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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_TINT_LANG_WGSL_AST_BLOCK_STATEMENT_H_
#define SRC_TINT_LANG_WGSL_AST_BLOCK_STATEMENT_H_
#include <utility>
#include "src/tint/lang/wgsl/ast/statement.h"
#include "src/tint/utils/containers/vector.h"
#include "src/tint/utils/diagnostic/source.h"
// Forward declarations
namespace tint::ast {
class Attribute;
} // namespace tint::ast
namespace tint::ast {
/// A block statement
class BlockStatement final : public Castable<BlockStatement, Statement> {
public:
/// Constructor
/// @param pid the identifier of the program that owns this node
/// @param nid the unique node identifier
/// @param source the block statement source
/// @param statements the statements
/// @param attributes the block statement attributes
BlockStatement(GenerationID pid,
NodeID nid,
const Source& source,
VectorRef<const Statement*> statements,
VectorRef<const Attribute*> attributes);
/// Destructor
~BlockStatement() override;
/// @returns true if the block has no statements
bool Empty() const { return statements.IsEmpty(); }
/// @returns the last statement in the block or nullptr if block empty
const Statement* Last() const { return statements.IsEmpty() ? nullptr : statements.Back(); }
/// Clones this node and all transitive child nodes using the `CloneContext`
/// `ctx`.
/// @param ctx the clone context
/// @return the newly cloned node
const BlockStatement* Clone(CloneContext& ctx) const override;
/// the statement list
const tint::Vector<const Statement*, 8> statements;
/// the attribute list
const tint::Vector<const Attribute*, 4> attributes;
};
} // namespace tint::ast
#endif // SRC_TINT_LANG_WGSL_AST_BLOCK_STATEMENT_H_