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• Values

Expr-value-result

Fixtype of expression values and errors.

This is a sum-of-products (i.e., union) type, introduced by fty::defflexsum.

Members

:ok → expr-value-result-ok

:err → expr-value-result-err

Theorem: not-errorp-when-expr-valuep

(defthm not-errorp-when-expr-valuep
  (implies (expr-valuep x)
           (not (errorp x))))

Subtopics

Expr-value-result-fix

Fixing function for expr-value-result structures.

Expr-value-result-equiv

Basic equivalence relation for expr-value-result structures.

Expr-value-resultp

Recognizer for expr-value-result structures.

Expr-value-result-ok

Expr-value-result-err

Expr-value-result-kind

Get the kind (tag) of a expr-value-result structure.