T.Day@CS.UCL.AC.UK (Tim Day) (05/04/89)
The below example gives a 'Program c++ got fatal signal 6.' under
g++ version 1.34.2.
---------
#include <String.h>
String blurb("bleah");
class Foo
{ String a;
public:
Foo() {}
virtual void scooby(String s=blurb) {a=s;}
virtual void doobie(String s=String("bleaurgh")) {a=s;}
};
class Bar : public Foo
{ String b;
public:
Bar() {}
virtual void scooby(String s=blurb) {b=s;}
virtual void doobie(String s=String("bleaurgh")) {b=s;}
// Above line causes problem
};
main()
{ Foo x;
Bar y;
exit(0);
}
----------
Commenting out the 'doobie' member function of 'Bar' eliminates this.
I'm not sure if this sort of default arg. should be allowed anyway since
the two 'String("bleaurgh")'s are effectively different things, but obviously
an error message of some sort is preferable
Timgordon%stats.ucl.ac.uk@NSFNET-RELAY.AC.UK (Gordon Joly) (05/05/89)
Tim,
Is this fixed in 1.35.0- ?
Gordon.
karl:/stats/staff/karl/gordon/c++[60] make scoobie
g++ -g -lg++ -lm scoobie.cc -o scoobie
scoobie.cc:13: sorry, not implemented: that operation not supported for default parameters
g++: Program c++ got fatal signal 6.
make: *** Error 1
karl:/stats/staff/karl/gordon/c++[61] g++ -v
g++ version 1.35.0-
karl:/stats/staff/karl/gordon/c++[62] date
Fri May 5 13:44:03 BST 1989
karl:/stats/staff/karl/gordon/c++[63] cat -n scoobie.cc
1 //The below example gives a 'Program c++ got fatal signal 6.' under
2 // g++ version 1.34.2.
3 // ---------
4 #include <String.h>
5
6 String blurb("bleah");
7
8 class Foo
9 { String a;
10 public:
11 Foo() {}
12 virtual void scooby(String s=blurb) {a=s;}
13 virtual void doobie(String s=String("bleaurgh")) {a=s;}
14 };
15
16 class Bar : public Foo
17 { String b;
18 public:
19 Bar() {}
20 virtual void scooby(String s=blurb) {b=s;}
21 virtual void doobie(String s=String("bleaurgh")) {b=s;}
22 // Above line causes problem
23 };
24
25 main()
26 { Foo x;
27 Bar y;
28
29 exit(0);
30 }
31 // ----------
32 // Commenting out the 'doobie' member function of 'Bar' eliminates this.
33 // I'm not sure if this sort of default arg. should be allowed anyway since
34 // the two 'String("bleaurgh")'s are effectively different things, but obviously
35 // an error message of some sort is preferable
36 //
37 // Tim
38
karl:/stats/staff/karl/gordon/c++[64] T.Day@CS.UCL.AC.UK (Tim Day) (05/05/89)
But you do get an error message now ("sorry, not implemented:"...etx),
whereas 1.34.2 just dies.
I didn't realise we had 1.35.0.. On Karl 'which g++' now gives
the span copy... will have to fiddle with my $path.