On 17/02/2013 16:10, deadalnix wrote:
I have several instance of cases like this :
switch(c) {
case 'U', 'u' :
case 'L', 'l' :
// code . . .
}
dmd from master complains about it (Error: switch case fallthrough - use 'goto
case;' if
intended). It used to work.
<snip>
Implicit fall through shouldn't have been allowed from the beginning. It would appear
that this has finally been banned.
However, according to the grammar, this is now illegal for a different reason:
http://dlang.org/statement.html#SwitchStatement
CaseStatement:
case ArgumentList : ScopeStatementList
ScopeStatementList:
StatementListNoCaseNoDefault
StatementListNoCaseNoDefault:
StatementNoCaseNoDefault
StatementNoCaseNoDefault StatementListNoCaseNoDefault
But it does seem odd to people coming from C(++), since it doesn't seem aimed at either
simplifying the grammar or shielding the programmer's foot against self-inflicted gunfire.
But it does address this issue, which I actually hadn't taken in had been
resolved
http://d.puremagic.com/issues/show_bug.cgi?id=603
If we want to still allow the old C syntax for multiple cases, then we can
define
CaseStatement:
case ArgumentList : ScopeStatementList
case ArgumentList : CaseStatement
which is only a small change....
Stewart.
