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+;;; make.by -- BY notation for Makefiles.
+
+;; Copyright (C) 1999-2012 Free Software Foundation, Inc.
+;;
+;; Author: Eric M. Ludlam <zappo@gnu.org>
+;;         David Ponce <david@dponce.com>
+;;         Klaus Berndl <klaus.berndl@sdm.de>
+;;
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs 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.
+
+;; GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+%package semantic-make-by
+
+%languagemode  makefile-mode
+%start         Makefile
+
+;; This was always a test case.
+%quotemode     backquote
+
+%token IF      "if"
+%token IFDEF   "ifdef"
+%token IFNDEF  "ifndef"
+%token IFEQ    "ifeq"
+%token IFNEQ   "ifneq"
+%token ELSE    "else"
+%token ENDIF   "endif"
+%token INCLUDE "include"
+
+%put { IF ELSE ENDIF } summary "Conditional: if (expression) ... else ... endif"
+%put IFDEF   summary "Conditional: ifdef (expression) ... else ... endif"
+%put IFNDEF  summary "Conditional: ifndef (expression) ... else ... endif"
+%put IFEQ    summary "Conditional: ifeq (expression) ... else ... endif"
+%put IFNEQ   summary "Conditional: ifneq (expression) ... else ... endif"
+%put INCLUDE summary "Macro: include filename1 filename2 ..."
+
+%token <punctuation> COLON     "\\`[:]\\'"
+%token <punctuation> PLUS      "\\`[+]\\'"
+%token <punctuation> EQUAL     "\\`[=]\\'"
+%token <punctuation> DOLLAR    "\\`[$]\\'"
+%token <punctuation> BACKSLASH "\\`[\\]\\'"
+
+%%
+
+Makefile : bol newline (nil)
+         | bol variable
+           ( ,@$2 )
+         | bol rule
+           ( ,@$2 )
+         | bol conditional
+           ( ,@$2 )
+         | bol include
+           ( ,@$2 )
+         | whitespace ( nil )
+         | newline ( nil )
+         ;
+
+variable: symbol opt-whitespace equals opt-whitespace element-list
+          (VARIABLE-TAG ,$1 nil ,$5)
+        ;
+
+rule: targets opt-whitespace colons opt-whitespace element-list commands
+      (FUNCTION-TAG ,$1 nil ,$5)
+    ;
+
+targets: target opt-whitespace targets
+         ( (car ,$1) (car ,@$3) )
+       | target
+         ( (car ,$1) )
+       ;
+
+target: sub-target target
+        ( (concat (car ,$1) (car ,@$3) ) )
+      | sub-target
+        ( (car ,$1) )
+      ;
+
+sub-target: symbol
+          | string
+          | varref
+          ;
+
+conditional: IF some-whitespace symbol newline
+             ( nil )
+           | IFDEF some-whitespace symbol newline
+             ( nil )
+           | IFNDEF some-whitespace symbol newline
+             ( nil )
+           | IFEQ some-whitespace expression newline
+             ( nil )
+           | IFNEQ some-whitespace expression newline
+             ( nil )
+           | ELSE newline
+             ( nil )
+           | ENDIF newline
+             ( nil )
+           ;
+
+expression : semantic-list
+           ;
+
+include: INCLUDE some-whitespace element-list
+         (INCLUDE-TAG ,$3 nil)
+       ;
+
+equals: COLON EQUAL ()
+      | PLUS EQUAL ()
+      | EQUAL ()
+      ;
+
+colons: COLON COLON ()
+      | COLON ()
+      ;
+
+element-list: elements newline
+              ( ,@$1 )
+            ;
+
+elements: element some-whitespace elements
+          ( ,@$1 ,@$3 )
+        | element
+          ( ,@$1 )
+        | ;;EMPTY
+        ;
+  
+element: sub-element element
+         ( (concat (car ,$1) (car ,$2)) )
+       | ;;EMPTY
+       ;
+
+sub-element: symbol
+           | string
+           | punctuation
+           | semantic-list
+             ( (buffer-substring-no-properties
+                 (identity start) (identity end)) )
+           ;
+
+varref: DOLLAR semantic-list
+        ( (buffer-substring-no-properties (identity start) (identity end)) )
+      ;
+
+commands: bol shell-command newline commands
+          ( ,$1 ,@$2 )
+        | ;;EMPTY
+          ( )
+        ;
+
+opt-whitespace : some-whitespace ( nil )
+               | ;;EMPTY
+               ;
+
+some-whitespace : whitespace some-whitespace (nil)
+                | whitespace (nil)
+                ;
+
+;;; make.by ends here