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;; isar-syntax.el Syntax expressions for Isabelle/Isar
;; Copyright (C) 1994-1998 LFCS Edinburgh.
;;
;; Author: David Aspinall <da@dcs.ed.ac.uk>
;; Maintainer: Markus Wenzel <wenzelm@in.tum.de>
;;
;; $Id$
;;
(require 'proof-syntax)
(require 'isar-keywords)
;;; Proof mode customization: how should it work?
;;; Presently we have a bunch of variables in proof.el which are
;;; set from a bunch of similarly named variables in <engine>-syntax.el.
;;;
;;; Seems a bit daft: why not just have the customization in
;;; one place, and settings hardwired in <engine>-syntax.el.
;;;
;;; That way we can see which settings are part of instantiation of
;;; proof.el, and which are part of cusomization for <engine>.
;; ------ customize groups
;(defgroup isar-scripting nil
; "Customization of Isabelle/Isar script management"
; :group 'external
; :group 'languages)
;(defgroup isar-syntax nil
; "Customization of Isabelle/Isar's syntax recognition"
; :group 'isar-scripting)
;; ----- character syntax
(defun isar-init-syntax-table ()
"Set appropriate values for syntax table in current buffer."
(modify-syntax-entry ?\$ ".")
(modify-syntax-entry ?\/ ".")
(modify-syntax-entry ?\\ ".")
(modify-syntax-entry ?+ ".")
(modify-syntax-entry ?- ".")
(modify-syntax-entry ?= ".")
(modify-syntax-entry ?% ".")
(modify-syntax-entry ?< ".")
(modify-syntax-entry ?> ".")
(modify-syntax-entry ?\& ".")
(modify-syntax-entry ?. "w")
(modify-syntax-entry ?_ "w")
(modify-syntax-entry ?\' "w")
(modify-syntax-entry ?\* ". 23")
(modify-syntax-entry ?\( "()1")
(modify-syntax-entry ?\) ")(4")
(modify-syntax-entry ?\{ "(}1")
(modify-syntax-entry ?\} "){4"))
(defun isar-init-output-syntax-table ()
"Set appropriate values for syntax table for Isabelle output."
(isar-init-syntax-table)
;; ignore strings so font-locking works
;; inside them
(modify-syntax-entry ?\" " "))
;; ----- syntax for font-lock and other features
(defconst isar-keywords-theory-enclose
(append isar-keywords-theory-begin
isar-keywords-theory-switch
isar-keywords-theory-end))
(defconst isar-keywords-theory
(append isar-keywords-theory-heading
isar-keywords-theory-decl
isar-keywords-theory-goal))
(defconst isar-keywords-save
(append isar-keywords-qed
isar-keywords-qed-block))
(defconst isar-keywords-proof-enclose
(append isar-keywords-proof-block
isar-keywords-qed
isar-keywords-qed-block))
(defconst isar-keywords-proof
(append isar-keywords-proof-goal
isar-keywords-proof-chain
isar-keywords-proof-decl))
(defconst isar-keywords-outline
(append isar-keywords-theory-begin
isar-keywords-theory-heading
isar-keywords-theory-goal))
(defconst isar-keywords-indent
(append isar-keywords-theory-heading
isar-keywords-theory-decl
isar-keywords-proof-block
isar-keywords-proof-decl
isar-keywords-proof-asm
isar-keywords-proof-script))
(defconst isar-keywords-indent-open
(append isar-keywords-theory-goal
isar-keywords-proof-goal))
(defconst isar-keywords-indent-close
(append isar-keywords-save))
(defconst isar-keywords-indent-enclose
(append isar-keywords-proof-block
isar-keywords-qed-block))
;; ----- regular expressions
(defconst isar-id "\\([A-Za-z][A-Za-z0-9'_]*\\)")
(defconst isar-idx (concat isar-id "\\(\\.[0-9]+\\)?"))
(defconst isar-ids (proof-ids isar-id "[ \t]*")
"Matches a sequence of identifiers separated by whitespace.")
(defconst isar-string "\"\\(\\([^\\\"]\\|\\\\\"\\)*\\)\"")
(defconst isar-name-regexp
(concat "\\s-*\\(" isar-string "\\|" isar-id "\\)\\s-*")
"Regexp matching Isabelle/Isar names, with contents grouped.")
(defvar isar-output-font-lock-terms
(list
(cons (concat "\351" isar-id "\350") 'proof-declaration-name-face) ; class
(cons (concat "\352'" isar-id "\350") 'proof-tacticals-name-face) ; tfree
(cons (concat "\353\\?'" isar-idx "\350") 'font-lock-type-face) ; tvar
(cons (concat "\354" isar-id "\350") 'font-lock-keyword-face) ; free
(cons (concat "\355" isar-id "\350") 'font-lock-keyword-face) ; bound
(cons (concat "\356" isar-idx "\350") 'font-lock-function-name-face) ; var
)
"*Font-lock table for Isabelle terms.")
(defconst isar-save-command-regexp
(proof-anchor-regexp (proof-ids-to-regexp isar-keywords-save)))
(defconst isar-save-with-hole-regexp "$^") ; n.a.
(defconst isar-goal-command-regexp
(proof-anchor-regexp (proof-ids-to-regexp isar-keywords-theory-goal)))
(defconst isar-local-goal-command-regexp
(proof-anchor-regexp (proof-ids-to-regexp isar-keywords-proof-goal)))
(defconst isar-goal-with-hole-regexp
(concat "\\(" (proof-ids-to-regexp isar-keywords-theory-goal) "\\)" isar-name-regexp ":")
"Regexp matching goal commands in Isabelle/Isar which name a theorem")
(defvar isar-font-lock-keywords-1
(list
(cons (proof-ids-to-regexp isar-keywords-minor) 'font-lock-type-face)
(cons (proof-ids-to-regexp isar-keywords-control) 'proof-error-face)
(cons (proof-ids-to-regexp isar-keywords-diag) 'proof-tacticals-name-face)
(cons (proof-ids-to-regexp isar-keywords-theory-enclose) 'font-lock-function-name-face)
(cons (proof-ids-to-regexp isar-keywords-theory) 'font-lock-keyword-face)
(cons (proof-ids-to-regexp isar-keywords-proof-enclose) 'font-lock-function-name-face)
(cons (proof-ids-to-regexp isar-keywords-proof) 'font-lock-keyword-face)
(cons (proof-ids-to-regexp isar-keywords-proof-asm) 'proof-declaration-name-face)
(cons (proof-ids-to-regexp isar-keywords-proof-script) 'font-lock-reference-face)))
;; ----- variations on undo
(defconst isar-undo "undo;")
(defconst isar-kill "kill;")
(defun isar-remove (name)
(concat "init_toplevel; remove_thy \"" name "\";"))
(defun isar-undos (i)
(if (> i 0)
(concat "undos_proof " (int-to-string i) ";")
proof-no-command))
(defun isar-cannot-undo (cmd)
(concat "cannot_undo \"" cmd "\";"))
(defconst isar-undo-fail-regexp
(proof-anchor-regexp
(proof-ids-to-regexp (append isar-keywords-control isar-keywords-theory-end))))
(defconst isar-undo-skip-regexp
(proof-anchor-regexp (concat ";\\|" (proof-ids-to-regexp isar-keywords-diag))))
(defconst isar-undo-remove-regexp
(concat
(proof-anchor-regexp (proof-ids-to-regexp isar-keywords-theory-begin))
isar-name-regexp))
(defconst isar-undo-kill-regexp
(proof-anchor-regexp (proof-ids-to-regexp isar-keywords-theory-switch)))
(provide 'isar-syntax)
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