Re: How can I tell if the give parameter can be run at compile time?

On Mon, Mar 01, 2021 at 08:05:57PM +, Jack via Digitalmars-d-learn wrote: > bool g(T)(T) > { > return __traits(compiles, mixin("{ enum a = t; }")); > } > > > int a; > enum s = ""; > // both return false but g(s) is expected to return true > pragma(msg, g(s)); > pragma(msg, g(a));

Re: How can I tell if the give parameter can be run at compile time?

On Monday, 1 March 2021 at 20:05:57 UTC, Jack wrote: int a; enum s = ""; // both return false but g(s) is expected to return true So the value must be known at compile time without any extra context. So that `a` variable might be changed somewhere else so compile time can't read or write it.

How can I tell if the give parameter can be run at compile time?

bool g(T)(T) { return __traits(compiles, mixin("{ enum a = t; }")); } int a; enum s = ""; // both return false but g(s) is expected to return true pragma(msg, g(s)); pragma(msg, g(a));