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libcore: Make ctypes::void an unconstructable, undestructurable tag

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This commit is contained in:
Brian Anderson 2012-01-14 03:13:09 -08:00
parent 26551e5481
commit d978aace53
1 changed files with 20 additions and 5 deletions
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25
src/libcore/ctypes.rs
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@ -9,6 +9,15 @@ FIXME: Add a test that uses some native code to verify these sizes,
which are not obviously correct for all potential platforms.
*/
export c_int, c_uint, long, longlong, unsigned, ulong, ulonglong;
export intptr_t, uintptr_t;
export uint32_t;
export void;
export c_float, c_double;
export size_t, ssize_t;
export off_t, fd_t, pid_t;
export enum;
// PORT adapt to architecture
/*
@ -80,13 +89,19 @@ type uint32_t = u32;
/*
Type: void
A type, a pointer to which can be used as C `void *`
A type, a pointer to which can be used as C `void *`.
Note that this does not directly correspond to the C `void` type,
which is an incomplete type. Using pointers to this type
when interoperating with C void pointers can help in documentation.
The void type cannot be constructed or destructured, but using
pointers to this type when interoperating with C void pointers can
help in documentation.
*/
type void = int;
tag void {
// Making the only variant reference itself makes it impossible to
// construct. Not exporting it makes it impossible to destructure.
void_private(@void);
// FIXME: #881
void_private2(@void);
}
/*
Type: c_float