, but
// was actually an assignment such as "float = 4", where "float" is an identifier.
// We put the token back to let further parsing happen for cases where that may
// happen. This errors on the side of caution, and mostly triggers the error.
if (peek() == EHTokAssign || peek() == EHTokLeftBracket || peek() == EHTokDot || peek() == EHTokComma) {
recedeToken();
return false;
} else {
expected(";");
return false;
}
}
return true;
}
// control_declaration
// : fully_specified_type identifier EQUAL expression
//
bool HlslGrammar::acceptControlDeclaration(TIntermNode*& node)
{
node = nullptr;
TAttributes attributes;
// fully_specified_type
TType type;
if (! acceptFullySpecifiedType(type, attributes))
return false;
if (attributes.size() > 0)
parseContext.warn(token.loc, "attributes don't apply to control declaration", "", "");
// filter out type casts
if (peekTokenClass(EHTokLeftParen)) {
recedeToken();
return false;
}
// identifier
HlslToken idToken;
if (! acceptIdentifier(idToken)) {
expected("identifier");
return false;
}
// EQUAL
TIntermTyped* expressionNode = nullptr;
if (! acceptTokenClass(EHTokAssign)) {
expected("=");
return false;
}
// expression
if (! acceptExpression(expressionNode)) {
expected("initializer");
return false;
}
node = parseContext.declareVariable(idToken.loc, *idToken.string, type, expressionNode);
return true;
}
// fully_specified_type
// : type_specifier
// | type_qualifier type_specifier
//
bool HlslGrammar::acceptFullySpecifiedType(TType& type, const TAttributes& attributes)
{
TIntermNode* nodeList = nullptr;
return acceptFullySpecifiedType(type, nodeList, attributes);
}
bool HlslGrammar::acceptFullySpecifiedType(TType& type, TIntermNode*& nodeList, const TAttributes& attributes, bool forbidDeclarators)
{
// type_qualifier
TQualifier qualifier;
qualifier.clear();
if (! acceptQualifier(qualifier))
return false;
TSourceLoc loc = token.loc;
// type_specifier
if (! acceptType(type, nodeList)) {
// If this is not a type, we may have inadvertently gone down a wrong path
// by parsing "sample", which can be treated like either an identifier or a
// qualifier. Back it out, if we did.
if (qualifier.sample)
recedeToken();
return false;
}
if (type.getBasicType() == EbtBlock) {
// the type was a block, which set some parts of the qualifier
parseContext.mergeQualifiers(type.getQualifier(), qualifier);
// merge in the attributes
parseContext.transferTypeAttributes(token.loc, attributes, type);
// further, it can create an anonymous instance of the block
// (cbuffer and tbuffer don't consume the next identifier, and
// should set forbidDeclarators)
if (forbidDeclarators || peek() != EHTokIdentifier)
parseContext.declareBlock(loc, type);
} else {
// Some qualifiers are set when parsing the type. Merge those with
// whatever comes from acceptQualifier.
assert(qualifier.layoutFormat == ElfNone);
qualifier.layoutFormat = type.getQualifier().layoutFormat;
qualifier.precision = type.getQualifier().precision;
if (type.getQualifier().storage == EvqOut ||
type.getQualifier().storage == EvqBuffer) {
qualifier.storage = type.getQualifier().storage;
qualifier.readonly = type.getQualifier().readonly;
}
if (type.isBuiltIn())
qualifier.builtIn = type.getQualifier().builtIn;
type.getQualifier() = qualifier;
}
return true;
}
// type_qualifier
// : qualifier qualifier ...
//
// Zero or more of these, so this can't return false.
//
bool HlslGrammar::acceptQualifier(TQualifier& qualifier)
{
do {
switch (peek()) {
case EHTokStatic:
qualifier.storage = parseContext.symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary;
break;
case EHTokExtern:
// TODO: no meaning in glslang?
break;
case EHTokShared:
// TODO: hint
break;
case EHTokGroupShared:
qualifier.storage = EvqShared;
break;
case EHTokUniform:
qualifier.storage = EvqUniform;
break;
case EHTokConst:
qualifier.storage = EvqConst;
break;
case EHTokVolatile:
qualifier.volatil = true;
break;
case EHTokLinear:
qualifier.smooth = true;
break;
case EHTokCentroid:
qualifier.centroid = true;
break;
case EHTokNointerpolation:
qualifier.flat = true;
break;
case EHTokNoperspective:
qualifier.nopersp = true;
break;
case EHTokSample:
qualifier.sample = true;
break;
case EHTokRowMajor:
qualifier.layoutMatrix = ElmColumnMajor;
break;
case EHTokColumnMajor:
qualifier.layoutMatrix = ElmRowMajor;
break;
case EHTokPrecise:
qualifier.noContraction = true;
break;
case EHTokIn:
qualifier.storage = (qualifier.storage == EvqOut) ? EvqInOut : EvqIn;
break;
case EHTokOut:
qualifier.storage = (qualifier.storage == EvqIn) ? EvqInOut : EvqOut;
break;
case EHTokInOut:
qualifier.storage = EvqInOut;
break;
case EHTokLayout:
if (! acceptLayoutQualifierList(qualifier))
return false;
continue;
case EHTokGloballyCoherent:
qualifier.coherent = true;
break;
case EHTokInline:
// TODO: map this to SPIR-V function control
break;
// GS geometries: these are specified on stage input variables, and are an error (not verified here)
// for output variables.
case EHTokPoint:
qualifier.storage = EvqIn;
if (!parseContext.handleInputGeometry(token.loc, ElgPoints))
return false;
break;
case EHTokLine:
qualifier.storage = EvqIn;
if (!parseContext.handleInputGeometry(token.loc, ElgLines))
return false;
break;
case EHTokTriangle:
qualifier.storage = EvqIn;
if (!parseContext.handleInputGeometry(token.loc, ElgTriangles))
return false;
break;
case EHTokLineAdj:
qualifier.storage = EvqIn;
if (!parseContext.handleInputGeometry(token.loc, ElgLinesAdjacency))
return false;
break;
case EHTokTriangleAdj:
qualifier.storage = EvqIn;
if (!parseContext.handleInputGeometry(token.loc, ElgTrianglesAdjacency))
return false;
break;
default:
return true;
}
advanceToken();
} while (true);
}
// layout_qualifier_list
// : LAYOUT LEFT_PAREN layout_qualifier COMMA layout_qualifier ... RIGHT_PAREN
//
// layout_qualifier
// : identifier
// | identifier EQUAL expression
//
// Zero or more of these, so this can't return false.
//
bool HlslGrammar::acceptLayoutQualifierList(TQualifier& qualifier)
{
if (! acceptTokenClass(EHTokLayout))
return false;
// LEFT_PAREN
if (! acceptTokenClass(EHTokLeftParen))
return false;
do {
// identifier
HlslToken idToken;
if (! acceptIdentifier(idToken))
break;
// EQUAL expression
if (acceptTokenClass(EHTokAssign)) {
TIntermTyped* expr;
if (! acceptConditionalExpression(expr)) {
expected("expression");
return false;
}
parseContext.setLayoutQualifier(idToken.loc, qualifier, *idToken.string, expr);
} else
parseContext.setLayoutQualifier(idToken.loc, qualifier, *idToken.string);
// COMMA
if (! acceptTokenClass(EHTokComma))
break;
} while (true);
// RIGHT_PAREN
if (! acceptTokenClass(EHTokRightParen)) {
expected(")");
return false;
}
return true;
}
// template_type
// : FLOAT
// | DOUBLE
// | INT
// | DWORD
// | UINT
// | BOOL
//
bool HlslGrammar::acceptTemplateVecMatBasicType(TBasicType& basicType)
{
switch (peek()) {
case EHTokFloat:
basicType = EbtFloat;
break;
case EHTokDouble:
basicType = EbtDouble;
break;
case EHTokInt:
case EHTokDword:
basicType = EbtInt;
break;
case EHTokUint:
basicType = EbtUint;
break;
case EHTokBool:
basicType = EbtBool;
break;
default:
return false;
}
advanceToken();
return true;
}
// vector_template_type
// : VECTOR
// | VECTOR LEFT_ANGLE template_type COMMA integer_literal RIGHT_ANGLE
//
bool HlslGrammar::acceptVectorTemplateType(TType& type)
{
if (! acceptTokenClass(EHTokVector))
return false;
if (! acceptTokenClass(EHTokLeftAngle)) {
// in HLSL, 'vector' alone means float4.
new(&type) TType(EbtFloat, EvqTemporary, 4);
return true;
}
TBasicType basicType;
if (! acceptTemplateVecMatBasicType(basicType)) {
expected("scalar type");
return false;
}
// COMMA
if (! acceptTokenClass(EHTokComma)) {
expected(",");
return false;
}
// integer
if (! peekTokenClass(EHTokIntConstant)) {
expected("literal integer");
return false;
}
TIntermTyped* vecSize;
if (! acceptLiteral(vecSize))
return false;
const int vecSizeI = vecSize->getAsConstantUnion()->getConstArray()[0].getIConst();
new(&type) TType(basicType, EvqTemporary, vecSizeI);
if (vecSizeI == 1)
type.makeVector();
if (!acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
return true;
}
// matrix_template_type
// : MATRIX
// | MATRIX LEFT_ANGLE template_type COMMA integer_literal COMMA integer_literal RIGHT_ANGLE
//
bool HlslGrammar::acceptMatrixTemplateType(TType& type)
{
if (! acceptTokenClass(EHTokMatrix))
return false;
if (! acceptTokenClass(EHTokLeftAngle)) {
// in HLSL, 'matrix' alone means float4x4.
new(&type) TType(EbtFloat, EvqTemporary, 0, 4, 4);
return true;
}
TBasicType basicType;
if (! acceptTemplateVecMatBasicType(basicType)) {
expected("scalar type");
return false;
}
// COMMA
if (! acceptTokenClass(EHTokComma)) {
expected(",");
return false;
}
// integer rows
if (! peekTokenClass(EHTokIntConstant)) {
expected("literal integer");
return false;
}
TIntermTyped* rows;
if (! acceptLiteral(rows))
return false;
// COMMA
if (! acceptTokenClass(EHTokComma)) {
expected(",");
return false;
}
// integer cols
if (! peekTokenClass(EHTokIntConstant)) {
expected("literal integer");
return false;
}
TIntermTyped* cols;
if (! acceptLiteral(cols))
return false;
new(&type) TType(basicType, EvqTemporary, 0,
rows->getAsConstantUnion()->getConstArray()[0].getIConst(),
cols->getAsConstantUnion()->getConstArray()[0].getIConst());
if (!acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
return true;
}
// layout_geometry
// : LINESTREAM
// | POINTSTREAM
// | TRIANGLESTREAM
//
bool HlslGrammar::acceptOutputPrimitiveGeometry(TLayoutGeometry& geometry)
{
// read geometry type
const EHlslTokenClass geometryType = peek();
switch (geometryType) {
case EHTokPointStream: geometry = ElgPoints; break;
case EHTokLineStream: geometry = ElgLineStrip; break;
case EHTokTriangleStream: geometry = ElgTriangleStrip; break;
default:
return false; // not a layout geometry
}
advanceToken(); // consume the layout keyword
return true;
}
// tessellation_decl_type
// : INPUTPATCH
// | OUTPUTPATCH
//
bool HlslGrammar::acceptTessellationDeclType(TBuiltInVariable& patchType)
{
// read geometry type
const EHlslTokenClass tessType = peek();
switch (tessType) {
case EHTokInputPatch: patchType = EbvInputPatch; break;
case EHTokOutputPatch: patchType = EbvOutputPatch; break;
default:
return false; // not a tessellation decl
}
advanceToken(); // consume the keyword
return true;
}
// tessellation_patch_template_type
// : tessellation_decl_type LEFT_ANGLE type comma integer_literal RIGHT_ANGLE
//
bool HlslGrammar::acceptTessellationPatchTemplateType(TType& type)
{
TBuiltInVariable patchType;
if (! acceptTessellationDeclType(patchType))
return false;
if (! acceptTokenClass(EHTokLeftAngle))
return false;
if (! acceptType(type)) {
expected("tessellation patch type");
return false;
}
if (! acceptTokenClass(EHTokComma))
return false;
// integer size
if (! peekTokenClass(EHTokIntConstant)) {
expected("literal integer");
return false;
}
TIntermTyped* size;
if (! acceptLiteral(size))
return false;
TArraySizes* arraySizes = new TArraySizes;
arraySizes->addInnerSize(size->getAsConstantUnion()->getConstArray()[0].getIConst());
type.transferArraySizes(arraySizes);
type.getQualifier().builtIn = patchType;
if (! acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
return true;
}
// stream_out_template_type
// : output_primitive_geometry_type LEFT_ANGLE type RIGHT_ANGLE
//
bool HlslGrammar::acceptStreamOutTemplateType(TType& type, TLayoutGeometry& geometry)
{
geometry = ElgNone;
if (! acceptOutputPrimitiveGeometry(geometry))
return false;
if (! acceptTokenClass(EHTokLeftAngle))
return false;
if (! acceptType(type)) {
expected("stream output type");
return false;
}
type.getQualifier().storage = EvqOut;
type.getQualifier().builtIn = EbvGsOutputStream;
if (! acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
return true;
}
// annotations
// : LEFT_ANGLE declaration SEMI_COLON ... declaration SEMICOLON RIGHT_ANGLE
//
bool HlslGrammar::acceptAnnotations(TQualifier&)
{
if (! acceptTokenClass(EHTokLeftAngle))
return false;
// note that we are nesting a name space
parseContext.nestAnnotations();
// declaration SEMI_COLON ... declaration SEMICOLON RIGHT_ANGLE
do {
// eat any extra SEMI_COLON; don't know if the grammar calls for this or not
while (acceptTokenClass(EHTokSemicolon))
;
if (acceptTokenClass(EHTokRightAngle))
break;
// declaration
TIntermNode* node = nullptr;
if (! acceptDeclaration(node)) {
expected("declaration in annotation");
return false;
}
} while (true);
parseContext.unnestAnnotations();
return true;
}
// subpass input type
// : SUBPASSINPUT
// | SUBPASSINPUT VECTOR LEFT_ANGLE template_type RIGHT_ANGLE
// | SUBPASSINPUTMS
// | SUBPASSINPUTMS VECTOR LEFT_ANGLE template_type RIGHT_ANGLE
bool HlslGrammar::acceptSubpassInputType(TType& type)
{
// read subpass type
const EHlslTokenClass subpassInputType = peek();
bool multisample;
switch (subpassInputType) {
case EHTokSubpassInput: multisample = false; break;
case EHTokSubpassInputMS: multisample = true; break;
default:
return false; // not a subpass input declaration
}
advanceToken(); // consume the sampler type keyword
TType subpassType(EbtFloat, EvqUniform, 4); // default type is float4
if (acceptTokenClass(EHTokLeftAngle)) {
if (! acceptType(subpassType)) {
expected("scalar or vector type");
return false;
}
const TBasicType basicRetType = subpassType.getBasicType() ;
switch (basicRetType) {
case EbtFloat:
case EbtUint:
case EbtInt:
case EbtStruct:
break;
default:
unimplemented("basic type in subpass input");
return false;
}
if (! acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
}
const TBasicType subpassBasicType = subpassType.isStruct() ? (*subpassType.getStruct())[0].type->getBasicType()
: subpassType.getBasicType();
TSampler sampler;
sampler.setSubpass(subpassBasicType, multisample);
// Remember the declared return type. Function returns false on error.
if (!parseContext.setTextureReturnType(sampler, subpassType, token.loc))
return false;
type.shallowCopy(TType(sampler, EvqUniform));
return true;
}
// sampler_type
// : SAMPLER
// | SAMPLER1D
// | SAMPLER2D
// | SAMPLER3D
// | SAMPLERCUBE
// | SAMPLERSTATE
// | SAMPLERCOMPARISONSTATE
bool HlslGrammar::acceptSamplerType(TType& type)
{
// read sampler type
const EHlslTokenClass samplerType = peek();
// TODO: for DX9
// TSamplerDim dim = EsdNone;
bool isShadow = false;
switch (samplerType) {
case EHTokSampler: break;
case EHTokSampler1d: /*dim = Esd1D*/; break;
case EHTokSampler2d: /*dim = Esd2D*/; break;
case EHTokSampler3d: /*dim = Esd3D*/; break;
case EHTokSamplerCube: /*dim = EsdCube*/; break;
case EHTokSamplerState: break;
case EHTokSamplerComparisonState: isShadow = true; break;
default:
return false; // not a sampler declaration
}
advanceToken(); // consume the sampler type keyword
TArraySizes* arraySizes = nullptr; // TODO: array
TSampler sampler;
sampler.setPureSampler(isShadow);
type.shallowCopy(TType(sampler, EvqUniform, arraySizes));
return true;
}
// texture_type
// | BUFFER
// | TEXTURE1D
// | TEXTURE1DARRAY
// | TEXTURE2D
// | TEXTURE2DARRAY
// | TEXTURE3D
// | TEXTURECUBE
// | TEXTURECUBEARRAY
// | TEXTURE2DMS
// | TEXTURE2DMSARRAY
// | RWBUFFER
// | RWTEXTURE1D
// | RWTEXTURE1DARRAY
// | RWTEXTURE2D
// | RWTEXTURE2DARRAY
// | RWTEXTURE3D
bool HlslGrammar::acceptTextureType(TType& type)
{
const EHlslTokenClass textureType = peek();
TSamplerDim dim = EsdNone;
bool array = false;
bool ms = false;
bool image = false;
bool combined = true;
switch (textureType) {
case EHTokBuffer: dim = EsdBuffer; combined = false; break;
case EHTokTexture1d: dim = Esd1D; break;
case EHTokTexture1darray: dim = Esd1D; array = true; break;
case EHTokTexture2d: dim = Esd2D; break;
case EHTokTexture2darray: dim = Esd2D; array = true; break;
case EHTokTexture3d: dim = Esd3D; break;
case EHTokTextureCube: dim = EsdCube; break;
case EHTokTextureCubearray: dim = EsdCube; array = true; break;
case EHTokTexture2DMS: dim = Esd2D; ms = true; break;
case EHTokTexture2DMSarray: dim = Esd2D; array = true; ms = true; break;
case EHTokRWBuffer: dim = EsdBuffer; image=true; break;
case EHTokRWTexture1d: dim = Esd1D; array=false; image=true; break;
case EHTokRWTexture1darray: dim = Esd1D; array=true; image=true; break;
case EHTokRWTexture2d: dim = Esd2D; array=false; image=true; break;
case EHTokRWTexture2darray: dim = Esd2D; array=true; image=true; break;
case EHTokRWTexture3d: dim = Esd3D; array=false; image=true; break;
default:
return false; // not a texture declaration
}
advanceToken(); // consume the texture object keyword
TType txType(EbtFloat, EvqUniform, 4); // default type is float4
TIntermTyped* msCount = nullptr;
// texture type: required for multisample types and RWBuffer/RWTextures!
if (acceptTokenClass(EHTokLeftAngle)) {
if (! acceptType(txType)) {
expected("scalar or vector type");
return false;
}
const TBasicType basicRetType = txType.getBasicType() ;
switch (basicRetType) {
case EbtFloat:
case EbtUint:
case EbtInt:
case EbtStruct:
break;
default:
unimplemented("basic type in texture");
return false;
}
// Buffers can handle small mats if they fit in 4 components
if (dim == EsdBuffer && txType.isMatrix()) {
if ((txType.getMatrixCols() * txType.getMatrixRows()) > 4) {
expected("components < 4 in matrix buffer type");
return false;
}
// TODO: except we don't handle it yet...
unimplemented("matrix type in buffer");
return false;
}
if (!txType.isScalar() && !txType.isVector() && !txType.isStruct()) {
expected("scalar, vector, or struct type");
return false;
}
if (ms && acceptTokenClass(EHTokComma)) {
// read sample count for multisample types, if given
if (! peekTokenClass(EHTokIntConstant)) {
expected("multisample count");
return false;
}
if (! acceptLiteral(msCount)) // should never fail, since we just found an integer
return false;
}
if (! acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
} else if (ms) {
expected("texture type for multisample");
return false;
} else if (image) {
expected("type for RWTexture/RWBuffer");
return false;
}
TArraySizes* arraySizes = nullptr;
const bool shadow = false; // declared on the sampler
TSampler sampler;
TLayoutFormat format = ElfNone;
// Buffer, RWBuffer and RWTexture (images) require a TLayoutFormat. We handle only a limit set.
if (image || dim == EsdBuffer)
format = parseContext.getLayoutFromTxType(token.loc, txType);
const TBasicType txBasicType = txType.isStruct() ? (*txType.getStruct())[0].type->getBasicType()
: txType.getBasicType();
// Non-image Buffers are combined
if (dim == EsdBuffer && !image) {
sampler.set(txType.getBasicType(), dim, array);
} else {
// DX10 textures are separated. TODO: DX9.
if (image) {
sampler.setImage(txBasicType, dim, array, shadow, ms);
} else {
sampler.setTexture(txBasicType, dim, array, shadow, ms);
}
}
// Remember the declared return type. Function returns false on error.
if (!parseContext.setTextureReturnType(sampler, txType, token.loc))
return false;
// Force uncombined, if necessary
if (!combined)
sampler.combined = false;
type.shallowCopy(TType(sampler, EvqUniform, arraySizes));
type.getQualifier().layoutFormat = format;
return true;
}
// If token is for a type, update 'type' with the type information,
// and return true and advance.
// Otherwise, return false, and don't advance
bool HlslGrammar::acceptType(TType& type)
{
TIntermNode* nodeList = nullptr;
return acceptType(type, nodeList);
}
bool HlslGrammar::acceptType(TType& type, TIntermNode*& nodeList)
{
// Basic types for min* types, use native halfs if the option allows them.
bool enable16BitTypes = parseContext.hlslEnable16BitTypes();
const TBasicType min16float_bt = enable16BitTypes ? EbtFloat16 : EbtFloat;
const TBasicType min10float_bt = enable16BitTypes ? EbtFloat16 : EbtFloat;
const TBasicType half_bt = enable16BitTypes ? EbtFloat16 : EbtFloat;
const TBasicType min16int_bt = enable16BitTypes ? EbtInt16 : EbtInt;
const TBasicType min12int_bt = enable16BitTypes ? EbtInt16 : EbtInt;
const TBasicType min16uint_bt = enable16BitTypes ? EbtUint16 : EbtUint;
// Some types might have turned into identifiers. Take the hit for checking
// when this has happened.
if (typeIdentifiers) {
const char* identifierString = getTypeString(peek());
if (identifierString != nullptr) {
TString name = identifierString;
// if it's an identifier, it's not a type
if (parseContext.symbolTable.find(name) != nullptr)
return false;
}
}
bool isUnorm = false;
bool isSnorm = false;
// Accept snorm and unorm. Presently, this is ignored, save for an error check below.
switch (peek()) {
case EHTokUnorm:
isUnorm = true;
advanceToken(); // eat the token
break;
case EHTokSNorm:
isSnorm = true;
advanceToken(); // eat the token
break;
default:
break;
}
switch (peek()) {
case EHTokVector:
return acceptVectorTemplateType(type);
break;
case EHTokMatrix:
return acceptMatrixTemplateType(type);
break;
case EHTokPointStream: // fall through
case EHTokLineStream: // ...
case EHTokTriangleStream: // ...
{
TLayoutGeometry geometry;
if (! acceptStreamOutTemplateType(type, geometry))
return false;
if (! parseContext.handleOutputGeometry(token.loc, geometry))
return false;
return true;
}
case EHTokInputPatch: // fall through
case EHTokOutputPatch: // ...
{
if (! acceptTessellationPatchTemplateType(type))
return false;
return true;
}
case EHTokSampler: // fall through
case EHTokSampler1d: // ...
case EHTokSampler2d: // ...
case EHTokSampler3d: // ...
case EHTokSamplerCube: // ...
case EHTokSamplerState: // ...
case EHTokSamplerComparisonState: // ...
return acceptSamplerType(type);
break;
case EHTokSubpassInput: // fall through
case EHTokSubpassInputMS: // ...
return acceptSubpassInputType(type);
break;
case EHTokBuffer: // fall through
case EHTokTexture1d: // ...
case EHTokTexture1darray: // ...
case EHTokTexture2d: // ...
case EHTokTexture2darray: // ...
case EHTokTexture3d: // ...
case EHTokTextureCube: // ...
case EHTokTextureCubearray: // ...
case EHTokTexture2DMS: // ...
case EHTokTexture2DMSarray: // ...
case EHTokRWTexture1d: // ...
case EHTokRWTexture1darray: // ...
case EHTokRWTexture2d: // ...
case EHTokRWTexture2darray: // ...
case EHTokRWTexture3d: // ...
case EHTokRWBuffer: // ...
return acceptTextureType(type);
break;
case EHTokAppendStructuredBuffer:
case EHTokByteAddressBuffer:
case EHTokConsumeStructuredBuffer:
case EHTokRWByteAddressBuffer:
case EHTokRWStructuredBuffer:
case EHTokStructuredBuffer:
return acceptStructBufferType(type);
break;
case EHTokTextureBuffer:
return acceptTextureBufferType(type);
break;
case EHTokConstantBuffer:
return acceptConstantBufferType(type);
case EHTokClass:
case EHTokStruct:
case EHTokCBuffer:
case EHTokTBuffer:
return acceptStruct(type, nodeList);
case EHTokIdentifier:
// An identifier could be for a user-defined type.
// Note we cache the symbol table lookup, to save for a later rule
// when this is not a type.
if (parseContext.lookupUserType(*token.string, type) != nullptr) {
advanceToken();
return true;
} else
return false;
case EHTokVoid:
new(&type) TType(EbtVoid);
break;
case EHTokString:
new(&type) TType(EbtString);
break;
case EHTokFloat:
new(&type) TType(EbtFloat);
break;
case EHTokFloat1:
new(&type) TType(EbtFloat);
type.makeVector();
break;
case EHTokFloat2:
new(&type) TType(EbtFloat, EvqTemporary, 2);
break;
case EHTokFloat3:
new(&type) TType(EbtFloat, EvqTemporary, 3);
break;
case EHTokFloat4:
new(&type) TType(EbtFloat, EvqTemporary, 4);
break;
case EHTokDouble:
new(&type) TType(EbtDouble);
break;
case EHTokDouble1:
new(&type) TType(EbtDouble);
type.makeVector();
break;
case EHTokDouble2:
new(&type) TType(EbtDouble, EvqTemporary, 2);
break;
case EHTokDouble3:
new(&type) TType(EbtDouble, EvqTemporary, 3);
break;
case EHTokDouble4:
new(&type) TType(EbtDouble, EvqTemporary, 4);
break;
case EHTokInt:
case EHTokDword:
new(&type) TType(EbtInt);
break;
case EHTokInt1:
new(&type) TType(EbtInt);
type.makeVector();
break;
case EHTokInt2:
new(&type) TType(EbtInt, EvqTemporary, 2);
break;
case EHTokInt3:
new(&type) TType(EbtInt, EvqTemporary, 3);
break;
case EHTokInt4:
new(&type) TType(EbtInt, EvqTemporary, 4);
break;
case EHTokUint:
new(&type) TType(EbtUint);
break;
case EHTokUint1:
new(&type) TType(EbtUint);
type.makeVector();
break;
case EHTokUint2:
new(&type) TType(EbtUint, EvqTemporary, 2);
break;
case EHTokUint3:
new(&type) TType(EbtUint, EvqTemporary, 3);
break;
case EHTokUint4:
new(&type) TType(EbtUint, EvqTemporary, 4);
break;
case EHTokUint64:
new(&type) TType(EbtUint64);
break;
case EHTokBool:
new(&type) TType(EbtBool);
break;
case EHTokBool1:
new(&type) TType(EbtBool);
type.makeVector();
break;
case EHTokBool2:
new(&type) TType(EbtBool, EvqTemporary, 2);
break;
case EHTokBool3:
new(&type) TType(EbtBool, EvqTemporary, 3);
break;
case EHTokBool4:
new(&type) TType(EbtBool, EvqTemporary, 4);
break;
case EHTokHalf:
new(&type) TType(half_bt, EvqTemporary);
break;
case EHTokHalf1:
new(&type) TType(half_bt, EvqTemporary);
type.makeVector();
break;
case EHTokHalf2:
new(&type) TType(half_bt, EvqTemporary, 2);
break;
case EHTokHalf3:
new(&type) TType(half_bt, EvqTemporary, 3);
break;
case EHTokHalf4:
new(&type) TType(half_bt, EvqTemporary, 4);
break;
case EHTokMin16float:
new(&type) TType(min16float_bt, EvqTemporary, EpqMedium);
break;
case EHTokMin16float1:
new(&type) TType(min16float_bt, EvqTemporary, EpqMedium);
type.makeVector();
break;
case EHTokMin16float2:
new(&type) TType(min16float_bt, EvqTemporary, EpqMedium, 2);
break;
case EHTokMin16float3:
new(&type) TType(min16float_bt, EvqTemporary, EpqMedium, 3);
break;
case EHTokMin16float4:
new(&type) TType(min16float_bt, EvqTemporary, EpqMedium, 4);
break;
case EHTokMin10float:
new(&type) TType(min10float_bt, EvqTemporary, EpqMedium);
break;
case EHTokMin10float1:
new(&type) TType(min10float_bt, EvqTemporary, EpqMedium);
type.makeVector();
break;
case EHTokMin10float2:
new(&type) TType(min10float_bt, EvqTemporary, EpqMedium, 2);
break;
case EHTokMin10float3:
new(&type) TType(min10float_bt, EvqTemporary, EpqMedium, 3);
break;
case EHTokMin10float4:
new(&type) TType(min10float_bt, EvqTemporary, EpqMedium, 4);
break;
case EHTokMin16int:
new(&type) TType(min16int_bt, EvqTemporary, EpqMedium);
break;
case EHTokMin16int1:
new(&type) TType(min16int_bt, EvqTemporary, EpqMedium);
type.makeVector();
break;
case EHTokMin16int2:
new(&type) TType(min16int_bt, EvqTemporary, EpqMedium, 2);
break;
case EHTokMin16int3:
new(&type) TType(min16int_bt, EvqTemporary, EpqMedium, 3);
break;
case EHTokMin16int4:
new(&type) TType(min16int_bt, EvqTemporary, EpqMedium, 4);
break;
case EHTokMin12int:
new(&type) TType(min12int_bt, EvqTemporary, EpqMedium);
break;
case EHTokMin12int1:
new(&type) TType(min12int_bt, EvqTemporary, EpqMedium);
type.makeVector();
break;
case EHTokMin12int2:
new(&type) TType(min12int_bt, EvqTemporary, EpqMedium, 2);
break;
case EHTokMin12int3:
new(&type) TType(min12int_bt, EvqTemporary, EpqMedium, 3);
break;
case EHTokMin12int4:
new(&type) TType(min12int_bt, EvqTemporary, EpqMedium, 4);
break;
case EHTokMin16uint:
new(&type) TType(min16uint_bt, EvqTemporary, EpqMedium);
break;
case EHTokMin16uint1:
new(&type) TType(min16uint_bt, EvqTemporary, EpqMedium);
type.makeVector();
break;
case EHTokMin16uint2:
new(&type) TType(min16uint_bt, EvqTemporary, EpqMedium, 2);
break;
case EHTokMin16uint3:
new(&type) TType(min16uint_bt, EvqTemporary, EpqMedium, 3);
break;
case EHTokMin16uint4:
new(&type) TType(min16uint_bt, EvqTemporary, EpqMedium, 4);
break;
case EHTokInt1x1:
new(&type) TType(EbtInt, EvqTemporary, 0, 1, 1);
break;
case EHTokInt1x2:
new(&type) TType(EbtInt, EvqTemporary, 0, 1, 2);
break;
case EHTokInt1x3:
new(&type) TType(EbtInt, EvqTemporary, 0, 1, 3);
break;
case EHTokInt1x4:
new(&type) TType(EbtInt, EvqTemporary, 0, 1, 4);
break;
case EHTokInt2x1:
new(&type) TType(EbtInt, EvqTemporary, 0, 2, 1);
break;
case EHTokInt2x2:
new(&type) TType(EbtInt, EvqTemporary, 0, 2, 2);
break;
case EHTokInt2x3:
new(&type) TType(EbtInt, EvqTemporary, 0, 2, 3);
break;
case EHTokInt2x4:
new(&type) TType(EbtInt, EvqTemporary, 0, 2, 4);
break;
case EHTokInt3x1:
new(&type) TType(EbtInt, EvqTemporary, 0, 3, 1);
break;
case EHTokInt3x2:
new(&type) TType(EbtInt, EvqTemporary, 0, 3, 2);
break;
case EHTokInt3x3:
new(&type) TType(EbtInt, EvqTemporary, 0, 3, 3);
break;
case EHTokInt3x4:
new(&type) TType(EbtInt, EvqTemporary, 0, 3, 4);
break;
case EHTokInt4x1:
new(&type) TType(EbtInt, EvqTemporary, 0, 4, 1);
break;
case EHTokInt4x2:
new(&type) TType(EbtInt, EvqTemporary, 0, 4, 2);
break;
case EHTokInt4x3:
new(&type) TType(EbtInt, EvqTemporary, 0, 4, 3);
break;
case EHTokInt4x4:
new(&type) TType(EbtInt, EvqTemporary, 0, 4, 4);
break;
case EHTokUint1x1:
new(&type) TType(EbtUint, EvqTemporary, 0, 1, 1);
break;
case EHTokUint1x2:
new(&type) TType(EbtUint, EvqTemporary, 0, 1, 2);
break;
case EHTokUint1x3:
new(&type) TType(EbtUint, EvqTemporary, 0, 1, 3);
break;
case EHTokUint1x4:
new(&type) TType(EbtUint, EvqTemporary, 0, 1, 4);
break;
case EHTokUint2x1:
new(&type) TType(EbtUint, EvqTemporary, 0, 2, 1);
break;
case EHTokUint2x2:
new(&type) TType(EbtUint, EvqTemporary, 0, 2, 2);
break;
case EHTokUint2x3:
new(&type) TType(EbtUint, EvqTemporary, 0, 2, 3);
break;
case EHTokUint2x4:
new(&type) TType(EbtUint, EvqTemporary, 0, 2, 4);
break;
case EHTokUint3x1:
new(&type) TType(EbtUint, EvqTemporary, 0, 3, 1);
break;
case EHTokUint3x2:
new(&type) TType(EbtUint, EvqTemporary, 0, 3, 2);
break;
case EHTokUint3x3:
new(&type) TType(EbtUint, EvqTemporary, 0, 3, 3);
break;
case EHTokUint3x4:
new(&type) TType(EbtUint, EvqTemporary, 0, 3, 4);
break;
case EHTokUint4x1:
new(&type) TType(EbtUint, EvqTemporary, 0, 4, 1);
break;
case EHTokUint4x2:
new(&type) TType(EbtUint, EvqTemporary, 0, 4, 2);
break;
case EHTokUint4x3:
new(&type) TType(EbtUint, EvqTemporary, 0, 4, 3);
break;
case EHTokUint4x4:
new(&type) TType(EbtUint, EvqTemporary, 0, 4, 4);
break;
case EHTokBool1x1:
new(&type) TType(EbtBool, EvqTemporary, 0, 1, 1);
break;
case EHTokBool1x2:
new(&type) TType(EbtBool, EvqTemporary, 0, 1, 2);
break;
case EHTokBool1x3:
new(&type) TType(EbtBool, EvqTemporary, 0, 1, 3);
break;
case EHTokBool1x4:
new(&type) TType(EbtBool, EvqTemporary, 0, 1, 4);
break;
case EHTokBool2x1:
new(&type) TType(EbtBool, EvqTemporary, 0, 2, 1);
break;
case EHTokBool2x2:
new(&type) TType(EbtBool, EvqTemporary, 0, 2, 2);
break;
case EHTokBool2x3:
new(&type) TType(EbtBool, EvqTemporary, 0, 2, 3);
break;
case EHTokBool2x4:
new(&type) TType(EbtBool, EvqTemporary, 0, 2, 4);
break;
case EHTokBool3x1:
new(&type) TType(EbtBool, EvqTemporary, 0, 3, 1);
break;
case EHTokBool3x2:
new(&type) TType(EbtBool, EvqTemporary, 0, 3, 2);
break;
case EHTokBool3x3:
new(&type) TType(EbtBool, EvqTemporary, 0, 3, 3);
break;
case EHTokBool3x4:
new(&type) TType(EbtBool, EvqTemporary, 0, 3, 4);
break;
case EHTokBool4x1:
new(&type) TType(EbtBool, EvqTemporary, 0, 4, 1);
break;
case EHTokBool4x2:
new(&type) TType(EbtBool, EvqTemporary, 0, 4, 2);
break;
case EHTokBool4x3:
new(&type) TType(EbtBool, EvqTemporary, 0, 4, 3);
break;
case EHTokBool4x4:
new(&type) TType(EbtBool, EvqTemporary, 0, 4, 4);
break;
case EHTokFloat1x1:
new(&type) TType(EbtFloat, EvqTemporary, 0, 1, 1);
break;
case EHTokFloat1x2:
new(&type) TType(EbtFloat, EvqTemporary, 0, 1, 2);
break;
case EHTokFloat1x3:
new(&type) TType(EbtFloat, EvqTemporary, 0, 1, 3);
break;
case EHTokFloat1x4:
new(&type) TType(EbtFloat, EvqTemporary, 0, 1, 4);
break;
case EHTokFloat2x1:
new(&type) TType(EbtFloat, EvqTemporary, 0, 2, 1);
break;
case EHTokFloat2x2:
new(&type) TType(EbtFloat, EvqTemporary, 0, 2, 2);
break;
case EHTokFloat2x3:
new(&type) TType(EbtFloat, EvqTemporary, 0, 2, 3);
break;
case EHTokFloat2x4:
new(&type) TType(EbtFloat, EvqTemporary, 0, 2, 4);
break;
case EHTokFloat3x1:
new(&type) TType(EbtFloat, EvqTemporary, 0, 3, 1);
break;
case EHTokFloat3x2:
new(&type) TType(EbtFloat, EvqTemporary, 0, 3, 2);
break;
case EHTokFloat3x3:
new(&type) TType(EbtFloat, EvqTemporary, 0, 3, 3);
break;
case EHTokFloat3x4:
new(&type) TType(EbtFloat, EvqTemporary, 0, 3, 4);
break;
case EHTokFloat4x1:
new(&type) TType(EbtFloat, EvqTemporary, 0, 4, 1);
break;
case EHTokFloat4x2:
new(&type) TType(EbtFloat, EvqTemporary, 0, 4, 2);
break;
case EHTokFloat4x3:
new(&type) TType(EbtFloat, EvqTemporary, 0, 4, 3);
break;
case EHTokFloat4x4:
new(&type) TType(EbtFloat, EvqTemporary, 0, 4, 4);
break;
case EHTokHalf1x1:
new(&type) TType(half_bt, EvqTemporary, 0, 1, 1);
break;
case EHTokHalf1x2:
new(&type) TType(half_bt, EvqTemporary, 0, 1, 2);
break;
case EHTokHalf1x3:
new(&type) TType(half_bt, EvqTemporary, 0, 1, 3);
break;
case EHTokHalf1x4:
new(&type) TType(half_bt, EvqTemporary, 0, 1, 4);
break;
case EHTokHalf2x1:
new(&type) TType(half_bt, EvqTemporary, 0, 2, 1);
break;
case EHTokHalf2x2:
new(&type) TType(half_bt, EvqTemporary, 0, 2, 2);
break;
case EHTokHalf2x3:
new(&type) TType(half_bt, EvqTemporary, 0, 2, 3);
break;
case EHTokHalf2x4:
new(&type) TType(half_bt, EvqTemporary, 0, 2, 4);
break;
case EHTokHalf3x1:
new(&type) TType(half_bt, EvqTemporary, 0, 3, 1);
break;
case EHTokHalf3x2:
new(&type) TType(half_bt, EvqTemporary, 0, 3, 2);
break;
case EHTokHalf3x3:
new(&type) TType(half_bt, EvqTemporary, 0, 3, 3);
break;
case EHTokHalf3x4:
new(&type) TType(half_bt, EvqTemporary, 0, 3, 4);
break;
case EHTokHalf4x1:
new(&type) TType(half_bt, EvqTemporary, 0, 4, 1);
break;
case EHTokHalf4x2:
new(&type) TType(half_bt, EvqTemporary, 0, 4, 2);
break;
case EHTokHalf4x3:
new(&type) TType(half_bt, EvqTemporary, 0, 4, 3);
break;
case EHTokHalf4x4:
new(&type) TType(half_bt, EvqTemporary, 0, 4, 4);
break;
case EHTokDouble1x1:
new(&type) TType(EbtDouble, EvqTemporary, 0, 1, 1);
break;
case EHTokDouble1x2:
new(&type) TType(EbtDouble, EvqTemporary, 0, 1, 2);
break;
case EHTokDouble1x3:
new(&type) TType(EbtDouble, EvqTemporary, 0, 1, 3);
break;
case EHTokDouble1x4:
new(&type) TType(EbtDouble, EvqTemporary, 0, 1, 4);
break;
case EHTokDouble2x1:
new(&type) TType(EbtDouble, EvqTemporary, 0, 2, 1);
break;
case EHTokDouble2x2:
new(&type) TType(EbtDouble, EvqTemporary, 0, 2, 2);
break;
case EHTokDouble2x3:
new(&type) TType(EbtDouble, EvqTemporary, 0, 2, 3);
break;
case EHTokDouble2x4:
new(&type) TType(EbtDouble, EvqTemporary, 0, 2, 4);
break;
case EHTokDouble3x1:
new(&type) TType(EbtDouble, EvqTemporary, 0, 3, 1);
break;
case EHTokDouble3x2:
new(&type) TType(EbtDouble, EvqTemporary, 0, 3, 2);
break;
case EHTokDouble3x3:
new(&type) TType(EbtDouble, EvqTemporary, 0, 3, 3);
break;
case EHTokDouble3x4:
new(&type) TType(EbtDouble, EvqTemporary, 0, 3, 4);
break;
case EHTokDouble4x1:
new(&type) TType(EbtDouble, EvqTemporary, 0, 4, 1);
break;
case EHTokDouble4x2:
new(&type) TType(EbtDouble, EvqTemporary, 0, 4, 2);
break;
case EHTokDouble4x3:
new(&type) TType(EbtDouble, EvqTemporary, 0, 4, 3);
break;
case EHTokDouble4x4:
new(&type) TType(EbtDouble, EvqTemporary, 0, 4, 4);
break;
default:
return false;
}
advanceToken();
if ((isUnorm || isSnorm) && !type.isFloatingDomain()) {
parseContext.error(token.loc, "unorm and snorm only valid in floating point domain", "", "");
return false;
}
return true;
}
// struct
// : struct_type IDENTIFIER post_decls LEFT_BRACE struct_declaration_list RIGHT_BRACE
// | struct_type post_decls LEFT_BRACE struct_declaration_list RIGHT_BRACE
// | struct_type IDENTIFIER // use of previously declared struct type
//
// struct_type
// : STRUCT
// | CLASS
// | CBUFFER
// | TBUFFER
//
bool HlslGrammar::acceptStruct(TType& type, TIntermNode*& nodeList)
{
// This storage qualifier will tell us whether it's an AST
// block type or just a generic structure type.
TStorageQualifier storageQualifier = EvqTemporary;
bool readonly = false;
if (acceptTokenClass(EHTokCBuffer)) {
// CBUFFER
storageQualifier = EvqUniform;
} else if (acceptTokenClass(EHTokTBuffer)) {
// TBUFFER
storageQualifier = EvqBuffer;
readonly = true;
} else if (! acceptTokenClass(EHTokClass) && ! acceptTokenClass(EHTokStruct)) {
// Neither CLASS nor STRUCT
return false;
}
// Now known to be one of CBUFFER, TBUFFER, CLASS, or STRUCT
// IDENTIFIER. It might also be a keyword which can double as an identifier.
// For example: 'cbuffer ConstantBuffer' or 'struct ConstantBuffer' is legal.
// 'cbuffer int' is also legal, and 'struct int' appears rejected only because
// it attempts to redefine the 'int' type.
const char* idString = getTypeString(peek());
TString structName = "";
if (peekTokenClass(EHTokIdentifier) || idString != nullptr) {
if (idString != nullptr)
structName = *idString;
else
structName = *token.string;
advanceToken();
}
// post_decls
TQualifier postDeclQualifier;
postDeclQualifier.clear();
bool postDeclsFound = acceptPostDecls(postDeclQualifier);
// LEFT_BRACE, or
// struct_type IDENTIFIER
if (! acceptTokenClass(EHTokLeftBrace)) {
if (structName.size() > 0 && !postDeclsFound && parseContext.lookupUserType(structName, type) != nullptr) {
// struct_type IDENTIFIER
return true;
} else {
expected("{");
return false;
}
}
// struct_declaration_list
TTypeList* typeList;
// Save each member function so they can be processed after we have a fully formed 'this'.
TVector<TFunctionDeclarator> functionDeclarators;
parseContext.pushNamespace(structName);
bool acceptedList = acceptStructDeclarationList(typeList, nodeList, functionDeclarators);
parseContext.popNamespace();
if (! acceptedList) {
expected("struct member declarations");
return false;
}
// RIGHT_BRACE
if (! acceptTokenClass(EHTokRightBrace)) {
expected("}");
return false;
}
// create the user-defined type
if (storageQualifier == EvqTemporary)
new(&type) TType(typeList, structName);
else {
postDeclQualifier.storage = storageQualifier;
postDeclQualifier.readonly = readonly;
new(&type) TType(typeList, structName, postDeclQualifier); // sets EbtBlock
}
parseContext.declareStruct(token.loc, structName, type);
// For member functions: now that we know the type of 'this', go back and
// - add their implicit argument with 'this' (not to the mangling, just the argument list)
// - parse the functions, their tokens were saved for deferred parsing (now)
for (int b = 0; b < (int)functionDeclarators.size(); ++b) {
// update signature
if (functionDeclarators[b].function->hasImplicitThis())
functionDeclarators[b].function->addThisParameter(type, intermediate.implicitThisName);
}
// All member functions get parsed inside the class/struct namespace and with the
// class/struct members in a symbol-table level.
parseContext.pushNamespace(structName);
parseContext.pushThisScope(type, functionDeclarators);
bool deferredSuccess = true;
for (int b = 0; b < (int)functionDeclarators.size() && deferredSuccess; ++b) {
// parse body
pushTokenStream(functionDeclarators[b].body);
if (! acceptFunctionBody(functionDeclarators[b], nodeList))
deferredSuccess = false;
popTokenStream();
}
parseContext.popThisScope();
parseContext.popNamespace();
return deferredSuccess;
}
// constantbuffer
// : CONSTANTBUFFER LEFT_ANGLE type RIGHT_ANGLE
bool HlslGrammar::acceptConstantBufferType(TType& type)
{
if (! acceptTokenClass(EHTokConstantBuffer))
return false;
if (! acceptTokenClass(EHTokLeftAngle)) {
expected("left angle bracket");
return false;
}
TType templateType;
if (! acceptType(templateType)) {
expected("type");
return false;
}
if (! acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
TQualifier postDeclQualifier;
postDeclQualifier.clear();
postDeclQualifier.storage = EvqUniform;
if (templateType.isStruct()) {
// Make a block from the type parsed as the template argument
TTypeList* typeList = templateType.getWritableStruct();
new(&type) TType(typeList, "", postDeclQualifier); // sets EbtBlock
type.getQualifier().storage = EvqUniform;
return true;
} else {
parseContext.error(token.loc, "non-structure type in ConstantBuffer", "", "");
return false;
}
}
// texture_buffer
// : TEXTUREBUFFER LEFT_ANGLE type RIGHT_ANGLE
bool HlslGrammar::acceptTextureBufferType(TType& type)
{
if (! acceptTokenClass(EHTokTextureBuffer))
return false;
if (! acceptTokenClass(EHTokLeftAngle)) {
expected("left angle bracket");
return false;
}
TType templateType;
if (! acceptType(templateType)) {
expected("type");
return false;
}
if (! acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
templateType.getQualifier().storage = EvqBuffer;
templateType.getQualifier().readonly = true;
TType blockType(templateType.getWritableStruct(), "", templateType.getQualifier());
blockType.getQualifier().storage = EvqBuffer;
blockType.getQualifier().readonly = true;
type.shallowCopy(blockType);
return true;
}
// struct_buffer
// : APPENDSTRUCTUREDBUFFER
// | BYTEADDRESSBUFFER
// | CONSUMESTRUCTUREDBUFFER
// | RWBYTEADDRESSBUFFER
// | RWSTRUCTUREDBUFFER
// | STRUCTUREDBUFFER
bool HlslGrammar::acceptStructBufferType(TType& type)
{
const EHlslTokenClass structBuffType = peek();
// TODO: globallycoherent
bool hasTemplateType = true;
bool readonly = false;
TStorageQualifier storage = EvqBuffer;
TBuiltInVariable builtinType = EbvNone;
switch (structBuffType) {
case EHTokAppendStructuredBuffer:
builtinType = EbvAppendConsume;
break;
case EHTokByteAddressBuffer:
hasTemplateType = false;
readonly = true;
builtinType = EbvByteAddressBuffer;
break;
case EHTokConsumeStructuredBuffer:
builtinType = EbvAppendConsume;
break;
case EHTokRWByteAddressBuffer:
hasTemplateType = false;
builtinType = EbvRWByteAddressBuffer;
break;
case EHTokRWStructuredBuffer:
builtinType = EbvRWStructuredBuffer;
break;
case EHTokStructuredBuffer:
builtinType = EbvStructuredBuffer;
readonly = true;
break;
default:
return false; // not a structure buffer type
}
advanceToken(); // consume the structure keyword
// type on which this StructedBuffer is templatized. E.g, StructedBuffer<MyStruct> ==> MyStruct
TType* templateType = new TType;
if (hasTemplateType) {
if (! acceptTokenClass(EHTokLeftAngle)) {
expected("left angle bracket");
return false;
}
if (! acceptType(*templateType)) {
expected("type");
return false;
}
if (! acceptTokenClass(EHTokRightAngle)) {
expected("right angle bracket");
return false;
}
} else {
// byte address buffers have no explicit type.
TType uintType(EbtUint, storage);
templateType->shallowCopy(uintType);
}
// Create an unsized array out of that type.
// TODO: does this work if it's already an array type?
TArraySizes* unsizedArray = new TArraySizes;
unsizedArray->addInnerSize(UnsizedArraySize);
templateType->transferArraySizes(unsizedArray);
templateType->getQualifier().storage = storage;
// field name is canonical for all structbuffers
templateType->setFieldName("@data");
TTypeList* blockStruct = new TTypeList;
TTypeLoc member = { templateType, token.loc };
blockStruct->push_back(member);
// This is the type of the buffer block (SSBO)
TType blockType(blockStruct, "", templateType->getQualifier());
blockType.getQualifier().storage = storage;
blockType.getQualifier().readonly = readonly;
blockType.getQualifier().builtIn = builtinType;
// We may have created an equivalent type before, in which case we should use its
// deep structure.
parseContext.shareStructBufferType(blockType);
type.shallowCopy(blockType);
return true;
}
// struct_declaration_list
// : struct_declaration SEMI_COLON struct_declaration SEMI_COLON ...
//
// struct_declaration
// : attributes fully_specified_type struct_declarator COMMA struct_declarator ...
// | attributes fully_specified_type IDENTIFIER function_parameters post_decls compound_statement // member-function definition
//
// struct_declarator
// : IDENTIFIER post_decls
// | IDENTIFIER array_specifier post_decls
// | IDENTIFIER function_parameters post_decls // member-function prototype
//
bool HlslGrammar::acceptStructDeclarationList(TTypeList*& typeList, TIntermNode*& nodeList,
TVector<TFunctionDeclarator>& declarators)
{
typeList = new TTypeList();
HlslToken idToken;
do {
// success on seeing the RIGHT_BRACE coming up
if (peekTokenClass(EHTokRightBrace))
break;
// struct_declaration
// attributes
TAttributes attributes;
acceptAttributes(attributes);
bool declarator_list = false;
// fully_specified_type
TType memberType;
if (! acceptFullySpecifiedType(memberType, nodeList, attributes)) {
expected("member type");
return false;
}
// merge in the attributes
parseContext.transferTypeAttributes(token.loc, attributes, memberType);
// struct_declarator COMMA struct_declarator ...
bool functionDefinitionAccepted = false;
do {
if (! acceptIdentifier(idToken)) {
expected("member name");
return false;
}
if (peekTokenClass(EHTokLeftParen)) {
// function_parameters
if (!declarator_list) {
declarators.resize(declarators.size() + 1);
// request a token stream for deferred processing
functionDefinitionAccepted = acceptMemberFunctionDefinition(nodeList, memberType, *idToken.string,
declarators.back());
if (functionDefinitionAccepted)
break;
}
expected("member-function definition");
return false;
} else {
// add it to the list of members
TTypeLoc member = { new TType(EbtVoid), token.loc };
member.type->shallowCopy(memberType);
member.type->setFieldName(*idToken.string);
typeList->push_back(member);
// array_specifier
TArraySizes* arraySizes = nullptr;
acceptArraySpecifier(arraySizes);
if (arraySizes)
typeList->back().type->transferArraySizes(arraySizes);
acceptPostDecls(member.type->getQualifier());
// EQUAL assignment_expression
if (acceptTokenClass(EHTokAssign)) {
parseContext.warn(idToken.loc, "struct-member initializers ignored", "typedef", "");
TIntermTyped* expressionNode = nullptr;
if (! acceptAssignmentExpression(expressionNode)) {
expected("initializer");
return false;
}
}
}
// success on seeing the SEMICOLON coming up
if (peekTokenClass(EHTokSemicolon))
break;
// COMMA
if (acceptTokenClass(EHTokComma))
declarator_list = true;
else {
expected(",");
return false;
}
} while (true);
// SEMI_COLON
if (! functionDefinitionAccepted && ! acceptTokenClass(EHTokSemicolon)) {
expected(";");
return false;
}
} while (true);
return true;
}
// member_function_definition
// | function_parameters post_decls compound_statement
//
// Expects type to have EvqGlobal for a static member and
// EvqTemporary for non-static member.
bool HlslGrammar::acceptMemberFunctionDefinition(TIntermNode*& nodeList, const TType& type, TString& memberName,
TFunctionDeclarator& declarator)
{
bool accepted = false;
TString* functionName = &memberName;
parseContext.getFullNamespaceName(functionName);
declarator.function = new TFunction(functionName, type);
if (type.getQualifier().storage == EvqTemporary)
declarator.function->setImplicitThis();
else
declarator.function->setIllegalImplicitThis();
// function_parameters
if (acceptFunctionParameters(*declarator.function)) {
// post_decls
acceptPostDecls(declarator.function->getWritableType().getQualifier());
// compound_statement (function body definition)
if (peekTokenClass(EHTokLeftBrace)) {
declarator.loc = token.loc;
declarator.body = new TVector<HlslToken>;
accepted = acceptFunctionDefinition(declarator, nodeList, declarator.body);
}
} else
expected("function parameter list");
return accepted;
}
// function_parameters
// : LEFT_PAREN parameter_declaration COMMA parameter_declaration ... RIGHT_PAREN
// | LEFT_PAREN VOID RIGHT_PAREN
//
bool HlslGrammar::acceptFunctionParameters(TFunction& function)
{
// LEFT_PAREN
if (! acceptTokenClass(EHTokLeftParen))
return false;
// VOID RIGHT_PAREN
if (! acceptTokenClass(EHTokVoid)) {
do {
// parameter_declaration
if (! acceptParameterDeclaration(function))
break;
// COMMA
if (! acceptTokenClass(EHTokComma))
break;
} while (true);
}
// RIGHT_PAREN
if (! acceptTokenClass(EHTokRightParen)) {
expected(")");
return false;
}
return true;
}
// default_parameter_declaration
// : EQUAL conditional_expression
// : EQUAL initializer
bool HlslGrammar::acceptDefaultParameterDeclaration(const TType& type, TIntermTyped*& node)
{
node = nullptr;
// Valid not to have a default_parameter_declaration
if (!acceptTokenClass(EHTokAssign))
return true;
if (!acceptConditionalExpression(node)) {
if (!acceptInitializer(node))
return false;
// For initializer lists, we have to const-fold into a constructor for the type, so build
// that.
TFunction* constructor = parseContext.makeConstructorCall(token.loc, type);
if (constructor == nullptr) // cannot construct
return false;
TIntermTyped* arguments = nullptr;
for (int i = 0; i < int(node->getAsAggregate()->getSequence().size()); i++)
parseContext.handleFunctionArgument(constructor, arguments, node->getAsAggregate()->getSequence()[i]->getAsTyped());
node = parseContext.handleFunctionCall(token.loc, constructor, node);
}
if (node == nullptr)
return false;
// If this is simply a constant, we can use it directly.
if (node->getAsConstantUnion())
return true;
// Otherwise, it has to be const-foldable.
TIntermTyped* origNode = node;
node = intermediate.fold(node->getAsAggregate());
if (node != nullptr && origNode != node)
return true;
parseContext.error(token.loc, "invalid default parameter value", "", "");
return false;
}
// parameter_declaration
// : attributes attributed_declaration
//
// attributed_declaration
// : fully_specified_type post_decls [ = default_parameter_declaration ]
// | fully_specified_type identifier array_specifier post_decls [ = default_parameter_declaration ]
//
bool HlslGrammar::acceptParameterDeclaration(TFunction& function)
{
// attributes
TAttributes attributes;
acceptAttributes(attributes);
// fully_specified_type
TType* type = new TType;
if (! acceptFullySpecifiedType(*type, attributes))
return false;
// merge in the attributes
parseContext.transferTypeAttributes(token.loc, attributes, *type);
// identifier
HlslToken idToken;
acceptIdentifier(idToken);
// array_specifier
TArraySizes* arraySizes = nullptr;
acceptArraySpecifier(arraySizes);
if (arraySizes) {
if (arraySizes->hasUnsized()) {
parseContext.error(token.loc, "function parameter requires array size", "[]", "");
return false;
}
type->transferArraySizes(arraySizes);
}
// post_decls
acceptPostDecls(type->getQualifier());
TIntermTyped* defaultValue;
if (!acceptDefaultParameterDeclaration(*type, defaultValue))
return false;
parseContext.paramFix(*type);
// If any prior parameters have default values, all the parameters after that must as well.
if (defaultValue == nullptr && function.getDefaultParamCount() > 0) {
parseContext.error(idToken.loc, "invalid parameter after default value parameters", idToken.string->c_str(), "");
return false;
}
TParameter param = { idToken.string, type, defaultValue };
function.addParameter(param);
return true;
}
// Do the work to create the function definition in addition to
// parsing the body (compound_statement).
//
// If 'deferredTokens' are passed in, just get the token stream,
// don't process.
//
bool HlslGrammar::acceptFunctionDefinition(TFunctionDeclarator& declarator, TIntermNode*& nodeList,
TVector<HlslToken>* deferredTokens)
{
parseContext.handleFunctionDeclarator(declarator.loc, *declarator.function, false /* not prototype */);
if (deferredTokens)
return captureBlockTokens(*deferredTokens);
else
return acceptFunctionBody(declarator, nodeList);
}
bool HlslGrammar::acceptFunctionBody(TFunctionDeclarator& declarator, TIntermNode*& nodeList)
{
// we might get back an entry-point
TIntermNode* entryPointNode = nullptr;
// This does a pushScope()
TIntermNode* functionNode = parseContext.handleFunctionDefinition(declarator.loc, *declarator.function,
declarator.attributes, entryPointNode);
// compound_statement
TIntermNode* functionBody = nullptr;
if (! acceptCompoundStatement(functionBody))
return false;
// this does a popScope()
parseContext.handleFunctionBody(declarator.loc, *declarator.function, functionBody, functionNode);
// Hook up the 1 or 2 function definitions.
nodeList = intermediate.growAggregate(nodeList, functionNode);
nodeList = intermediate.growAggregate(nodeList, entryPointNode);
return true;
}
// Accept an expression with parenthesis around it, where
// the parenthesis ARE NOT expression parenthesis, but the
// syntactically required ones like in "if ( expression )".
//
// Also accepts a declaration expression; "if (int a = expression)".
//
// Note this one is not set up to be speculative; as it gives
// errors if not found.
//
bool HlslGrammar::acceptParenExpression(TIntermTyped*& expression)
{
expression = nullptr;
// LEFT_PAREN
if (! acceptTokenClass(EHTokLeftParen))
expected("(");
bool decl = false;
TIntermNode* declNode = nullptr;
decl = acceptControlDeclaration(declNode);
if (decl) {
if (declNode == nullptr || declNode->getAsTyped() == nullptr) {
expected("initialized declaration");
return false;
} else
expression = declNode->getAsTyped();
} else {
// no declaration
if (! acceptExpression(expression)) {
expected("expression");
return false;
}
}
// RIGHT_PAREN
if (! acceptTokenClass(EHTokRightParen))
expected(")");
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