Add additional tokens

akos011221 · Oct 6, 2024 · 1ec5781 · 1ec5781
1 parent 3e8dd1e
commit 1ec5781
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Showing 3 changed files with 36 additions and 3 deletions.
diff --git a/lexer/lexer.go b/lexer/lexer.go
@@ -20,10 +20,22 @@ func (l *Lexer) NextToken() token.Token {
 		tok = newToken(token.COMMA, l.ch)
 	case '+':
 		tok = newToken(token.PLUS, l.ch)
+	case '-':
+		tok = newToken(token.MINUS, l.ch)
+	case '*':
+		tok = newToken(token.ASTERISK, l.ch)
+	case '/':
+		tok = newToken(token.SLASH, l.ch)
+	case '<':
+		tok = newToken(token.LT, l.ch)
+	case '>':
+		tok = newToken(token.GT, l.ch)
 	case '{':
 		tok = newToken(token.LBRACE, l.ch)
 	case '}':
 		tok = newToken(token.RBRACE, l.ch)
+	case '!':
+		tok = newToken(token.BANG, l.ch)
 	case 0:
 		tok.Literal = ""
 		tok.Type = token.EOF

diff --git a/lexer/lexer_test.go b/lexer/lexer_test.go
@@ -14,7 +14,9 @@ let add = fn(x, y) {
 x + y;
 };
 
-let result = add(five, ten);`
+let result = add(five, ten);
+!-/*5;
+5 < 10 > 5;`
 
 	tests := []struct {
 		expectedType    token.TokenType
@@ -56,6 +58,18 @@ let result = add(five, ten);`
 		{token.IDENT, "ten"},
 		{token.RPAREN, ")"},
 		{token.SEMICOLON, ";"},
+		{token.BANG, "!"},
+		{token.MINUS, "-"},
+		{token.SLASH, "/"},
+		{token.ASTERISK, "*"},
+		{token.INT, "5"},
+		{token.SEMICOLON, ";"},
+		{token.INT, "5"},
+		{token.LT, "<"},
+		{token.INT, "10"},
+		{token.GT, ">"},
+		{token.INT, "5"},
+		{token.SEMICOLON, ";"},
 		{token.EOF, ""},
 	}
 

diff --git a/token/token.go b/token/token.go
@@ -28,8 +28,15 @@ const (
 	INT   = "INT"   // 123456
 
 	// Operators
-	ASSIGN = "="
-	PLUS   = "+"
+	ASSIGN   = "="
+	PLUS     = "+"
+	MINUS    = "-"
+	BANG     = "!"
+	ASTERISK = "*"
+	SLASH    = "/"
+
+	LT = "<"
+	GT = ">"
 
 	// Delimeters
 	COMMA     = ","