Feb 15th 2023 update

external/graphqlparser/python/example.py

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+# Copyright 2019-present, GraphQL Foundation
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+from ctypes import *
+from GraphQLParser import *
+
+def print_field(field, unused):
+  field_name = GraphQLAstField_get_name(field)
+  field_name_value = GraphQLAstName_get_value(field_name)
+  print 'field : ' + field_name_value
+  return 0
+
+def main():
+  error = POINTER(c_char)()
+  ast = graphql_parse_string('query myquery { myfield }', byref(error))
+  field_visitor_callbacks = GraphQLAstVisitorCallbacks(visit_field = visit_field_func(print_field))
+  graphql_node_visit(ast, pointer(field_visitor_callbacks), None)
+
+  graphql_node_free(ast)
+
+  ast = graphql_parse_string('query errorQuery on oops { myfield }', byref(error))
+  print 'Example error:', string_at(error)
+  graphql_error_free(error)
+  if ast:
+    print 'BUG: we should have got a null AST back, but we got:', ast
+
+if __name__ == '__main__':
+  main()