Parse None in the old parser

Laiba-Akram · May 17, 2022 · 68e9f58 · 68e9f58
1 parent f0e48f0
commit 68e9f58
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diff --git a/grammar/Python.asdl b/grammar/Python.asdl
@@ -84,6 +84,7 @@ module LPython
          | ConstantFloat(float value, string? kind)
          | ConstantComplex(float re, float im, string? kind)
          | ConstantEllipsis(string? kind)
+         | ConstantNone(string? kind)
 
          -- the following expression can appear in assignment context
          | Attribute(expr value, identifier attr, expr_context ctx)

diff --git a/src/runtime/lpython_parser.py b/src/runtime/lpython_parser.py
@@ -52,6 +52,8 @@ def visit_Constant(self, node):
                         node.value.imag, node.kind)
         elif isinstance(node.value, Ellipsis.__class__):
             new_node = python_ast.ConstantEllipsis(node.kind)
+        elif isinstance(node.value, None.__class__):
+            new_node = python_ast.ConstantNone(node.kind)
         else:
             print(type(node.value))
             raise Exception("Unsupported Constant type")