Added for.

src/asl/parser.go

@@ -25,6 +25,8 @@ func parseBlock() {
         parseWhile()
     } else if accept("switch") {
         parseSwitch()
+    } else if accept("for") {
+        parseFor()
     } else if accept("func") {
         parseFunction()
     } else {
@@ -121,6 +123,30 @@ func parseSwitchBlock() {
     parseSwitchBlock()
 }
 
+func parseFor() {
+    expect("for")
+    appendOut("for [{")
+    
+    // var in first assignment is optional
+    if accept("var") {
+        next()
+    }
+    
+    parseExpression()
+    expect(";")
+    appendOut("}, {")
+    parseExpression()
+    expect(";")
+    appendOut("}, {")
+    parseExpression()
+    expect(";")
+    appendOut("}] do {\n")
+    expect("{")
+    parseBlock()
+    expect("}")
+    appendOut("};\n")
+}
+
 func parseFunction() {
     expect("func")
     appendOut(get().token+" = {\n")

src/asl/tokenizer.go

@@ -27,6 +27,7 @@ var keywords = []string{"var",
     "if",
     "while",
     "switch",
+    "for",
     "func",
     "true",
     "false",