[英]How to include camlp4 on emacs, ubuntu
我下面有源代碼。 我知道這是行不通的,因為缺少camlp4。 現在我的操作系統是Ubuntu,我正在將caml模式用於emacs編輯器。 您能幫我為我的emacs配置camlp4,以便我運行此代碼嗎? 非常感謝
type term = V of string | F of string * term list
let rec symbols = function
| V x -> [x]
| F (f, ts) -> f :: [ g | t <- ts; g <- symbols t ]
let rec functions = function
| V _ -> []
| F (f, ts) -> f :: [ g | t <- ts; g <- functions t ]
您正在使用的列表理解是Camlp4的一部分。 要在終端仿真器中編譯此代碼,您應該輸入
ocamlfind c -package camlp4.listcomprehension -syntax camlp4o -c a.ml
編譯行與emacs或camlmode不相關。 但是,如果您想在頂層嘗試此代碼,則需要輸入以下內容:
$ ocaml
OCaml version 4.02.1
Findlib has been successfully loaded. Additional directives:
#require "package";; to load a package
#list;; to list the available packages
#camlp4o;; to load camlp4 (standard syntax)
#camlp4r;; to load camlp4 (revised syntax)
#predicates "p,q,...";; to set these predicates
Topfind.reset();; to force that packages will be reloaded
#thread;; to enable threads
# #camlp4o;;
/home/kakadu/.opam/4.02.1/lib/ocaml/dynlink.cma: loaded
/home/kakadu/.opam/4.02.1/lib/ocaml/camlp4: added to search path
/home/kakadu/.opam/4.02.1/lib/ocaml/camlp4/camlp4o.cma: loaded
Camlp4 Parsing version 4.02.1
# #require "camlp4.listcomprehension";;
/home/kakadu/.opam/4.02.1/lib/ocaml/camlp4/Camlp4Parsers/Camlp4ListComprehension.cmo: loaded
# type term = V of string | F of string * term list;;
type term = V of string | F of string * term list
# let rec symbols = function
| V x -> [x]
| F (f, ts) -> f :: [ g | t <- ts; g <- symbols t ];;
val symbols : term -> string list = <fun>
$ cat ~/.ocamlinit
#use "topfind";;
要將camlp4安裝到您的計算機上,您需要預編譯的Ubuntu軟件包或opam軟件包。
非常感謝卡卡杜。 我想我想出了答案。 首先,我在ubuntu上安裝camlp4。
apt-get install camlp4
apt-get install camlp4-extra
然后,在我的源代碼中創建一個文件.ocamlinit並添加:
#load "dynlink.cma";;
#load "camlp4of.cma";;
我認為這些步驟已經解決了我上面的問題,
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.