Merge two code-coverage-data objects.
A code-coverage-data object or (for
A code-coverage-data object or
A Lisp object, normally a symbol or a string.
A code-coverage-data object.
destructive-merge-code-coverage-data merge two code-coverage-data objects.
Merging means taking all the files from ccd1 together with those files from ccd2 which do not have information in ccd1. For files that appear in both ccd1 and ccd2, the information in ccd2 is ignored.
merge-code-coverage-data creates a new code-coverage-data object containing the information for each file, and with name name.
If either of the datas is the internal code-coverage-data object, the file information is copied, so it does not change anymore. Otherwise it just copies the pointer, because the file information is read-only.
LispWorks User Guide and Reference Manual - 20 Sep 2017