try-catch #3

2026-06-26T15:14:41+08:00

elmma commented

2026-06-26 15:14:41 +08:00

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elmma added 2 commits 2026-06-26 15:14:41 +08:00

feat: try-catch-finally 异常处理 a70e5fbc30

语法: try { ... } catch (e) { ... } finally { ... }
catch 和 finally 都是可选的，但至少需要一个。throw expr 抛出任意值。

- Lexer: 新增 try, catch, finally, throw 关键字
- AST: Stmt::Try { body, catch_var, catch_body, finally_body } + Stmt::Throw(Expr)
- Parser: try/catch/finally/throw 语句解析，更新 synchronize()
- Opcode: Throw = 46，FunctionProto 新增 exception_handlers 表
- ExceptionHandler: { try_start, try_end, catch_ip, catch_slot, finally_ip }
- Compiler: compile_try 将 finally 在成功/异常两条路径各内联一次
- VM: unwind() 栈展开 + find_handler() 处理器搜索
- RuntimeError（除零、未定义变量等）在 try 块内自动转为可捕获异常
- LSP: 补全关键字列表追加

已知限制: return/break/continue 在 try-finally 内部不会先执行 finally

16 个新测试，全部 343 个测试通过。

Co-Authored-By: Claude <noreply@anthropic.com>

fix: LSP补全触发和语法高亮更新 af63957b11

- completion_provider 注册 a-z A-Z _ . 为触发字符，解决 Copilot 拦截补全问题
- 语法高亮新增 try catch finally throw 关键字

Co-Authored-By: Claude <noreply@anthropic.com>

elmma merged commit 10c429cb68 into vm-bytecode

2026-06-26 15:14:45 +08:00

elmma referenced this issue from a commit

2026-06-26 15:14:47 +08:00

Merge pull request 'try-catch' (#3) from try-catch into vm-bytecode

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Reference: elmma/aster#3