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a7cd3aeff0
This is now a well-defined term in the WGSL spec, so we should use it. Change-Id: Icc46a77f0a465afbfd39cdaec84e506b143c8c0c Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/109220 Commit-Queue: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Auto-Submit: James Price <jrprice@google.com>
133 lines
5.1 KiB
C++
133 lines
5.1 KiB
C++
// Copyright 2021 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_TINT_SEM_MEMBER_ACCESSOR_EXPRESSION_H_
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#define SRC_TINT_SEM_MEMBER_ACCESSOR_EXPRESSION_H_
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#include "src/tint/sem/expression.h"
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#include "src/tint/utils/vector.h"
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// Forward declarations
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namespace tint::ast {
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class MemberAccessorExpression;
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} // namespace tint::ast
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namespace tint::sem {
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class Struct;
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class StructMember;
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} // namespace tint::sem
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namespace tint::sem {
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/// MemberAccessorExpression holds the semantic information for a
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/// ast::MemberAccessorExpression node.
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class MemberAccessorExpression : public Castable<MemberAccessorExpression, Expression> {
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public:
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/// Destructor
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~MemberAccessorExpression() override;
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/// @returns the object that holds the member being accessed
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const Expression* Object() const { return object_; }
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protected:
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/// Constructor
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/// @param declaration the AST node
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/// @param type the resolved type of the expression
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/// @param stage the earliest evaluation stage for the expression
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/// @param statement the statement that owns this expression
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/// @param constant the constant value of the expression. May be null.
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/// @param object the object that holds the member being accessed
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/// @param has_side_effects whether this expression may have side effects
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/// @param root_ident the (optional) root identifier for this expression
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MemberAccessorExpression(const ast::MemberAccessorExpression* declaration,
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const sem::Type* type,
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EvaluationStage stage,
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const Statement* statement,
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const Constant* constant,
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const Expression* object,
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bool has_side_effects,
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const Variable* root_ident = nullptr);
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private:
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Expression const* const object_;
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};
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/// StructMemberAccess holds the semantic information for a
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/// ast::MemberAccessorExpression node that represents an access to a structure
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/// member.
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class StructMemberAccess final : public Castable<StructMemberAccess, MemberAccessorExpression> {
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public:
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/// Constructor
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/// @param declaration the AST node
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/// @param type the resolved type of the expression
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/// @param statement the statement that owns this expression
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/// @param constant the constant value of the expression. May be null
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/// @param object the object that holds the member being accessed
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/// @param member the structure member
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/// @param has_side_effects whether this expression may have side effects
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/// @param root_ident the (optional) root identifier for this expression
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StructMemberAccess(const ast::MemberAccessorExpression* declaration,
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const sem::Type* type,
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const Statement* statement,
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const Constant* constant,
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const Expression* object,
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const StructMember* member,
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bool has_side_effects,
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const Variable* root_ident = nullptr);
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/// Destructor
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~StructMemberAccess() override;
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/// @returns the structure member
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StructMember const* Member() const { return member_; }
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private:
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StructMember const* const member_;
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};
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/// Swizzle holds the semantic information for a ast::MemberAccessorExpression
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/// node that represents a vector swizzle.
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class Swizzle final : public Castable<Swizzle, MemberAccessorExpression> {
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public:
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/// Constructor
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/// @param declaration the AST node
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/// @param type the resolved type of the expression
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/// @param statement the statement that owns this expression
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/// @param constant the constant value of the expression. May be null
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/// @param object the object that holds the member being accessed
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/// @param indices the swizzle indices
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/// @param has_side_effects whether this expression may have side effects
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/// @param root_ident the (optional) root identifier for this expression
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Swizzle(const ast::MemberAccessorExpression* declaration,
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const sem::Type* type,
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const Statement* statement,
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const Constant* constant,
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const Expression* object,
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utils::VectorRef<uint32_t> indices,
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bool has_side_effects,
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const Variable* root_ident = nullptr);
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/// Destructor
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~Swizzle() override;
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/// @return the swizzle indices, if this is a vector swizzle
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const auto& Indices() const { return indices_; }
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private:
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utils::Vector<uint32_t, 4> const indices_;
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};
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} // namespace tint::sem
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#endif // SRC_TINT_SEM_MEMBER_ACCESSOR_EXPRESSION_H_
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