如果我有一个这样结构的项目:
project/
src/
Foo.hs
Bar.hs
使用文件Foo.hs:
module Foo where
foo :: String
foo = "foo"
和Bar.hs:
module Bar where
import Foo
bar :: String
bar = foo ++ "bar"
如果我的当前目录是src
,并且我输入ghci并运行:l Bar.hs
,我会得到预期的输出:
[1 of 2] Compiling Foo ( Foo.hs, interpreted )
[2 of 2] Compiling Bar ( Bar.hs, interpreted )
Ok, modules loaded: Bar, Foo.
但是,如果我移到project
目录(我更喜欢呆在那里并运行vim/ghci/anything),并尝试:l src/Bar.hs
,我会得到:
src/Bar.hs:3:8:
Could not find module ‘Foo’
Use -v to see a list of the files searched for.
Failed, modules loaded: none.
为什么ghc不在与Bar相同的目录中搜索Foo?我能做到吗?我能把这个变化传播到ghc mod,然后传播到ghcmod.vim吗?因为当我在vim中运行语法检查器或ghc mod类型检查器时,我会收到找不到模块的错误。
我正在运行ghc 7.10.1。
您要查找的标志是-i<dir>
:
% ghci --help
Usage:
ghci [command-line-options-and-input-files]
...
In addition, ghci accepts most of the command-line options that plain
GHC does. Some of the options that are commonly used are:
-i<dir> Search for imported modules in the directory <dir>.
例如
% ls src
Bar.hs Foo.hs
% ghci -isrc
GHCi, version 7.8.2: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
λ :l Foo
[1 of 1] Compiling Foo ( src/Foo.hs, interpreted )
Ok, modules loaded: Foo.
λ :l Bar
[1 of 2] Compiling Foo ( src/Foo.hs, interpreted )
[2 of 2] Compiling Bar ( src/Bar.hs, interpreted )
Ok, modules loaded: Foo, Bar.
您也可以从ghcmod.vim
中向ghc-mod
传递-i<dir>
标志
如果要提供GHC选项,请设置
g:ghcmod_ghc_options
。let g:ghcmod_ghc_options = ['-idir1', '-idir2']
此外,还有缓冲区本地版本
b:ghcmod_ghc_options
。autocmd BufRead,BufNewFile ~/.xmonad/* call s:add_xmonad_path() function! s:add_xmonad_path() if !exists('b:ghcmod_ghc_options') let b:ghcmod_ghc_options = [] endif call add(b:ghcmod_ghc_options, '-i' . expand('~/.xmonad/lib')) endfunction