Pike: types

types - how to describe types internally

When describing types to add_function or add_efun you always write it in a string. You write the type just as you would in Pike. The internal types have a few extra features though. Here is a brief explanation of the syntax:

type you write:

int "int"

float "float"

string "string"

mapping "mapping(mixed:mixed)" or "mapping"

array of int "array(int)" or "int *"

function(int:int) "function(int:int)"

varargs function "function(int ...:int)"

int or string "int|string"

Then there are a few tricks you can use, say you have a function which returns an int except if you call it with a string in which case it return a string:

"!function(string:mixed)&function(mixed:int)|function(string:string)"

The & and ! operators work as you might expect but are only useful together.

KEYWORDS

data_types

SEE ALSO

add_function and add_efun

type	you write:
int	"int"
float	"float"
string	"string"
mapping	"mapping(mixed:mixed)" or "mapping"
array of int		"array(int)" or "int *"
function(int:int)	"function(int:int)"
varargs function	"function(int ...:int)"
int or string		"int\|string"