Add error message for static assert in bitmanip.d

crimaniak · wilzbach · commit f8fbd2976ddc · 2018-03-17T13:21:59.000+01:00
Static assert, checking the number of bits for a field with the type
bool, did not have an error message.
diff --git a/std/bitmanip.d b/std/bitmanip.d
@@ -107,7 +107,8 @@ private template createAccessors(
 
         static if (is(T == bool))
         {
-            static assert(len == 1);
+            static assert(len == 1, "`" ~ name ~
+                    "` definition problem: type `bool` is only allowed for single-bit fields");
             enum result =
             // getter
                 "@property bool " ~ name ~ "() @safe pure nothrow @nogc const { return "

Original file line number	Diff line number	Diff line change
`@@ -107,7 +107,8 @@ private template createAccessors(`
`107`	`107`
`108`	`108`	`static if (is(T == bool))`
`109`	`109`	`{`
`110`		`- static assert(len == 1);`
	`110`	+ static assert(len == 1, "`" ~ name ~
	`111`	+ "` definition problem: type `bool` is only allowed for single-bit fields");
`111`	`112`	`enum result =`
`112`	`113`	`// getter`
`113`	`114`	`"@property bool " ~ name ~ "() @safe pure nothrow @nogc const { return "`