glslast.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#include "glslast_p.h"
#include "glslastvisitor_p.h"
#include "glslparsertable_p.h"
 
QT_BEGIN_NAMESPACE
 
using namespace GLSL;
 
void AST::accept(Visitor *visitor)
{
    if (visitor->preVisit(this))
        accept0(visitor);
    visitor->postVisit(this);
}
 
void AST::accept(AST *ast, Visitor *visitor)
{
    if (ast)
        ast->accept(visitor);
}
 
void TranslationUnitAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(declarations, visitor);
    visitor->endVisit(this);
}
 
void IdentifierExpressionAST::accept0(Visitor *visitor)
{
    visitor->visit(this);
    visitor->endVisit(this);
}
 
void LiteralExpressionAST::accept0(Visitor *visitor)
{
    visitor->visit(this);
    visitor->endVisit(this);
}
 
void BinaryExpressionAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(left, visitor);
        accept(right, visitor);
    }
    visitor->endVisit(this);
}
 
void UnaryExpressionAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(expr, visitor);
    visitor->endVisit(this);
}
 
void TernaryExpressionAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(first, visitor);
        accept(second, visitor);
        accept(third, visitor);
    }
    visitor->endVisit(this);
}
 
void AssignmentExpressionAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(variable, visitor);
        accept(value, visitor);
    }
    visitor->endVisit(this);
}
 
void MemberAccessExpressionAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(expr, visitor);
    visitor->endVisit(this);
}
 
void FunctionCallExpressionAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(expr, visitor);
        accept(id, visitor);
        accept(arguments, visitor);
    }
    visitor->endVisit(this);
}
 
void FunctionIdentifierAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(type, visitor);
    visitor->endVisit(this);
}
 
void DeclarationExpressionAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(type, visitor);
        accept(initializer, visitor);
    }
    visitor->endVisit(this);
}
 
void ExpressionStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(expr, visitor);
    visitor->endVisit(this);
}
 
void CompoundStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(statements, visitor);
    visitor->endVisit(this);
}
 
void IfStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(condition, visitor);
        accept(thenClause, visitor);
        accept(elseClause, visitor);
    }
    visitor->endVisit(this);
}
 
void WhileStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(condition, visitor);
        accept(body, visitor);
    }
    visitor->endVisit(this);
}
 
void DoStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(body, visitor);
        accept(condition, visitor);
    }
    visitor->endVisit(this);
}
 
void ForStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(init, visitor);
        accept(condition, visitor);
        accept(increment, visitor);
        accept(body, visitor);
    }
    visitor->endVisit(this);
}
 
void JumpStatementAST::accept0(Visitor *visitor)
{
    visitor->visit(this);
    visitor->endVisit(this);
}
 
void ReturnStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(expr, visitor);
    visitor->endVisit(this);
}
 
void SwitchStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(expr, visitor);
        accept(body, visitor);
    }
    visitor->endVisit(this);
}
 
void CaseLabelStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(expr, visitor);
    visitor->endVisit(this);
}
 
void DeclarationStatementAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(decl, visitor);
    visitor->endVisit(this);
}
 
BasicTypeAST::BasicTypeAST(int _token, const char *_name)
    : TypeAST(Kind_BasicType), token(_token), name(_name)
{
    switch (token) {
    case GLSLParserTable::T_VOID:
    case GLSLParserTable::T_BOOL:
    case GLSLParserTable::T_BVEC2:
    case GLSLParserTable::T_BVEC3:
    case GLSLParserTable::T_BVEC4:
        prec = PrecNotValid;
        break;
    default:
        prec = PrecUnspecified;
        break;
    }
}
 
void BasicTypeAST::accept0(Visitor *visitor)
{
    visitor->visit(this);
    visitor->endVisit(this);
}
 
TypeAST::Precision BasicTypeAST::precision() const
{
    return prec;
}
 
bool BasicTypeAST::setPrecision(Precision precision)
{
    if (prec == PrecNotValid)
        return false;
    prec = precision;
    return true;
}
 
void NamedTypeAST::accept0(Visitor *visitor)
{
    visitor->visit(this);
    visitor->endVisit(this);
}
 
TypeAST::Precision NamedTypeAST::precision() const
{
    // Named types are typically structs, which cannot have their precision set.
    return PrecNotValid;
}
 
bool NamedTypeAST::setPrecision(Precision)
{
    return false;
}
 
void ArrayTypeAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(elementType, visitor);
        accept(size, visitor);
    }
    visitor->endVisit(this);
}
 
TypeAST::Precision ArrayTypeAST::precision() const
{
    return elementType ? elementType->precision() : PrecNotValid;
}
 
bool ArrayTypeAST::setPrecision(Precision precision)
{
    if (elementType)
        return elementType->setPrecision(precision);
 
    return false;
}
 
void StructTypeAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(fields, visitor);
    visitor->endVisit(this);
}
 
TypeAST::Precision StructTypeAST::precision() const
{
    return PrecNotValid;
}
 
bool StructTypeAST::setPrecision(Precision)
{
    // Structs cannot have a precision set.
    return false;
}
 
void StructTypeAST::Field::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(type, visitor);
    visitor->endVisit(this);
}
 
void StructTypeAST::Field::setInnerType(TypeAST *innerType)
{
    if (!innerType)
        return;
    TypeAST **parent = &type;
    TypeAST *inner = type;
    while (inner != nullptr) {
        ArrayTypeAST *array = inner->asArrayType();
        if (!array)
            break;
        parent = &(array->elementType);
        inner = array->elementType;
    }
    *parent = innerType;
}
 
List<StructTypeAST::Field *> *StructTypeAST::fixInnerTypes(TypeAST *innerType, List<Field *> *fields)
{
    if (!fields)
        return fields;
    List<Field *> *head = fields->next;
    List<Field *> *current = head;
    do {
        current->value->setInnerType(innerType);
        current = current->next;
    } while (current && current != head);
    return fields;
}
 
void LayoutQualifierAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
    }
    visitor->endVisit(this);
}
 
void QualifiedTypeAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(type, visitor);
    visitor->endVisit(this);
}
 
void PrecisionDeclarationAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(type, visitor);
    visitor->endVisit(this);
}
 
void ParameterDeclarationAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(type, visitor);
    visitor->endVisit(this);
}
 
void VariableDeclarationAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(type, visitor);
        accept(initializer, visitor);
    }
    visitor->endVisit(this);
}
 
TypeAST *VariableDeclarationAST::declarationType(List<DeclarationAST *> *decls)
{
    VariableDeclarationAST *var = decls->value->asVariableDeclaration();
    return var ? var->type : nullptr;
}
 
void TypeDeclarationAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(type, visitor);
    visitor->endVisit(this);
}
 
void TypeAndVariableDeclarationAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(typeDecl, visitor);
        accept(varDecl, visitor);
    }
    visitor->endVisit(this);
}
 
void InvariantDeclarationAST::accept0(Visitor *visitor)
{
    visitor->visit(this);
    visitor->endVisit(this);
}
 
void InitDeclarationAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this))
        accept(decls, visitor);
    visitor->endVisit(this);
}
 
void FunctionDeclarationAST::accept0(Visitor *visitor)
{
    if (visitor->visit(this)) {
        accept(returnType, visitor);
        accept(params, visitor);
        accept(body, visitor);
    }
    visitor->endVisit(this);
}
 
QT_END_NAMESPACE