error message-help
Author
hey guys,
i''m one huge error away from finishing my work, but can''t understand what this error message means or what i''m doing wrong. here''s the message:
"/opt/SUNWspro/WS6U2/include/CC/Cstd/./algorithm.cc", line 69: Error: The operat
ion "Widget == const std::basic_string, std::alloca
tor>" is illegal.
"inventory.cc", line 23: Where: While instantiating "std::find>::iterator, std::basic_string, std::allocator>>(std::list>::iterat
or, std::list>::iterator, const std::basic_string
, std::allocator>&)".
"inventory.cc", line 23: Where: Instantiated from non-template code.
1 Error(s) detected.
in my code, line 69 is this:
list::iterator have =
find_if(available.begin(), available.end(), test);
and line 23 is:
list::iterator we_need =
find(not_available.begin(), not_available.end(),widget.digits());
i''ve included #include <algorithm> on top... that''s what find and find_if belong to, correct? the only thing i can conclude from these error messages is that there''s a problem with find and find_if.
thanks!
If I had to guess, I would say the problems seem to lie with test and widget.digits(). What types are those two?
Author
quote:Original post by SiCrane
If I had to guess, I would say the problems seem to lie with test and widget.digits(). What types are those two?
i guess the name digits() is a bit misleading... it returns a string, containing numbers to this widget.
and the test comes from me making a separate tester class. i created this small class for defining the function call operator, allowing an instance of the class to be used as a function.
But what types does test::operator() accept and return? That is, what function signature is it imitating?
Author
perhaps this will better answer your question:
within class tester, i have
bool operator () (Widget & widget)
{ return widget.digits() == test_digits; }
within class tester, i have
bool operator () (Widget & widget)
{ return widget.digits() == test_digits; }
Actually, I think I was barking up the wrong tree. I re-read your error messages. Is not_available a std::list of Widget objects?
Author
quote:Original post by SiCrane
Actually, I think I was barking up the wrong tree. I re-read your error messages. Is not_available a std::list of Widget objects?
not_available was declared under protected in a class like this:
list not_available; same with available.
So Widget.digits() is returning a std::string and you''re trying to use that string to search through a list of Widget''s? This is probably what''s causing the error, unless operator==() is overloaded on Widget to compare against a std::string.
Author
hey SiCran, thanks for your replies. i finally figured it out, and it''s compiling for now.
have a g''nite!
have a g''nite!
This topic is closed to new replies.
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