xctocc Types

These basic types are as in C++:

• int int
• short short
• long long
• unsigned unsigned
• float float
• double double

These type as similar to C++ types, with extended Scheme meaning:

• char char -- a character in Scheme
• byte byte -- like a C++ char, but a number in Scheme
• Long Long -- forced to be an integer from Scheme (i.e. the parameter cannot be an inexact number)
• Double Double -- forced to be a floating-point number from Scheme (i.e. the parameter cannot be an exact integer)
• string string -- a null-terminated string; char * in C++
• nstring nstring -- a null-terminated string or NULL; char * in C++
• cstring cstring -- a constant string; const char * in C++
• ncstring ncstring -- a constant string or NULL; const char * in C++
• ustring ustring -- a null-terminated string; unsigned char * in C++
• nustring nustring -- a null-terminated string or NULL; unsigned char * in C++
• custring custring -- a constant string; const unsigned char * in C++
• ncustring ncustring -- a constant string or NULL; const unsigned char * in C++
• bool bool -- a boolean in Scheme; the C++ representation must be specified with @BOOLEAN

When a type is followed by * *, then the type is interepreted as a modifiable (single) indirect value.

When a type is followed by ? ?, then the type is interepreted as a modifiable indirect value or a NULL pointer.

When a type is followed by & &, then the type is interpreted as call-by-reference (or return-by-reference).

When a type is followed by [] [], then the type is interpreted as an array; the value must be manually bundled and unbundled with macros.

A class name can be used, followed by either !, , or % %. ! indicates a pointer to an object, indicates a possibly NULL pointer, and % indicates a object passed by reference.

Any other valid C++ type can be used, but the value must be manually bundled and unbundled with macros.

An xctocc type is translated appropriately in the C++ glue code. For example, Long? becomes long * and MyClass% becomes MyClass&.