Bug 4874 – std.numeric.dotProduct doesn't work with bigints

With dmd 2.049beta this code compiles (but first see bug 4872 too): // program #1 import std.bigint; T dotProduct2(T)(/*in*/ T[] a1, /*in*/ T[] a2) { assert(a1.length == a2.length); T total = 0; foreach (i; 0 .. a1.length) total += a1[i] * a2[i]; return total; } void main() { BigInt[] a1 = [BigInt(1), BigInt(3), BigInt(-5)]; BigInt[] a2 = [BigInt(4), BigInt(-2), BigInt(-1)]; BigInt r = dotProduct2(a1, a2); } But the std.numeric.dotProduct() can't be used with bigints: // program #2 import std.numeric, std.bigint; void main() { BigInt[] a1 = [BigInt(1), BigInt(3), BigInt(-5)]; BigInt[] a2 = [BigInt(4), BigInt(-2), BigInt(-1)]; assert(dotProduct(a1, a2) == BigInt(3)); } If in program #1 arguments are "in" it doesn't compile.

That's the same issue as 4301. BigInt isn't yet const-correct.

Assigning to Don.

This is fixed in pull 1679: https://github.com/D-Programming-Language/phobos/pull/1679

Fixed: https://github.com/D-Programming-Language/phobos/compare/cc52695e4a15...9a93d82e9924