std: use PR enum as only location of opcode numbers
std: use PR enum as only location of opcode numbers

raulgrell/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,andrewrk/zig,zig-lang/zig,zig-lang/zig,zig-lang/zig,andrewrk/zig,raulgrell/zig