Fix Issue 21916 - Error message is obfuscated when using wrong format…

[CyberShadow]

… specifier at compile-time

Before:

.../std/format/package.d(748): Error: expression `FormatException(['I', 'n', 'c', 'o', 'r', 'r', 'e', 'c', 't', ' ', 'f', 'o', 'r', 'm', 'a', 't', ' ', 's', 'p', 'e', 'c', 'i', 'f', 'i', 'e', 'r', ' ', 'f', 'o', 'r', ' ', 'r', 'a', 'n', 'g', 'e', ':', ' ', '%', 'f'], ".../std/format/internal/write.d", 1722LU, null, null, 0u)` is not constant
.../std/format/package.d(1370):        while evaluating: `static assert(!e)`
test.d(5): Error: template instance `std.format.format!("%f", int[])` error instantiating

After:

.../std/format/package.d(1370): Error: static assert:  "Incorrect format specifier for range: %f"
test.d(5):        instantiated from here: `format!("%f", int[])`

No test because (AFAIK) we can't test static assert error messages in Phobos.

[dlang-bot]

Thanks for your pull request, @CyberShadow!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	21916	minor	Error message is obfuscated when using wrong format specifier at compile-time

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + phobos#8070"

[berni44]

This also fixed issue 21774. :-)