| // 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 |
