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Rename the Finch file extension from .fn to .fch

Browse source 
.fn is already used by other tools (e.g. Fennel). Modules are now looked up as name.fch;
a leftover name.fn gets a clear message telling you to rename it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-08 19:27:42 +02:00
commit f897fb3140
92 changed files with 160 additions and 144 deletions
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28
README.md
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@ -40,7 +40,7 @@ fn main() {
Operator precedence that does not bite (`x & 1 == 0` means what it says).
- **Errors that talk like a person:**
```
game.fn:3:13: error: 'y' must be i32, but this is int (use i32(...) to convert)
game.fch:3:13: error: 'y' must be i32, but this is int (use i32(...) to convert)
3 | i32 y = x
| ^
```
@ -60,9 +60,9 @@ nix-shell # or install LLVM 21 + libclang + cmake + ni
cmake -S . -B build -G Ninja
ninja -C build
./build/finch run examples/hello.fn
./build/finch build examples/tour.fn -o tour && ./tour
tests/run.sh # 58 passed, 0 failed
./build/finch run examples/hello.fch
./build/finch build examples/tour.fch -o tour && ./tour
tests/run.sh # 59 passed, 0 failed
tests/boot.sh # the compiler written in Finch builds itself
```
@ -97,16 +97,16 @@ Pick the guide that fits you:
| File | Shows |
|---|---|
| [`examples/hello.fn`](examples/hello.fn) | the smallest program |
| [`examples/tour.fn`](examples/tour.fn) | variables, functions, conditions, loops |
| [`examples/guess.fn`](examples/guess.fn) | a guessing game: input, loops, C's `rand` |
| [`examples/todo.fn`](examples/todo.fn) | structs, arrays, strings and files |
| [`examples/structs.fn`](examples/structs.fn) | structs, arrays of structs, a linked list with `new`/`free` |
| [`examples/types.fn`](examples/types.fn) | sized numbers and pointers |
| [`examples/c_import.fn`](examples/c_import.fn) | `printf`, `math.h`, `malloc`/`free`, `stderr` |
| [`examples/window.fn`](examples/window.fn) | a GLFW + OpenGL window |
| [`examples/raylib.fn`](examples/raylib.fn) | raylib with C structs by value |
| [`examples/llvm.fn`](examples/llvm.fn) | Finch building LLVM IR through the LLVM-C API |
| [`examples/hello.fch`](examples/hello.fch) | the smallest program |
| [`examples/tour.fch`](examples/tour.fch) | variables, functions, conditions, loops |
| [`examples/guess.fch`](examples/guess.fch) | a guessing game: input, loops, C's `rand` |
| [`examples/todo.fch`](examples/todo.fch) | structs, arrays, strings and files |
| [`examples/structs.fch`](examples/structs.fch) | structs, arrays of structs, a linked list with `new`/`free` |
| [`examples/types.fch`](examples/types.fch) | sized numbers and pointers |
| [`examples/c_import.fch`](examples/c_import.fch) | `printf`, `math.h`, `malloc`/`free`, `stderr` |
| [`examples/window.fch`](examples/window.fch) | a GLFW + OpenGL window |
| [`examples/raylib.fch`](examples/raylib.fch) | raylib with C structs by value |
| [`examples/llvm.fch`](examples/llvm.fch) | Finch building LLVM IR through the LLVM-C API |
| [`boot/`](boot/) | the Finch compiler, written in Finch |
## Roadmap