chromium/third_party/dawn/src/tint/lang/wgsl/ast/var.h

// Copyright 2022 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef SRC_TINT_LANG_WGSL_AST_VAR_H_
#define SRC_TINT_LANG_WGSL_AST_VAR_H_

#include <utility>
#include <vector>

#include "src/tint/lang/wgsl/ast/variable.h"

namespace tint::ast {

/// A "var" declaration is a name for typed storage.
///
/// Examples:
///
/// ```
///  // Declared outside a function, i.e. at module scope, requires
///  // a address space.
///  var<workgroup> width : i32;     // no initializer
///  var<private> height : i32 = 3;  // with initializer
///
///  // A variable declared inside a function doesn't take a address space,
///  // and maps to SPIR-V Function storage.
///  var computed_depth : i32;
///  var area : i32 = compute_area(width, height);
/// ```
///
/// @see https://www.w3.org/TR/WGSL/#var-decls
class Var final : public Castable<Var, Variable> { … };

/// A list of `var` declarations
VarList;

}  // namespace tint::ast

#endif  // SRC_TINT_LANG_WGSL_AST_VAR_H_