isStringLiteral

bool isStringLiteral(const(char)[]  literal,  out  char  stringCloseChar,
		 out  bool  hasPostfix,  out  bool  parseEscapes,  out  int  prefixLength)

Checks if a string literal input has correct start/end sequences (quotes) to be any kind of D string literal.

Bugs

doesn't check for validity of token strings.

Standards

https://dlang.org/spec/lex.html#string_literals

fnbool isStringLiteral(const(char)[] literal)

ditto