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• Split-fn

Decl-to-ident-paramdecl-map

Convert a regular declaration into an omap of identifiers to parameter declarations.

Signature

(decl-to-ident-paramdecl-map decl) → map

Arguments

decl — Guard (declp decl).

Returns

map — Type (ident-paramdecl-mapp map).

The resulting parameter declarations represent the same variables, with the same types and qualifiers. The keys to the omap are the identifiers bound by each parameter declaration.

A declaration which introduces multiple variables is converted to an omap of equal length to the number of identifiers. For instance, the declaration int x = 0, y = 0; is converted to the omap associating x to parameter declaration int x, and y to int y.

Only variable declarations are converted. Static assertions result in nil.

This is used by split-fn to track declared variables and to create parameters for the newly generated function (with the subset of declared variables which are used).

Definitions and Theorems

Function: decl-to-ident-paramdecl-map0

(defun decl-to-ident-paramdecl-map0 (declspecs initdeclors)
 (declare (xargs :guard (and (decl-spec-listp declspecs)
                             (initdeclor-listp initdeclors))))
 (let ((__function__ 'decl-to-ident-paramdecl-map0))
  (declare (ignorable __function__))
  (b* (((when (endp initdeclors)) nil)
       ((initdeclor initdeclor)
        (first initdeclors))
       (ident (declor->ident initdeclor.declor)))
   (omap::update
     ident
     (make-paramdecl :spec declspecs
                     :decl (paramdeclor-declor initdeclor.declor))
     (decl-to-ident-paramdecl-map0 declspecs (rest initdeclors))))))

Theorem: ident-paramdecl-mapp-of-decl-to-ident-paramdecl-map0

(defthm ident-paramdecl-mapp-of-decl-to-ident-paramdecl-map0
  (b* ((map (decl-to-ident-paramdecl-map0 declspecs initdeclors)))
    (ident-paramdecl-mapp map))
  :rule-classes :rewrite)

Function: decl-to-ident-paramdecl-map

(defun decl-to-ident-paramdecl-map (decl)
  (declare (xargs :guard (declp decl)))
  (let ((__function__ 'decl-to-ident-paramdecl-map))
    (declare (ignorable __function__))
    (decl-case
         decl
         :decl (decl-to-ident-paramdecl-map0 decl.specs decl.init)
         :statassert nil)))

Theorem: ident-paramdecl-mapp-of-decl-to-ident-paramdecl-map

(defthm ident-paramdecl-mapp-of-decl-to-ident-paramdecl-map
  (b* ((map (decl-to-ident-paramdecl-map decl)))
    (ident-paramdecl-mapp map))
  :rule-classes :rewrite)