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// Copyright (C) 2025 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#ifndef RUST_DESUGAR_WHILE_LET_H
#define RUST_DESUGAR_WHILE_LET_H
#include "rust-ast-builder.h"
#include "rust-expr.h"
namespace Rust {
namespace AST {
// Desugar while-let into a set of other AST nodes. The desugar is of the
// following form:
//
// ```
// whilet let <pat> = <expr> <body>
// ```
//
// becomes:
//
// ```
// loop {
// match <expr> {
// <pat> => <body>,
// _ => break
// }
// }
// ```
class DesugarWhileLet
{
public:
static void go (std::unique_ptr<Expr> &ptr);
private:
DesugarWhileLet ();
struct DesugarCtx
{
DesugarCtx (location_t loc) : builder (Builder (loc)), loc (loc) {}
Builder builder;
location_t loc;
MatchCase make_break_arm ();
MatchCase make_continue_arm (std::unique_ptr<Pattern> &&pattern,
std::unique_ptr<BlockExpr> &&body);
};
std::unique_ptr<Expr> desugar (WhileLetLoopExpr &expr);
};
} // namespace AST
} // namespace Rust
#endif // ! RUST_DESUGAR_WHILE_LET_H
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