(elint): New custom group.
(elint-log-buffer): Make it a defcustom. (elint-scan-preloaded, elint-ignored-warnings) (elint-directory-skip-re): New options. (elint-builtin-variables): Doc fix. (elint-preloaded-env): New variable. (elint-unknown-builtin-args): Add an entry for encode-time. (elint-extra-errors): Make it a variable rather than a constant. (elint-preloaded-skip-re): New constant. (elint-directory): Skip files matching elint-directory-skip-re. (elint-features): New variable, local to linted buffers. (elint-update-env): Initialize elint-features. Possibly add elint-preloaded-env to the buffer's environment. (elint-get-top-forms): Bind elint-current-pos, for log messages. Skip quoted forms. (elint-init-form): New function, extracted from elint-init-env. Make non-list forms a warning rather than an error. Add the mode-map for define-derived-mode. Handle define-minor-mode, easy-menu-define, put that adds an error-condition, and provide. When requiring cl, also require cl-macs. Really require cl, to handle some cl macros. Store required libraries in the list elint-features, so as not to re-load them. Treat cc-require like require. (elint-init-env): Call elint-init-form to do the work. Handle eval-and-compile and such like. (elint-add-required-env): Do not clear messages. (elint-special-forms): Add handlers for function, defalias, if, when, unless, and, or. (elint-form): Add optional argument to ignore elint-special-forms, useful to prevent recursive calls from handlers. Doc fix. Respect elint-ignored-warnings. (elint-form): Respect elint-ignored-warnings. (elint-bound-variable, elint-bound-function): New variables. (elint-unbound-variable): Respect elint-bound-variable. (elint-get-args): Respect elint-bound-function. (elint-check-cond-form): Add some simple handling for (f)boundp and featurep tests. (elint-check-defalias-form): New handler. (elint-check-let-form): Make an empty let a warning rather than an error. (elint-check-setq-form): Make an empty setq a warning rather than an error. Respect elint-ignored-warnings. (elint-check-defvar-form): Accept null doc-strings. (elint-check-conditional-form): New handler. Does some simple-minded checking of featurep and (f)boundp tests. (elint-put-function-args): New function. (elint-initialize): Use elint-scan-doc-file rather than elint-find-builtin-variables. Use elint-put-function-args. Possibly scan preloaded-file-list. (elint-scan-doc-file): Rename from elint-find-builtin-variables and extend to handle functions as well.
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