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POHow to import std::less<T> as a typename?
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copied!<p>I have the following code in Sol.h with most omitted due to school rules:</p> <pre><code>template <typename T,int promote = 1, typename compare = std::less<T>() > class Sol{ private: struct node{ T data; struct node *next; struct node *previous; }; node *head, *tail; public: typedef unsigned int size_type; typedef T key_type; typedef T value_type; size_type count; Sol() : head(0), tail(0) { count=0; } </code></pre> <p>Basicly it is a container similar to vector but it does some things that we are required to template. I can't seem to get the "typename compare = std::less< T>" -ignore the space.</p> <p>When I compile with the test code I get two errors from Sol.h and the rest all relate to them.</p> <pre><code>>temple> g++ -Wall -Wextra -ansi -pedantic Sol.h main.cc Sol.h:6:61: error: expected type-specifier Sol.h:6:61: error: expected '>' main.cc: In function 'int main()': main.cc:19:19: error: template argument 3 is invalid main.cc:19:24: error: invalid type in declaration before '(' token main.cc:19:48: error: expression list treated as compound expression in initializer [-fpermissive] main.cc:19:48: warning: left operand of comma operator has no effect [-Wunused-value] main.cc:19:48: error: invalid conversion from 'char*' to 'int' [-fpermissive] main.cc:20:19: error: template argument 3 is invalid main.cc:20:31: error: expected initializer before 'it' main.cc:22:13: error: request for member 'erase' in 'foo', which is of non-class type 'int' main.cc:24:9: error: 'it' was not declared in this scope main.cc:24:18: error: request for member 'find' in 'foo', which is of non-class type 'int' main.cc:25:9: error: request for member 'end' in 'foo', which is of non-class type 'int' main.cc:28:13: error: request for member 'find' in 'foo', which is of non-class type 'int' main.cc:30:13: error: request for member 'find' in 'foo', which is of non-class type 'int' main.cc: In function 'std::string cat(const T&) [with T = int, std::string = std::basic_string<char>]': main.cc:23:24: instantiated from here main.cc:12:35: error: 'int' is not a class, struct, or union type main.cc:12:50: error: request for member 'end' in 'con', which is of non-class type 'const int' main.cc:12:35: error: 'int' is not a class, struct, or union type main.cc:12:35: error: 'int' is not a class, struct, or union type main.cc:12:35: error: 'int' is not a class, struct, or union type </code></pre> <p>To be clear line 6 is the template line.</p>

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