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.
35 lines
1.1 KiB
Rust
35 lines
1.1 KiB
Rust
//! Attributes injected into the crate root from command line using `-Z crate-attr`.
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use rustc_ast::attr::mk_attr;
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use rustc_ast::token;
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use rustc_ast::{self as ast, AttrItem, AttrStyle};
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use rustc_session::parse::ParseSess;
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use rustc_span::FileName;
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pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -> ast::Crate {
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for raw_attr in attrs {
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let mut parser = rustc_parse::new_parser_from_source_str(
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parse_sess,
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FileName::cli_crate_attr_source_code(&raw_attr),
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raw_attr.clone(),
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);
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let start_span = parser.token.span;
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let AttrItem { path, args, tokens: _ } = match parser.parse_attr_item(false) {
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Ok(ai) => ai,
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Err(mut err) => {
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err.emit();
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continue;
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}
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};
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let end_span = parser.token.span;
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if parser.token != token::Eof {
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parse_sess.span_diagnostic.span_err(start_span.to(end_span), "invalid crate attribute");
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continue;
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}
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krate.attrs.push(mk_attr(AttrStyle::Inner, path, args, start_span.to(end_span)));
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}
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krate
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}
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