From 091a882409debf24cf717ad53e1388e2bada6832 Mon Sep 17 00:00:00 2001
From: Frank Duncan <frank@kank.net>
Date: Sat, 11 Jul 2015 19:05:38 -0500
Subject: [PATCH] Check whitespace at end of lines

---
 resources/whitespaceendline.lisp |  8 ++++++++
 resources/whitespacelines.lisp   |  8 ++++++++
 src/main/checker.lisp            | 26 +++++++++++++++++++++++---
 3 files changed, 39 insertions(+), 3 deletions(-)
 create mode 100644 resources/whitespaceendline.lisp
 create mode 100644 resources/whitespacelines.lisp

diff --git a/resources/whitespaceendline.lisp b/resources/whitespaceendline.lisp
new file mode 100644
index 0000000..068ff19
--- /dev/null
+++ b/resources/whitespaceendline.lisp
@@ -0,0 +1,8 @@
+(in-package #:nothing)
+
+(defun hello-world (a b c)
+ (progn
+  (with-open-file (str "increasinglylongfilenamesfailme.dat" :direction :input :if-does-not-exist :create) 
+   (when
+    (read-line str)
+    (format t "This file had some things in int, yay!~%")))))
diff --git a/resources/whitespacelines.lisp b/resources/whitespacelines.lisp
new file mode 100644
index 0000000..3724206
--- /dev/null
+++ b/resources/whitespacelines.lisp
@@ -0,0 +1,8 @@
+(in-package #:nothing)
+ 
+(defun hello-world (a b c)
+ (progn
+  (with-open-file (str "increasinglylongfilenamesfailme.dat" :direction :input :if-does-not-exist :create)
+   (when
+    (read-line str)
+    (format t "This file had some things in int, yay!~%")))))
diff --git a/src/main/checker.lisp b/src/main/checker.lisp
index a9c4082..8bae64f 100644
--- a/src/main/checker.lisp
+++ b/src/main/checker.lisp
@@ -9,7 +9,8 @@
 ; - No tabs
 ; - Only one space between elements in a form on a single line
 ; * in-package must be first line in file unless file is package.lisp
-; - No whitespace only lines
+; * No whitespace at end of line
+; * No lines that are only whitespace
 ; - No empty lines at end of file
 ; * Only one in-package per file
 ;
@@ -32,6 +33,8 @@
  (defparameter *possible-states*
   '(:begin ; start of file
     :normal ; normal processing
+    :beginning-of-line
+    :beginning-of-symbols
    )))
 
 
@@ -57,7 +60,7 @@
         (and ,scanner
              (stringp text)
              (multiple-value-bind (start end) (cl-ppcre:scan ,scanner text)
-              (and start end (= 0 start) (/= 0 end)))))))
+              (and start end (= 0 start)))))))
      (lambda (text) (second (multiple-value-list (cl-ppcre:scan ,scanner text))))
      ,func)
     *evaluators*))))
@@ -110,8 +113,22 @@
   (constantly "Only one in-package per file"))
  (defevaluator :normal "\\n"
   (lambda ()
+   (set-state :beginning-of-line)
    (incf *line-no*)
-   (setf *col-no* 0)
+   (setf *col-no* -1)
+   nil))
+ (defevaluator :normal " +\\n"
+  (lambda ()
+   "No whitespace at end of line"))
+ (defevaluator :beginning-of-line " *"
+  (lambda ()
+   (set-state :beginning-of-symbols)
+   nil))
+ (defevaluator :beginning-of-symbols "\\n"
+  (lambda () (when (< 0 *col-no*) "No whitespace only lines")))
+ (defevaluator :beginning-of-symbols ""
+  (lambda ()
+   (set-state :normal)
    nil))
  (defevaluator :normal "\\("
   (lambda ()
@@ -127,5 +144,8 @@
      ((not form) "Unmatched ending paren")
      ((< 50 (- *line-no* (car form))) "Forms can't be over 50 lines long")))))
 
+(cl-ppcre:scan (cl-ppcre:create-scanner " *") "
+asdf asdf")
+
  (defevaluator :normal "." (constantly nil))
  )
-- 
2.25.1