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// Copyright 2021 The Dawn & Tint Authors
//
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#ifndef SRC_TINT_LANG_WGSL_SEM_MEMBER_ACCESSOR_EXPRESSION_H_
#define SRC_TINT_LANG_WGSL_SEM_MEMBER_ACCESSOR_EXPRESSION_H_
#include "src/tint/lang/wgsl/sem/accessor_expression.h"
#include "src/tint/utils/containers/vector.h"
// Forward declarations
namespace tint::ast {
class MemberAccessorExpression;
} // namespace tint::ast
namespace tint::core::type {
class StructMember;
} // namespace tint::core::type
namespace tint::sem {
/// MemberAccessorExpression is the base class for all semantic information for a
/// ast::MemberAccessorExpression node.
class MemberAccessorExpression : public Castable<MemberAccessorExpression, AccessorExpression> {
public:
/// Destructor
~MemberAccessorExpression() override;
protected:
/// Constructor
/// @param declaration the AST node
/// @param type the resolved type of the expression
/// @param stage the earliest evaluation stage for the expression
/// @param statement the statement that owns this expression
/// @param constant the constant value of the expression. May be null.
/// @param object the object that holds the member being accessed
/// @param has_side_effects whether this expression may have side effects
/// @param root_ident the (optional) root identifier for this expression
MemberAccessorExpression(const ast::MemberAccessorExpression* declaration,
const core::type::Type* type,
core::EvaluationStage stage,
const Statement* statement,
const core::constant::Value* constant,
const ValueExpression* object,
bool has_side_effects,
const Variable* root_ident = nullptr);
};
/// StructMemberAccess holds the semantic information for a
/// ast::MemberAccessorExpression node that represents an access to a structure
/// member.
class StructMemberAccess final : public Castable<StructMemberAccess, MemberAccessorExpression> {
public:
/// Constructor
/// @param declaration the AST node
/// @param type the resolved type of the expression
/// @param statement the statement that owns this expression
/// @param constant the constant value of the expression. May be null
/// @param object the object that holds the member being accessed
/// @param member the structure member
/// @param has_side_effects whether this expression may have side effects
/// @param root_ident the (optional) root identifier for this expression
StructMemberAccess(const ast::MemberAccessorExpression* declaration,
const core::type::Type* type,
const Statement* statement,
const core::constant::Value* constant,
const ValueExpression* object,
const core::type::StructMember* member,
bool has_side_effects,
const Variable* root_ident = nullptr);
/// Destructor
~StructMemberAccess() override;
/// @returns the structure member
core::type::StructMember const* Member() const { return member_; }
private:
core::type::StructMember const* const member_;
};
/// Swizzle holds the semantic information for a ast::MemberAccessorExpression
/// node that represents a vector swizzle.
class Swizzle final : public Castable<Swizzle, MemberAccessorExpression> {
public:
/// Constructor
/// @param declaration the AST node
/// @param type the resolved type of the expression
/// @param statement the statement that owns this expression
/// @param constant the constant value of the expression. May be null
/// @param object the object that holds the member being accessed
/// @param indices the swizzle indices
/// @param has_side_effects whether this expression may have side effects
/// @param root_ident the (optional) root identifier for this expression
Swizzle(const ast::MemberAccessorExpression* declaration,
const core::type::Type* type,
const Statement* statement,
const core::constant::Value* constant,
const ValueExpression* object,
VectorRef<uint32_t> indices,
bool has_side_effects,
const Variable* root_ident = nullptr);
/// Destructor
~Swizzle() override;
/// @return the swizzle indices, if this is a vector swizzle
const auto& Indices() const { return indices_; }
private:
tint::Vector<uint32_t, 4> const indices_;
};
} // namespace tint::sem
#endif // SRC_TINT_LANG_WGSL_SEM_MEMBER_ACCESSOR_EXPRESSION_H_