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More let_else adoptions

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This commit is contained in:
est31 2022-02-02 12:45:20 +01:00
parent d5f9c40e6a
commit 670f5c6ef3
10 changed files with 210 additions and 228 deletions
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142
compiler/rustc_attr/src/builtin.rs
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@ -217,85 +217,81 @@ where
let mut issue_num = None;
let mut is_soft = false;
for meta in metas {
if let Some(mi) = meta.meta_item() {
match mi.name_or_empty() {
sym::feature => {
if !get(mi, &mut feature) {
continue 'outer;
}
}
sym::reason => {
if !get(mi, &mut reason) {
continue 'outer;
}
}
sym::issue => {
if !get(mi, &mut issue) {
continue 'outer;
}
// These unwraps are safe because `get` ensures the meta item
// is a name/value pair string literal.
issue_num = match issue.unwrap().as_str() {
"none" => None,
issue => {
let emit_diag = |msg: &str| {
struct_span_err!(
diagnostic,
mi.span,
E0545,
"`issue` must be a non-zero numeric string \
or \"none\"",
)
.span_label(
mi.name_value_literal_span().unwrap(),
msg,
)
.emit();
};
match issue.parse() {
Ok(0) => {
emit_diag(
"`issue` must not be \"0\", \
use \"none\" instead",
);
continue 'outer;
}
Ok(num) => NonZeroU32::new(num),
Err(err) => {
emit_diag(&err.to_string());
continue 'outer;
}
}
}
};
}
sym::soft => {
if !mi.is_word() {
let msg = "`soft` should not have any arguments";
sess.parse_sess.span_diagnostic.span_err(mi.span, msg);
}
is_soft = true;
}
_ => {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnknownMetaItem(
pprust::path_to_string(&mi.path),
&["feature", "reason", "issue", "soft"],
),
);
continue 'outer;
}
}
} else {
let Some(mi) = meta.meta_item() else {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnsupportedLiteral("unsupported literal", false),
);
continue 'outer;
};
match mi.name_or_empty() {
sym::feature => {
if !get(mi, &mut feature) {
continue 'outer;
}
}
sym::reason => {
if !get(mi, &mut reason) {
continue 'outer;
}
}
sym::issue => {
if !get(mi, &mut issue) {
continue 'outer;
}
// These unwraps are safe because `get` ensures the meta item
// is a name/value pair string literal.
issue_num = match issue.unwrap().as_str() {
"none" => None,
issue => {
let emit_diag = |msg: &str| {
struct_span_err!(
diagnostic,
mi.span,
E0545,
"`issue` must be a non-zero numeric string \
or \"none\"",
)
.span_label(mi.name_value_literal_span().unwrap(), msg)
.emit();
};
match issue.parse() {
Ok(0) => {
emit_diag(
"`issue` must not be \"0\", \
use \"none\" instead",
);
continue 'outer;
}
Ok(num) => NonZeroU32::new(num),
Err(err) => {
emit_diag(&err.to_string());
continue 'outer;
}
}
}
};
}
sym::soft => {
if !mi.is_word() {
let msg = "`soft` should not have any arguments";
sess.parse_sess.span_diagnostic.span_err(mi.span, msg);
}
is_soft = true;
}
_ => {
handle_errors(
&sess.parse_sess,
meta.span(),
AttrError::UnknownMetaItem(
pprust::path_to_string(&mi.path),
&["feature", "reason", "issue", "soft"],
),
);
continue 'outer;
}
}
}