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Language-independent Queries: ast_languages - ast_node_signature - ast_node_term/3Args - ast_node_term/2Args - ast_node_template_for_id- ast_argname_id - ast_relation_signature - ast_argname_parent - expression - ast_node_for_id - ast_node_type_value - ast_node_attributes - tree_attributes - ast_edge_value - ast_parent - ast_parent - ast_parent_value_or_null - ast_ancestor - ast_node_sub_trees - ast_unreferenced_sub_trees

Known Languages | AST Nodes and AST Relations of a Language | AST Access and Navigation

ast_parent_value_or_null(Id,Parent) is det

  • Like ast_parent/2 but returns the atom 'null' if arg1 has no parent (instead of failing).
  • Only fails if Id does not exist or is not a child of Parent.
Last modified: 2013/05/21 13:18
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