struct s1 { template < typename> // forward declare s2struct s2; template < typename T> auto f() - > decltype(s2< T> ::type::f()); template< typename> struct s2 {}; } 當這個新行為剖析缺少必要 typename 關鍵字的 decltype 運算式,以將相依名稱指定為類型時,編譯器就會發出編譯器警告 ...
Don't do this. Choose one or the other. (edit) Or at least put the forward-declaration before the#include-ion of the complete declaration. If all you're doing ingame_corridor.hppis setting pointers to aLevel, then a forward declare should do fine. If however you need to call functions...
Forward declare a templatized class by: mark.moore | last post by: I know this has been asked before, but I just can't find the answer in the sea of hits... How do you forward declare a class that is *not* paramaterized, but is based on a template class? Here's what I ...
struct s1 { template < typename> // forward declare s2struct s2; template < typename T> auto f() - > decltype(s2< T> ::type::f()); template< typename> struct s2 {}; } 此新行为分析 decltype 表达式时(该表达式缺少将依赖名称指定为类型所必须使用的关键字 typename),编译器将发出编译器...
1 invalid forward declaration of struct 6 C forward declaration of struct in header 1 compiler giving error on forward struct declaration 2 Why does forward declaration of struct not work? 1 Cannot forward declare a typedef? 1 Forward Struct Declaration in C; not working 0 Regarding forwar...
/* Declare lisp lval Struct */ struct lval { int type; /* Basic */ long num; char *err; char *sym; /* Function */ lbuiltin builtin; lenv *env; lval *formals; lval *body; /* Expression */ int count; struct lval **cell; ...
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intmain(intargc,char*argv[]){foo("bar");/* implicitly declare: int foo() */return0;}void...
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