lab/sx - sx - Gitea: Git with a cup of tea

lab/sx

Author SHA1 Message Date

Author	SHA1	Message	Date
agra	1b777dd6ab	ERR/E0.2: raise / try / catch / onfail + precedence + consumer-aware pipe (parser) Parser-only second step of the error-handling stream. No sema/codegen. - token: 4 keywords — `raise`, `try`, `catch`, `onfail`. - ast: RaiseStmt, TryExpr, CatchExpr {operand, binding?, body, is_match_body}, OnFailStmt {binding?, body}. - parser: - `try` is a unary prefix (binds tighter than `or`; right-recursive so it stacks under `xx`/`@`/etc). - `or` is already left-associative (precedence-climbing loop) — no change. - `catch` is a postfix with four body shapes (no-binding block / block / bare-expr / `== { case }` match-body, the latter reusing parseMatchBody with the binding as subject). - `raise EXPR;` and `onfail [e] { } \| onfail EXPR;` statements; `error` parses in expression position so `raise error.X` works; raise rejected in expression position and inside an onfail body (in_onfail_body flag). - consumer-aware `\|>`: pipes the LHS into the head call through a try/catch/or wrapper, preserving the wrapper. - print: printExpr + match-arm printing for round-trips (anyerror!void to break the printExpr<->printMatchArms inferred-error-set loop). - sema/lsp: exhaustive switch arms for the 4 nodes + 4 keyword tokens. - tests: ~22 inline parser tests (precedence, all catch forms, both rejections, pipe cases, round-trip prints incl. match-body). zig build, zig build test (264), and 254/254 examples green.	2026-05-31 17:07:49 +03:00
agra	e88ee66953	ERR/E0.1: error-set decls + `!` / `!Named` type exprs (parser) Parser-only first step of the error-handling stream. No sema/codegen. - token: `kw_error` keyword (`!` reuses existing `.bang`). - ast: `ErrorSetDecl { name, tag_names }` + `ErrorTypeExpr { name: ?[] }` (null = inferred `!`, non-null = `!Named`); wired into Node.Data and declName. - parser: `parseErrorSetDecl` (comma-separated tags, optional trailing comma/`;`) dispatched from parseConstBinding; `!` / `!Named` parsed in parseTypeExpr; result-list loop enforces error type as trailing-only; hasFnBodyAfterArrow skips `.bang` so failable-return fns are recognised. - print: new focused AST round-trip printer (decls + type exprs); loud `error.UnsupportedNode` otherwise. Registered in root.zig. - sema/lsp: exhaustive switch arms for the two new nodes. - tests: 11 inline parser unit tests (shapes + 3 round-trip prints + 2 trailing-position rejections). zig build, zig build test, and 254/254 examples green.	2026-05-31 16:40:22 +03:00

agra

1b777dd6ab

ERR/E0.2: raise / try / catch / onfail + precedence + consumer-aware pipe (parser)

Parser-only second step of the error-handling stream. No sema/codegen.

- token: 4 keywords — `raise`, `try`, `catch`, `onfail`.
- ast: RaiseStmt, TryExpr, CatchExpr {operand, binding?, body, is_match_body},
  OnFailStmt {binding?, body}.
- parser:
  - `try` is a unary prefix (binds tighter than `or`; right-recursive so it
    stacks under `xx`/`@`/etc).
  - `or` is already left-associative (precedence-climbing loop) — no change.
  - `catch` is a postfix with four body shapes (no-binding block / block /
    bare-expr / `== { case }` match-body, the latter reusing parseMatchBody
    with the binding as subject).
  - `raise EXPR;` and `onfail [e] { } | onfail EXPR;` statements; `error`
    parses in expression position so `raise error.X` works; raise rejected
    in expression position and inside an onfail body (in_onfail_body flag).
  - consumer-aware `|>`: pipes the LHS into the head call through a
    try/catch/or wrapper, preserving the wrapper.
- print: printExpr + match-arm printing for round-trips (anyerror!void to
  break the printExpr<->printMatchArms inferred-error-set loop).
- sema/lsp: exhaustive switch arms for the 4 nodes + 4 keyword tokens.
- tests: ~22 inline parser tests (precedence, all catch forms, both
  rejections, pipe cases, round-trip prints incl. match-body).

zig build, zig build test (264), and 254/254 examples green.

2026-05-31 17:07:49 +03:00

agra

e88ee66953

ERR/E0.1: error-set decls + ! / !Named type exprs (parser)

Parser-only first step of the error-handling stream. No sema/codegen.

- token: `kw_error` keyword (`!` reuses existing `.bang`).
- ast: `ErrorSetDecl { name, tag_names }` + `ErrorTypeExpr { name: ?[] }`
  (null = inferred `!`, non-null = `!Named`); wired into Node.Data and
  declName.
- parser: `parseErrorSetDecl` (comma-separated tags, optional trailing
  comma/`;`) dispatched from parseConstBinding; `!` / `!Named` parsed in
  parseTypeExpr; result-list loop enforces error type as trailing-only;
  hasFnBodyAfterArrow skips `.bang` so failable-return fns are recognised.
- print: new focused AST round-trip printer (decls + type exprs); loud
  `error.UnsupportedNode` otherwise. Registered in root.zig.
- sema/lsp: exhaustive switch arms for the two new nodes.
- tests: 11 inline parser unit tests (shapes + 3 round-trip prints + 2
  trailing-position rejections).

zig build, zig build test, and 254/254 examples green.

2026-05-31 16:40:22 +03:00

2 Commits