Re: [PATCH v2 06/13] verification/rvgen: Convert __fill_verify_guards_func() to Lark

[Gabriele Monaco <gmonaco@redhat.com>]

On Thu, 2026-05-28 at 10:27 +0200, Nam Cao wrote:
> Prepare to remove self.guards and self.__parse_constraints(), convert
> __fill_verify_guards_func() to use the parsed transitions from Lark.
> 
> Signed-off-by: Nam Cao <namcao@linutronix.de>
> ---

Reviewed-by: Gabriele Monaco <gmonaco@redhat.com>

> v2:
>   - fix up the ';' separator [Gabriele]
>   - make return type consistent with the function's signature
> [Wander]
>   - fix up __parse_guard_rule()'s signature
> ---
>  tools/verification/rvgen/rvgen/dot2k.py | 38 +++++++++++++++++++----
> --
>  1 file changed, 30 insertions(+), 8 deletions(-)
> 
> diff --git a/tools/verification/rvgen/rvgen/dot2k.py
> b/tools/verification/rvgen/rvgen/dot2k.py
> index d9f8e1c7737a..ebaa6c9135c2 100644
> --- a/tools/verification/rvgen/rvgen/dot2k.py
> +++ b/tools/verification/rvgen/rvgen/dot2k.py
> @@ -221,6 +221,19 @@ class ha2k(dot2k):
>      def __parse_single_constraint(self, rule: dict, value: str) ->
> str:
>          return f"ha_get_env(ha_mon, {rule["env"]}{self.enum_suffix},
> time_ns) {rule["op"]} {value}"
>  
> +    def __parse_guard_rule(self, rule) -> list[str]:
> +        buff = []
> +        for c, sep in rule.rules:
> +            env = c.env + self.enum_suffix
> +            op = c.op
> +            val = self.__adjust_value(c.val, c.unit)
> +
> +            cond = f"ha_get_env(ha_mon, {env}, time_ns) {op} {val}"
> +            if sep:
> +                cond += f" {sep}"
> +            buff.append(cond)
> +        return buff
> +
>      def __get_constraint_env(self, constr: str) -> str:
>          """Extract the second argument from an ha_ function"""
>          env =
> constr.split("(")[1].split()[1].rstrip(")").rstrip(",")
> @@ -287,7 +300,7 @@ class ha2k(dot2k):
>          rules = invalid_checks + rules
>  
>          separator = "\n\t\t      " if sum(len(r) for r in rules) >
> 80 else " "
> -        return ["res = " + separator.join(rules)]
> +        return ["res = " + separator.join(rules) + ";"]
>  
>      def __validate_constraint(self, key: tuple[int, int] | int,
> constr: str,
>                                rule, reset) -> None:
> @@ -406,7 +419,8 @@ f"""static inline void
> ha_convert_inv_guard(struct ha_monitor *ha_mon,
>  
>      def __fill_verify_guards_func(self) -> list[str]:
>          buff = []
> -        if not self.guards:
> +
> +        if not self.has_guard:
>              return []
>  
>          buff.append(
> @@ -418,14 +432,22 @@ f"""static inline bool ha_verify_guards(struct
> ha_monitor *ha_mon,
>  """)
>  
>          _else = ""
> -        for edge, constr in sorted(self.guards.items()):
> +        for transition in self.transitions:
> +            if not transition.rule and not transition.reset:
> +                continue
> +
>              buff.append(f"\t{_else}if (curr_state == "
> -                        f"{self.states[edge[0]]}{self.enum_suffix}
> && "
> -                        f"event ==
> {self.events[edge[1]]}{self.enum_suffix})")
> -            if constr.count(";") > 0:
> +                        f"{transition.src}{self.enum_suffix} && "
> +                        f"event ==
> {transition.event}{self.enum_suffix})")
> +            rule = transition.rule
> +            reset = transition.reset
> +            if rule and reset:
>                  buff[-1] += " {"
> -            buff += [f"\t\t{c};" for c in constr.split(";")]
> -            if constr.count(";") > 0:
> +            if rule:
> +                buff.append("\t\t" +
> self.__format_guard_rules(self.__parse_guard_rule(rule))[0])
> +            if reset:
> +                buff.append(f"\t\tha_reset_env(ha_mon,
> {reset.env}{self.enum_suffix}, time_ns);")
> +            if rule and reset:
>                  _else = "} else "
>              else:
>                  _else = "else "