I'm about to write a parser for a language that's supposed to have strict syntactic rules about naming of types, variables and such. For example all classes must be PascalCase, and all variables/parameter names and other identifiers must be camelCase. For example <code>HTMLParser</code> is not allowed and must be named <code>HtmlParser</code>. Any ideas for a regexp that can match something that is PascalCase, but does not have two capital letters in it?

camelCase: <pre class="prettyprint"><code>^[a-z]+(?:[A-Z][a-z]+)*$ </code></pre> PascalCase: <pre class="prettyprint"><code>^[A-Z][a-z]+(?:[A-Z][a-z]+)*$ </code></pre>

Regex that matches Camel and Pascal Case

Tags:

regex

parsing

camelcasing

pascalcasing

I'm about to write a parser for a language that's supposed to have strict syntactic rules about naming of types, variables and such. For example all classes must be PascalCase, and all variables/parameter names and other identifiers must be camelCase.

For example HTMLParser is not allowed and must be named HtmlParser. Any ideas for a regexp that can match something that is PascalCase, but does not have two capital letters in it?

289

asked Jan 20 '10 17:01

Marcin

1 Answers

camelCase:

^[a-z]+(?:[A-Z][a-z]+)*$

PascalCase:

^[A-Z][a-z]+(?:[A-Z][a-z]+)*$

answered Oct 24 '22 13:10

Alix Axel

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