1 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
3 #![feature(box_patterns)]
6 #![feature(proc_macro_internals)]
7 #![feature(proc_macro_quote)]
8 #![feature(rustc_diagnostic_macros)]
9 #![feature(crate_visibility_modifier)]
10 #![feature(specialization)]
11 #![feature(rustc_private)]
13 #![recursion_limit="256"]
15 #![deny(rust_2018_idioms)]
18 #[allow(unused_extern_crates)]
19 extern crate serialize as rustc_serialize; // used by deriving
20 extern crate proc_macro;
25 extern crate rustc_data_structures;
45 pub fn validate_crate_name(
46 sess: Option<&rustc::session::Session>,
48 sp: Option<syntax_pos::Span>
50 let mut err_count = 0;
52 let mut say = |s: &str| {
54 (_, None) => bug!("{}", s),
55 (Some(sp), Some(sess)) => sess.span_err(sp, s),
56 (None, Some(sess)) => sess.err(s),
61 say("crate name must not be empty");
64 if c.is_alphanumeric() { continue }
65 if c == '_' { continue }
66 say(&format!("invalid character `{}` in crate name: `{}`", c, s));
71 sess.unwrap().abort_if_errors();
75 __build_diagnostic_array! { librustc_metadata, DIAGNOSTICS }