Monad transformers.

8 files changed, 170 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
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+.stack-work/*
diff --git a/LICENSE b/LICENSE
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+++ b/LICENSE
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+Copyright Author name here (c) 2016
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Author name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/Setup.hs b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
diff --git a/app/Main.hs b/app/Main.hs
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+module Main where
+
+import Lib
+
+main :: IO ()
+main = undefined
diff --git a/rougelike.cabal b/rougelike.cabal
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+++ b/rougelike.cabal
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+name:                rougelike
+version:             0.1.0.0
+synopsis:            Initial project template from stack
+description:         Please see README.md
+homepage:            http://github.com/githubuser/rougelike#readme
+license:             BSD3
+license-file:        LICENSE
+author:              Author name here
+maintainer:          example@example.com
+copyright:           2016 Author Here
+category:            Web
+build-type:          Simple
+-- extra-source-files:
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Lib
+  build-depends:
+                base
+              , lens
+              , data-default
+              , transformers
+              , mtl
+  default-language:    Haskell2010
+
+executable rougelike-exe
+  hs-source-dirs:      app
+  main-is:             Main.hs
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+  build-depends:       base
+                     , rougelike
+  default-language:    Haskell2010
+
+test-suite rougelike-test
+  type:                exitcode-stdio-1.0
+  hs-source-dirs:      test
+  main-is:             Spec.hs
+  build-depends:       base
+                     , rougelike
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/githubuser/rougelike
diff --git a/src/Lib.hs b/src/Lib.hs
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+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
+module Lib where
+
+import Control.Lens (makeLenses)
+import Control.Monad.Identity (Identity(..))
+import Control.Monad.Reader (ReaderT(..), runReaderT)
+import Control.Monad.Reader.Class (MonadReader(..))
+import Control.Monad.State.Class (MonadState(..))
+import Control.Monad.State.Strict (StateT(..), evalStateT)
+import Data.Default (Default(..))
+
+data Position = Position { _x :: Int, _y :: Int }
+                deriving (Show, Read)
+instance Default Position where
+    def = Position 0 0
+makeLenses ''Position
+
+data Player = Player {
+      position :: Position}
+              deriving (Show, Read)
+instance Default Player where
+    def = Player { position = def }
+makeLenses ''Player
+
+newtype Config = Config String
+    deriving (Show)
+
+data World = World {
+      player :: Player}
+             deriving (Show, Read)
+instance Default World where
+    def = World { player = def }
+makeLenses ''World
+
+newtype App a = App {
+      runApp :: StateT World (ReaderT Config Identity) a}
+    deriving ( Applicative
+             , Functor
+             , Monad
+             , MonadState World
+             , MonadReader Config
+             )
+
+evalApp :: App a -> World -> Config -> a
+evalApp f world config =
+    runIdentity (runReaderT (evalStateT (runApp f) world) config)
diff --git a/stack.yaml b/stack.yaml
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+# For more information, see: http://docs.haskellstack.org/en/stable/yaml_configuration.html
+
+# Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
+resolver: lts-5.3
+
+# Local packages, usually specified by relative directory name
+packages:
+- '.'
+
+# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
+extra-deps: []
+
+# Override default flag values for local packages and extra-deps
+flags: {}
+
+# Extra package databases containing global packages
+extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: >= 1.0.0
+
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor
diff --git a/test/Spec.hs b/test/Spec.hs
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+main :: IO ()
+main = putStrLn "Test suite not yet implemented"