Difference between revisions of "ASSERT"

Revision as of 14:23, 23 April 2009

Class

Error Handling and Debugging

Purpose

Display a message dialog with options when a condition evaluates to False

Syntax

ASSERT <expL> [MESSAGE <expC>]

See Also

DEBUG, SET ASSERTS, SET COMPILE

Description

The ASSERT command is used for program debugging purposes: to display a message dialog with options when a condition evaluates to False (.F.). The condition is specified in <expL>. An optional message can be specified using the MESSAGE <expC> clause. If no message is specified; the default message is:

Assertion failed on line <#> of
           procedure <prg>.

The dialog has four buttons, offering the following options:

If SET ASSERTS is OFF, asserts are ignored. SET ASSERTS is OFF by default.

Example

set asserts on
 
procedure proc1
 
parameters para1, para2, para3
assert pcount() = 3 message [3 parameters required]
// code continues
 
return

Products

Recital Mirage Server, Recital Terminal Developer