Create ast package

smnp/ast/parsers/block.py

@@ -0,0 +1,46 @@
+from smnp.ast.node.block import BlockNode, CloseBlockNode, BlockItemNode
+from smnp.token.type import TokenType
+
+
+def parseBlock(input, parent):
+    # '{'
+    if input.current().type == TokenType.OPEN_BRACKET:
+        token = input.current()
+        input.ahead()
+
+        node = BlockNode(parent, token.pos)
+
+        # '}'
+        if input.hasCurrent() and input.current().type == TokenType.CLOSE_BRACKET:
+            input.ahead()
+            return node
+
+        # blockItem
+        if input.hasCurrent():
+            item = parseBlockItem(input, node)
+            node.append(item)
+            return node
+
+    return None
+
+
+# blockItem -> stmt | '}'
+def parseBlockItem(input, parent):
+    # '}'
+    if input.hasCurrent() and input.current().type == TokenType.CLOSE_BRACKET:
+        close = CloseBlockNode(parent, input.current().pos)
+        input.ahead()
+        return close
+
+    if input.hasCurrent():
+        stmt = parseStatement(input, parent)
+
+        if stmt is not None:
+            item = BlockItemNode(stmt, parent, stmt.pos)
+            stmt.parent = item
+            nextBlockItem = parseBlockItem(input, item)
+            if nextBlockItem != None:
+                item.append(nextBlockItem)
+            return item
+
+    return None