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Data Definitions
double
extern
register
_ fixed(n)
unsigned
signed
volatile
const
rom
void
readonly
_bif
Is a reserved word but is not a supported data type.
External variable used with multiple compilation units. No storage is allocated. Is
used to make otherwise out of scope data accessible. there must be a non-extern
definition at the global level in some compilation unit.
Is allowed as a qualifier however, has no effect.
Creates a fixed point decimal number where n is how many decimal places to
implement.
Data is always positive. This is the default data type if not specified.
Data can be negative or positive.
Tells the compiler optimizer that this variable can be changed at any point during
execution.
Data is read-only. Depending on compiler configuration, this qualifier may just make
the data read-only -AND/OR- it may place the data into program memory to save
space. (see #DEVICE const=)
Forces data into program memory. Pointers may be used to this data but they can not
be mixed with RAM pointers.
Built-in basic type. Type void is used to indicate no specific type in places where a
type is required.
Writes to this variable should be dis-allowed
Used for compiler built in function prototypes on the same line
Special types
enum enumeration type: creates a list of integer constants.
enum
[id]
{ [ id [ = cexpr]] }
One or more comma separated
The id after enum is created as a type large enough to the
largest constant in the list. The ids in the list are each created as
a constant. By default the first id is set to zero and they
increment by one. If a = cexpr follows an id that id will have the
value of the constant expression an d the following list will
increment by one.
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