ff: Add PrimeField: From<u64> constraint

2025-07-31 20:41:22 +00:00 · 2020-03-27 23:19:58 +13:00
parent b6457a905b
commit fd79de5408
11 changed files with 50 additions and 37 deletions
--- a/ff/ff_derive/src/lib.rs
+++ b/ff/ff_derive/src/lib.rs
@@ -853,6 +853,15 @@ fn prime_field_impl(
            }
        }

+        impl From<u64> for #name {
+            #[inline(always)]
+            fn from(val: u64) -> #name {
+                let mut raw = [0u64; #limbs];
+                raw[0] = val;
+                #name(#repr(raw)) * #name(R2)
+            }
+        }
+
        impl From<#name> for #repr {
            fn from(e: #name) -> #repr {
                e.into_repr()