haskell - cabal 报告找不到模块

我已经配置了下面的阴谋文件，但是当我执行cabal build时，我只是在鲜美的文件中出现了错误，说Could not find module TicTac.Essential，这里我错过了什么？

name:                tdd
version:             0.1.0.0
cabal-version:       >=1.8
-- synopsis:
-- description:
-- license:
license-file:        LICENSE
author:              adfaf
maintainer:          [email protected]
-- copyright:
-- category:
build-type:          Simple
extra-source-files:  README

library
  hs-source-dirs:      src
  build-depends:       base >= 4
  ghc-options:         -Wall
  exposed-modules      TicTac.Essential
  default-language:    Haskell2010

test-suite Tasty
  type:                exitcode-stdio-1.0
  build-depends:       base >=4.6 && <4.7, tasty, tasty-quickcheck, tdd
  hs-source-dirs:      test
  main-is:             Tasty.hs

tasty.hs的来源

module Main where

import Test.Tasty
import Test.Tasty.QuickCheck as QC

import TicTac.Essential

最佳答案

您在“暴露模块”之后丢失了一个冒号。应该

library
  hs-source-dirs:      src
  build-depends:       base >= 4
  ghc-options:         -Wall
  exposed-modules:     TicTac.Essential
  default-language:    Haskell2010