Comments (10)
General Documentation now at https://janet-lang.org/introduction.html
I have moved the documentation into the janet-lang.org repository so that documentation could go on the website. Also, the Introduction has been broken up into multiple pages for better organization.
Peg docs at https://janet-lang.org/peg.html
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Should look better now. For further issues and fixes with the website, post them in the website repo.
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PEGs now are compiled to a bytecode format that is faster. Pegs can also be pre-compiled and get better error messages now. I have been adding more tests to the test suite for testing captures and other features.
Use (peg/compile peg)
to compile a Janet data structure to a peg.
NOTE: Some docs coming on PEGs, but since I'm still fiddling with the interface things aren't finalized yet.
from janet.
This is computer science for me, but, can PEG replace parse.c in the future?
from janet.
With a few changes, it probably could, but I probably won't. Janet's grammar is certainly simple enough to be easily recognized by a PEG.
- parse.c already works
- parse.c can be suspended and started later (need for efficient repl)
- parse.c has good error reporting
- parse.c will be faster (it's pure C)
- parse.c enables manipulating and querying parser state externally, needed for for repl and error reporting/recovery (
(parser/has-more), (parser/state), (parser/where)
)
The PEG is more for things like interfacing with external small languages, syntax highlighting, and replacing a regex engine or pattern matching library. I put peg in Janet because I wanted some pattern matching facilities and was inspired by Red/REBOL parse.
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I see. Red/REBOL parse is really cool indeed!
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Initial PEG doc at https://github.com/janet-lang/janet/blob/master/doc/Peg.md. Interface should be stabalizing soon!
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Now on mobiles overall site looks squeezed. :(
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Ugh, you’re right. I was doing a lot of refactoring on the website, I will fix mobile soon.
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I'm closing this - any issues with the PEG should go in a new issue.
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Related Issues (20)
- The default meson option `epoll=false` causes a busy loop and segmentation fault. HOT 10
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- Reimplement `slurp` with `os/open`. HOT 28
- A way to read standard input in the background without `file/read` in a thread. HOT 4
- `each` macro improper behavior? HOT 8
- `if-let` breaks tail call optimization. HOT 6
- false branch of `if-let` doesn't report the correct call stack information. HOT 4
- `ev/select` should not resume a dead task. HOT 4
- `try` and `defer` break tail call optimization. HOT 4
- `(= @"update" @"update")` is `false`. HOT 3
- `ev/select` still revives fibers.... HOT 3
- option to unbundle docstrings and potential consequences HOT 8
- splicing into structs/tables HOT 2
- Disasm/asm doesn't round-trip for function with unused argument HOT 1
- eventloop/networking gets stuck on musl HOT 11
- Consider making `module/paths` a dynamic variable HOT 7
- Can it run on iOS? Thank you. HOT 3
- `os/strftime` doesn't respect environment variables. HOT 3
- Re-integrate jpm into janet HOT 49
- recent change kinda breaks lexical scope with multiple modules HOT 2
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