Bug 10841 – std.conv.parse failed when parsing a slice string

The test code is here: //============= string s1 = "11AB"; auto r = parse!int(s1[0..2], 16); //============= It worked with DMD 2.062, but failed with DMD 2.063.2.

If it worked with 2.062, it was a bug. parse accepts its argument by ref (because it alters the argument by popping characters off of it as they're parsed), which means that the argument must be an lvalue, and a slice is not an lvalue.

The rationale of the change is in the changelog: http://dlang.org/changelog.html#sliceref As a workaround you'll have to assign s1[0..2] to another variable and pass it to parse. A better alternative is to use to!() instead of parse!(): string s1 = "11AB"; auto r = to!int(s1[0..2], 16); There /was/ some brief discussion about making parse work with slices as well, since it could be considered convenient (and would avoid code breakage), but there was no outcome for the 2.063 release.