summaryrefslogtreecommitdiffstats
path: root/compiler/rustc_target/src/json.rs
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--compiler/rustc_target/src/json.rs91
1 files changed, 91 insertions, 0 deletions
diff --git a/compiler/rustc_target/src/json.rs b/compiler/rustc_target/src/json.rs
new file mode 100644
index 000000000..b5d926352
--- /dev/null
+++ b/compiler/rustc_target/src/json.rs
@@ -0,0 +1,91 @@
+use std::borrow::Cow;
+use std::collections::BTreeMap;
+
+pub use serde_json::Value as Json;
+use serde_json::{Map, Number};
+
+pub trait ToJson {
+ fn to_json(&self) -> Json;
+}
+
+impl ToJson for Json {
+ fn to_json(&self) -> Json {
+ self.clone()
+ }
+}
+
+macro_rules! to_json_impl_num {
+ ($($t:ty), +) => (
+ $(impl ToJson for $t {
+ fn to_json(&self) -> Json {
+ Json::Number(Number::from(*self))
+ }
+ })+
+ )
+}
+
+to_json_impl_num! { isize, i8, i16, i32, i64, usize, u8, u16, u32, u64 }
+
+impl ToJson for bool {
+ fn to_json(&self) -> Json {
+ Json::Bool(*self)
+ }
+}
+
+impl ToJson for str {
+ fn to_json(&self) -> Json {
+ Json::String(self.to_owned())
+ }
+}
+
+impl ToJson for String {
+ fn to_json(&self) -> Json {
+ Json::String(self.to_owned())
+ }
+}
+
+impl<'a> ToJson for Cow<'a, str> {
+ fn to_json(&self) -> Json {
+ Json::String(self.to_string())
+ }
+}
+
+impl<A: ToJson> ToJson for [A] {
+ fn to_json(&self) -> Json {
+ Json::Array(self.iter().map(|elt| elt.to_json()).collect())
+ }
+}
+
+impl<A: ToJson> ToJson for Vec<A> {
+ fn to_json(&self) -> Json {
+ Json::Array(self.iter().map(|elt| elt.to_json()).collect())
+ }
+}
+
+impl<'a, A: ToJson> ToJson for Cow<'a, [A]>
+where
+ [A]: ToOwned,
+{
+ fn to_json(&self) -> Json {
+ Json::Array(self.iter().map(|elt| elt.to_json()).collect())
+ }
+}
+
+impl<T: ToString, A: ToJson> ToJson for BTreeMap<T, A> {
+ fn to_json(&self) -> Json {
+ let mut d = Map::new();
+ for (key, value) in self {
+ d.insert(key.to_string(), value.to_json());
+ }
+ Json::Object(d)
+ }
+}
+
+impl<A: ToJson> ToJson for Option<A> {
+ fn to_json(&self) -> Json {
+ match *self {
+ None => Json::Null,
+ Some(ref value) => value.to_json(),
+ }
+ }
+}