Function: field-string
field-string is a function defined in editfns.c.
Signature
(field-string &optional POS)
Documentation
Return the contents of the field surrounding POS as a string.
A field is a region of text with the same field property.
If POS is nil, the value of point is used for POS.
Probably introduced at or before Emacs version 21.1.
Source Code
// Defined in /usr/src/emacs/src/editfns.c
{
ptrdiff_t beg, end;
find_field (pos, Qnil, Qnil, &beg, Qnil, &end);
return make_buffer_string (beg, end, 1);
}