REPLACE-GLR : WFFOPREPLACE-GLR is a wff operation.
Replace the left-hand side of an infix operator non-destructively.
The calling scheme for REPLACE-GLR is:
(REPLACE-GLR GWFF NEWGLRWFF)
The result is of type GWFF.
The arguments have the following meaning:
GWFF : gwff
NEWGLRWFF : New glr
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