Added short form for variable definitions

src/build/token/Keywords.go

@@ -2,6 +2,5 @@ package token
 
 // Keywords defines the keywords used in the language.
 var Keywords = map[string]bool{
-	"let":    true,
 	"return": true,
 }

src/build/token/List.go

@@ -13,7 +13,7 @@ func (list List) String() string {
 	var last Token
 
 	for _, t := range list {
-		if last.Kind == Keyword || last.Kind == Separator {
+		if last.Kind == Keyword || last.Kind == Separator || last.Kind == Operator || t.Kind == Operator {
 			builder.WriteByte(' ')
 		}
 

src/build/token/Tokenize.go

@@ -70,9 +70,6 @@ func Tokenize(buffer []byte) List {
 		case ']':
 			tokens = append(tokens, Token{ArrayEnd, i, arrayEndBytes})
 
-		case '=', ':', '+', '-', '*', '/', '<', '>', '!':
-			tokens = append(tokens, Token{Operator, i, buffer[i : i+1]})
-
 		// Separator
 		case ',':
 			tokens = append(tokens, Token{Separator, i, separatorBytes})
@@ -122,6 +119,24 @@ func Tokenize(buffer []byte) List {
 
 				continue
 			}
+
+			// Operators
+			if isOperator(buffer[i]) {
+				position := i
+				i++
+
+				for i < len(buffer) && isOperator(buffer[i]) {
+					i++
+				}
+
+				tokens = append(tokens, Token{
+					Operator,
+					position,
+					buffer[position:i],
+				})
+
+				continue
+			}
 		}
 
 		i++