# HG changeset patch # User Steve Losh # Date 1460219935 0 # Node ID 330b4236a18e7eca3ad214885e3165efe761f648 Start repo. diff -r 000000000000 -r 330b4236a18e .hgignore --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.hgignore Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,9 @@ +syntax: glob + +.DS_Store +*.pyc +*.swp +*.swo +*.un~ +.ropeproject +tags diff -r 000000000000 -r 330b4236a18e Makefile --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Makefile Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,4 @@ +.PHONY: + +utilities.lisp: make-utilities.lisp + sbcl --noinform --load make-utilities.lisp --eval '(quit)' diff -r 000000000000 -r 330b4236a18e README.markdown --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.markdown Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,1 @@ +My solutions to Project Euler problems. diff -r 000000000000 -r 330b4236a18e euler.asd --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/euler.asd Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,22 @@ +(asdf:defsystem #:euler + :name "euler" + :description "Project Euler solutions." + + :author "Steve Losh " + :maintainer "Steve Losh " + + :license "MIT/X11" + :version "0.0.1" + + :depends-on (#:defstar + #:optima + #:trivial-types + #:cl-arrows + #:fare-quasiquote-optima + #:fare-quasiquote-readtable) + + :serial t + :components ((:file "utilities") ; quickutils package ordering crap + (:file "package") + (:file "euler"))) + diff -r 000000000000 -r 330b4236a18e euler.lisp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/euler.lisp Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,20 @@ +(in-package #:euler) + +(defun dividesp (n divisor) + "Return whether `n` is evenly divisible by `divisor`." + (zerop (mod n divisor))) + +(defun problem-1 () + (loop :for i :from 1 :below 1000 + :when (or (dividesp i 3) + (dividesp i 5)) + :sum i)) + +(defun problem-2 () + (loop :with p = 0 + :with n = 1 + :while (<= n 4000000) + :when (evenp n) :sum n + :do (psetf p n + n (+ p n)))) + diff -r 000000000000 -r 330b4236a18e make-utilities.lisp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/make-utilities.lisp Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,10 @@ +(ql:quickload 'quickutil) + +(qtlc:save-utils-as + "utilities.lisp" + :utilities '(:define-constant + :switch + :ensure-boolean + :with-gensyms + ) + :package "EULER.UTILITIES") diff -r 000000000000 -r 330b4236a18e package.lisp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/package.lisp Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,2 @@ +(defpackage #:euler + (:use #:cl #:euler.utilities)) diff -r 000000000000 -r 330b4236a18e utilities.lisp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/utilities.lisp Sat Apr 09 16:38:55 2016 +0000 @@ -0,0 +1,159 @@ +;;;; This file was automatically generated by Quickutil. +;;;; See http://quickutil.org for details. + +;;;; To regenerate: +;;;; (qtlc:save-utils-as "utilities.lisp" :utilities '(:DEFINE-CONSTANT :SWITCH :ENSURE-BOOLEAN :WITH-GENSYMS) :ensure-package T :package "EULER.UTILITIES") + +(eval-when (:compile-toplevel :load-toplevel :execute) + (unless (find-package "EULER.UTILITIES") + (defpackage "EULER.UTILITIES" + (:documentation "Package that contains Quickutil utility functions.") + (:use #:cl)))) + +(in-package "EULER.UTILITIES") + +(when (boundp '*utilities*) + (setf *utilities* (union *utilities* '(:DEFINE-CONSTANT :STRING-DESIGNATOR + :WITH-GENSYMS :EXTRACT-FUNCTION-NAME + :SWITCH :ENSURE-BOOLEAN)))) + + (defun %reevaluate-constant (name value test) + (if (not (boundp name)) + value + (let ((old (symbol-value name)) + (new value)) + (if (not (constantp name)) + (prog1 new + (cerror "Try to redefine the variable as a constant." + "~@<~S is an already bound non-constant variable ~ + whose value is ~S.~:@>" name old)) + (if (funcall test old new) + old + (restart-case + (error "~@<~S is an already defined constant whose value ~ + ~S is not equal to the provided initial value ~S ~ + under ~S.~:@>" name old new test) + (ignore () + :report "Retain the current value." + old) + (continue () + :report "Try to redefine the constant." + new))))))) + + (defmacro define-constant (name initial-value &key (test ''eql) documentation) + "Ensures that the global variable named by `name` is a constant with a value +that is equal under `test` to the result of evaluating `initial-value`. `test` is a +function designator that defaults to `eql`. If `documentation` is given, it +becomes the documentation string of the constant. + +Signals an error if `name` is already a bound non-constant variable. + +Signals an error if `name` is already a constant variable whose value is not +equal under `test` to result of evaluating `initial-value`." + `(defconstant ,name (%reevaluate-constant ',name ,initial-value ,test) + ,@(when documentation `(,documentation)))) + + + (deftype string-designator () + "A string designator type. A string designator is either a string, a symbol, +or a character." + `(or symbol string character)) + +(eval-when (:compile-toplevel :load-toplevel :execute) + (defmacro with-gensyms (names &body forms) + "Binds each variable named by a symbol in `names` to a unique symbol around +`forms`. Each of `names` must either be either a symbol, or of the form: + + (symbol string-designator) + +Bare symbols appearing in `names` are equivalent to: + + (symbol symbol) + +The string-designator is used as the argument to `gensym` when constructing the +unique symbol the named variable will be bound to." + `(let ,(mapcar (lambda (name) + (multiple-value-bind (symbol string) + (etypecase name + (symbol + (values name (symbol-name name))) + ((cons symbol (cons string-designator null)) + (values (first name) (string (second name))))) + `(,symbol (gensym ,string)))) + names) + ,@forms)) + + (defmacro with-unique-names (names &body forms) + "Binds each variable named by a symbol in `names` to a unique symbol around +`forms`. Each of `names` must either be either a symbol, or of the form: + + (symbol string-designator) + +Bare symbols appearing in `names` are equivalent to: + + (symbol symbol) + +The string-designator is used as the argument to `gensym` when constructing the +unique symbol the named variable will be bound to." + `(with-gensyms ,names ,@forms)) + ) ; eval-when +(eval-when (:compile-toplevel :load-toplevel :execute) + (defun extract-function-name (spec) + "Useful for macros that want to mimic the functional interface for functions +like `#'eq` and `'eq`." + (if (and (consp spec) + (member (first spec) '(quote function))) + (second spec) + spec)) + ) ; eval-when + + (eval-when (:compile-toplevel :load-toplevel :execute) + (defun generate-switch-body (whole object clauses test key &optional default) + (with-gensyms (value) + (setf test (extract-function-name test)) + (setf key (extract-function-name key)) + (when (and (consp default) + (member (first default) '(error cerror))) + (setf default `(,@default "No keys match in SWITCH. Testing against ~S with ~S." + ,value ',test))) + `(let ((,value (,key ,object))) + (cond ,@(mapcar (lambda (clause) + (if (member (first clause) '(t otherwise)) + (progn + (when default + (error "Multiple default clauses or illegal use of a default clause in ~S." + whole)) + (setf default `(progn ,@(rest clause))) + '(())) + (destructuring-bind (key-form &body forms) clause + `((,test ,value ,key-form) + ,@forms)))) + clauses) + (t ,default)))))) + + (defmacro switch (&whole whole (object &key (test 'eql) (key 'identity)) + &body clauses) + "Evaluates first matching clause, returning its values, or evaluates and +returns the values of `default` if no keys match." + (generate-switch-body whole object clauses test key)) + + (defmacro eswitch (&whole whole (object &key (test 'eql) (key 'identity)) + &body clauses) + "Like `switch`, but signals an error if no key matches." + (generate-switch-body whole object clauses test key '(error))) + + (defmacro cswitch (&whole whole (object &key (test 'eql) (key 'identity)) + &body clauses) + "Like `switch`, but signals a continuable error if no key matches." + (generate-switch-body whole object clauses test key '(cerror "Return NIL from CSWITCH."))) + + + (defun ensure-boolean (x) + "Convert `x` into a Boolean value." + (and x t)) + +(eval-when (:compile-toplevel :load-toplevel :execute) + (export '(define-constant switch eswitch cswitch ensure-boolean with-gensyms + with-unique-names))) + +;;;; END OF utilities.lisp ;;;;