2.2 COM Types
In the result of a function like com-method-type, a type 'mx-any standards for a character, real number, string, boolean, COM currency (as in com-currency?), COM date (as in com-date?), COM scode value (as in com-scode?), COM IUnknown value (as in com-iunknown?, or COM object (as in com-object?).}
| (com-object-type obj) → com-type? |
| obj : com-object? |
Returns a type for a COM object.
| (com-is-a? obj type) → boolean? |
| obj : com-object? |
| type : com-type? |
Return #t if obj is of the
type type.
| (com-currency? v) → boolean? |
| v : any/c |
Returns #t if v is a COM currency value,
#f otherwise.
| (com-currency->number curr) → real? |
| curr : com-currency? |
Returns a number for curr.
| (number->com-currency n) → com-currency? |
| n : real? |
Converts a number to a COM currency value. A currency value is
repsented with a 64-bit two’s-complement integer, though n
may contain decimal digits. If n is too large, an
exception is raised.
Returns #t if v is a COM date value, #f
otherwise.
| (com-date->date d) → date? |
| d : com-date? |
Converts a COM date to an instance of the date structure
type. In the result, the dst? field is always #f,
and the time-zone-offset field is 0.
| (date->com-date d) → com-date? |
| d : date? |
Converts a date instance to a COM date value.
| (com-scode? v) → boolean? |
| v : any/c |
Returns #t if v is a COM scode value, #f
otherwise.
| (com-scode->number sc) → integer? |
| sc : com-scode? |
Converts a COM scode value to an integer.
| (number->com-scode n) → com-scode? |
| n : integer? |
Converts a number to a COM scode value. The number must be
representable as a 32-bit two’s-complement number, otherwise an
exception is raised.
| (com-iunknown? v) → boolean? |
| v : any/c |
Returns #t if v is a COM IUnknown value,
#f otherwise.
Used with com-invoke to represent an argument that is not
provided.