vendor/serde_json/tests/macros/mod.rs

   1 macro_rules! json_str {
   2     ([]) => {
   3         "[]"
   4     };
   5     ([ $e0:tt $(, $e:tt)* $(,)? ]) => {
   6         concat!("[",
   7             json_str!($e0),
   8             $(",", json_str!($e),)*
   9         "]")
  10     };
  11     ({}) => {
  12         "{}"
  13     };
  14     ({ $k0:tt : $v0:tt $(, $k:tt : $v:tt)* $(,)? }) => {
  15         concat!("{",
  16             stringify!($k0), ":", json_str!($v0),
  17             $(",", stringify!($k), ":", json_str!($v),)*
  18         "}")
  19     };
  20     (($other:tt)) => {
  21         $other
  22     };
  23     ($other:tt) => {
  24         stringify!($other)
  25     };
  26 }
  27
  28 macro_rules! pretty_str {
  29     ($json:tt) => {
  30         pretty_str_impl!("", $json)
  31     };
  32 }
  33
  34 macro_rules! pretty_str_impl {
  35     ($indent:expr, []) => {
  36         "[]"
  37     };
  38     ($indent:expr, [ $e0:tt $(, $e:tt)* $(,)? ]) => {
  39         concat!("[\n  ",
  40             $indent, pretty_str_impl!(concat!("  ", $indent), $e0),
  41             $(",\n  ", $indent, pretty_str_impl!(concat!("  ", $indent), $e),)*
  42         "\n", $indent, "]")
  43     };
  44     ($indent:expr, {}) => {
  45         "{}"
  46     };
  47     ($indent:expr, { $k0:tt : $v0:tt $(, $k:tt : $v:tt)* $(,)? }) => {
  48         concat!("{\n  ",
  49             $indent, stringify!($k0), ": ", pretty_str_impl!(concat!("  ", $indent), $v0),
  50             $(",\n  ", $indent, stringify!($k), ": ", pretty_str_impl!(concat!("  ", $indent), $v),)*
  51         "\n", $indent, "}")
  52     };
  53     ($indent:expr, ($other:tt)) => {
  54         $other
  55     };
  56     ($indent:expr, $other:tt) => {
  57         stringify!($other)
  58     };
  59 }