;;; srecode-template.wy --- Semantic Recoder Template parser

;; Copyright (C) 2005-2025 Free Software Foundation, Inc.

;; Author: Eric M. Ludlam <zappo@gnu.org>
;; Keywords: syntax
;; X-RCS: $Id: srecode-template.wy,v 1.10 2009-01-09 23:01:54 zappo Exp $

;; 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/>.

;;; Commentary:
;;
;; Parser for the Semantic Recoder template language
;;
;; Semantic Recoder templates are based on Google Templates
;; and are at the bottom of the Semantic Recoder API.

%package srecode-template-wy
%provide srecode/srt-wy

%languagemode  srecode-mode

%start template_file

;;; KEYWORDS
%type    <keyword>
%keyword SET  "set"
%put     SET  summary "set <name> <value>"
%keyword SHOW "show"
%put     SHOW summary "show <name>   ; to show a section"
%keyword MACRO "macro"
%put     MACRO summary "... macro \"string\" ..."
%keyword CONTEXT "context"
%put     CONTEXT summary "context <name>"
%keyword TEMPLATE  "template"
%put     TEMPLATE  summary "template <name>\\n <template definition>"
%keyword SECTIONDICTIONARY "sectiondictionary"
%put     SECTIONDICTIONARY summary "sectiondictionary <name>\\n <dictionary entries>"

%keyword SECTION  "section"
%put     SECTION  summary
         "section <name>\\n <dictionary entries>\\n end"

%keyword END      "end"
%put     END      summary
         "section ... end"

%keyword PROMPT "prompt"
%keyword DEFAULT "default"
%keyword DEFAULTMACRO "defaultmacro"
%keyword READ "read"
%put     { PROMPT DEFAULT DEFAULTMACRO READ } summary "prompt <symbol> \"Describe Symbol: \" [default[macro] <lispsym>|\"valuetext\"] [read <lispsym>]"
%keyword BIND "bind"
%put     BIND summary "bind \"<letter>\""

;;; Punctuation Types
%type <punctuation> syntax "\\s.+"
%type <newline>
%token <newline> newline

%token <separator> TEMPLATE_BLOCK "^----"

;;; Bland default types
%type <property> syntax ":\\(\\w\\|\\s_\\)*"
%token <property> property

%type  <symbol>
%token <symbol> symbol

%type  <string>
%token <string> string

%type  <number>
%token <number> number

%%

template_file
  : newline ( )
  | context
  | prompt
  | variable
  | template
  ;

context
  : CONTEXT symbol newline
    (TAG $2 'context)
  ;

prompt
  : PROMPT symbol string opt-default-fcn opt-read-fcn newline
    (TAG $2 'prompt :text (read $3) :default $4 :read $5)
  ;

opt-default-fcn
  : DEFAULT symbol
    (progn (read $2))
  | DEFAULT string
    (progn (read $2))
  | DEFAULTMACRO string
    (progn (cons 'macro (read $2)))
  | ()
  ;

opt-read-fcn
  : READ symbol
    (progn (read $2))
  | ()
  ;

variable
  : SET symbol insertable-string-list newline
    (VARIABLE-TAG $2 nil $3)
  | SET symbol number newline
    ;; This so a common error with priority works.
    ;; Note that "number" still has a string value in the lexer.
    (VARIABLE-TAG $2 nil (list $3))
  | SHOW symbol newline
    (VARIABLE-TAG $2 nil t)
  ;

insertable-string-list
  : insertable-string
    (list $1)
  | insertable-string-list insertable-string
    (append $1 (list $2))
  ;

insertable-string
  : string
    (read $1)
  | MACRO string
    (cons 'macro (read $2))
  ;

template
  : TEMPLATE templatename opt-dynamic-arguments newline
    opt-string
    section-dictionary-list
    TEMPLATE_BLOCK newline
    opt-bind
    (FUNCTION-TAG $2 nil $3 :documentation $5 :code $7
		  :dictionaries $6 :binding $9 )
  ;

templatename
  : symbol
  | PROMPT
  | CONTEXT
  | TEMPLATE
  | DEFAULT
  | MACRO
  | DEFAULTMACRO
  | READ
  | SET
  ;

opt-dynamic-arguments
  : property opt-dynamic-arguments
    (cons $1 $2)
  | ()
  ;

opt-string
  : string newline
    ( read $1 )
  | ()
  ;

section-dictionary-list
  : ;; empty
    ()
  | section-dictionary-list flat-section-dictionary
    (append $1 (list $2))
  | section-dictionary-list section-dictionary
    (append $1 (list $2))
  ;

flat-section-dictionary
  : SECTIONDICTIONARY string newline
    flat-dictionary-entry-list
    (cons (read $2) $4)
  ;

flat-dictionary-entry-list
  : ;; empty
    ()
  | flat-dictionary-entry-list flat-dictionary-entry
    (append $1 $2)
  ;

flat-dictionary-entry
  : variable
    (EXPANDTAG $1)
  ;

section-dictionary
  : SECTION string newline
    dictionary-entry-list
    END newline
    (cons (read $2) $4)
  ;

dictionary-entry-list
  : ;; empty
    ()
  | dictionary-entry-list dictionary-entry
    (append $1 $2)
  ;

dictionary-entry
  : variable
    (EXPANDTAG $1)
  | section-dictionary
    (list $1)
  ;

opt-bind
  : BIND string newline
    ( read $2 )
  | ()
  ;

%%
(define-lex-simple-regex-analyzer srecode-template-property-analyzer
  "Detect and create a dynamic argument properties."
  ":\\(\\w\\|\\s_\\)*" 'property 0)

(define-lex-regex-analyzer srecode-template-separator-block
  "Detect and create a template quote block."
  "^----\n"
  (semantic-lex-push-token
   (semantic-lex-token
    'TEMPLATE_BLOCK
    (match-end 0)
    (semantic-lex-unterminated-syntax-protection 'TEMPLATE_BLOCK
      (goto-char (match-end 0))
      (re-search-forward "^----$")
      (match-beginning 0))))
  (setq semantic-lex-end-point (point)))


(define-lex wisent-srecode-template-lexer
  "Lexical analyzer that handles SRecode Template buffers.
It ignores whitespace, newlines and comments."
  semantic-lex-newline
  semantic-lex-ignore-whitespace
  semantic-lex-ignore-newline
  semantic-lex-ignore-comments
  srecode-template-separator-block
  srecode-template-wy--<keyword>-keyword-analyzer
  srecode-template-property-analyzer
  srecode-template-wy--<number>-regexp-analyzer
  srecode-template-wy--<symbol>-regexp-analyzer
  srecode-template-wy--<string>-sexp-analyzer
  srecode-template-wy--<punctuation>-string-analyzer
  semantic-lex-default-action
  )

;;; srecode-template.wy ends here