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|
;;; make.by -- BY notation for Makefiles.
;; Copyright (C) 1999-2025 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 <https://www.gnu.org/licenses/>.
%package semantic-make-by
%provide semantic/bovine/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 "\\`[\\]\\'"
%%
;; Escape the ,@ below because the reader doesn't correctly detect
;; old-style backquotes for this case. The backslashes can be removed
;; once old-style backquotes are completely gone (probably in
;; Emacs 28).
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
|
