Function validate_trigger_internal 

pub fn validate_trigger_internal(
    caller: &Lowercase<'_>,
    ltype: ListType,
    block: &Block,
    data: &Everything,
    sc: &mut ScopeContext,
    vd: Validator<'_>,
    tooltipped: Tooltipped,
    negated: bool,
) -> bool

The interface to trigger validation when validate_trigger is too limited.

caller is the key that opened this trigger. It is used to determine which special cases apply. For example, if caller is trigger_if then a limit block is expected.

in_list specifies whether this trigger is directly in an any_ iterator. It is also used to determine which special cases apply.

negated is true iff this trigger is tested in a negative sense, for example if it is somewhere inside a NOT = { ... } block. negated is propagated to all sub-blocks and is flipped when another NOT or similar is encountered inside this one.

Returns true iff the trigger had side effects (such as saving scopes).