# Pastebin gQSxKzMR
    token infix:sym<?? !!> {
        $<sym>=['⁇' || '??']
        :my $*GOAL := ~$<sym> eq '??' ?? '!!' !! '‼';
        :my $*TERNARYBEGIN := ~$<sym>;
        <.ws>
        <EXPR('i=')>
        [ $*GOAL
        || <?before '::' <.-[=]>> { self.typed_panic: "X::Syntax::ConditionalOperator::SecondPartInvalid", second-part => "::" }
        || <?before ':' <.-[=\w]>> { self.typed_panic: "X::Syntax::ConditionalOperator::SecondPartInvalid", second-part => ":" }
        || <infixish> { self.typed_panic: "X::Syntax::ConditionalOperator::PrecedenceTooLoose", operator => ~$<infixish> }
        || <?{ ~$<EXPR> ~~ / $*GOAL / }> { self.typed_panic: "X::Syntax::ConditionalOperator::SecondPartGobbled" }
        || <?before \N*? [\n\N*?]? $*GOAL> { self.typed_panic: "X::Syntax::Confused", reason => "Confused: Bogus code found before the !! of conditional operator" }
        || { self.typed_panic: "X::Syntax::Confused", reason => "Confused: Found $*TERNARYBEGIN but no $*GOAL" }
        ]
        <O(|%conditional, :reducecheck<ternary>, :pasttype<if>)>
    }

    token infix_prefix_meta_operator:sym<!> {
        <sym> <![!]> {} [ <infixish('neg')> || <.panic: "Negation metaoperator not followed by valid infix"> ]
        [
        || <?{ $<infixish>.Str eq '=' }> <O(|%chaining)>
        || <.can_meta($<infixish>, "negate")> <?{ $<infixish><OPER><O>.made<iffy> }> <O=.AS_MATCH($<infixish><OPER><O>)>
        || { self.typed_panic: "X::Syntax::CannotMeta", meta => "negate", operator => ~$<infixish>, dba => ~$<infixish><OPER><O>.made<dba>, reason => "not iffy enough" }
        ]
    }