diff options
Diffstat (limited to 'vendor/regex-syntax/src/hir')
| -rw-r--r-- | vendor/regex-syntax/src/hir/mod.rs | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/vendor/regex-syntax/src/hir/mod.rs b/vendor/regex-syntax/src/hir/mod.rs index e5ea3701b..062d4dcab 100644 --- a/vendor/regex-syntax/src/hir/mod.rs +++ b/vendor/regex-syntax/src/hir/mod.rs @@ -2481,16 +2481,24 @@ impl Properties { props.literal = props.literal && p.is_literal(); props.alternation_literal = props.alternation_literal && p.is_alternation_literal(); - if let Some(ref mut minimum_len) = props.minimum_len { + if let Some(minimum_len) = props.minimum_len { match p.minimum_len() { None => props.minimum_len = None, - Some(len) => *minimum_len += len, + Some(len) => { + // We use saturating arithmetic here because the + // minimum is just a lower bound. We can't go any + // higher than what our number types permit. + props.minimum_len = + Some(minimum_len.saturating_add(len)); + } } } - if let Some(ref mut maximum_len) = props.maximum_len { + if let Some(maximum_len) = props.maximum_len { match p.maximum_len() { None => props.maximum_len = None, - Some(len) => *maximum_len += len, + Some(len) => { + props.maximum_len = maximum_len.checked_add(len) + } } } } |