Macro graphql_vars

macro_rules! graphql_vars {
    (@object $object:ident () () ()) => { ... };
    (@object $object:ident [$($key:tt)+] ($value:expr) , $($rest:tt)*) => { ... };
    (@object $object:ident [$($key:tt)+] ($value:expr) $unexpected:tt $($rest:tt)*) => { ... };
    (@object $object:ident [$($key:tt)+] ($value:expr)) => { ... };
    (@object $object:ident ($($key:tt)+) (: null $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: None $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: @$var:ident $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: [$($array:tt)*] $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: {$($map:tt)*} $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: $ident:ident , $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: $last:ident ) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: $value:expr , $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (: $value:expr) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) (:) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)+) () $copy:tt) => { ... };
    (@object $object:ident () (: $($rest:tt)*) ($colon:tt $($copy:tt)*)) => { ... };
    (@object $object:ident ($($key:tt)*) (, $($rest:tt)*) ($comma:tt $($copy:tt)*)) => { ... };
    (@object $object:ident () (($key:expr) : $($rest:tt)*) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)*) (: $($unexpected:tt)+) $copy:tt) => { ... };
    (@object $object:ident ($($key:tt)*) ($tt:tt $($rest:tt)*) $copy:tt) => { ... };
    (@unexpected) => { ... };
    () => { ... };
    ( $($map:tt)+ ) => { ... };
}

Constructs Variables via JSON-like syntax.

Variables key should implement Into<String>.

let code = 200;
let features = vec!["key", "value"];
let key: Cow<'static, str> = "key".into();

let value: Variables = graphql_vars! {
    "code": code,
    "success": code == 200,
    features[0]: features[1],
    key: @var,
};

See graphql_input_value! for more info on syntax of value after :.