parser: WIP

Signed-off-by: Alejandro Mery <amery@jpi.io>

parser/lexer_error.go

@@ -13,3 +13,7 @@ func (p *Parser) emitError(content string, err error) (lexer.StateFn, error) {
 		return nil, err
 	}
 }
+
+func (p *Parser) emitInvalidRune(r rune) (lexer.StateFn, error) {
+	return p.emitError(string([]rune{r}), lexer.ErrUnacceptableRune)
+}