On 20.11.2015 23:56, Spacen Jasset wrote:
The ideal would be to have a struct that can be placed inside a function
scope, or perhaps as a module global variable. Why does Ft_Init_FreeType
have to be read at compile time?
text.d(143,15): Error: static variable FT_Init_FreeType cannot be read
at compile time
text.d(174,43): called from here: initialise()
struct FreeType
{
@disable this();
static FreeType initialise()
{
return FreeType(0);
}
this(int)
{
int error = FT_Init_FreeType(&library); /// ERROR
enforce(!error);
}
alias library this;
~this()
{
FT_Done_FreeType(library);
}
FT_Library library;
}
FreeType freeType = FreeType.initialise();
FT_Init_FreeType must be read at compile time, because freeType is a
module level variable, and initializers for module variables must be
static values. The initializer is run through CTFE (Compile Time
Function Evaluation).
Put the initialization/assignment in a function and it should work. That
function can be a static constructor or the main function:
----
FreeType freeType = void; /* 'void' prevents default initialization */
static this() {freeType = FreeType.initialise();} /* should work */
void main() {freeType = FreeType.initialise();} /* too */
----
