[#FB_VA_GLUE]
= FB_VA_GLUE
:mrdocs:

Concatenate two preprocessor tokens by juxtaposition, forcing an extra expansion pass.

== Synopsis

Declared in `<folly/Preprocessor.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
#define FB_VA_GLUE(a, b)

----

== Description

MSVC's preprocessor is a pain, so we have to forcefully expand the VA args in some places.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| The first token.
| *b*
| The second token, placed after `a.`
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#