mirror of
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efa4c9f9bb
warning: 1st rule of macro `json_str` is never used
--> tests/macros/mod.rs:2:5
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2 | ([]) => {
| ^^^^
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= note: `#[warn(unused_macro_rules)]` on by default
warning: 3rd rule of macro `json_str` is never used
--> tests/macros/mod.rs:11:5
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11 | ({}) => {
| ^^^^
62 lines
1.5 KiB
Rust
62 lines
1.5 KiB
Rust
#![allow(unused_macro_rules)]
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macro_rules! json_str {
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([]) => {
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"[]"
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};
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([ $e0:tt $(, $e:tt)* $(,)? ]) => {
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concat!("[",
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json_str!($e0),
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$(",", json_str!($e),)*
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"]")
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};
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({}) => {
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"{}"
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};
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({ $k0:tt : $v0:tt $(, $k:tt : $v:tt)* $(,)? }) => {
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concat!("{",
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stringify!($k0), ":", json_str!($v0),
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$(",", stringify!($k), ":", json_str!($v),)*
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"}")
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};
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(($other:tt)) => {
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$other
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};
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($other:tt) => {
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stringify!($other)
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};
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}
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macro_rules! pretty_str {
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($json:tt) => {
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pretty_str_impl!("", $json)
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};
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}
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macro_rules! pretty_str_impl {
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($indent:expr, []) => {
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"[]"
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};
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($indent:expr, [ $e0:tt $(, $e:tt)* $(,)? ]) => {
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concat!("[\n ",
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$indent, pretty_str_impl!(concat!(" ", $indent), $e0),
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$(",\n ", $indent, pretty_str_impl!(concat!(" ", $indent), $e),)*
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"\n", $indent, "]")
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};
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($indent:expr, {}) => {
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"{}"
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};
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($indent:expr, { $k0:tt : $v0:tt $(, $k:tt : $v:tt)* $(,)? }) => {
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concat!("{\n ",
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$indent, stringify!($k0), ": ", pretty_str_impl!(concat!(" ", $indent), $v0),
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$(",\n ", $indent, stringify!($k), ": ", pretty_str_impl!(concat!(" ", $indent), $v),)*
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"\n", $indent, "}")
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};
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($indent:expr, ($other:tt)) => {
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$other
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};
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($indent:expr, $other:tt) => {
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stringify!($other)
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};
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}
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