Revision [15213]
This is an old revision of KeyPgTypeof made by ChA0s on 2011-09-03 05:50:35.
TYPEOF
Returns the type of a variable.
Syntax:
Typeof ( variable | datatype )
Parameters:
Description:
Typeof is a compiler intrinsic that replaces itself with the type of the variable passed to it. It can either be used in a variable declaration (Example 1) or it can be used in the preprocessor for comparison, printing. (Example 2)
Typeof also supports passing any intrinsic data type, or user-defined type, not only variables defined as those types. Also supported are expressions, the type is inferred from the expression (much like KeyPgVar Var)
Typeof also supports passing any intrinsic data type, or user-defined type, not only variables defined as those types. Also supported are expressions, the type is inferred from the expression (much like KeyPgVar Var)
Examples:
Example 1:
Dim As Integer foo
Dim As TypeOf(67.2) bar '' '67.2' is a literal double
Dim As TypeOf( foo + bar ) teh_double '' double + integer results in double
Print Len(teh_double)
Dim As TypeOf(67.2) bar '' '67.2' is a literal double
Dim As TypeOf( foo + bar ) teh_double '' double + integer results in double
Print Len(teh_double)
Example 2:
Dim As String foo
#print TypeOf(foo)
#if TypeOf(foo) = Integer
#print "Never happened!"
#endIf
#print TypeOf(foo)
#if TypeOf(foo) = Integer
#print "Never happened!"
#endIf
Dialect Differences:
- Not available in the CompilerOptlang -lang qb dialect unless referenced with the alias __Typeof.
Differences from QB:
- New to FreeBASIC
See also:
Back to Miscellaneous
