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refactor(lang): rename the fn keyword to function

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Expand the function-declaration keyword to the full word across the whole
language and toolchain:
  fn name(...) -> T { ... }   ->   function name(...) -> T { ... }

Done as a self-hosting migration: teach the parser both spellings, reseed,
rewrite every .ludic definition to `function`, then drop `fn`. The compiler
now rejects `fn`. Touches the parser, all selfhost/tools/runtime/example/test
sources, the grammars (TextMate shared+vscode, ludic_syntax.h, JetBrains
LudicTokens.kt), the LSP and formatter, the Python doc/vocab tools
(check-impl, check-docs, validate, palette, test-lsp), and the docs
(fences, prose, kw-fn -> kw-function).

Reseeded; C-free bootstrap fixpoint holds. All suites green (45 regression,
24 self-host, 29 tool); the docs site generates and check.py passes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Orkun ÇAKILKAYA 2026-08-30 01:43:22 +03:00
parent 2f19c8d8e2
commit 4c48077d68
86 changed files with 793 additions and 793 deletions
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4
tools/test-lsp.py
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@ -246,7 +246,7 @@ def main():
fh.write("program R {\n"
" property Pos { x: int = 0, y: int = 0 }\n"
" property Vel { x: int = 0 }\n"
" fn helper(x: int) -> int { return x + 1 }\n"
" function helper(x: int) -> int { return x + 1 }\n"
" handler A phase Update {\n"
" for (p) in query [Pos] {\n"
" let x = 5\n"
@ -275,7 +275,7 @@ def main():
lines_touched(field), [1, 7])
local = rename_at(position_of(atext, "let x = 5", 4))
check("renaming a local touches only that local", lines_touched(local), [6, 7])
param = rename_at(position_of(atext, "fn helper(x", 10))
param = rename_at(position_of(atext, "function helper(x", 16))
check("renaming a parameter touches only that function", lines_touched(param), [3])
check("renaming a parameter makes exactly two edits", len(param), 2)