bind expression (:=) instead of let

2024-03-21 17:43:03 -04:00
parent 66d5453ecc
commit 6282075e66
36 changed files with 425 additions and 583 deletions
--- a/lexer/lexer.go
+++ b/lexer/lexer.go
@@ -134,7 +134,14 @@ func (l *Lexer) NextToken() token.Token {
 	case ']':
 		tok = newToken(token.RBRACKET, l.ch)
 	case ':':
-		tok = newToken(token.COLON, l.ch)
+		if l.peekChar() == '=' {
+			ch := l.ch
+			l.readChar()
+			literal := string(ch) + string(l.ch)
+			tok = token.Token{Type: token.BIND, Literal: literal}
+		} else {
+			tok = newToken(token.COLON, l.ch)
+		}
 	default:
 		if isLetter(l.ch) {
 			tok.Literal = l.readIdentifier()