Revision control
Copy as Markdown
Other Tools
#![allow(unused_macro_rules)]
macro_rules! json_str {
([]) => {
"[]"
};
([ $e0:tt $(, $e:tt)* $(,)? ]) => {
concat!("[",
json_str!($e0),
$(",", json_str!($e),)*
"]")
};
({}) => {
"{}"
};
({ $k0:tt : $v0:tt $(, $k:tt : $v:tt)* $(,)? }) => {
concat!("{",
stringify!($k0), ":", json_str!($v0),
$(",", stringify!($k), ":", json_str!($v),)*
"}")
};
(($other:tt)) => {
$other
};
($other:tt) => {
stringify!($other)
};
}
macro_rules! pretty_str {
($json:tt) => {
pretty_str_impl!("", $json)
};
}
macro_rules! pretty_str_impl {
($indent:expr, []) => {
"[]"
};
($indent:expr, [ $e0:tt $(, $e:tt)* $(,)? ]) => {
concat!("[\n ",
$indent, pretty_str_impl!(concat!(" ", $indent), $e0),
$(",\n ", $indent, pretty_str_impl!(concat!(" ", $indent), $e),)*
"\n", $indent, "]")
};
($indent:expr, {}) => {
"{}"
};
($indent:expr, { $k0:tt : $v0:tt $(, $k:tt : $v:tt)* $(,)? }) => {
concat!("{\n ",
$indent, stringify!($k0), ": ", pretty_str_impl!(concat!(" ", $indent), $v0),
$(",\n ", $indent, stringify!($k), ": ", pretty_str_impl!(concat!(" ", $indent), $v),)*
"\n", $indent, "}")
};
($indent:expr, ($other:tt)) => {
$other
};
($indent:expr, $other:tt) => {
stringify!($other)
};
}