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Use union to discriminate pointer types from enum/int types.

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This commit is contained in:
Skip Montanaro 2006-04-13 09:37:01 +00:00
parent 83687c98dc
commit b940671186
2 changed files with 9 additions and 8 deletions
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10
Include/asdl.h
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@ -19,18 +19,22 @@ typedef enum {false, true} bool;
typedef struct {
int size;
void *elements[1];
union {
void *elements[1];
unsigned int enum_type[1];
} elt;
} asdl_seq;
asdl_seq *asdl_seq_new(int size, PyArena *arena);
#define asdl_seq_GET(S, I) (S)->elements[(I)]
#define asdl_seq_GET(S, I) (S)->elt.elements[(I)]
#define asdl_seq_GET_ENUM(S, I) (S)->elt.enum_type[(I)]
#define asdl_seq_LEN(S) ((S) == NULL ? 0 : (S)->size)
#ifdef Py_DEBUG
#define asdl_seq_SET(S, I, V) { \
int _asdl_i = (I); \
assert((S) && _asdl_i < (S)->size); \
(S)->elements[_asdl_i] = (V); \
(S)->elt.elements[_asdl_i] = (V); \
}
#else
#define asdl_seq_SET(S, I, V) (S)->elements[I] = (V)