pax_global_header00006660000000000000000000000064150553375050014522gustar00rootroot0000000000000052 comment=ec1d4ef02f5572fc5aff3f62d3e7ef791f444456 llama-1.0.1/000077500000000000000000000000001505533750500126075ustar00rootroot00000000000000llama-1.0.1/.dir-locals.el000066400000000000000000000002271505533750500152410ustar00rootroot00000000000000((nil (indent-tabs-mode . nil)) (makefile-mode (indent-tabs-mode . t)) (git-commit-mode (git-commit-major-mode . git-commit-elisp-text-mode))) llama-1.0.1/.elpaignore000066400000000000000000000001161505533750500147330ustar00rootroot00000000000000.dir-locals.el .elpaignore .github .gitignore LICENSE Makefile llama-tests.el llama-1.0.1/.github/000077500000000000000000000000001505533750500141475ustar00rootroot00000000000000llama-1.0.1/.github/workflows/000077500000000000000000000000001505533750500162045ustar00rootroot00000000000000llama-1.0.1/.github/workflows/compile.yml000066400000000000000000000002211505533750500203520ustar00rootroot00000000000000name: Compile on: [push, pull_request] jobs: compile: name: Compile uses: emacscollective/workflows/.github/workflows/compile.yml@main llama-1.0.1/.github/workflows/test.yml000066400000000000000000000002051505533750500177030ustar00rootroot00000000000000name: Test on: [push, pull_request] jobs: test: name: Test uses: emacscollective/workflows/.github/workflows/test.yml@main llama-1.0.1/.gitignore000066400000000000000000000000551505533750500145770ustar00rootroot00000000000000/*.elc /*-autoloads.el /*-pkg.el /.config.mk llama-1.0.1/LICENSE000066400000000000000000001045151505533750500136220ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU General Public License is a free, copyleft license for software and other kinds of works. The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 17. Interpretation of Sections 15 and 16. If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode: Copyright (C) This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see . The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read . llama-1.0.1/Makefile000066400000000000000000000036061505533750500142540ustar00rootroot00000000000000-include .config.mk PKG = llama ELS = $(PKG).el ELS += $(PKG)-tests.el ELCS = $(ELS:.el=.elc) $(PKG).elc: $(PKG)-tests.elc: $(PKG).elc DEPS = compat EMACS ?= emacs EMACS_ARGS ?= --eval "(progn \ (put 'if-let 'byte-obsolete-info nil) \ (put 'when-let 'byte-obsolete-info nil))" LOAD_PATH ?= $(addprefix -L ../,$(DEPS)) LOAD_PATH += -L . all: lisp help: $(info make all - generate byte-code and autoloads) $(info make lisp - generate byte-code and autoloads) $(info make redo - re-generate byte-code and autoloads) $(info make test - run tests) $(info make clean - remove generated files) @printf "\n" redo: clean lisp lisp: $(ELCS) loaddefs check-declare loaddefs: $(PKG)-autoloads.el %.elc: %.el @printf "Compiling $<\n" @$(EMACS) -Q --batch $(EMACS_ARGS) $(LOAD_PATH) -f batch-byte-compile $< check-declare: @printf " Checking function declarations\n" @$(EMACS) -Q --batch $(EMACS_ARGS) $(LOAD_PATH) \ --eval "(check-declare-directory default-directory)" test: lisp @$(EMACS) -Q --batch $(EMACS_ARGS) $(LOAD_PATH) \ -l ert -l $(PKG)-tests.el -f ert-run-tests-batch-and-exit CLEAN = $(ELCS) $(PKG)-autoloads.el clean: @printf " Cleaning...\n" @rm -rf $(CLEAN) $(PKG)-autoloads.el: $(ELS) @printf " Creating $@\n" @$(EMACS) -Q --batch -l autoload -l cl-lib --eval "\ (let ((file (expand-file-name \"$@\"))\ (autoload-timestamps nil) \ (backup-inhibited t)\ (version-control 'never)\ (coding-system-for-write 'utf-8-emacs-unix))\ (write-region (autoload-rubric file \"package\" nil) nil file nil 'silent)\ (cl-letf (((symbol-function 'progress-reporter-do-update) (lambda (&rest _)))\ ((symbol-function 'progress-reporter-done) (lambda (_))))\ (let ((generated-autoload-file file))\ (update-directory-autoloads default-directory))))" \ 2>&1 | sed "/^Package autoload is deprecated$$/d" llama-1.0.1/README.org000066400000000000000000000042651505533750500142640ustar00rootroot00000000000000* Llama — Compact syntax for short lambda This package implements a macro named ~##~, which provides a compact way to write short ~lambda~ expressions. The signature of the macro is ~(## FN &rest BODY)~ and it expands to a ~lambda~ expression, which calls the function ~FN~ with the arguments ~BODY~ and returns the value of that. The arguments of the ~lambda~ expression are derived from symbols found in ~BODY~. Each symbol from ~%1~ through ~%9~, which appears in an unquoted part of ~BODY~, specifies a mandatory argument. Each symbol from ~&1~ through ~&9~, which appears in an unquoted part of ~BODY~, specifies an optional argument. The symbol ~&*~ specifies extra (~&rest~) arguments. The shorter symbol ~%~ can be used instead of ~%1~, but using both in the same expression is not allowed. Likewise ~&~ can be used instead of ~&1~. These shorthands are not recognized in function position. To support binding forms that use a vector as ~VARLIST~ (such as ~-let~ from the ~dash~ package), argument symbols are also detected inside of vectors. The space between ~##~ and ~FN~ can be omitted because ~##~ is read-syntax for the symbol whose name is the empty string. If you prefer you can place a space there anyway, and if you prefer to not use this somewhat magical symbol at all, you can instead use the alternative name ~llama~. Instead of: #+begin_src emacs-lisp (lambda (a &optional _ c &rest d) (foo a (bar c) d)) #+end_src you can use this macro and write: #+begin_src emacs-lisp (##foo %1 (bar &3) &*) #+end_src which expands to: #+begin_src emacs-lisp (lambda (%1 &optional _&2 &3 &rest &*) (foo %1 (bar &3) &*)) #+end_src Unused trailing arguments and mandatory unused arguments at the border between mandatory and optional arguments are also supported: #+begin_src emacs-lisp (##list %1 _%3 &5 _&6) #+end_src becomes: #+begin_src emacs-lisp (lambda (%1 _%2 _%3 &optional _&4 &5 _&6) (list %1 &5)) #+end_src Note how ~_%3~ and ~_&6~ are removed from the body, because their names begin with an underscore. Also note that ~_&4~ is optional, unlike the explicitly specified ~_%3~. Consider enabling ~llama-fontify-mode~ to highlight ~##~ and its special arguments. llama-1.0.1/llama-tests.el000066400000000000000000000401261505533750500153620ustar00rootroot00000000000000;;; llama-tests.el --- Tests for Llama -*- lexical-binding:t -*- ;; Copyright (C) 2020-2025 Jonas Bernoulli ;; Authors: Jonas Bernoulli ;; Homepage: https://github.com/tarsius/llama ;; SPDX-License-Identifier: GPL-3.0-or-later ;; This file is free software: you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published ;; by the Free Software Foundation, either version 3 of the License, ;; or (at your option) any later version. ;; ;; This file is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; ;; You should have received a copy of the GNU General Public License ;; along with this file. If not, see . ;;; Code: (require 'llama) (ert-deftest llama-test-101-basic nil (should (equal (##list %1) (lambda (%1) (list %1)))) (should (equal (##list %1 %1) (lambda (%1) (list %1 %1)))) (should (equal (##list %1 %2) (lambda (%1 %2) (list %1 %2)))) (should (equal (##list %2 %1) (lambda (%1 %2) (list %2 %1)))) (should (equal (##list 'const %1) (lambda ( %1) (list 'const %1)))) (should (equal (##list %1 'const) (lambda (%1) (list %1 'const)))) (should (equal (##list %1 'const %2) (lambda (%1 %2) (list %1 'const %2)))) (should (equal (##list %2 'const %1) (lambda (%1 %2) (list %2 'const %1)))) (should (equal (##list %1 %2 %3 %4 %5 %6 %7 %8 %9) (lambda (%1 %2 %3 %4 %5 %6 %7 %8 %9) (list %1 %2 %3 %4 %5 %6 %7 %8 %9)))) (should (equal (##list %1 %2 %1 %3 %5 %4 %6 %7 %9 %8) (lambda (%1 %2 %3 %4 %5 %6 %7 %8 %9) (list %1 %2 %1 %3 %5 %4 %6 %7 %9 %8)))) ) (ert-deftest llama-test-102-basic-optional nil (should (equal (##list &1) (lambda (&optional &1) (list &1)))) (should (equal (##list %1 &2) (lambda (%1 &optional &2) (list %1 &2)))) (should (equal (##list %2 %1 &4 &3) (lambda ( %1 %2 &optional &3 &4) (list %2 %1 &4 &3)))) ) (ert-deftest llama-test-103-basic-rest nil (should (equal (##list &*) (lambda (&rest &*) (list &*)))) (should (equal (##list %1 &*) (lambda (%1 &rest &*) (list %1 &*)))) (should (equal (##list %1 &2 &*) (lambda (%1 &optional &2 &rest &*) (list %1 &2 &*)))) ) (ert-deftest llama-test-104-basic-nested nil (should (equal (##list (##list %) %1) (lambda (%1) (list (lambda (%) (list %)) %1)))) ) (ert-deftest llama-test-105-basic-nil nil (should (equal (##list (##list %) %1) (lambda (%1) (list (lambda (%) (list %)) %1)))) ) (ert-deftest llama-test-201-unused-implicit-mandatory nil (should (equal (##list %2) (lambda (_%1 %2) (list %2)))) (should (equal (##list %2 %3) (lambda (_%1 %2 %3) (list %2 %3)))) (should (equal (##list %3) (lambda (_%1 _%2 %3) (list %3)))) (should (equal (##list %1 %3) (lambda (%1 _%2 %3) (list %1 %3)))) (should (equal (##list %3 %6) (lambda (_%1 _%2 %3 _%4 _%5 %6) (list %3 %6)))) ) (ert-deftest llama-test-202-unused-implicit-optional nil (should (equal (##list &2) (lambda (&optional _&1 &2) (list &2)))) (should (equal (##list &2 &3) (lambda (&optional _&1 &2 &3) (list &2 &3)))) (should (equal (##list &3) (lambda (&optional _&1 _&2 &3) (list &3)))) (should (equal (##list &1 &3) (lambda (&optional &1 _&2 &3) (list &1 &3)))) (should (equal (##list &3 &6) (lambda (&optional _&1 _&2 &3 _&4 _&5 &6) (list &3 &6)))) ) (ert-deftest llama-test-203-unused-implicit-mixed nil (should (equal (##list %1 &3) (lambda (%1 &optional _&2 &3) (list %1 &3)))) (should (equal (##list %1 &4) (lambda (%1 &optional _&2 _&3 &4) (list %1 &4)))) (should (equal (##list %1 %2 &4) (lambda (%1 %2 &optional _&3 &4) (list %1 %2 &4)))) (should (equal (##list %2 &4 &6) (lambda (_%1 %2 &optional _&3 &4 _&5 &6) (list %2 &4 &6)))) ) (ert-deftest llama-test-301-unused-explicit-trailing nil (should (equal (##list _%1) (lambda (_%1) (list)))) (should (equal (##list _%2) (lambda (_%1 _%2) (list)))) (should (equal (##list %1 _%2) (lambda (%1 _%2) (list %1)))) (should (equal (##list %1 _%3) (lambda (%1 _%2 _%3) (list %1)))) ) (ert-deftest llama-test-302-unused-explicit-border nil (should (equal (##list _%1 &2) (lambda (_%1 &optional &2) (list &2)))) (should (equal (##list _%2 &3) (lambda (_%1 _%2 &optional &3) (list &3)))) (should (equal (##list %1 _%2 &3) (lambda (%1 _%2 &optional &3) (list %1 &3)))) (should (equal (##list %1 _%2 &4) (lambda (%1 _%2 &optional _&3 &4) (list %1 &4)))) (should (equal (##list %1 _%3 &6) (lambda (%1 _%2 _%3 &optional _&4 _&5 &6) (list %1 &6)))) ) (ert-deftest llama-test-303-unused-redundant nil (should (equal (##list _%1 %2) (lambda (_%1 %2) (list %2)))) (should (equal (##list _&1 &2) (lambda (&optional _&1 &2) (list &2)))) ) (ert-deftest llama-test-401-abbrev nil ;; llama-test-101-basic(s/%1/%/) (should (equal (##list %) (lambda (%) (list %)))) (should (equal (##list % %) (lambda (%) (list % %)))) (should (equal (##list % %2) (lambda (% %2) (list % %2)))) (should (equal (##list %2 %) (lambda (% %2) (list %2 %)))) (should (equal (##list 'const %) (lambda ( %) (list 'const %)))) (should (equal (##list % 'const) (lambda (%) (list % 'const)))) (should (equal (##list % 'const %2) (lambda (% %2) (list % 'const %2)))) (should (equal (##list %2 'const %) (lambda (% %2) (list %2 'const %)))) (should (equal (##list % %2 %3 %4 %5 %6 %7 %8 %9) (lambda (% %2 %3 %4 %5 %6 %7 %8 %9) (list % %2 %3 %4 %5 %6 %7 %8 %9)))) (should (equal (##list % %2 % %3 %5 %4 %6 %7 %9 %8) (lambda (% %2 %3 %4 %5 %6 %7 %8 %9) (list % %2 % %3 %5 %4 %6 %7 %9 %8)))) ) (ert-deftest llama-test-402-abbrev-optional nil ;; llama-test-102-basic-optional(s/&1/&/) (should (equal (##list &1) (lambda (&optional &1) (list &1)))) (should (equal (##list % &2) (lambda (% &optional &2) (list % &2)))) (should (equal (##list %2 % &4 &3) (lambda ( % %2 &optional &3 &4) (list %2 % &4 &3)))) ) (ert-deftest llama-test-501-function-position nil (should (equal (##+ (% %2 2) %1) (lambda (%1 %2) (+ (% %2 2) %1)))) (should (equal (##+ (* %2 2) %) (lambda (% %2) (+ (* %2 2) %)))) (should (equal (##% %2 2) (lambda (_%1 %2) (% %2 2)))) (should (equal (##* %1 2) (lambda (%1) (* %1 2)))) (should (equal (##% %2 %1) (lambda (%1 %2) (% %2 %1)))) ) (defmacro llama-test--flatten (expr) (when (vectorp expr) (setq expr (mapcan (lambda (e) (if (vectorp e) (append e ()) (list e))) (append expr ())))) (let ((body ())) (while expr (if (listp expr) (push (pop expr) body) (push expr body) (setq expr nil))) (cons 'list (nreverse body)))) (ert-deftest llama-test-502-vector nil ;; Real world example: (##-let [val %1] ...). (should (equal (##llama-test--flatten [[1 %1]]) (lambda (%1) (llama-test--flatten [[1 %1]])))) (should (equal (##llama-test--flatten [%2 [%1]]) (lambda (%1 %2) (llama-test--flatten [%2 [%1]])))) (should (equal (##llama-test--flatten [%1 _%2 %3]) (lambda (%1 _%2 %3) (llama-test--flatten [%1 %3])))) ) (ert-deftest llama-test-502-dotted nil ;; Real world example: ???. (should (equal (##llama-test--flatten (%1 . %2)) (lambda (%1 %2) (llama-test--flatten (%1 . %2))))) (should (equal (##llama-test--flatten (%1 %2 . %3)) (lambda (%1 %2 %3) (llama-test--flatten (%1 %2 . %3))))) (should (equal (##llama-test--flatten (%1 _%2 . %3)) (lambda (%1 _%2 %3) (llama-test--flatten (%1 . %3))))) (should (equal (##llama-test--flatten (%1 _%2 %3 . %4)) (lambda (%1 _%2 %3 %4) (llama-test--flatten (%1 %3 . %4))))) ) (ert-deftest llama-test-503-quoted nil (should (equal (##cons %1 '(%2)) (lambda (%1) (cons %1 '(%2))))) ) (ert-deftest llama-test-504-backquoted nil (should (equal (##list `(,%1 %2 ,%3)) (lambda (%1 _%2 %3) (list `(,%1 %2 ,%3))))) (should (equal (##list `(,%1 %2 (,%3) ,%4 . ,%5)) (lambda (%1 _%2 %3 %4 %5) (list `(,%1 %2 (,%3) ,%4 . ,%5))))) (should (equal (##`(,%1 %2 ,%3)) (lambda (%1 _%2 %3) `(,%1 %2 ,%3)))) (should (equal (##`(,%1 %2 (,%3) ,%4 . ,%5)) (lambda (%1 _%2 %3 %4 %5) `(,%1 %2 (,%3) ,%4 . ,%5)))) (should (equal (##list `(,% ,@% %)) (lambda (%) (list `(,% ,@% %))))) (should (equal (##list `(% ,%2)) (lambda (_%1 %2) (list `(% ,%2))))) (should (equal (##list `(,@%1 %2 ,%3 (,@%3 ,%1))) (lambda (%1 _%2 %3) (list `(,@%1 %2 ,%3 (,@%3 ,%1)))))) ) (ert-deftest llama-test-701-llama nil (should (equal (llama list %1) (lambda (%1) (list %1)))) (should (equal (llama list %1 %1) (lambda (%1) (list %1 %1)))) (should (equal (llama list %1 %2) (lambda (%1 %2) (list %1 %2)))) (should (equal (llama list %1 (llama list %)) (lambda (%1) (list %1 (lambda (%) (list %)))))) ) (ert-deftest llama-test-901-errors-first nil (should-error (##list %1 &1)) (should-error (##list &1 %1)) (should-error (##list %1 _%1)) (should-error (##list _%1 %1)) (should-error (##list %1 _&1)) (should-error (##list _&1 %1)) (should-error (##list %1 %1 &1)) ) (ert-deftest llama-test-801-ambiguity nil ;; We cannot know how every special form and macro uses its arguments, ;; and can therefore not always do the right thing™. However, whatever ;; we end up doing, font-lock should agree. Here are some noteworthy ;; examples where our macro expansion and our font-lock agree, but the ;; author might have intended something else. (static-if (>= emacs-major-version 28) ; prevent compiler warnings (with-no-warnings ; unused arguments ;; A good example of what we might not want and theoretically could ;; prevent. However, this can also be prevented by just not going ;; out of our way to wander into ambiguous territory. While not ;; impossible, it is unlikely that someone does this accidentally. (should (equal (##setq % 1) (lambda (%) (setq % 1)))) ;; We have to fake `-setq' because we don't want to depend on `dash' ;; and because (equal (lambda () (-setq a 1)) (lambda () (-setq a 1))) ;; is never true because `-setq' uses `make-symbol'. Mocking that ;; macro does *not* affect the expansion of `##' into a `lambda'. (cl-macrolet ((-setq (&rest args) `'(,@args))) (should (equal (##-setq % 1) (lambda (%) (-setq % 1)))) (should (equal (##-setq (%) '(1)) (lambda () (-setq (%) '(1))))) (should (equal (##-setq [(%)] [(1)]) (lambda () (-setq [(%)] [(1)])))) (should (equal (##-setq [(% %)] [(1 2)]) (lambda (%) (-setq [(% %)] [(1 2)])))) (should (equal (##-setq [(%1)] [(1)]) (lambda (%1) (-setq [(%1)] [(1)])))))) )) (ert-deftest llama-test-902-errors-second nil (should-error (##list %2 &2)) (should-error (##list &2 %2)) (should-error (##list %2 _%2)) (should-error (##list _%2 %2)) (should-error (##list %2 _&2)) (should-error (##list _&2 %2)) (should-error (##list %2 %2 &2)) ) (ert-deftest llama-test-903-errors-abbrev nil (should-error (##list % &)) (should-error (##list & %)) (should-error (##list % _%)) (should-error (##list _% %)) (should-error (##list % _&)) (should-error (##list _& %)) (should-error (##list % % &)) (should-error (##list % %1)) (should-error (##list % _%1)) (should-error (##list % &1)) (should-error (##list % _&1)) (should-error (##list %1 %)) ) (ert-deftest llama-test-904-errors-syntax nil ;; ((lambda (%) (+ 1 %)) 2) ;; results in ;; Warning: Use of deprecated ((lambda (%) ...) ...) form ;; but works. ;; ((##+ 1 %) 2) ;; results at compile-time in ;; Warning: Malformed function ‘(## + 1 %)’ ;; results at run-time in ;; Error: invalid-function ((## + 1 %)) ;; and cannot possibly work. ;; Delay macro-expansion for demonstration purposes. (should-error (eval '((##+ 1 %) 2))) ;; This is what one should be doing instead. (should (equal (funcall (lambda (%) (+ 1 %)) 2) 3)) (should (equal (funcall (## + 1 %) 2) 3)) ) ;; Local Variables: ;; eval: (prettify-symbols-mode -1) ;; indent-tabs-mode: nil ;; End: ;;; llama-tests.el ends here llama-1.0.1/llama.el000066400000000000000000000532551505533750500142310ustar00rootroot00000000000000;;; llama.el --- Compact syntax for short lambda -*- lexical-binding:t -*- ;; Copyright (C) 2020-2025 Jonas Bernoulli ;; Authors: Jonas Bernoulli ;; Homepage: https://github.com/tarsius/llama ;; Keywords: extensions ;; Package-Version: 1.0.1 ;; Package-Requires: ((emacs "26.1") (compat "30.1")) ;; SPDX-License-Identifier: GPL-3.0-or-later ;; This file is free software: you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published ;; by the Free Software Foundation, either version 3 of the License, ;; or (at your option) any later version. ;; ;; This file is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; ;; You should have received a copy of the GNU General Public License ;; along with this file. If not, see . ;;; Commentary: ;; This package implements a macro named `##', which provides a compact way ;; to write short `lambda' expressions. ;; The signature of the macro is (## FN &rest BODY) and it expands to a ;; `lambda' expression, which calls the function FN with the arguments BODY ;; and returns the value of that. The arguments of the `lambda' expression ;; are derived from symbols found in BODY. ;; Each symbol from `%1' through `%9', which appears in an unquoted part ;; of BODY, specifies a mandatory argument. Each symbol from `&1' through ;; `&9', which appears in an unquoted part of BODY, specifies an optional ;; argument. The symbol `&*' specifies extra (`&rest') arguments. ;; The shorter symbol `%' can be used instead of `%1', but using both in ;; the same expression is not allowed. Likewise `&' can be used instead ;; of `&1'. These shorthands are not recognized in function position. ;; To support binding forms that use a vector as VARLIST (such as `-let' ;; from the `dash' package), argument symbols are also detected inside of ;; vectors. ;; The space between `##' and FN can be omitted because `##' is read-syntax ;; for the symbol whose name is the empty string. If you prefer you can ;; place a space there anyway, and if you prefer to not use this somewhat ;; magical symbol at all, you can instead use the alternative name `llama'. ;; Instead of: ;; ;; (lambda (a &optional _ c &rest d) ;; (foo a (bar c) d)) ;; ;; you can use this macro and write: ;; ;; (##foo %1 (bar &3) &*) ;; ;; which expands to: ;; ;; (lambda (%1 &optional _&2 &3 &rest &*) ;; (foo %1 (bar &3) &*)) ;; Unused trailing arguments and mandatory unused arguments at the border ;; between mandatory and optional arguments are also supported: ;; ;; (##list %1 _%3 &5 _&6) ;; ;; becomes: ;; ;; (lambda (%1 _%2 _%3 &optional _&4 &5 _&6) ;; (list %1 &5)) ;; ;; Note how `_%3' and `_&6' are removed from the body, because their names ;; begin with an underscore. Also note that `_&4' is optional, unlike the ;; explicitly specified `_%3'. ;; Consider enabling `llama-fontify-mode' to highlight `##' and its ;; special arguments. ;;; Code: (require 'compat) ;;;###autoload (defmacro llama (fn &rest body) "Expand to a `lambda' expression that wraps around FN and BODY. This macro provides a compact way to write short `lambda' expressions. It expands to a `lambda' expression, which calls the function FN with arguments BODY and returns its value. The arguments of the `lambda' expression are derived from symbols found in BODY. Each symbol from `%1' through `%9', which appears in an unquoted part of BODY, specifies a mandatory argument. Each symbol from `&1' through `&9', which appears in an unquoted part of BODY, specifies an optional argument. The symbol `&*' specifies extra (`&rest') arguments. The shorter symbol `%' can be used instead of `%1', but using both in the same expression is not allowed. Likewise `&' can be used instead of `&1'. These shorthands are not recognized in function position. To support binding forms that use a vector as VARLIST (such as `-let' from the `dash' package), argument symbols are also detected inside of vectors. The space between `##' and FN can be omitted because `##' is read-syntax for the symbol whose name is the empty string. If you prefer you can place a space there anyway, and if you prefer to not use this somewhat magical symbol at all, you can instead use the alternative name `llama'. Instead of: (lambda (a &optional _ c &rest d) (foo a (bar c) d)) you can use this macro and write: (##foo %1 (bar &3) &*) which expands to: (lambda (%1 &optional _&2 &3 &rest &*) (foo %1 (bar &3) &*)) Unused trailing arguments and mandatory unused arguments at the border between mandatory and optional arguments are also supported: (##list %1 _%3 &5 _&6) becomes: (lambda (%1 _%2 _%3 &optional _&4 &5 _&6) (list %1 &5)) Note how `_%3' and `_&6' are removed from the body, because their names begin with an underscore. Also note that `_&4' is optional, unlike the explicitly specified `_%3'. Consider enabling `llama-fontify-mode' to highlight `##' and its special arguments." (cond ((symbolp fn)) ((and (eq (car-safe fn) backquote-backquote-symbol) (not body)) (setq body (cdr fn)) (setq fn backquote-backquote-symbol)) ((signal 'wrong-type-argument (list 'symbolp backquote-backquote-symbol fn)))) (let* ((args (make-vector 10 nil)) (body (cdr (llama--collect (cons fn body) args))) (rest (aref args 0)) (args (nreverse (cdr (append args nil)))) (args (progn (while (and args (null (car args))) (setq args (cdr args))) args)) (pos (length args)) (opt nil) (args (mapcar (lambda (arg) (if arg (setq opt (string-match-p "\\`_?&" (symbol-name arg))) (setq arg (intern (format "_%c%s" (if opt ?& ?%) pos)))) (setq pos (1- pos)) arg) args)) (opt nil) (args (mapcar (lambda (symbol) (cond ((string-match-p "\\`_?%" (symbol-name symbol)) (when opt (error "`%s' cannot follow optional arguments" symbol)) (list symbol)) (opt (list symbol)) ((setq opt t) (list '&optional symbol)))) (nreverse args)))) `(lambda (,@(apply #'nconc args) ,@(and rest (list '&rest rest))) (,fn ,@body)))) (defalias (intern "") 'llama) (defalias '\#\# 'llama) (defconst llama--unused-argument (make-symbol "llama--unused-argument")) (defun llama--collect (expr args &optional fnpos backquoted unquote) (cond ((memq (car-safe expr) (list (intern "") 'llama 'quote)) expr) ((and backquoted (symbolp expr)) expr) ((and backquoted (memq (car-safe expr) (list backquote-unquote-symbol backquote-splice-symbol))) (list (car expr) (llama--collect (cadr expr) args nil nil t))) ((memq (car-safe expr) (list backquote-backquote-symbol backquote-splice-symbol)) (list (car expr) (llama--collect (cadr expr) args nil t))) ((symbolp expr) (let ((name (symbol-name expr))) (save-match-data (cond ((string-match "\\`\\(_\\)?[%&]\\([1-9*]\\)?\\'" name) (let* ((pos (match-string 2 name)) (pos (cond ((equal pos "*") 0) ((not pos) 1) ((string-to-number pos)))) (sym (aref args pos))) (unless (and fnpos (not unquote) (memq expr '(% &))) (when (and sym (not (equal expr sym))) (error "`%s' and `%s' are mutually exclusive" sym expr)) (aset args pos expr))) (if (match-string 1 name) llama--unused-argument expr)) (expr))))) ((or (listp expr) (vectorp expr)) (let* ((vectorp (vectorp expr)) (expr (if vectorp (append expr ()) expr)) (fnpos (and (not vectorp) (not backquoted) (ignore-errors (length expr)))) ;proper-list-p (ret ())) (catch t (while t (let ((elt (llama--collect (car expr) args fnpos backquoted))) (unless (eq elt llama--unused-argument) (push elt ret))) (setq fnpos nil) (setq expr (cdr expr)) (unless (and expr (listp expr) (not (eq (car expr) backquote-unquote-symbol))) (throw t nil)))) (setq ret (nreverse ret)) (when expr (setcdr (last ret) (llama--collect expr args nil backquoted))) (if vectorp (vconcat ret) ret))) (expr))) ;;; Completion (define-advice elisp--expect-function-p (:around (fn pos) llama) "Support function completion directly following `##'." (or (and (eq (char-before pos) ?#) (eq (char-before (- pos 1)) ?#)) (and (eq (char-before pos) ?\s) (eq (char-before (- pos 1)) ?#) (eq (char-before (- pos 2)) ?#)) (funcall fn pos))) (define-advice all-completions (:around (fn str table &rest rest) llama) "Remove empty symbol from completion results if originating from `llama'. `##' is the notation for the symbol whose name is the empty string. (intern \"\") => ## (symbol-name \\='##) => \"\" The `llama' package uses `##' as the name of a macro, which allows it to be used akin to syntax, without actually being new syntax. \(`describe-function' won't let you select `##', but because that is an alias for `llama', you can access the documentation under that name.) This advice prevents the empty string from being offered as a completion candidate when `obarray' or a completion table that internally uses that is used as TABLE." (let ((result (apply fn str table rest))) (if (and (eq obarray table) (equal str "")) (delete "" result) result))) ;;; Fontification (defgroup llama () "Compact syntax for short lambda." :group 'extensions :group 'faces :group 'lisp) (defface llama-\#\#-macro '((t :inherit font-lock-function-call-face)) "Face used for the name of the `##' macro.") (defface llama-llama-macro '((t :inherit font-lock-keyword-face)) "Face used for the name of the `llama' macro.") (defface llama-mandatory-argument '((t :inherit font-lock-variable-use-face)) "Face used for mandatory arguments `%1' through `%9' and `%'.") (defface llama-optional-argument '((t :inherit font-lock-type-face)) "Face used for optional arguments `&1' through `&9', `&' and `&*'.") (defface llama-deleted-argument `((((supports :box t)) :box ( :line-width ,(if (>= emacs-major-version 28) (cons -1 -1) -1) :color "red" :style nil)) (((supports :underline t)) :underline "red") (t :inherit font-lock-warning-face)) "Face used for deleted arguments `_%1'...`_%9', `_&1'...`_&9' and `_&*'. This face is used in addition to one of llama's other argument faces. Unlike implicit unused arguments (which do not appear in the function body), these arguments are deleted from the function body during macro expansion, and the looks of this face should hint at that.") (defconst llama-font-lock-keywords-28 '(("(\\(##\\)" 1 'llama-\#\#-macro) ("(\\(llama\\)\\_>" 1 'llama-llama-macro) ("\\_<\\(?:_?%[1-9]?\\)\\_>" 0 (llama--maybe-face 'llama-mandatory-argument)) ("\\_<\\(?:_?&[1-9*]?\\)\\_>" 0 (llama--maybe-face 'llama-optional-argument)) ("\\_<\\(?:_\\(?:%[1-9]?\\|&[1-9*]?\\)\\)\\_>" 0 'llama-deleted-argument prepend))) (defconst llama-font-lock-keywords-29 `(("\\_<\\(&[1-9*]?\\)\\_>" 1 'default) (,(apply-partially #'llama--match-and-fontify "(\\(##\\)") 1 'llama-\#\#-macro) (,(apply-partially #'llama--match-and-fontify "(\\(llama\\_>\\)") 1 'llama-llama-macro))) (defvar llama-font-lock-keywords (if (fboundp 'read-positioning-symbols) llama-font-lock-keywords-29 llama-font-lock-keywords-28)) (defun llama--maybe-face (face) (and (not (and (member (match-string 0) '("%" "&")) (and-let* ((beg (ignore-errors (scan-lists (match-beginning 0) -1 1)))) (string-match-p "\\`\\(##\\|llama\\_>\\)?[\s\t\n\r]*\\'" (buffer-substring-no-properties (1+ beg) (match-beginning 0)))))) face)) (defun llama--match-and-fontify (re end) (static-if (fboundp 'bare-symbol) (and (re-search-forward re end t) (prog1 t (save-excursion (goto-char (match-beginning 0)) (when-let ((_(save-match-data (not (nth 8 (syntax-ppss))))) (expr (ignore-errors (read-positioning-symbols (current-buffer))))) (put-text-property (match-beginning 0) (point) 'font-lock-multiline t) (llama--fontify (cdr expr) nil nil t))))) (list re end))) ; Silence compiler. (defun llama--fontify (expr &optional fnpos backquoted top) (static-if (fboundp 'bare-symbol) (cond ((null expr) expr) ((eq (car-safe expr) 'quote)) ((eq (ignore-errors (bare-symbol (car-safe expr))) 'quote)) ((and (memq (ignore-errors (bare-symbol (car-safe expr))) (list (intern "") 'llama)) (not top))) ((and backquoted (symbol-with-pos-p expr))) ((and backquoted (memq (car-safe expr) (list backquote-unquote-symbol backquote-splice-symbol))) (llama--fontify expr)) ((symbol-with-pos-p expr) (save-match-data (when-let* ((name (symbol-name (bare-symbol expr))) (face (cond ((and (string-match "\\_<\\(?:\\(_\\)?%\\([1-9]\\)?\\)\\_>" name) (or (not fnpos) (match-end 2))) 'llama-mandatory-argument) ((and (string-match "\\_<\\(?:\\(_\\)?&\\([1-9*]\\)?\\)\\_>" name) (or (not fnpos) (match-end 2))) 'llama-optional-argument)))) (when (match-end 1) (setq face (list 'llama-deleted-argument face))) (let ((beg (symbol-with-pos-pos expr))) (put-text-property beg (save-excursion (goto-char beg) (forward-symbol 1)) 'face face))))) ((or (listp expr) (vectorp expr)) (let* ((vectorp (vectorp expr)) (expr (if vectorp (append expr ()) expr)) (fnpos (and (not vectorp) (not backquoted) (ignore-errors (length expr))))) (catch t (while t (cond ((eq (car expr) backquote-backquote-symbol) (setq expr (cdr expr)) (llama--fontify (car expr) t t)) ((llama--fontify (car expr) fnpos backquoted))) (setq fnpos nil) (setq expr (cdr expr)) (unless (and expr (listp expr) (not (eq (car expr) backquote-unquote-symbol))) (throw t nil)))) (when expr (llama--fontify expr fnpos)))))) (list expr fnpos backquoted top)) ; Silence compiler. (defvar llama-fontify-mode-lighter nil) ;;;###autoload (define-minor-mode llama-fontify-mode "In Emacs Lisp mode, highlight the `##' macro and its special arguments." :lighter llama-fontify-mode-lighter :global t (cond (llama-fontify-mode (advice-add 'lisp--el-match-keyword :override #'lisp--el-match-keyword@llama '((depth . -80))) (advice-add 'elisp-mode-syntax-propertize :override #'elisp-mode-syntax-propertize@llama) (add-hook 'emacs-lisp-mode-hook #'llama--add-font-lock-keywords)) (t (advice-remove 'lisp--el-match-keyword #'lisp--el-match-keyword@llama) (advice-remove 'elisp-mode-syntax-propertize #'elisp-mode-syntax-propertize@llama) (remove-hook 'emacs-lisp-mode-hook #'llama--add-font-lock-keywords))) (dolist (buffer (buffer-list)) (with-current-buffer buffer (when (derived-mode-p 'emacs-lisp-mode) (if llama-fontify-mode (font-lock-add-keywords nil llama-font-lock-keywords) (font-lock-remove-keywords nil llama-font-lock-keywords)) (font-lock-flush))))) (defun llama--add-font-lock-keywords () (font-lock-add-keywords nil llama-font-lock-keywords)) (defun lisp--el-match-keyword@llama (limit) "Highlight symbols following \"(##\" the same as if they followed \"(\"." (catch 'found (while (re-search-forward (concat "(\\(?:## ?\\)?\\(" (static-if (get 'lisp-mode-symbol 'rx-definition) ;>= 29.1 (rx lisp-mode-symbol) lisp-mode-symbol-regexp) "\\)\\_>") limit t) (let ((sym (intern-soft (match-string 1)))) (when (and (or (special-form-p sym) (macrop sym) (and (bound-and-true-p morlock-mode) ;; Same as in advice of `morlock' package. (get sym 'morlock-font-lock-keyword))) (not (get sym 'no-font-lock-keyword)) (static-if (fboundp 'lisp--el-funcall-position-p) ;>= 28.1 (lisp--el-funcall-position-p (match-beginning 0)) (not (lisp--el-non-funcall-position-p (match-beginning 0))))) (throw 'found t)))))) (defun elisp-mode-syntax-propertize@llama (start end) ;; Synced with Emacs up to 6b9510d94f814cacf43793dce76250b5f7e6f64a. "Highlight `##' as the symbol which it is." (goto-char start) (let ((case-fold-search nil)) (funcall (syntax-propertize-rules ;; Empty symbol. ;; {{ Comment out to prevent the `##' from becoming part of ;; the following symbol when there is no space in between. ;; ("##" (0 (unless (nth 8 (syntax-ppss)) ;; (string-to-syntax "_")))) ;; }} ;; {{ As for other symbols, use `font-lock-constant-face' in ;; docstrings and comments. ("##" (0 (when (nth 8 (syntax-ppss)) (string-to-syntax "_")))) ;; }} ;; {{ Preserve this part, even though it is absent from ;; this function in 29.1; backporting it by association. ;; Prevent the @ from becoming part of a following symbol. (",@" (0 (unless (nth 8 (syntax-ppss)) (string-to-syntax "'")))) ;; }} ;; Unicode character names. (The longest name is 88 characters ;; long.) ("\\?\\\\N{[-A-Za-z0-9 ]\\{,100\\}}" (0 (unless (nth 8 (syntax-ppss)) (string-to-syntax "_")))) ((rx "#" (or (seq (group-n 1 "&" (+ digit)) ?\") ; Bool-vector. (seq (group-n 1 "s") "(") ; Record. (seq (group-n 1 (+ "^")) "["))) ; Char-table. (1 (unless (save-excursion (nth 8 (syntax-ppss (match-beginning 0)))) (string-to-syntax "'"))))) start end))) ;;; Partial applications (defun llama--left-apply-partially (fn &rest args) "Return a function that is a partial application of FN to ARGS. ARGS is a list of the first N arguments to pass to FN. The result is a new function which does the same as FN, except that the first N arguments are fixed at the values with which this function was called. See also `llama--right-apply-partially', which instead fixes the last N arguments. These functions are intended to be used using the names `partial' and `rpartial'. To be able to use these shorthands in a file, you must set the file-local value of `read-symbols-shorthands', which was added in Emacs 28.1. For an example see the end of file \"llama.el\". This is an alternative to `apply-partially', whose name is too long." (declare (pure t) (side-effect-free error-free)) (lambda (&rest args2) (apply fn (append args args2)))) (defun llama--right-apply-partially (fn &rest args) "Return a function that is a right partial application of FN to ARGS. ARGS is a list of the last N arguments to pass to FN. The result is a new function which does the same as FN, except that the last N arguments are fixed at the values with which this function was called. See also `llama--left-apply-partially', which instead fixes the first N arguments. These functions are intended to be used using the names `rpartial' and `partial'. To be able to use these shorthands in a file, you must set the file-local value of `read-symbols-shorthands', which was added in Emacs 28.1. For an example see the end of file \"llama.el\"." (declare (pure t) (side-effect-free error-free)) (lambda (&rest args2) (apply fn (append args2 args)))) ;; An example of how one would use these functions: ;; ;; (list (funcall (partial (lambda (a b) (list a b)) 'fixed) 'after) ;; (funcall (rpartial (lambda (a b) (list a b)) 'fixed) 'before)) ;; An example of the configuration that is necessary to enable this: ;; ;; Local Variables: ;; indent-tabs-mode: nil ;; read-symbol-shorthands: ( ;; ("partial" . "llama--left-apply-partially") ;; ("rpartial" . "llama--right-apply-partially")) ;; End: ;; ;; Do not set `read-symbol-shorthands' in the ".dir-locals.el" ;; file, because that does not work for uncompiled libraries. (provide 'llama) ;;; llama.el ends here