clang-tidy中readability-identifier-naming规则IgnoredRegexp正则表达式使用正确性咨询

The core issue here is that your regex pattern uses invalid syntax for the ECMAScript-style regular expressions clang-tidy relies on. The * quantifier in regex requires a preceding element to apply to—writing *_type doesn’t mean "any characters followed by _type"; instead, it’s a syntax error because there’s nothing before the * to quantify.

Correcting the Regex #

To match identifiers ending with _type, exactly equal to reference, or ending with iterator, you need to adjust your regex to follow valid syntax rules:

• Use .* to match zero or more of any character (the "anything" part you were trying to express)
• Add $ to anchor matches at the end of the identifier, ensuring you only catch suffixes (not partial matches in the middle of a name)
• Use ^ and $ together for exact matches like reference

Here’s the corrected pattern:

^reference$|.*(_type|iterator)$

Breaking this down:

• ^reference$: Matches identifiers that are exactly reference (no extra characters before or after)
• .*(_type|iterator)$: Matches any identifier ending with _type or iterator

Updated .clang-tidy Configuration #

Replace your existing ignored regex lines with the corrected pattern:

Checks: 'readability-*'
CheckOptions:
  - key: readability-identifier-naming.TypeAliasCase
    value: CamelCase
  - key: readability-identifier-naming.TypeAliasIgnoredRegexp
    value: '^reference$|.*(_type|iterator)$'
  - key: readability-identifier-naming.TypedefCase
    value: CamelCase
  - key: readability-identifier-naming.TypedefIgnoredRegexp
    value: '^reference$|.*(_type|iterator)$'

Testing the Fix #

With this configuration, your example definitions will no longer trigger warnings:

• using value_type = T;: Matches .*_type$ → ignored
• using reference = value_type&;: Matches ^reference$ → ignored
• using const_iterator = const T*;: Matches .*iterator$ → ignored

If you also want to ignore identifiers ending with reference (not just the exact word), adjust the regex to .*(_type|reference|iterator)$ instead.

内容的提问来源于stack exchange，提问作者PHD