1330 – Array slicing does not work the same way in CTFE as at runtime

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Issue 1330 - Array slicing does not work the same way in CTFE as at runtime

Summary: Array slicing does not work the same way in CTFE as at runtime

Status:	RESOLVED FIXED
Alias:	None
Product:	D
Classification:	Unclassified
Component:	dmd (show other issues)
Version:	D1 (retired)
Hardware:	x86 Windows
Importance :	P2 critical
Assignee:	No Owner
URL:
Keywords:	wrong-code
Duplicates (3):	3456 4057 5907 (view as issue list)
Depends on:
Blocks:	4050 4051
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See Also:
Reported:	2007年07月10日 21:34 UTC by Jarrett Billingsley
Modified:	2014年02月16日 15:24 UTC (History)
CC List:	4 users (show)

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Description Jarrett Billingsley 2007年07月10日 21:34:50 UTC

Example:
char[] Something(char[] blah)
{
	char[] slice = blah[0 .. 1];
	slice[0] = 'h';
	return blah;
}
void main()
{
	pragma(msg, Something("foo".dup));
	writefln("%s", Something("foo".dup));
}
When compiled, this displays "foo"; when run, "hoo". Notice that slicing the input array and then modifying the slice is supposed to modify the original array, but it doesn't in CTFE because Slice() in the frontend always creates a copy of the data.

Comment 1 Don 2009年12月29日 00:12:38 UTC

*** Issue 3456 has been marked as a duplicate of this issue. ***

Comment 2 Don 2010年04月03日 11:20:23 UTC

*** Issue 4057 has been marked as a duplicate of this issue. ***

Comment 3 Don 2011年04月08日 21:16:15 UTC

Fixed.
D1:
https://github.com/D-Programming-Language/dmd/commit/ef2a0f1da10331c4de102ca3e029ea1c1c1a46bf
D2:
https://github.com/D-Programming-Language/dmd/commit/0219a5f0dcc88076759a4c472582954d0fb804b0

Comment 4 Don 2011年05月06日 01:48:15 UTC

*** Issue 5907 has been marked as a duplicate of this issue. ***