langkit-query-language/utils/refactoring/replace_or_patterns.py

import refactor
import liblkqllang as lkql
from refactor import Action, ActionKind


class App(refactor.Refactor):

    def preprocess(self, unit):
        for or_pat in unit.root.findall(lkql.OrPattern):
            # Replace 'or' by '|'
            or_tok = refactor.first_with_pred(
                or_pat.f_left.token_end, lambda t: t.kind == "Or"
            )
            # Put parens around the OrPattern if needed
            if not or_pat.parent.is_a(
                lkql.OrPattern,
                lkql.ParenPattern,
                lkql.NodePatternSelector,
                lkql.NodePatternField,
                lkql.NodePatternProperty,
            ):
                self.add_action(or_pat.token_start, Action(ActionKind.prepend, "("))
                self.add_action(or_pat.token_end, Action(ActionKind.append, ")"))
            self.add_action(or_tok, Action(ActionKind.replace, "|"))


if __name__ == "__main__":
    App.run()