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dtolnay
Parser for Rust source code
Use case from #rust: checking if the `segments[..segments.len() - 1]` prefix of a Path is equal to some specific prefix.
```rust extern "C" fn atexit_callback() { let _ = syn::parse_file("..."); } fn main() { unsafe { libc::atexit(atexit_callback); } } ``` This panicks while constructing a syn::Error parse error. ```console thread...
For parsing the parenthesized part of an attribute like #\[attribute(k = "v")\], `parse_macro_input!(args as AttributeArgs)` works when `attribute` is the currently expanding macro, but if `attribute` is just an inert...
This is used in the [`Parse` impl for `Arm`](https://github.com/dtolnay/syn/blob/80c6889684da7e0a30ef5d0b03e9d73fa6160541/src/expr.rs#L2586), and would be useful when building custom parsing inside and around match statements. CC: udoprog/genco#12
Various pieces of syntax in the parser are currently not robust to idents being wrapped by rustc in a None-delimited group, such as if the ident is associated with a...
The `derive(HeapSize)` example [recursively calls `heap_size_of_children` on fields](https://github.com/dtolnay/syn/blob/master/examples/heapsize/heapsize_derive/src/lib.rs#L64), but without adding the correct bound to the fields (`f.ty: HeapSize`). Instead, [trait bounds are added to generic parameters](https://github.com/dtolnay/syn/blob/master/examples/heapsize/heapsize_derive/src/lib.rs#L39). Why? I guess...
[Current:](https://docs.rs/syn/1.0/syn/parse/struct.ParseBuffer.html#method.parse_terminated) ```rust input.parse_terminated::(MyAttr::parse) ``` Proposed: ```rust input.parse_terminated(MyAttr::parse, Token![,]) ```
Use the verbatim variant idea from #251 to parse a braced expression in #263 as just a verbatim tokenstream expression.
This snippet of code from `dtoa` fails parsing with `syn` 1.0.13: ```rust pub trait Floating { fn write(self, W) -> io::Result; } ``` Giving the error ``Error("expected `:`")``. This is...
I'm trying to parse a macro call (along the lines of `foo! { }`) inside an `ItemFn`. When looking at `Stmt`, I initially guessed this would be an expression, and...
