AssertWarnkeyword

Debugging macro that prints a warning if an expression evaluates to 0.

Syntax

#define AssertWarn(expression) If (expression) = 0 Then : fb_AssertWarn( __FILE__, __LINE__, __FUNCTION__, #expression ) : End If

Parameters

Name		Description
`expression`		Any valid expression. If
`expression`		evaluates to `0`, a warning message is printed to stderr (console).

Description

The AssertWarn macro is intended for use in debugging and works only if the -g option is selected in the FBC command line. In this case it prints a warning message if expression evaluates to 0. It doesn't stop the program execution like Assert does.

Its normal use is to check the correct value of the variables during debugging.

If -g is not passed to fbc, the macro does not generate any code.

Remarks

Usage



AssertWarn( expression )

Dialect Differences

Not available in the -lang qb dialect unless referenced with the alias __ASSERTWARN.

Differences from QB

New to FreeBASIC

Example

Sub foo

  Dim a As Integer

  a=0

  AssertWarn(a=1)

End Sub



foo 



'' If -g is used this code prints: test.bas(3): assertion failed at FOO: a=1

Reference

Documented in KeyPgAssertwarn.html