matcher.py 文件源码

def match_rules_context_multi(tree, rules, parent_context={}):
    """Recursively matches a Tree structure with rules and returns context

    Args:
        tree (Tree): Parsed tree structure
        rules (dict): See match_rules
        parent_context (dict): Context of parent call
    Returns:
        dict: Context matched dictionary of matched rules or
        None if no match
    """
    all_contexts = []
    for template, match_rules in rules.items():
        context = parent_context.copy()
        if match_template(tree, template, context):
            child_contextss = []
            if not match_rules:
                all_contexts += [context]
            else:
                for key, child_rules in match_rules.items():
                    child_contextss.append(match_rules_context_multi(context[key], child_rules, context))
                all_contexts += cross_context(child_contextss)    
    return all_contexts