gjditchfield@watmsg.waterloo.edu (Glen Ditchfield) (12/20/88)
"operator->" must be a no-argument member function, but G++ 1.31 (and 1.25)
seems to think it must have arguments. (Frankly, I was expecting a "Sorry,
not implemented" message.)
All this on a vax running BSD 4.3, with tm.h and md linked to tm-vax.h and
vax.md. The two patches posted on monday the 19th haven't been applied.
This code is based on the example in "The Evolution of C++: 1985 to 1987".
-------- opptr.cc -------------------------------------------------------------
struct Y { int m;};
class X {
Y* p;
public:
Y* operator->();
X() { p = 0;};
};
Y* X::operator->() {
if (p == 0) p = new Y;
return p;
};
main() {
X an_x;
an_x->m = 5;
};
-------------------------------------------------------------------------------
[6]% g++ -v -c opptr.cc
g++ version 1.31.0
/usr/local/lib/gcc-cpp+ -v -undef -D__GNU__ -D__GNUG__ -Dvax -Dunix opptr.cc /tmp/cc008179.cpp
GNU CPP version 1.31.0
/usr/local/lib/gcc-c++ /tmp/cc008179.cpp -quiet -dumpbase opptr.cc -noreg -version -o /tmp/cc008179.s
GNU C++ version 1.31.0 (vax) compiled by GNU C version 1.31.
opptr.cc:5: wrong number of parameters to `operator ->()'
opptr.cc:5: `operator ->()' must have at least one class type
opptr.cc:8: parse error before `{'
In function main ():
opptr.cc:14: base operand of `->' is not a pointer
Compilation finished at Mon Dec 19 15:19:41
Glen Ditchfield gjditchfield@violet.uwaterloo.ca Office: DC 2517
Dept. of Computer Science, U of Waterloo, Waterloo, Ontario, Canada, N2L 3G1
"... and the rest, we will spend foolishly!" -- _Svengali_