git.iko.soy/rowtype-yoga/purescript-native
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rowtype-yoga/purescript-native/src/Language/PureScript/Sugar.hs
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1-----------------------------------------------------------------------------
2--
3-- Module : Language.PureScript.Sugar
4-- Copyright : (c) Phil Freeman 2013
5-- License : MIT
6--
7-- Maintainer : Phil Freeman <paf31@cantab.net>
8-- Stability : experimental
9-- Portability :
10--
11-- |
12-- Desugaring passes
13--
14-----------------------------------------------------------------------------
16module Language.PureScript.Sugar (desugar, module S) where
18import Control.Monad
20import Language.PureScript.Declarations
21import Language.PureScript.Errors
23import Language.PureScript.Sugar.Operators as S
24import Language.PureScript.Sugar.DoNotation as S
25import Language.PureScript.Sugar.CaseDeclarations as S
26import Language.PureScript.Sugar.TypeDeclarations as S
27import Language.PureScript.Sugar.BindingGroups as S
28import Language.PureScript.Sugar.TypeClasses as S
29import Language.PureScript.Sugar.Names as S
31import Control.Category ((>>>))
33-- |
34-- The desugaring pipeline proceeds as follows:
35--
36-- * Introduce type synonyms for type class dictionaries
37--
38-- * Rebracket user-defined binary operators
39--
40-- * Desugar do-notation using the @Prelude.Monad@ type class
41--
42-- * Desugar top-level case declarations into explicit case expressions
43--
44-- * Desugar type declarations into value declarations with explicit type annotations
45--
46-- * Group mutually recursive value and data declarations into binding groups.
47--
48-- * Qualify any unqualified names and types
49--
50desugar :: [Module] -> Either ErrorStack [Module]
51desugar = removeSignedLiterals
52 >>> desugarDo
53 >=> desugarCasesModule
54 >=> desugarTypeDeclarationsModule
55 >=> desugarImports
56 >=> rebracket
57 >=> desugarTypeClasses
58 >=> createBindingGroupsModule