add defun2 for adding documentation to function written by C language

[YoheiKakiuchi]

I add defun2 function for adding documentation string to function writtin by C.

example in eus/c/arith.c
- defun(ctx,"=",mod,NUMEQUAL);                                                                                                 
+ defun2(ctx,"=",mod,NUMEQUAL,"euqal numbers");

We can take another strategy updating defun function as defun2 like and adding documentation to all existing code.

defun (ctx, "func", mod, FUNC) -> defun (ctx, "func", mod, FUNC, NULL)

related to jsk-ros-pkg/jsk_roseus#178

[k-okada]

I prefer
defun (ctx, "func", mod, FUNC) -> defun (ctx, "func", mod, FUNC, NULL)
to avoid writing documentation on what is the difference between defun and defun2.

[garaemon]

defun2!! it sounds bad. at least, it should be 'defun_with_doc'

[YoheiKakiuchi]

In C, we can't use optional argument.
So if number of arguments is changed, we should change all codes (such as roseus.cpp ...)

[k-okada]

yes, that's ok and I think we do not use such source code other than
roseus.cpp

¶

Kei Okada

On Fri, Dec 5, 2014 at 2:28 PM, Yohei Kakiuchi [email protected]
wrote:

In C, we can't use optional argument.
So if number of arguments is changed, we should change all codes (such as
roseus.cpp ...)

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#75 (comment).

[k-okada]

rebased and create new PR #111