1 files changed, 180 insertions, 0 deletions
diff --git a/third_party/rust/serde_yaml/src/value/from.rs b/third_party/rust/serde_yaml/src/value/from.rs
new file mode 100644
index 0000000000..c02855d3b1
--- /dev/null
+++ b/third_party/rust/serde_yaml/src/value/from.rs
@@ -0,0 +1,180 @@
+use crate::{Mapping, Value};
+
+// Implement a bunch of conversion to make it easier to create YAML values
+// on the fly.
+
+macro_rules! from_number {
+    ($($ty:ident)*) => {
+        $(
+            impl From<$ty> for Value {
+                fn from(n: $ty) -> Self {
+                    Value::Number(n.into())
+                }
+            }
+        )*
+    };
+}
+
+from_number! {
+    i8 i16 i32 i64 isize
+    u8 u16 u32 u64 usize
+    f32 f64
+}
+
+impl From<bool> for Value {
+    /// Convert boolean to `Value`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    ///
+    /// let b = false;
+    /// let x: Value = b.into();
+    /// ```
+    fn from(f: bool) -> Self {
+        Value::Bool(f)
+    }
+}
+
+impl From<String> for Value {
+    /// Convert `String` to `Value`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    ///
+    /// let s: String = "lorem".to_string();
+    /// let x: Value = s.into();
+    /// ```
+    fn from(f: String) -> Self {
+        Value::String(f)
+    }
+}
+
+impl<'a> From<&'a str> for Value {
+    /// Convert string slice to `Value`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    ///
+    /// let s: &str = "lorem";
+    /// let x: Value = s.into();
+    /// ```
+    fn from(f: &str) -> Self {
+        Value::String(f.to_string())
+    }
+}
+
+use std::borrow::Cow;
+
+impl<'a> From<Cow<'a, str>> for Value {
+    /// Convert copy-on-write string to `Value`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    /// use std::borrow::Cow;
+    ///
+    /// let s: Cow<str> = Cow::Borrowed("lorem");
+    /// let x: Value = s.into();
+    /// ```
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    /// use std::borrow::Cow;
+    ///
+    /// let s: Cow<str> = Cow::Owned("lorem".to_string());
+    /// let x: Value = s.into();
+    /// ```
+    fn from(f: Cow<'a, str>) -> Self {
+        Value::String(f.to_string())
+    }
+}
+
+impl From<Mapping> for Value {
+    /// Convert map (with string keys) to `Value`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::{Mapping, Value};
+    ///
+    /// let mut m = Mapping::new();
+    /// m.insert("Lorem".into(), "ipsum".into());
+    /// let x: Value = m.into();
+    /// ```
+    fn from(f: Mapping) -> Self {
+        Value::Mapping(f)
+    }
+}
+
+impl<T: Into<Value>> From<Vec<T>> for Value {
+    /// Convert a `Vec` to `Value`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    ///
+    /// let v = vec!["lorem", "ipsum", "dolor"];
+    /// let x: Value = v.into();
+    /// ```
+    fn from(f: Vec<T>) -> Self {
+        Value::Sequence(f.into_iter().map(Into::into).collect())
+    }
+}
+
+impl<'a, T: Clone + Into<Value>> From<&'a [T]> for Value {
+    /// Convert a slice to `Value`
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    ///
+    /// let v: &[&str] = &["lorem", "ipsum", "dolor"];
+    /// let x: Value = v.into();
+    /// ```
+    fn from(f: &'a [T]) -> Self {
+        Value::Sequence(f.iter().cloned().map(Into::into).collect())
+    }
+}
+
+use std::iter::FromIterator;
+
+impl<T: Into<Value>> FromIterator<T> for Value {
+    /// Convert an iteratable type to a YAML sequence
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    ///
+    /// let v = std::iter::repeat(42).take(5);
+    /// let x: Value = v.collect();
+    /// ```
+    ///
+    /// ```
+    /// use serde_yaml::Value;
+    ///
+    /// let v: Vec<_> = vec!["lorem", "ipsum", "dolor"];
+    /// let x: Value = v.into_iter().collect();
+    /// ```
+    ///
+    /// ```
+    /// use std::iter::FromIterator;
+    /// use serde_yaml::Value;
+    ///
+    /// let x: Value = Value::from_iter(vec!["lorem", "ipsum", "dolor"]);
+    /// ```
+    fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> Self {
+        let vec = iter.into_iter().map(T::into).collect();
+
+        Value::Sequence(vec)
+    }
+}