Can't seem to access peg binary when peg is specified as cargo dependency about rust-peg HOT 6 CLOSED

The easier way to use rust-peg with Cargo is to use it as a syntax extension. It makes rustc compile the grammar when it compiles the crate. I should probably update the readme with those instructions, since it's the primary way to use rust-peg at this point...

Use

#[phase(plugin)] extern crate peg_syntax_ext;
peg_file! grammar("yourfile.rustpeg")

grammar::rule(source)

example

However, syntax extensions won't be enabled in Rust 1.0. They've promised giving Cargo the ability to preprocess source like this, but I haven't seen documentation on that yet.

from rust-peg.

The closest thing I saw was that cargo supports having a build script but this doesn't do me any good in this case if I can't access executables from crates.

Even if they weren't removing that in 1.0, I'd prefer to have a separate file for my grammar.

Anyways, thanks for the response. I'll figure something out.

from rust-peg.

The closest thing I saw was that cargo supports having a build script but this doesn't do me any good in this case if I can't access executables from crates.

If the build script can access libraries from crates, we could add a library to rust-peg that would be convenient to call from the build script.

Even if they weren't removing that in 1.0, I'd prefer to have a separate file for my grammar.

With the syntax extension, you can have the grammar either an inline string with peg or an external file with peg_file.

from rust-peg.

Ohhh wow, I missed the peg_file!.

I still would have to say that I personally like having that taken care of and generated outside of my other source code files, but this is a step in the right direction for me. However, it sounds like syntax extensions are going away.

Thanks!

from rust-peg.

They're not going away in the nightly builds; they're just being disabled in 1.0 release builds because the APIs they need won't be considered stable with the 1.0 release.

from rust-peg.

Closing in favor of #121

from rust-peg.