Bug 4241 – duplicate union initialization error doesn't give a file location

import std.typetuple; /// repeat a type count times template Repeat(T, int count) { static if (!count) alias TypeTuple!() Repeat; else alias TypeTuple!(T, Repeat!(T, count-1)) Repeat; } struct Vector(T, int dim) { static assert (dim >= 2 && dim <= 4); union { // including these gives more errors of the same kind // T[dim] cell; /// array access // Repeat!(T, dim) tuple; /// for tuple access /// normal struct element access struct { static if (dim >= 1) union { T x; T r; } static if (dim >= 2) union { T y; T g; } static if (dim >= 3) union { T z; T b; } static if (dim >= 4) union { T w; T a; } } } // these constructors are workarounds for the "overlapping initialization for _tuple_field_0" problem static if (dim == 2) this(T ax, T ay) { x = ax; y = ay; } static if (dim == 3) this(T ax, T ay, T az) { x = ax; y = ay; z = az; } static if (dim == 4) this(T ax, T ay, T az, T aw) { x = ax; y = ay; z = az; w = aw; } static if (2 == dim) const static Vector zero = Vector(0, 0); static if (3 == dim) const static Vector zero = Vector(0, 0, 0); static if (4 == dim) const static Vector zero = Vector(0, 0, 0, 0); } alias Vector!(float, 2) Vector2f; /// alias Vector!(float, 3) Vector3f; /// alias Vector!(float, 4) Vector4f; /// yields: Error: duplicate union initialization for r Error: duplicate union initialization for g Error: duplicate union initialization for r Error: duplicate union initialization for g Error: duplicate union initialization for b Error: duplicate union initialization for r Error: duplicate union initialization for g Error: duplicate union initialization for b Error: duplicate union initialization for a It would be helpful to have a file location. Unfortunately for some reason loc is null in StructLiteralExp::toDt(dt_t **pdt) where the error occurs.

Reduced test case: import std.typetuple; struct bar( int n, T ) { static immutable bar b = bar( 0 ); Tuple!( int ) fields; this( int arg ) { fields.field[0] = arg; } } alias bar!( 3, int ) b;

Commit pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/b9d64aa07448a43dda3f28d3bffc8059ec869e06 Merge pull request #677 from yebblies/issue4241 Issue 4241 - duplicate union initialization error doesn't give a file location

Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/a933ce10cc15d2eb6b54a7d00b6f416d1ada6097 fix Issue 4241 - duplicate union initialization error doesn't give a file location