Bug 2082 – Cannot convert char[] to string

This is really ugly. The following program: void test(char[] s) { string t = s; } gives the following error: junk2.d(2): Error: cannot implicitly convert expression (s) of type char[] to invariant(char)[] I haven't found a way around this yet. It really should be handled as an implicit conversion, with a copy being made under the covers as needed.

Reply to [email protected], > http://d.puremagic.com/issues/show_bug.cgi?id=2082 > > Summary: Cannot convert char[] to string > Product: D > Version: 2.012 > Platform: PC > OS/Version: Linux > Status: NEW > Severity: normal > Priority: P2 > Component: DMD > AssignedTo: [email protected] > ReportedBy: [email protected] > This is really ugly. The following program: > > void test(char[] s) { > string t = s; > } > gives the following error: > > junk2.d(2): Error: cannot implicitly convert expression (s) of type > char[] to invariant(char)[] > > I haven't found a way around this yet. It really should be handled as > an implicit conversion, with a copy being made under the covers as > needed. > I think you need to use .idup

To me, this seems like it's going to clutter commonly occurring code. Since char[] and string are similar, and the language is generally trying to treat them like built-in types, I would hope this kind of conversion was transparent most of the time.

This is desired behaviour. Use idup() to make a new invariant copy or use a cast (via assumeUnique from std.contracts?) if you can guarantee the data is invariant.

*** Bug 2083 has been marked as a duplicate of this bug. ***