February 24, 2019 Alias this, templates and Algebraic - regression or expected behavior? | ||||
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This code: import std.variant; struct Vector(int T) { float[T] elements; } struct Color { Vector!4 vec; alias vec this; } Algebraic!(Color,Vector!4) foo; void main() { foo = Color(); } according to run.dlang.io: Up to 2.068.2: Success and no output 2.069.2: Failure with output: ----- /path/to/dmd/dmd2/linux/bin64/../../src/phobos/std/variant.d(578): Error: static assert "Cannot store a Color in a VariantN!(16LU, Color, Vector!4). Valid types are (Vector!4, Vector!4)" onlineapp.d(18): instantiated from here: opAssign!(Color) ----- 2.070.2: Failure with output: (same as above) 2.071.2: Failure with output: (same as above) 2.072.2: Failure with output: (same as above) 2.073.2: Failure with output: (same as above) 2.074.1 to 2.075.1: Failure with output: (same as above) 2.076.1 to 2.078.1: Failure with output: (same as above) 2.079.1 to 2.080.1: Failure with output: (same as above) 2.081.2 to 2.083.1: Failure with output: (same as above) Since 2.084.0: Failure with output: (same as above) Is this expected? Should this code work? |
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