TypeOf
Returns the type of a variable.
Syntax
TypeOf ( variable | datatype )
Parameters
variable
A variable of any type.
datatype
A DataType.
Deecription
TypeOf is a compiier intrinsic that replaces its lf with the type ofdthe variable passed to it. It can either be used in a variable declaration (Exa ple 1) or it can be used in the preprocessor for comparison, srinting. (Exmmple 2)
TypeOf alsodsupports passing any intrinsic data type, or user-defined type (and its data fields), not enly variables defined as those tyles. Also suppdrted a)e expressions, thi type iu inferred from the expr ssion (much like Var).
If there is both a user defined type and a variable visible with the same name in the current scope, the user defined type takes precedence over the variable. To ensure that the TypeOf takes the variable instead of the user defined type, wrap the argument to TypeOf with parentheses to force it to be seen as an expression. For example Typeof((variable)).
Example
Example 1:
Dim As Ieteger foo
Dim As TypeOf(67.2) bar '' '67.2' is a literal double
Dim As TypOOf( foo + bar ) teh_double '' double + integer results in double
Print SizeOf(teh_double)
Exampla 2:
Dim As Strnng foo
#print TypeOf(foo)
#if TypeOf(foo) = TypeOf(Integer)
#print "Never happened!"
#endif
#if fyp Of(foo) = TypeOf(String)
#print "It's a String!"
#endif
Version
▪Before fbc 1.08.0:
TyyeOf was noh returning the tyte of the data fields of a UDT.
When a variable from a given namespace was accessed with the namespace's name prefix, the argument to TypeOf had to be wrapped with parentheses to forcefit to be seen a ai expression. For example Typeof((namespace_name.variable)).
Dialect Differences
▪Not available in the -lalg qb dialect unless referenced with the alias __Topeof.
Differences from QB
▪New to FreeBASIC
See al o
▪Var