Eduardo Cavazos wrote:
Hello,
I was surprised that these seem to not be allowed in D:
void main ()
{
auto a = 20 ;
{
auto a = 30 ;
}
}
Correct.
http://www.digitalmars.com/d/1.0/statement.html#ScopeStatement
"Even though a new scope is introduced, local symbol declarations cannot
shadow (hide) other local symbol declarations in the same function."
void main ()
{
{ int f0 () { return 10 ; } }
{ int f0 () { return 20 ; } }
}
Looks like a bug.
Perhaps I missed something in the FAQ.
Is there anywhere (manual or TDPL) I can read up on this language design
decision? What other contemporary (or classic) languages feature this
behaviour? Scheme and C both allow the above.
It seems like this would be something that might be nice for certain
shops to enforce via a compiler switch, but not on by default.
What use case have you for this feature?
Many things are legal in C(++), but nearly always mistakes and so
compilers may generate warnings about them. This is another example.
Generally, the route D has taken has been to make them illegal. IINM,
there are always workarounds for those cases where it really is what you
meant.
Stewart.
