diff options
Diffstat (limited to '')
-rw-r--r-- | vendor/serde/src/integer128.rs | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/vendor/serde/src/integer128.rs b/vendor/serde/src/integer128.rs new file mode 100644 index 000000000..904c2a233 --- /dev/null +++ b/vendor/serde/src/integer128.rs @@ -0,0 +1,82 @@ +/// Conditional compilation depending on whether Serde is built with support for +/// 128-bit integers. +/// +/// Data formats that wish to support Rust compiler versions older than 1.26 +/// (or targets that lack 128-bit integers) may place the i128 / u128 methods +/// of their Serializer and Deserializer behind this macro. +/// +/// Data formats that require a minimum Rust compiler version of at least 1.26, +/// or do not target platforms that lack 128-bit integers, do not need to +/// bother with this macro and may assume support for 128-bit integers. +/// +/// ```edition2018 +/// # use serde::__private::doc::Error; +/// # +/// # struct MySerializer; +/// # +/// use serde::{serde_if_integer128, Serializer}; +/// +/// impl Serializer for MySerializer { +/// type Ok = (); +/// type Error = Error; +/// +/// fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> { +/// /* ... */ +/// # unimplemented!() +/// } +/// +/// /* ... */ +/// +/// serde_if_integer128! { +/// fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error> { +/// /* ... */ +/// # unimplemented!() +/// } +/// +/// fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error> { +/// /* ... */ +/// # unimplemented!() +/// } +/// } +/// # +/// # serde::__serialize_unimplemented! { +/// # bool i8 i16 i32 u8 u16 u32 u64 f32 f64 char str bytes none some +/// # unit unit_struct unit_variant newtype_struct newtype_variant seq +/// # tuple tuple_struct tuple_variant map struct struct_variant +/// # } +/// } +/// ``` +/// +/// When Serde is built with support for 128-bit integers, this macro expands +/// transparently into just the input tokens. +/// +/// ```edition2018 +/// macro_rules! serde_if_integer128 { +/// ($($tt:tt)*) => { +/// $($tt)* +/// }; +/// } +/// ``` +/// +/// When built without support for 128-bit integers, this macro expands to +/// nothing. +/// +/// ```edition2018 +/// macro_rules! serde_if_integer128 { +/// ($($tt:tt)*) => {}; +/// } +/// ``` +#[cfg(not(no_integer128))] +#[macro_export] +macro_rules! serde_if_integer128 { + ($($tt:tt)*) => { + $($tt)* + }; +} + +#[cfg(no_integer128)] +#[macro_export] +#[doc(hidden)] +macro_rules! serde_if_integer128 { + ($($tt:tt)*) => {}; +} |