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I use the following code a lot in C:
typedef struct { int member; } structname; Now i'm trying to keep that struct definition local to a particular source file, so that no other source file even knows the struct exists. I tried the following:
static typedef struct { int member; } structname; but GCC whines because of an illegal access specifier. Is it even possible to keep a struct's declaration private to a source file?
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typedef cannot be used along with static as both typedef and static are storage classes. If you define a variable as typedef static int a; then there exist multiple storage classes for the variable a . Storage classes are used to define the scope (visibility) and life-time of variables and/or functions.
A structure declaration cannot be declared static, but its instancies can. You cannot have static members inside a structure because the members of a structure inherist the storage class of the containing struct. So if a structure is declared to be static all members are static even included substructures.
Using typedef struct results in a cleaner, more readable code, and saves the programmer keystrokes. However, it also leads to a more cluttered global namespace which can be problematic for large programs.
You can't "typedef a struct", that doesn't mean anything.
If you declare the typedef struct within a .c file, it will be private for that source file.
If you declare this typedef in a .h file, it will be accesible for all the .c files that include this header file.
Your statement:
static typedef struct Is clearly illegal since you are neither declaring a variable nor defining a new type.
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