Create cursor.nim

src/cursor.nim

@@ -0,0 +1,21 @@
+import types
+
+type Cursor* = ref object of RootObj
+    data*: seq[Token]
+    index: int
+
+method go_to*(this: Cursor, index: int) {.base.} = 
+    this.index = index
+
+method get_index*(this: Cursor): int {.base.} =
+    return this.index
+
+method next*(this: Cursor): Token {.base.} =
+    if this.index < len(this.data):
+        inc this.index
+        return this.data[this.index - 1]
+
+iterator iter*(this: Cursor): Token =
+    while this.index < len(this.data):
+        inc this.index
+        yield this.data[this.index - 1]