Method type_checker

mypy/build.py:3417–3430

(self)

        self.time_spent_us += time_spent_us(t0)

    def type_checker(self) -> TypeChecker:
        if not self._type_checker:
            assert self.tree is not None, "Internal error: must be called on parsed file only"
            manager = self.manager
            self._type_checker = TypeChecker(
                manager.errors,
                manager.modules,
                self.options,
                self.tree,
                self.xpath,
                manager.plugin,
                self.per_line_checking_time_ns,
            )
        return self._type_checker

    def type_map(self) -> dict[Expression, Type]:
        # We can extract the master type map directly since at this