antlr-font-lock-literal-regexpantlr-font-lock-literal-regexp is a variable defined in `
antlr-mode.el'. Its value is
"\"\\(\\sw\\(\\sw\\|-\\)*\\)\""Documentation: Regexp matching literals with special syntax highlighting, or nil. If nil, there is no special syntax highlighting for some literals. Otherwise, it should be a regular expression which must contain a regexp group. The string matched by the first group is highlighted with `antlr-font-lock-literal-face'. You can customize this variable.