For my use case, I want to match relatively huge structs dynamically against user-written rules. I figured the evalexpr crate would be the best shot at this, as I can convert my struct into a context and then, using the predefined names from my struct, let users write their own rules as arithmetic expressions.

I want to implement some file contents mutation functionality in Rust, but I am a bit lost on how to achieve this using procedural macros. I have an input file that is specified using an environment variable at build time. I want to get the content of this file and apply some mutations to it.

Is there a way to adjust the macro below, in order to detect when the last argument of the macro call is a closure? The code below works, but it’s using the trick of using a semicolon, and that doesn’t look right.

Is there a way to adjust the macro below, in order to detect when the last argument of the macro call is a closure? The code below works, but it’s using the trick of using a semicolon, and that doesn’t look right.

Is there a way to adjust the macro below, in order to detect when the last argument of the macro call is a closure? The code below works, but it’s using the trick of using a semicolon, and that doesn’t look right.

Hello i try to implement fill array macro in Rust! And i have a problem!
My macro code:

how to add default type u8 to #[repr] attribute

how to add default type u8 to #[repr] attribute

Consider that we have a large automatically generated file(s) of C-style definitions of the form:

I’m trying to right a macro for a formatting library of sorts. The idea is you can use a mix of string literals, regular functions and (this is where I get stuck) inferred/scoped functions. I suspect I could get this working with proc macros, but that’s more complicated and I’d like to keep the code for the macro easier to read if possible.