http://d.puremagic.com/issues/show_bug.cgi?id=6793
Summary: std.exception.assumeUnique documentation
Product: D
Version: D2
Platform: Other
OS/Version: Other
Status: NEW
Severity: enhancement
Priority: P2
Component: websites
AssignedTo: nob...@puremagic.com
ReportedBy: bearophile_h...@eml.cc
--- Comment #0 from bearophile_h...@eml.cc 2011-10-08 13:31:55 PDT ---
In the site documentation of std.exception.assumeUnique there is code like:
string letters()
{
char[] result = new char['z' - 'a' + 1];
foreach (i, ref e; result)
{
e = 'a' + i;
}
return assumeUnique(result);
}
But recent improvements of the D language make assumeUnique useless in this
case, this compiles:
string lowercase() pure nothrow {
auto result = new char['z' - 'a' + 1];
foreach (i, ref c; result)
c = cast(char)('a' + i);
return result;
}
void main() {}
On the other hand currently (DMD 2.056head) 'a'+i can't be assigned to a char
because the compiler doesn't see that the variable 'i' will never become too
much big.
So in the documentation of std.exception.assumeUnique I suggest to explain that
some usages (where the function is pure) of assumeUnique are not needed now.
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