98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
// Copyright 2020 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_AST_BLOCK_STATEMENT_H_
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#define SRC_AST_BLOCK_STATEMENT_H_
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#include <utility>
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#include "src/ast/statement.h"
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namespace tint {
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namespace ast {
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/// A block statement
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class BlockStatement : public Castable<BlockStatement, Statement> {
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public:
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/// Constructor
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/// @param program_id the identifier of the program that owns this node
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/// @param source the block statement source
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/// @param statements the statements
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BlockStatement(ProgramID program_id,
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const Source& source,
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const StatementList& statements);
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/// Move constructor
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BlockStatement(BlockStatement&&);
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~BlockStatement() override;
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/// @returns the StatementList
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const StatementList& list() const { return statements_; }
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/// @returns true if the block is empty
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bool empty() const { return statements_.empty(); }
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/// @returns the number of statements directly in the block
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size_t size() const { return statements_.size(); }
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/// @returns the last statement in the block or nullptr if block empty
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const Statement* last() const {
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return statements_.empty() ? nullptr : statements_.back();
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}
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/// @returns the last statement in the block or nullptr if block empty
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Statement* last() {
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return statements_.empty() ? nullptr : statements_.back();
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}
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/// Retrieves the statement at `idx`
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/// @param idx the index. The index is not bounds checked.
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/// @returns the statement at `idx`
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Statement* get(size_t idx) const { return statements_[idx]; }
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/// Retrieves the statement at `idx`
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/// @param idx the index. The index is not bounds checked.
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/// @returns the statement at `idx`
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Statement* operator[](size_t idx) const { return statements_[idx]; }
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/// @returns the beginning iterator
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StatementList::const_iterator begin() const { return statements_.begin(); }
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/// @returns the ending iterator
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StatementList::const_iterator end() const { return statements_.end(); }
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/// @returns the statement list
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const StatementList& statements() const { return statements_; }
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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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BlockStatement* Clone(CloneContext* ctx) const override;
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/// Writes a representation of the node to the output stream
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/// @param sem the semantic info for the program
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/// @param out the stream to write to
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/// @param indent number of spaces to indent the node when writing
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void to_str(const sem::Info& sem,
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std::ostream& out,
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size_t indent) const override;
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private:
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BlockStatement(const BlockStatement&) = delete;
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StatementList const statements_;
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};
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} // namespace ast
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} // namespace tint
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#endif // SRC_AST_BLOCK_STATEMENT_H_
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