plex

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⚠⚠⚠ Extreme compile times ⚠⚠⚠

2

As the grammar gets large, compile times grow a lot. A grammar similar to C but still a *lot* simpler takes about 2 or 3 minutes to compile and it...

martin-t

Hello I'm currently taking a lecture in the topic of lexical analyzers where we focus on flex. flex has a thing called [Starting Conditions](https://ftp.gnu.org/old-gnu/Manuals/flex-2.5.4/html_mono/flex.html#TOC11) where you can basically set the...

xFrednet

Warnings caused by plex macros

4

I started seeing these on the newest rust nightly ``` kai@kai-thinkpad ~/d/plex (master)> cargo test Compiling proc-macro2 v1.0.10 Compiling unicode-xid v0.2.0 Compiling bit-vec v0.4.4 Compiling syn v1.0.17 Compiling vec_map v0.6.0...

kaimast

Naming regex patterns?

1

Suppose I have this lexical syntax for a token: ``` Identifier ::= * Initial ::= a..z Subsequent ::= Initial | ... ``` Here the `Initial` part is used in both...

osa1

Rust stable

14

Hi! I'm not very familiar with Rust, but very excited by your library. Only my problem is I decided to keep on latest stable Rust. Is it very difficult to...

aptakhin

Tests

3

Automated testing is great! It would probably be a good idea to write some.

kazimuth

Hi, If I add a lifetime to my token enum like in the README, I have a hard time compiling the parser. Essentially I get the following error. ``` error[E0106]:...

kaimast

No way to pass additional args to the lexer

2

I needed to pass an interner to the lexer (to avoid calling `.to_owned()` for idents) but there doesn't seem to be a way to add it to the signature without...

martin-t

error recovery is important for practical parser, is there any plan that plex will support it? for example, when we are failed to parse a statement, we skip remaining tokens...

richox

Thanks for plex! Would it be feasible to support multiple entry points that reuse the same grammar? As an example, I have something like: ``` statement: Statement { expression[e] TokenSemicolon...

bendmorris