compiler/rustc_target/src/json.rs

   1 use std::borrow::Cow;
   2 use std::collections::BTreeMap;
   3
   4 pub use serde_json::Value as Json;
   5 use serde_json::{Map, Number};
   6
   7 pub trait ToJson {
   8     fn to_json(&self) -> Json;
   9 }
  10
  11 impl ToJson for Json {
  12     fn to_json(&self) -> Json {
  13         self.clone()
  14     }
  15 }
  16
  17 macro_rules! to_json_impl_num {
  18     ($($t:ty), +) => (
  19         $(impl ToJson for $t {
  20             fn to_json(&self) -> Json {
  21                 Json::Number(Number::from(*self))
  22             }
  23         })+
  24     )
  25 }
  26
  27 to_json_impl_num! { isize, i8, i16, i32, i64, usize, u8, u16, u32, u64 }
  28
  29 impl ToJson for bool {
  30     fn to_json(&self) -> Json {
  31         Json::Bool(*self)
  32     }
  33 }
  34
  35 impl ToJson for str {
  36     fn to_json(&self) -> Json {
  37         Json::String(self.to_owned())
  38     }
  39 }
  40
  41 impl ToJson for String {
  42     fn to_json(&self) -> Json {
  43         Json::String(self.to_owned())
  44     }
  45 }
  46
  47 impl<'a> ToJson for Cow<'a, str> {
  48     fn to_json(&self) -> Json {
  49         Json::String(self.to_string())
  50     }
  51 }
  52
  53 impl<A: ToJson> ToJson for [A] {
  54     fn to_json(&self) -> Json {
  55         Json::Array(self.iter().map(|elt| elt.to_json()).collect())
  56     }
  57 }
  58
  59 impl<A: ToJson> ToJson for Vec<A> {
  60     fn to_json(&self) -> Json {
  61         Json::Array(self.iter().map(|elt| elt.to_json()).collect())
  62     }
  63 }
  64
  65 impl<'a, A: ToJson> ToJson for Cow<'a, [A]>
  66 where
  67     [A]: ToOwned,
  68 {
  69     fn to_json(&self) -> Json {
  70         Json::Array(self.iter().map(|elt| elt.to_json()).collect())
  71     }
  72 }
  73
  74 impl<T: ToString, A: ToJson> ToJson for BTreeMap<T, A> {
  75     fn to_json(&self) -> Json {
  76         let mut d = Map::new();
  77         for (key, value) in self {
  78             d.insert(key.to_string(), value.to_json());
  79         }
  80         Json::Object(d)
  81     }
  82 }
  83
  84 impl<A: ToJson> ToJson for Option<A> {
  85     fn to_json(&self) -> Json {
  86         match *self {
  87             None => Json::Null,
  88             Some(ref value) => value.to_json(),
  89         }
  90     }
  91 }