bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Match crate and slug names

Browse source
This commit is contained in:
mejrs 2022-11-07 19:47:32 +01:00
parent 736c675d2a
commit fe212eca76
17 changed files with 652 additions and 605 deletions
Download patch file Download diff file Expand all files Collapse all files

54
compiler/rustc_macros/src/diagnostics/diagnostic.rs
View file

@ -46,7 +46,9 @@ impl<'a> DiagnosticDerive<'a> {
return DiagnosticDeriveError::ErrorHandled.to_compile_error();
}
Some(slug) => {
let check = make_check(slug);
quote! {
#check
let mut #diag = #handler.struct_diagnostic(rustc_errors::fluent::#slug);
}
}
@ -128,7 +130,14 @@ impl<'a> LintDiagnosticDerive<'a> {
.emit();
return DiagnosticDeriveError::ErrorHandled.to_compile_error();
}
Some(slug) => quote! { rustc_errors::fluent::#slug.into() },
Some(slug) => {
let check = make_check(slug);
quote! {
#check
rustc_errors::fluent::#slug.into()
}
}
}
});
@ -151,3 +160,46 @@ impl<'a> LintDiagnosticDerive<'a> {
})
}
}
/// Checks whether the slug starts with the crate name it's in.
fn make_check(slug: &syn::Path) -> TokenStream {
quote! {
const _: () = {
let krate = env!("CARGO_MANIFEST_DIR").as_bytes();
let mut start = 0;
while !(krate[start] == b'r'
&& krate[start + 1] == b'u'
&& krate[start + 2] == b's'
&& krate[start + 3] == b't'
&& krate[start + 4] == b'c'
&& krate[start + 5] == b'_')
{
if krate.len() == start + 5 {
panic!(concat!("crate does not contain \"rustc_\": ", env!("CARGO_MANIFEST_DIR")));
}
start += 1;
}
start += 6;
let slug = stringify!(#slug).as_bytes();
let mut pos = 0;
loop {
let b = slug[pos];
if krate.len() == start + pos {
if b != b'_' {
panic!(concat!("slug \"", stringify!(#slug), "\" does not match the crate (", env!("CARGO_MANIFEST_DIR") ,") it is in"));
}
break
}
let a = krate[start+pos];
if a != b {
panic!(concat!("slug \"", stringify!(#slug), "\" does not match the crate (", env!("CARGO_MANIFEST_DIR") ,") it is in"));
}
pos += 1;
}
};
}
}