"Trey Jackson" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> [...]
> I was unable to get that to compile.
> Linux gcc 3.2.1, or HP aCC: HP ANSI C++ B3910B X.03.32
>
> The linux error gave me a syntax error before the '{' token on the lines
> declaring 'insertCode' in both SubstituteHello and SubstituteGoodbye.
That's correct.
> ,----------------
> | #include <iostream>
> |
> | using std::cout; using std::endl;
> |
> | template<class ToBeSubstituted>
> | struct userClass {
> | void function() {
> | // code is inserted here, not a function call to a member of
> | ToBeSubstituted::insertCode();
> | }
> | };
> |
> | struct SubstituteHello {
> | typedef void fn();
> |
> | static fn insertCode {
> | cout << "hello world" << endl;
> | }
> | };
You can use a typedef to declare a function, but not to define one.
This code should actually be:
static void insertCode() { ...
> | struct SubstituteGoodbye {
> | typedef void fn();
> |
> | static fn insertCode {
> | cout << "goodbye world" << endl;
> | }
> | };
And here.
> [...]
> This compiles, runs with undesired behavior;
> ,----------------
> | struct SubstituteHello {
> | typedef void fn();
> |
> | static void insertCode()
> | {
> | dummy d;
> | cout << "Hello World" << endl;
> | }
That's pretty much how you have to do it.
> | // typedef void fn();
> | // static fn insertCode {
> | // cout << "hello world" << endl;
> | // }
> | };
> `----------------
> [...]
Dave
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