b9b2546417
This allows us to avoid synthesizing tokens in `prepend_attr`, since we have the original tokens available. We still need to synthesize tokens when expanding `cfg_attr`, but this is an unavoidable consequence of the syntax of `cfg_attr` - the user does not supply the `#` and `[]` tokens that a `cfg_attr` expands to.
36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
//! Attributes injected into the crate root from command line using `-Z crate-attr`.
|
|
|
|
use rustc_ast::attr::mk_attr;
|
|
use rustc_ast::token;
|
|
use rustc_ast::{self as ast, AttrItem, AttrStyle};
|
|
use rustc_session::parse::ParseSess;
|
|
use rustc_span::FileName;
|
|
|
|
pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -> ast::Crate {
|
|
for raw_attr in attrs {
|
|
let mut parser = rustc_parse::new_parser_from_source_str(
|
|
parse_sess,
|
|
FileName::cli_crate_attr_source_code(&raw_attr),
|
|
raw_attr.clone(),
|
|
);
|
|
|
|
let start_span = parser.token.span;
|
|
let AttrItem { path, args, tokens: _ } = match parser.parse_attr_item(false) {
|
|
Ok(ai) => ai,
|
|
Err(mut err) => {
|
|
err.emit();
|
|
continue;
|
|
}
|
|
};
|
|
let end_span = parser.token.span;
|
|
if parser.token != token::Eof {
|
|
parse_sess.span_diagnostic.span_err(start_span.to(end_span), "invalid crate attribute");
|
|
continue;
|
|
}
|
|
|
|
krate.attrs.push(mk_attr(AttrStyle::Inner, path, args, start_span.to(end_span)));
|
|
}
|
|
|
|
krate
|
|
}
|