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Emacs major mode for ActorScript #223

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Merged
matthewhammer merged 4 commits into from
Mar 18, 2019
Merged

Emacs major mode for ActorScript #223

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80f73df
initial ActorScript mode for emacs
matthewhammer Mar 8, 2019
d4c7636
module keyword
matthewhammer Mar 8, 2019
ee4b495
fix font-lock for (most) symbols; special regex symbols still broken
matthewhammer Mar 8, 2019
189463d
bright braces
matthewhammer Mar 8, 2019
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151 changes: 151 additions & 0 deletions emacs/actorscript-mode.el
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Original file line number Diff line number Diff line change
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;; ActorScript major mode for Emacs
;; initially based on Swift Mode.

(setq actorscript-font-lock-keywords
(let* (
;; define several category of keywords
;; these are each taken from either ActorScript's `lexer.mll' or `prelude.ml' files.
(x-types
'("Any"
"None"
"Shared"
"Null"
"Bool"
"Nat"
"Int"
"Word8"
"Word16"
"Word32"
"Word64"
"Float"
"Char"
"Text"))
(x-constants
'("null"
"true"
"false"
))
(x-keywords
'("actor"
"and"
"async"
"assert"
"await"
"break"
"case"
"class"
"continue"
"label"
"else"
"for"
"func"
"if"
"in"
"module"
"new"
"not"
"object"
"or"
"let"
"loop"
"private"
"return"
"shared"
"switch"
"type"
"var"
"while"
"prim"
))
;; Braces introduce blocks; it's nice to make them stand
;; out more than ordinary symbols
(x-braces
'( "{"
"}"))
(x-symbols
'( "("
")"
"["
"]"
;"{"
;"}"
";"
","
":"
"<:"
;"\\."
;"\\?"
"="
"<"
">"
;"\\+"
"-"
;"\\*"
"/"
"%"
"**"
"&"
"|"
;"\\^"
"<<"
">>"
"<<>"
"<>>"
"#"
"=="
"!="
">="
"<="
":="
"+="
"-="
"*="
"/="
"%="
"**="
"&="
"|="
"^="
"<<="
">>="
"<<>="
"<>>="
"#="
))
;; xxx These still don't work:
(x-symbols-more
'( "\\."
"\\?"
"\\+"
"\\-"
"\\*"
"\\^"
))
;; generate regex string for each category of keywords
(x-types-regexp (regexp-opt x-types 'words))
(x-constant-regexp (regexp-opt x-constants 'words))
(x-keywords-regexp (regexp-opt x-keywords 'words))
(x-braces-regexp (regexp-opt x-braces))
(x-symbols-regexp (regexp-opt x-symbols))
(x-symbols-more-regexp (regexp-opt x-symbols-more))
)
;;
`(
(,x-types-regexp . font-lock-type-face)
(,x-constant-regexp . font-lock-constant-face)
(,x-keywords-regexp . font-lock-keyword-face)
(,x-braces-regexp . font-lock-keyword-face)
(,x-symbols-regexp . font-lock-builtin-face)
(,x-symbols-more-regexp . font-lock-builtin-face)
)))

(define-derived-mode actorscript-mode
swift-mode "ActorScript"
"Major mode for ActorScript, aka 'CanisterScript'."
(setq font-lock-defaults '((actorscript-font-lock-keywords)))
)

(add-to-list 'auto-mode-alist '("\\.as\\'" . actorscript-mode))

;; add the mode to the `features' list
(provide 'actorscript-mode)