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问题描述
我将为一种语言编写一个解析器，该语言应该具有关于类型，变量等的命名的严格语法规则.例如，所有类必须必须是PascalCase，所有变量/参数名称和其他标识符必须必须是camelCase.
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.
例如，不允许HTMLParser，并且必须将其命名为HtmlParser.有什么正则表达式的想法可以匹配PascalCase，但其中没有两个大写字母吗?
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?
推荐答案
camelCase:
^[a-z]+(?:[A-Z][a-z]+)*$
PascalCase:
^[A-Z][a-z]+(?:[A-Z][a-z]+)*$
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