And stil... it can be cleaner and simpler.

value_boolean.go

@@ -4,15 +4,13 @@ import (
 	"git.makaay.nl/mauricem/go-parsekit/parse"
 )
 
-var (
 // Booleans are just the tokens you're used to. Always lowercase.
-	trueOrFalse = a.Str("true").Or(a.Str("false"))
-)
-
 func (t *parser) startBoolean(p *parse.API) {
 	switch {
-	case p.Accept(tok.Boolean(nil, trueOrFalse)):
-		t.emitCommand(csetBoolVal, p.Result().Value(0).(bool))
+	case p.Accept(a.Str("true")):
+		t.emitCommand(csetBoolVal, true)
+	case p.Accept(a.Str("false")):
+		t.emitCommand(csetBoolVal, false)
 	default:
 		p.Expected("true or false")
 	}