__FB_ARG_LEFTOF__keyword

Intrinsic define (macro) performed by the compiler.

Syntax

__FB_ARG_LEFTOF__( arg, sep [, ret] )

Parameters

Name		Description
`arg`		argument
`sep`		separator, obviously different from the comma (,)
`ret`		default return if separator not found

Description

Returns the left token of the argument (arg), based on the separator (sep).
(in the expression of the argument, the tokens and the separator must be spaced)

By default, if the default return (ret) is not given, the macro returns nothing (empty token) if the separator (sep) is not found.
Otherwise, if the default return (ret) is given, the macro returns the default return (ret) if the separator (sep) is not found.

Remarks

Version

Since fbc 1.08.0

Differences from QB

New to FreeBASIC

Example

#macro m( arg )

    Scope

        Var v = __FB_ARG_LEFTOF__( arg, versus, "Not found 'versus'" )

        Print v

    End Scope

#endmacro



m(1 versus 2)

m("left-side" versus "right-side")

m(3.14 verso pi)



Sleep



/' Output:

 1

left-side

Not found 'versus'

'/

Reference

Documented in KeyPgDdfbargleftof.html