c8d5a4ff40
The compiler itself is under the GPLv2+; the support code that gets built into user programs is under the LGPLv2+. This matches the existing practice for the KRoC project. (As with Occade, I've used the new GPLv3-style license header in the source files, though, since that avoids having to update the FSF's postal address.)
56 lines
1.6 KiB
Haskell
56 lines
1.6 KiB
Haskell
{-
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Tock: a compiler for parallel languages
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Copyright (C) 2007 University of Kent
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 2 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>.
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-}
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-- | Simplify types in the AST.
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module SimplifyTypes (simplifyTypes) where
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import Control.Monad.State
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import Data.Generics
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import qualified AST as A
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import Pass
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import Types
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simplifyTypes :: A.Process -> PassM A.Process
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simplifyTypes = runPasses passes
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where
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passes =
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[ ("Resolve types in AST", resolveNamedTypes)
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, ("Resolve types in state", rntState)
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]
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-- | Turn named data types into their underlying types.
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resolveNamedTypes :: Data t => t -> PassM t
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resolveNamedTypes = doGeneric `extM` doType
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where
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doGeneric :: Data t => t -> PassM t
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doGeneric = makeGeneric resolveNamedTypes
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doType :: A.Type -> PassM A.Type
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doType t@(A.UserDataType _) = underlyingType t
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doType t = doGeneric t
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-- | Resolve named types in CompState.
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rntState :: A.Process -> PassM A.Process
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rntState p
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= do st <- get
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st' <- resolveNamedTypes st
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put st'
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return p
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