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FUNCTION ISFIELD()
Short:
------
ISFIELD() Determines if an expression is the name of a field
Returns:
--------
<lIsfield> => Is the expression a field
Syntax:
-------
ISFIELD(cExpress)
Description:
------------
Determines if <cExpress> contains the name of a
field. If <cExpress> contains an alias, the area of the alias
will be checked.
Examples:
---------
isfield( "LASTNAME" ) // actual field, returns .t.
isfield( "CUSTOMER->LASTNAME") // actual field, returns .t.
isfield( "LEFT(LNAME,5)" ) // expression, returns .f.
Notes:
-------
Companion functions are ISTHISAREA(), ISEDITABLE(),
PARSFIELD(), PARSALIAS(), EXPBLOCK(), WORKBLOCK()
Source:
-------
S_FIELDS.PRG
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