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Switch to new proc-macro crate for implementing traits for tuples (#3598)

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* Switch to new proc-macro crate for implementing traits for tuples

* Switch back to stable `Cargo.lock` format

* Reduce tuple number to match rusts default implementation
This commit is contained in:
Bastian Köcher
2019-09-11 19:10:02 +02:00
committed by GitHub
parent 433d752831
commit d136b8eb81
16 changed files with 139 additions and 306 deletions
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substrate/srml/support/src/lib.rs
-15
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@@ -266,21 +266,6 @@ pub enum Void {}
#[doc(hidden)]
pub use serde::{Serialize, Deserialize};
/// Programatically create derivations for tuples of up to 19 elements. You provide a second macro
/// which is called once per tuple size, along with a number of identifiers, one for each element
/// of the tuple.
#[macro_export]
macro_rules! for_each_tuple {
($m:ident) => {
for_each_tuple! { @IMPL $m !! A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, }
};
(@IMPL $m:ident !!) => { $m! { } };
(@IMPL $m:ident !! $h:ident, $($t:ident,)*) => {
$m! { $h $($t)* }
for_each_tuple! { @IMPL $m !! $($t,)* }
}
}
#[cfg(test)]
mod tests {
use super::*;