VA_ARG

• Source: https://www.freebasic.net/wiki/wikka.php?wakka=KeyPgVaArg
• Last revised: 2019-03-10

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Returns the current argument from a variable argument list.

Syntax

` variable = va_arg ( argument_list, datatype )

`

Description

The va_arg macro allows the use of a variable number of arguments within a function:

• va_arg returns the current argument in the list, argument_list, with an expected data type of datatype.
• Before first va_arg use, argument_list must be initialized with the command va_first.
• Unlike the C macro with the same name, va_arg does not automatically increment argument_list to the next argument within the list. Instead va_next must be used to find the next argument in adjusting argument_list.

Not supported when using -gen gcc. Use cva_list variadic argument list type for cross platform compatibility.

Examples

See the va_first() examples.

Dialect Differences

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

Differences from QB

• New to FreeBASIC

See also

• ... (Ellipsis)
• va_first
• va_next

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