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Enforce 80 char lines in extended errors.

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This commit is contained in:
Michael Sproul 2015-04-15 21:54:01 +10:00
parent c54f43a5d1
commit 6d2b6d5a19
2 changed files with 20 additions and 9 deletions
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15
src/libsyntax/diagnostics/plugin.rs
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@ -20,6 +20,9 @@ use parse::token;
use ptr::P;
use util::small_vector::SmallVector;
// Maximum width of any line in an extended error description (inclusive).
const MAX_DESCRIPTION_WIDTH: usize = 80;
thread_local! {
static REGISTERED_DIAGNOSTICS: RefCell<BTreeMap<Name, Option<Name>>> = {
RefCell::new(BTreeMap::new())
@ -92,16 +95,22 @@ pub fn expand_register_diagnostic<'cx>(ecx: &'cx mut ExtCtxt,
}
_ => unreachable!()
};
// Check that the description starts and ends with a newline.
// Check that the description starts and ends with a newline and doesn't
// overflow the maximum line width.
description.map(|raw_msg| {
let msg = raw_msg.as_str();
let last = msg.len() - 1;
if &msg[0..1] != "\n" || &msg[last..] != "\n" {
if !msg.starts_with("\n") || !msg.ends_with("\n") {
ecx.span_err(span, &format!(
"description for error code {} doesn't start and end with a newline",
token::get_ident(*code)
));
}
if msg.lines().any(|line| line.len() > MAX_DESCRIPTION_WIDTH) {
ecx.span_err(span, &format!(
"description for error code {} contains a line longer than {} characters",
token::get_ident(*code), MAX_DESCRIPTION_WIDTH
));
}
raw_msg
});
with_registered_diagnostics(|diagnostics| {