Add literals highlighting

queries/highlights.scm

@@ -3,4 +3,17 @@
  (block_comment)
 ] @comment
 
+; Literal {{{
+(boolean_literal) @boolean
+
+(integer_literal) @number
+
+[
+ (raw_string_literal)
+ (interpreted_string_literal)
+] @string
+
+(escape_sequence) @string.escape
+; }}}
+
 ; vim: sw=2 foldmethod=marker

test/highlight/litterals.bp

@@ -0,0 +1,19 @@
+foo = 0
+//    ^ number
+
+foo = -42
+//    ^ number
+
+foo = true
+//    ^ boolean
+
+foo = "foo\nbar"
+//    ^ string
+//        ^ string.escape
+//         ^ string.escape
+//          ^ string
+//            ^ string
+
+foo = `baz`
+//    ^ string
+//        ^ string