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8648120bbe
And remove a whole load of const_cast hackery. Semantic nodes may contain internally mutable fields (although only ever modified during resolving), so these are always passed by `const` pointer. While all AST nodes are internally immutable, we have decided that pointers to AST nodes should also be marked `const`, for consistency. There's still a collection of const_cast calls in the Resolver. These will be fixed up in a later change. Bug: tint:745 Change-Id: I046309b8e586772605fc0fe6b2d27f28806d40ef Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/66606 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@chromium.org> Reviewed-by: David Neto <dneto@google.com>
105 lines
3.1 KiB
C++
105 lines
3.1 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_SEM_CALL_TARGET_H_
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#define SRC_SEM_CALL_TARGET_H_
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#include <vector>
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#include "src/sem/node.h"
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#include "src/sem/sampler_type.h"
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#include "src/sem/variable.h"
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#include "src/utils/hash.h"
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namespace tint {
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namespace sem {
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// Forward declarations
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class Type;
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/// CallTargetSignature holds the return type and parameters for a call target
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struct CallTargetSignature {
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/// Constructor
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/// @param ret_ty the call target return type
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/// @param params the call target parameters
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CallTargetSignature(const sem::Type* ret_ty, const ParameterList& params);
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/// Copy constructor
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CallTargetSignature(const CallTargetSignature&);
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/// Destructor
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~CallTargetSignature();
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/// The type of the call target return value
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const sem::Type* const return_type = nullptr;
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/// The parameters of the call target
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const ParameterList parameters;
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/// Equality operator
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/// @param other the signature to compare this to
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/// @returns true if this signature is equal to other
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bool operator==(const CallTargetSignature& other) const;
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/// @param usage the parameter usage to find
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/// @returns the index of the parameter with the given usage, or -1 if no
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/// parameter with the given usage exists.
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int IndexOf(ParameterUsage usage) const;
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};
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/// CallTarget is the base for callable functions
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class CallTarget : public Castable<CallTarget, Node> {
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public:
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/// Constructor
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/// @param return_type the return type of the call target
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/// @param parameters the parameters for the call target
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CallTarget(const sem::Type* return_type, const ParameterList& parameters);
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/// Copy constructor
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CallTarget(const CallTarget&);
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/// Destructor
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~CallTarget() override;
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/// @return the return type of the call target
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const sem::Type* ReturnType() const { return signature_.return_type; }
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/// @return the parameters of the call target
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const ParameterList& Parameters() const { return signature_.parameters; }
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/// @return the signature of the call target
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const CallTargetSignature& Signature() const { return signature_; }
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private:
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CallTargetSignature signature_;
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};
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} // namespace sem
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} // namespace tint
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namespace std {
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/// Custom std::hash specialization for tint::sem::CallTargetSignature so
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/// CallTargetSignature can be used as keys for std::unordered_map and
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/// std::unordered_set.
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template <>
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class hash<tint::sem::CallTargetSignature> {
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public:
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/// @param sig the CallTargetSignature to hash
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/// @return the hash value
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std::size_t operator()(const tint::sem::CallTargetSignature& sig) const;
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};
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} // namespace std
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#endif // SRC_SEM_CALL_TARGET_H_
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