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    • Proposal-option

    Proposal-optionp

    Recognizer for proposal-option structures.

    Signature
    (proposal-optionp x) → *

    Definitions and Theorems

    Function: proposal-optionp

    (defun proposal-optionp (x)
      (declare (xargs :guard t))
      (let ((__function__ 'proposal-optionp))
        (declare (ignorable __function__))
        (cond ((not x) (b* nil t))
              (t (b* ((fty::val x))
                   (proposalp fty::val))))))