Add headings to compose implementations
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@ -435,7 +435,7 @@ imalison:named-build is used to name a lambda produced by another macro applied
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(cons ,builder-name args)))
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(cons ,builder-name args)))
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#+END_SRC
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#+END_SRC
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** Compose functions
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** Compose functions
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The composed functions can take arbitrarily many arguments and returning arbitrarily many arguments.
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*** Arbitrary arguments at every step
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#+BEGIN_SRC emacs-lisp
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#+BEGIN_SRC emacs-lisp
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(defun imalison:make-list (thing)
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(defun imalison:make-list (thing)
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(if (listp thing)
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(if (listp thing)
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@ -454,8 +454,7 @@ The composed functions can take arbitrarily many arguments and returning arbitra
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`(apply ,(car funcs)
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`(apply ,(car funcs)
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(imalison:make-list (imalison:compose-helper ,(cdr funcs))))))
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(imalison:make-list (imalison:compose-helper ,(cdr funcs))))))
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#+END_SRC
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#+END_SRC
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*** Simpler Unary version
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Here is a unary version which avoids all the calls to imalison:make-list
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#+BEGIN_SRC emacs-lisp
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#+BEGIN_SRC emacs-lisp
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(defmacro imalison:compose-unary (&rest funcs)
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(defmacro imalison:compose-unary (&rest funcs)
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"Build a new function with NAME that is the composition of FUNCS."
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"Build a new function with NAME that is the composition of FUNCS."
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@ -468,8 +467,7 @@ Here is a unary version which avoids all the calls to imalison:make-list
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'arg
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'arg
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`(funcall ,(car funcs) (imalison:compose-helper-unary ,(cdr funcs)))))
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`(funcall ,(car funcs) (imalison:compose-helper-unary ,(cdr funcs)))))
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#+END_SRC
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#+END_SRC
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*** Most performant version supports macros
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Here is a version that will support macros and requires unary functions after the first one
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#+BEGIN_SRC emacs-lisp
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#+BEGIN_SRC emacs-lisp
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(defmacro imalison:compose-named-functions (arguments &rest funcs)
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(defmacro imalison:compose-named-functions (arguments &rest funcs)
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"Build a new function with NAME that is the composition of FUNCS."
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"Build a new function with NAME that is the composition of FUNCS."
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