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This enables the WGSL parsing of 'const' for only tint_unittests, allowing code to be split up into smaller chunks for review. Once all the logic is submitted to handle 'const', the test-only flag will be removed, and 'const' will be enabled for production. Bug: tint:1580 Change-Id: I3189b6bd15445ecc3fa1cd6f568885e7ba3c91c0 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/94680 Reviewed-by: David Neto <dneto@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com>
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
// Copyright 2022 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_AST_VAR_H_
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#define SRC_TINT_AST_VAR_H_
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#include <utility>
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#include <vector>
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#include "src/tint/ast/variable.h"
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namespace tint::ast {
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/// A "var" declaration is a name for typed storage.
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///
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/// Examples:
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///
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/// ```
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/// // Declared outside a function, i.e. at module scope, requires
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/// // a storage class.
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/// var<workgroup> width : i32; // no initializer
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/// var<private> height : i32 = 3; // with initializer
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///
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/// // A variable declared inside a function doesn't take a storage class,
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/// // and maps to SPIR-V Function storage.
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/// var computed_depth : i32;
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/// var area : i32 = compute_area(width, height);
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/// ```
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///
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/// @see https://www.w3.org/TR/WGSL/#var-decls
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class Var final : public Castable<Var, Variable> {
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public:
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/// Create a 'var' variable
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/// @param program_id the identifier of the program that owns this node
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/// @param source the variable source
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/// @param sym the variable symbol
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/// @param type the declared variable type
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/// @param declared_storage_class the declared storage class
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/// @param declared_access the declared access control
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/// @param constructor the constructor expression
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/// @param attributes the variable attributes
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Var(ProgramID program_id,
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const Source& source,
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const Symbol& sym,
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const ast::Type* type,
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StorageClass declared_storage_class,
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Access declared_access,
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const Expression* constructor,
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AttributeList attributes);
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/// Move constructor
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Var(Var&&);
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/// Destructor
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~Var() override;
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/// @returns "var"
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const char* Kind() const override;
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/// Clones this node and all transitive child nodes using the `CloneContext`
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/// `ctx`.
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/// @param ctx the clone context
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/// @return the newly cloned node
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const Var* Clone(CloneContext* ctx) const override;
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/// The declared storage class
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const StorageClass declared_storage_class;
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/// The declared access control
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const Access declared_access;
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};
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/// A list of `var` declarations
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using VarList = std::vector<const Var*>;
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} // namespace tint::ast
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#endif // SRC_TINT_AST_VAR_H_
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