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easycrypt-syntax.el
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easycrypt-syntax.el
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;;; easycrypt-syntax.el --- Syntax definitions for EasyCrypt mode
;; --------------------------------------------------------------------
;; Copyright (c) - 2012--2016 - IMDEA Software Institute
;; Copyright (c) - 2012--2016 - Inria
;;
;; Distributed under the terms of the GPL-v3 license
;; --------------------------------------------------------------------
;;; Commentary:
;;
(require 'proof-syntax)
(require 'easycrypt-keywords)
(require 'easycrypt-hooks)
;;; Code:
(defconst easycrypt-id "[A-Za-z_]+")
(defconst easycrypt-terminal-string ".")
(defconst easycrypt-command-end-regexp "[^\\.]\\.\\(\\s \\|\n\\|$\\)")
(defconst easycrypt-keywords-proof-goal '("lemma" "equiv" "hoare" "realize"))
(defconst easycrypt-keywords-proof-save '("save" "qed"))
(defconst easycrypt-non-undoables-regexp "^pragma\\b")
(defconst easycrypt-keywords-code-open '("{"))
(defconst easycrypt-keywords-code-close '("}"))
(defconst easycrypt-keywords-code-end '(";"))
(defvar easycrypt-other-symbols "\\(\\.\\.\\|\\[\\]\\)")
(defvar easycrypt-operator-char-1 "=\\|<\\|>\\|~")
(defvar easycrypt-operator-char-2 "\\+\\|\\-")
(defvar easycrypt-operator-char-3 "\\*\\|/\\|%")
(defvar easycrypt-operator-char-4 "!\\|\\$\\|&\\|\\?\\|@\\|\\^\\|:\\||\\|#")
(defvar easycrypt-operator-char-1234
(concat "\\(" easycrypt-operator-char-1
"\\|" easycrypt-operator-char-2
"\\|" easycrypt-operator-char-3
"\\|" easycrypt-operator-char-4
"\\)"))
(defconst easycrypt-proof-save-regexp
(concat "^\\(" (proof-ids-to-regexp easycrypt-keywords-proof-save) "\\)\\b"))
(defconst easycrypt-goal-command-regexp
(concat "^\\(?:local\\s-+\\)?\\(?:" (proof-ids-to-regexp easycrypt-keywords-proof-goal) "\\)"
"\\s-+\\(?:nosmt\\s-+\\)?\\(\\sw+\\)"))
(defun easycrypt-save-command-p (span str)
"Decide whether argument is a [save|qed] command or not."
(let ((txt (or (span-property span 'cmd) "")))
(proof-string-match-safe easycrypt-proof-save-regexp txt)))
(defun easycrypt-goal-command-p (span)
"Is SPAN a goal start?"
(let ((txt (or (span-property span 'cmd) "")))
(proof-string-match-safe easycrypt-goal-command-regexp txt)))
(defun easycrypt-init-output-syntax-table ()
"Set appropriate values for syntax table for EasyCrypt output."
(modify-syntax-entry ?, " ")
(modify-syntax-entry ?\' "_")
(modify-syntax-entry ?_ "_")
;; For comments
(modify-syntax-entry ?\* ". 23")
;; For blocks
(modify-syntax-entry ?\( "()1")
(modify-syntax-entry ?\) ")(4")
(modify-syntax-entry ?\{ "(}")
(modify-syntax-entry ?\} "){")
(modify-syntax-entry ?\[ "(]")
(modify-syntax-entry ?\] ")["))
;; ----- regular expressions
(defvar easycrypt-error-regexp "^\\[error-[0-9]+-[0-9]+\\]\\|^anomaly"
"A regexp indicating that the EasyCrypt process has identified an error.")
(defvar easycrypt-shell-proof-completed-regexp "No more goals"
"*Regular expression indicating that the proof has been completed.")
(defconst easycrypt-any-command-regexp
;; allow terminator to be considered as command start:
;; FIXME: really needs change in generic function to take account of this,
;; since the end character of a command is not the start
(concat "\\(\\s(\\|\\s)\\|\\sw\\|\\s \\|\\s_\\)*=" ;match assignments
"\\|;;\\|;\\|"
(proof-ids-to-regexp easycrypt-global-keywords))
"Regexp matching any EasyCrypt command start or the terminator character.")
(defconst easycrypt-keywords-indent-open
(append (append '("local") easycrypt-keywords-proof-goal)
easycrypt-keywords-code-open))
(defconst easycrypt-keywords-indent-close
(append easycrypt-keywords-proof-save
easycrypt-keywords-code-close))
(defconst easycrypt-keywords-indent-enclose
(append easycrypt-keywords-code-open
easycrypt-keywords-code-close
easycrypt-keywords-code-end
easycrypt-keywords-proof-goal
easycrypt-keywords-proof-save))
; Regular expression for indentation
(defconst easycrypt-indent-any-regexp
(proof-regexp-alt easycrypt-any-command-regexp "\\s(" "\\s)"))
(defconst easycrypt-indent-enclose-regexp
(proof-regexp-alt (proof-ids-to-regexp easycrypt-keywords-indent-enclose) "\\s)"))
(defconst easycrypt-indent-open-regexp
(proof-regexp-alt (proof-ids-to-regexp easycrypt-keywords-indent-open) "\\s("))
(defconst easycrypt-indent-close-regexp
(proof-regexp-alt (proof-ids-to-regexp easycrypt-keywords-indent-close) "\\s)"))
(defface easycrypt-tactics-closing-face
(proof-face-specs
(:foreground "red")
(:foreground "red")
())
"Face for names of closing tactics in proof scripts."
:group 'proof-faces)
(defface easycrypt-tactics-dangerous-face
(proof-face-specs
(:background "red")
(:background "red")
())
"Face for names of dangerous tactics in proof scripts."
:group 'proof-faces)
(defface easycrypt-tactics-tacticals-face
(proof-face-specs
(:foreground "dark green")
(:foreground "dark green")
())
"Face for names of tacticals in proof scripts."
:group 'proof-faces)
(defconst easycrypt-tactics-closing-face 'easycrypt-tactics-closing-face)
(defconst easycrypt-tactics-dangerous-face 'easycrypt-tactics-dangerous-face)
(defconst easycrypt-tactics-tacticals-face 'easycrypt-tactics-tacticals-face)
(defvar easycrypt-font-lock-keywords
(list
(cons (proof-ids-to-regexp easycrypt-global-keywords) 'font-lock-keyword-face)
(cons (proof-ids-to-regexp easycrypt-tactic-keywords) 'proof-tactics-name-face)
(cons (proof-ids-to-regexp easycrypt-tactical-keywords) 'easycrypt-tactics-tacticals-face)
(cons (proof-ids-to-regexp easycrypt-bytac-keywords) 'easycrypt-tactics-closing-face)
(cons (proof-ids-to-regexp easycrypt-dangerous-keywords) 'easycrypt-tactics-dangerous-face)
(cons (proof-ids-to-regexp easycrypt-prog-keywords) 'font-lock-keyword-face)
(cons (concat easycrypt-operator-char-1234 "+") 'font-lock-type-face)
(cons easycrypt-other-symbols 'font-lock-type-face)))
(defun easycrypt-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 ?_ "_")
(modify-syntax-entry ?\' "_")
(modify-syntax-entry ?\| ".")
(modify-syntax-entry ?\. ".")
(modify-syntax-entry ?\* ". 23n")
(modify-syntax-entry ?\( "()1")
(modify-syntax-entry ?\) ")(4"))
(provide 'easycrypt-syntax)
;;; easycrypt-syntax.el ends here