src/libsyntax_ext/cmdline_attrs.rs

   1 //! Attributes injected into the crate root from command line using `-Z crate-attr`.
   2
   3 use syntax::ast::{self, AttrStyle};
   4 use syntax::attr::mk_attr;
   5 use syntax::panictry;
   6 use syntax::parse::{self, token, ParseSess};
   7 use syntax_pos::FileName;
   8
   9 pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -> ast::Crate {
  10     for raw_attr in attrs {
  11         let mut parser = parse::new_parser_from_source_str(
  12             parse_sess,
  13             FileName::cli_crate_attr_source_code(&raw_attr),
  14             raw_attr.clone(),
  15         );
  16
  17         let start_span = parser.token.span;
  18         let (path, tokens) = panictry!(parser.parse_meta_item_unrestricted());
  19         let end_span = parser.token.span;
  20         if parser.token != token::Eof {
  21             parse_sess.span_diagnostic
  22                 .span_err(start_span.to(end_span), "invalid crate attribute");
  23             continue;
  24         }
  25
  26         krate.attrs.push(mk_attr(AttrStyle::Inner, path, tokens, start_span.to(end_span)));
  27     }
  28
  29     krate
  30 }