• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Projects
  • Debugging
  • Std
  • Proof-automation
  • Macro-libraries
  • ACL2
  • Interfacing-tools
  • Hardware-verification
    • Gl
    • Esim
    • Vl2014
      • Warnings
      • Primitives
      • Use-set
      • Syntax
      • Getting-started
      • Utilities
      • Loader
        • Preprocessor
        • Vl-loadconfig
        • Lexer
        • Vl-loadstate
        • Parser
          • Parse-expressions
            • Vl-parse-parameter-value-assignment-hack
            • Vl-erange-p
            • Vl-mixed-binop-list-p
            • Vl-parse-very-simple-type
            • Vl-mark-as-explicit-parens
            • Vl-parse-0+-scope-prefixes
            • Vl-parse-0+-attribute-instances
            • Vl-parse-op
            • Vl-parse-hierarchical-identifier
            • Vl-parse-pva-tail
            • Vl-parse-expression-top
            • Vl-parse-any-sort-of-concatenation
            • Vl-build-indexing-nest
            • Vl-erangetypelist-p
            • Vl-build-range-select-with
            • Vl-build-range-select
            • Vl-parse-simple-type
            • Vl-expr-has-any-atts-p
            • Vl-left-associate-mixed-binop-list
            • Vl-tack-scopes-onto-hid
            • Vl-parse-op-alist-p
            • Vl-make-guts-from-inttoken
            • Vl-parse-range-expression
            • Vl-parse-slice-size
            • Vl-parse-concatenation
            • Vl-parse-stream-expression
            • Vl-parse-1+-stream-expressions-separated-by-commas
            • Vl-parse-stream-concatenation
            • Vl-parse-primary
            • Vl-parse-0+-bracketed-expressions
            • Vl-parse-system-function-call
            • Vl-parse-shift-expression-aux
            • Vl-parse-power-expression-aux
            • Vl-parse-mult-expression-aux
            • Vl-parse-mintypmax-expression
            • Vl-parse-logor-expression-aux
            • Vl-parse-logand-expression-aux
            • Vl-parse-indexed-id-2012
            • Vl-parse-indexed-id-2005
            • Vl-parse-equality-expression-aux
            • Vl-parse-equality-expression
            • Vl-parse-compare-expression-aux
            • Vl-parse-bitxor-expression-aux
            • Vl-parse-bitor-expression-aux
            • Vl-parse-bitand-expression-aux
            • Vl-parse-1+-open-value-ranges
            • Vl-parse-1+-keyval-expression-pairs
            • Vl-parse-unary-expression
            • Vl-parse-shift-expression
            • Vl-parse-qmark-expression
            • Vl-parse-primary-main
            • Vl-parse-primary-cast
            • Vl-parse-power-expression
            • Vl-parse-open-value-range
            • Vl-parse-nonprimary-cast
            • Vl-parse-mult-expression
            • Vl-parse-logor-expression
            • Vl-parse-logand-expression
            • Vl-parse-indexed-id
            • Vl-parse-impl-expression
            • Vl-parse-function-call
            • Vl-parse-expression
            • Vl-parse-compare-expression
            • Vl-parse-bitxor-expression
            • Vl-parse-bitor-expression
            • Vl-parse-bitand-expression
            • Vl-parse-assignment-pattern
            • Vl-parse-add-expression-aux
            • Vl-parse-add-expression
            • Vl-parse-1+-expressions-separated-by-commas
          • Parse-udps
          • Vl-genelements
          • Parse-paramdecls
          • Parse-blockitems
          • Parse-utils
          • Parse-insts
          • Parse-datatype
          • Parse-functions
          • Parse-datatypes
          • Parse-strengths
          • Vl-parse-genvar-declaration
          • Vl-parse
          • Parse-ports
          • Seq
          • Parse-packages
        • Vl-load-merge-descriptions
        • Scope-of-defines
        • Vl-load-file
        • Vl-flush-out-descriptions
        • Vl-description
        • Vl-loadresult
        • Vl-read-file
        • Vl-find-basename/extension
        • Vl-find-file
        • Vl-read-files
        • Extended-characters
        • Vl-load
        • Vl-load-main
        • Vl-load-description
        • Vl-descriptions-left-to-load
        • Inject-warnings
        • Vl-load-descriptions
        • Vl-load-files
        • Vl-load-summary
        • Vl-collect-modules-from-descriptions
        • Vl-descriptionlist
      • Transforms
      • Lint
      • Mlib
      • Server
      • Kit
      • Printer
      • Esim-vl
      • Well-formedness
    • Sv
    • Vwsim
    • Fgl
    • Vl
    • X86isa
    • Svl
    • Rtl
  • Software-verification
  • Math
  • Testing-utilities

• Parse-expressions

Vl-parse-op

Compatible with seq. Match any of the tokens specified in this alist, and return the corresponding vl-op-p for it.

Signature

(vl-parse-op arity alist &key (tokstream 'tokstream) 
             (config 'config)) 
 
  → 
(mv errmsg? value new-tokstream)

Arguments

config — Guard (vl-loadconfig-p config).

This helps to avoid many case splits throughout our operator parsing functions.

Definitions and Theorems

Function: vl-parse-op-fn

(defun vl-parse-op-fn (arity alist tokstream config)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard (vl-loadconfig-p config)))
  (declare (ignorable config))
  (declare (xargs :guard (and (maybe-natp arity)
                              (vl-parse-op-alist-p arity alist))))
  (let ((__function__ 'vl-parse-op))
    (declare (ignorable __function__))
    (seq tokstream
         (when (or (atom (vl-tokstream->tokens))
                   (atom alist))
               (return nil))
         (when (vl-is-token? (caar alist))
               (:= (vl-match))
               (return (cdar alist)))
         (return-raw (vl-parse-op arity (cdr alist))))))

Theorem: vl-parse-op-never-fails

(defthm vl-parse-op-never-fails
  (not (mv-nth 0 (vl-parse-op arity alist))))

Theorem: vl-parse-op-result

(defthm vl-parse-op-result
 (implies
      (and (not (mv-nth 0 (vl-parse-op arity alist)))
           (and (and (force (maybe-natp arity))
                     (force (vl-parse-op-alist-p arity alist)))))
      (and (equal (vl-op-p (mv-nth 1 (vl-parse-op arity alist)))
                  (if (mv-nth 1 (vl-parse-op arity alist))
                      t
                    nil))
           (equal (vl-op-arity (mv-nth 1 (vl-parse-op arity alist)))
                  (if (mv-nth 1 (vl-parse-op arity alist))
                      arity
                    (vl-op-arity nil))))))

Theorem: vl-parse-op-count-strong-on-value

(defthm vl-parse-op-count-strong-on-value
 (and
   (<= (vl-tokstream-measure
            :tokstream (mv-nth 2 (vl-parse-op arity alist)))
       (vl-tokstream-measure))
   (implies (mv-nth 1 (vl-parse-op arity alist))
            (< (vl-tokstream-measure
                    :tokstream (mv-nth 2 (vl-parse-op arity alist)))
               (vl-tokstream-measure))))
 :rule-classes ((:rewrite) (:linear)))

Theorem: vl-parse-op-when-atom

(defthm vl-parse-op-when-atom
  (implies (atom (vl-tokstream->tokens))
           (not (mv-nth 1 (vl-parse-op arity alist)))))

Theorem: vl-parse-op-eof-helper

(defthm vl-parse-op-eof-helper
  (b* (((mv ?err ?val new-tokstream)
        (vl-parse-op arity alist
                     :tokstream tokstream)))
    (implies (consp (vl-tokstream->tokens :tokstream new-tokstream))
             (consp (vl-tokstream->tokens))))
  :rule-classes
  ((:forward-chaining :trigger-terms ((vl-parse-op arity alist)))))