Implemented for loops

tests/programs/index-dynamic.q

@@ -3,7 +3,7 @@ import mem
 main() {
 	a := mem.alloc(4)
 
-	loop i := 0..4 {
+	for i := 0..4 {
 		a[i] = i * 2
 		assert a[i] == i * 2
 	}

tests/programs/loop-for.q

@@ -0,0 +1,14 @@
+main() {
+	x := 0
+
+	for 0..5 {
+		x += 1
+	}
+
+	assert x == 5
+
+	for i := 0..5 {
+		assert i >= 0
+		assert i < 5
+	}
+}

tests/programs/loop-limited.q

@@ -1,6 +0,0 @@
-main() {
-	loop i := 0..10 {
-		assert i >= 0
-		assert i < 10
-	}
-}

tests/programs_test.go

@@ -59,7 +59,7 @@ var programs = []struct {
 	{"switch", "", "", 0},
 	{"loop-infinite", "", "", 0},
 	{"loop-lifetime", "", "", 0},
-	{"loop-limited", "", "", 0},
+	{"loop-for", "", "", 0},
 	{"memory-free", "", "", 0},
 	{"out-of-memory", "", "", 0},
 	{"index-static", "", "", 0},