Removed all support for Emacs-18:
Removed autoload for `backquote'. Removed arglist specifications for `documentation' and `fset'. (ad-emacs19-p, ad-use-jwz-compiler): Removed these variables. (ad-lemacs-p, ad-v19-compiled-p, ad-subr-arglist, ad-make-advised-docstring): Removed reference to `ad-emacs19-p'. (ad-compiled-p): Renamed from `ad-v19-compiled-p'. Removed old definition of `ad-compiled-p'. (ad-compiled-code): Renamed from `ad-v19-compiled-code'. (ad-arglists, ad-docstring, ad-interactive-form): Use new names. (ad-body-forms): Always return nil for compiled definitions. (ad-compile-function): Simplified, because the v19 incarnation of `byte-compile' can compile macros. (ad-real-byte-codify): Removed. (ad-execute-defadvices): Removed. The `defadvice's it contained are now at the top level. (ad-advised-byte-code-definition): Renamed to `ad-advised-byte-code' and removed the definition of `ad-advised-byte-code' via `fset'. (ad-advised-byte-code-definition, ad-recover-byte-code, ad-stop-advice, ad-recover-normality): Removed `ad-real-byte-codify'-cation of their definitions. (ad-adjust-stack-sizes): Removed. (ad-enable-definition-hooks, ad-disable-definition-hooks): Removed v19 conditionalization. Fixed the problematic interaction between the byte-compiler and Advice when `ad-activate-on-definition' was t which resulted in erroneous compilation of nested `defun/defmacro's: (byte-compile-from-buffer, byte-compile-top-level): Advised to temporarily deactivate the advice of `defun/defmacro'. (ad-advised-definers, ad-advised-byte-compilers): New variables. (ad-enable-definition-hooks, ad-disable-definition-hooks): En/disable the advised byte-compiler entry points. (defadvice): Implement a `freeze' option which expands the `defadvice' into a redefining and dumpable `defun/defmacro' whose documentation can be written to the `DOC' file. Frozen advices cannot be undone, hence, they do not need any Advice runtime support. (ad-defadvice-flags): Add `freeze' flag. (ad-make-advised-docstring, ad-make-single-advice-docstring): New STYLE option for `plain' and `freeze' styles. Slightly changed the default formatting of advised docstrings. (ad-make-plain-docstring, ad-make-freeze-docstring): New functions. (ad-recover-all, ad-scan-byte-code-for-fsets): Removed unused condition variable `ignore-errors'. (ad-save-real-definition): New macro to save real definitions of functions used by Advice. Use `ad-save-real-definition' to save definitions of `fset', `byte-code' and now also `documentation'. (ad-subr-arglist, ad-docstring, ad-make-advised-docstring): Use `ad-real-documentation' to avoid interference with the advised version of `documentation'. (ad-execute-defadvices): Copy advice infos. (ad-start-advice-on-load): Default changed to t.
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