我目前正在Haskell上开发small application。我已经记录了main
。但cabal haddock --executables
显示错误:
Running Haddock for XComposeChecker-0.1...
Preprocessing executables for XComposeChecker-0.1...
Warning: The documentation for the following packages are not installed. No
links will be generated to these packages: rts-1.0
haddock coverage for ./XComposeChecker.hs: 8/13 62%
Warning: Couldn't find TyThing for exported Main.main: main:Main.main; not documenting.
haddock coverage for dist/build/tmp3599/./Main.hs: 1/2 50%
Warning: Main: could not find link destinations for:
Main.main
Documentation created: dist/doc/html/XComposeChecker/checker/index.html
Main.hs
本身:
import Text.ParserCombinators.Parsec
import System.Directory
import System.FilePath
import XComposeChecker
-- | Main
main = do
homedir <- getHomeDirectory
result <- parseFromFile parseXComposeFile (joinPath [homedir, ".XCompose"])
print result
为什么haddock
无法找到main
的文档?
在ghc-7.0.4
上使用cabal-1.10.2.0
,haddock-2.9.2
和Fedora 17
。
答案 0 :(得分:3)
Haddock文档必须附加到类型签名。试试这个:
-- | Main
main :: IO ()
main = do
print 3
添加:还需要添加:
module Main(main) where
在Main.hs
的开头,允许haddock
查找并记录main
函数。