• Top
  • Documentation
  • Books
  • Boolean-reasoning
  • Projects
  • Debugging
  • Std
  • Proof-automation
  • Macro-libraries
  • ACL2
    • Theories
    • Rule-classes
    • Proof-builder
    • Recursion-and-induction
    • Hons-and-memoization
    • Events
    • Parallelism
    • History
    • Programming
      • Defun
      • Declare
      • System-utilities
      • Stobj
      • State
      • Mutual-recursion
      • Memoize
      • Mbe
      • Io
      • Defpkg
      • Apply$
      • Loop$
      • Programming-with-state
        • Error-triple
        • Cbd
        • State-global-let*
        • Last-prover-steps
        • @
        • Assign
        • Read-run-time
        • Canonical-pathname
        • F-put-global
        • Unsound-eval
        • Setenv$
        • Er-progn
        • Read-ACL2-oracle
        • With-live-state
        • F-get-global
        • Getenv$
        • Pprogn
        • Get-real-time
        • Makunbound-global
        • Get-cpu-time
        • F-boundp-global
        • Probe-file
      • Arrays
      • Characters
      • Time$
      • Loop$-primer
      • Fast-alists
      • Defconst
      • Defmacro
      • Evaluation
      • Guard
      • Equality-variants
      • Compilation
      • Hons
      • ACL2-built-ins
      • Developers-guide
      • System-attachments
      • Advanced-features
      • Set-check-invariant-risk
      • Numbers
      • Irrelevant-formals
      • Efficiency
      • Introduction-to-programming-in-ACL2-for-those-who-know-lisp
      • Redefining-programs
      • Lists
      • Invariant-risk
      • Errors
      • Defabbrev
      • Conses
      • Alists
      • Set-register-invariant-risk
      • Strings
      • Program-wrapper
      • Get-internal-time
      • Basics
      • Packages
      • Oracle-eval
      • Defmacro-untouchable
      • Primitive
      • <<
      • Revert-world
      • Unmemoize
      • Set-duplicate-keys-action
      • Symbols
      • Def-list-constructor
      • Easy-simplify-term
      • Defiteration
      • Fake-oracle-eval
      • Defopen
      • Sleep
    • Operational-semantics
    • Real
    • Start-here
    • Debugging
    • Miscellaneous
    • Output-controls
    • Macros
    • Interfacing-tools
  • Interfacing-tools
  • Hardware-verification
  • Software-verification
  • Math
  • Testing-utilities

• Io
• Programming-with-state

Probe-file

Determine whether a file exists

ACL2 does not directly support the Common Lisp function, probe-file, which indicates whether or not a given file exists. But see canonical-pathname and see file-write-date$ for ways to check in ACL2 whether a file exists.