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• Lexeme-token

Lexeme-token->unwrap

Get the unwrap field from a lexeme-token.

Signature

(lexeme-token->unwrap x) → unwrap

Arguments

x — Guard (lexemep x).

Returns

unwrap — Type (tokenp unwrap).

This is an ordinary field accessor created by fty::defprod.

Definitions and Theorems

Function: lexeme-token->unwrap$inline

(defun lexeme-token->unwrap$inline (x)
  (declare (xargs :guard (lexemep x)))
  (declare (xargs :guard (equal (lexeme-kind x) :token)))
  (let ((__function__ 'lexeme-token->unwrap))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((x (and (equal (lexeme-kind x) :token) x)))
           (token-fix (std::da-nth 0 (cdr x))))
         :exec (std::da-nth 0 (cdr x)))))

Theorem: tokenp-of-lexeme-token->unwrap

(defthm tokenp-of-lexeme-token->unwrap
  (b* ((unwrap (lexeme-token->unwrap$inline x)))
    (tokenp unwrap))
  :rule-classes :rewrite)

Theorem: lexeme-token->unwrap$inline-of-lexeme-fix-x

(defthm lexeme-token->unwrap$inline-of-lexeme-fix-x
  (equal (lexeme-token->unwrap$inline (lexeme-fix x))
         (lexeme-token->unwrap$inline x)))

Theorem: lexeme-token->unwrap$inline-lexeme-equiv-congruence-on-x

(defthm lexeme-token->unwrap$inline-lexeme-equiv-congruence-on-x
  (implies (lexeme-equiv x x-equiv)
           (equal (lexeme-token->unwrap$inline x)
                  (lexeme-token->unwrap$inline x-equiv)))
  :rule-classes :congruence)

Theorem: lexeme-token->unwrap-when-wrong-kind

(defthm lexeme-token->unwrap-when-wrong-kind
  (implies (not (equal (lexeme-kind x) :token))
           (equal (lexeme-token->unwrap x)
                  (token-fix nil))))