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//! 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(
&parse_sess.attr_id_generator,
AttrStyle::Inner,
path,
args,
start_span.to(end_span),
));
}
krate
}
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