Safe Haskell | Safe-Inferred |
---|---|
Language | Haskell2010 |
Handy functions for creating much Core syntax
Synopsis
- mkCoreLet :: CoreBind -> CoreExpr -> CoreExpr
- mkCoreLets :: [CoreBind] -> CoreExpr -> CoreExpr
- mkCoreApp :: SDoc -> CoreExpr -> CoreExpr -> CoreExpr
- mkCoreApps :: CoreExpr -> [CoreExpr] -> CoreExpr
- mkCoreConApps :: DataCon -> [CoreExpr] -> CoreExpr
- mkCoreLams :: [CoreBndr] -> CoreExpr -> CoreExpr
- mkWildCase :: CoreExpr -> Scaled Type -> Type -> [CoreAlt] -> CoreExpr
- mkIfThenElse :: CoreExpr -> CoreExpr -> CoreExpr -> CoreExpr
- mkWildValBinder :: Mult -> Type -> Id
- mkWildEvBinder :: PredType -> EvVar
- mkSingleAltCase :: CoreExpr -> Id -> AltCon -> [Var] -> CoreExpr -> CoreExpr
- sortQuantVars :: [Var] -> [Var]
- castBottomExpr :: CoreExpr -> Type -> CoreExpr
- mkLitRubbish :: Type -> Maybe CoreExpr
- mkWordExpr :: Platform -> Integer -> CoreExpr
- mkIntExpr :: Platform -> Integer -> CoreExpr
- mkIntExprInt :: Platform -> Int -> CoreExpr
- mkUncheckedIntExpr :: Integer -> CoreExpr
- mkIntegerExpr :: Platform -> Integer -> CoreExpr
- mkNaturalExpr :: Platform -> Integer -> CoreExpr
- mkFloatExpr :: Float -> CoreExpr
- mkDoubleExpr :: Double -> CoreExpr
- mkCharExpr :: Char -> CoreExpr
- mkStringExpr :: MonadThings m => String -> m CoreExpr
- mkStringExprFS :: MonadThings m => FastString -> m CoreExpr
- mkStringExprFSWith :: MkStringIds -> FastString -> CoreExpr
- data MkStringIds = MkStringIds {
- unpackCStringId :: !Id
- unpackCStringUtf8Id :: !Id
- getMkStringIds :: Applicative m => (Name -> m Id) -> m MkStringIds
- data FloatBind
- wrapFloat :: FloatBind -> CoreExpr -> CoreExpr
- wrapFloats :: [FloatBind] -> CoreExpr -> CoreExpr
- floatBindings :: FloatBind -> [Var]
- mkCoreVarTupTy :: [Id] -> Type
- mkCoreTup :: [CoreExpr] -> CoreExpr
- mkCoreUbxTup :: [Type] -> [CoreExpr] -> CoreExpr
- mkCoreUbxSum :: Int -> Int -> [Type] -> CoreExpr -> CoreExpr
- mkCoreTupBoxity :: Boxity -> [CoreExpr] -> CoreExpr
- unitExpr :: CoreExpr
- mkBigCoreVarTup :: [Id] -> CoreExpr
- mkBigCoreVarTup1 :: [Id] -> CoreExpr
- mkBigCoreVarTupTy :: [Id] -> Type
- mkBigCoreTupTy :: [Type] -> Type
- mkBigCoreTup :: [CoreExpr] -> CoreExpr
- mkSmallTupleSelector :: [Id] -> Id -> Id -> CoreExpr -> CoreExpr
- mkSmallTupleCase :: [Id] -> CoreExpr -> Id -> CoreExpr -> CoreExpr
- mkTupleSelector :: [Id] -> Id -> Id -> CoreExpr -> CoreExpr
- mkTupleSelector1 :: [Id] -> Id -> Id -> CoreExpr -> CoreExpr
- mkTupleCase :: UniqSupply -> [Id] -> CoreExpr -> Id -> CoreExpr -> CoreExpr
- mkNilExpr :: Type -> CoreExpr
- mkConsExpr :: Type -> CoreExpr -> CoreExpr -> CoreExpr
- mkListExpr :: Type -> [CoreExpr] -> CoreExpr
- mkFoldrExpr :: MonadThings m => Type -> Type -> CoreExpr -> CoreExpr -> CoreExpr -> m CoreExpr
- mkBuildExpr :: (MonadFail m, MonadThings m, MonadUnique m) => Type -> ((Id, Type) -> (Id, Type) -> m CoreExpr) -> m CoreExpr
- mkNonEmptyListExpr :: Type -> CoreExpr -> [CoreExpr] -> CoreExpr
- mkNothingExpr :: Type -> CoreExpr
- mkJustExpr :: Type -> CoreExpr -> CoreExpr
- mkRuntimeErrorApp :: Id -> Type -> String -> CoreExpr
- mkImpossibleExpr :: Type -> CoreExpr
- mkAbsentErrorApp :: Type -> String -> CoreExpr
- errorIds :: [Id]
- rEC_CON_ERROR_ID :: Id
- rUNTIME_ERROR_ID :: Id
- nON_EXHAUSTIVE_GUARDS_ERROR_ID :: Id
- nO_METHOD_BINDING_ERROR_ID :: Id
- pAT_ERROR_ID :: Id
- rEC_SEL_ERROR_ID :: Id
- aBSENT_ERROR_ID :: Id
- tYPE_ERROR_ID :: Id
- aBSENT_SUM_FIELD_ERROR_ID :: Id
Constructing normal syntax
mkCoreLet :: CoreBind -> CoreExpr -> CoreExpr Source #
Bind a binding group over an expression, using a let
or case
as
appropriate (see GHC.Core)
mkCoreLets :: [CoreBind] -> CoreExpr -> CoreExpr Source #
Bind a list of binding groups over an expression. The leftmost binding group becomes the outermost group in the resulting expression
Construct an expression which represents the application of one expression to the other
Respects the let/app invariant by building a case expression where necessary See Note [Core let/app invariant] in GHC.Core
mkCoreApps infixl 4 Source #
Construct an expression which represents the application of a number of expressions to another. The leftmost expression in the list is applied first
Respects the let/app invariant by building a case expression where necessary See Note [Core let/app invariant] in GHC.Core
mkCoreConApps :: DataCon -> [CoreExpr] -> CoreExpr Source #
Construct an expression which represents the application of a number of expressions to that of a data constructor expression. The leftmost expression in the list is applied first
mkCoreLams :: [CoreBndr] -> CoreExpr -> CoreExpr Source #
Create a lambda where the given expression has a number of variables bound over it. The leftmost binder is that bound by the outermost lambda in the result
Make a case expression whose case binder is unused The alts and res_ty should not have any occurrences of WildId
mkWildValBinder :: Mult -> Type -> Id Source #
Make a wildcard binder. This is typically used when you need a binder that you expect to use only at a *binding* site. Do not use it at occurrence sites because it has a single, fixed unique, and it's very easy to get into difficulties with shadowing. That's why it is used so little.
See Note [WildCard binders] in GHC.Core.Opt.Simplify.Env
mkWildEvBinder :: PredType -> EvVar Source #
sortQuantVars :: [Var] -> [Var] Source #
Sort the variables, putting type and covars first, in scoped order, and then other Ids
It is a deterministic sort, meaining it doesn't look at the values of Uniques. For explanation why it's important See Note [Unique Determinism] in GHC.Types.Unique.
Constructing boxed literals
mkWordExpr :: Platform -> Integer -> CoreExpr Source #
Create a CoreExpr
which will evaluate to the a Word
with the given value
mkIntExpr :: Platform -> Integer -> CoreExpr Source #
Create a CoreExpr
which will evaluate to the given Int
mkIntExprInt :: Platform -> Int -> CoreExpr Source #
Create a CoreExpr
which will evaluate to the given Int
mkUncheckedIntExpr :: Integer -> CoreExpr Source #
Create a CoreExpr
which will evaluate to the given Int
. Don't check
that the number is in the range of the target platform Int
mkIntegerExpr :: Platform -> Integer -> CoreExpr Source #
Create a CoreExpr
which will evaluate to the given Integer
mkNaturalExpr :: Platform -> Integer -> CoreExpr Source #
Create a CoreExpr
which will evaluate to the given Natural
mkDoubleExpr :: Double -> CoreExpr Source #
Create a CoreExpr
which will evaluate to the given Double
mkStringExpr :: MonadThings m => String -> m CoreExpr Source #
Create a CoreExpr
which will evaluate to the given String
mkStringExprFS :: MonadThings m => FastString -> m CoreExpr Source #
Create a CoreExpr
which will evaluate to a string morally equivalent to the given FastString
mkStringExprFSWith :: MkStringIds -> FastString -> CoreExpr Source #
data MkStringIds Source #
getMkStringIds :: Applicative m => (Name -> m Id) -> m MkStringIds Source #
Floats
Instances
wrapFloats :: [FloatBind] -> CoreExpr -> CoreExpr Source #
Applies the floats from right to left. That is wrapFloats [b1, b2, …, bn]
u = let b1 in let b2 in … in let bn in u
floatBindings :: FloatBind -> [Var] Source #
Constructing small tuples
mkCoreVarTupTy :: [Id] -> Type Source #
Build the type of a small tuple that holds the specified variables One-tuples are flattened; see Note [Flattening one-tuples]
mkCoreTup :: [CoreExpr] -> CoreExpr Source #
Build a small tuple holding the specified expressions One-tuples are flattened; see Note [Flattening one-tuples]
mkCoreUbxTup :: [Type] -> [CoreExpr] -> CoreExpr Source #
Build a small unboxed tuple holding the specified expressions, with the given types. The types must be the types of the expressions. Do not include the RuntimeRep specifiers; this function calculates them for you. Does not flatten one-tuples; see Note [Flattening one-tuples]
mkCoreUbxSum :: Int -> Int -> [Type] -> CoreExpr -> CoreExpr Source #
Build an unboxed sum.
Alternative number ("alt") starts from 1.
mkCoreTupBoxity :: Boxity -> [CoreExpr] -> CoreExpr Source #
Make a core tuple of the given boxity; don't flatten 1-tuples
Constructing big tuples
mkBigCoreVarTup :: [Id] -> CoreExpr Source #
Build a big tuple holding the specified variables One-tuples are flattened; see Note [Flattening one-tuples]
mkBigCoreVarTup1 :: [Id] -> CoreExpr Source #
mkBigCoreVarTupTy :: [Id] -> Type Source #
Build the type of a big tuple that holds the specified variables One-tuples are flattened; see Note [Flattening one-tuples]
mkBigCoreTupTy :: [Type] -> Type Source #
Build the type of a big tuple that holds the specified type of thing One-tuples are flattened; see Note [Flattening one-tuples]
mkBigCoreTup :: [CoreExpr] -> CoreExpr Source #
Build a big tuple holding the specified expressions One-tuples are flattened; see Note [Flattening one-tuples]
Deconstructing small tuples
mkSmallTupleSelector :: [Id] -> Id -> Id -> CoreExpr -> CoreExpr Source #
mkSmallTupleSelector1
is like mkSmallTupleSelector
but one-tuples are NOT flattened (see Note [Flattening one-tuples])
Like mkTupleSelector
but for tuples that are guaranteed
never to be "big".
mkSmallTupleSelector [x] x v e = [| e |] mkSmallTupleSelector [x,y,z] x v e = [| case e of v { (x,y,z) -> x } |]
:: [Id] | The tuple args |
-> CoreExpr | Body of the case |
-> Id | A variable of the same type as the scrutinee |
-> CoreExpr | Scrutinee |
-> CoreExpr |
As mkTupleCase
, but for a tuple that is small enough to be guaranteed
not to need nesting.
Deconstructing big tuples
:: [Id] | The |
-> Id | The |
-> Id | A variable of the same type as the scrutinee |
-> CoreExpr | Scrutinee |
-> CoreExpr | Selector expression |
mkTupleSelector1
is like mkTupleSelector
but one-tuples are NOT flattened (see Note [Flattening one-tuples])
Builds a selector which scrutises the given expression and extracts the one name from the list given. If you want the no-shadowing rule to apply, the caller is responsible for making sure that none of these names are in scope.
If there is just one Id
in the tuple, then the selector is
just the identity.
If necessary, we pattern match on a "big" tuple.
A tuple selector is not linear in its argument. Consequently, the case
expression built by mkTupleSelector
must consume its scrutinee Many
times. And all the argument variables must have multiplicity Many
.
:: [Id] | The |
-> Id | The |
-> Id | A variable of the same type as the scrutinee |
-> CoreExpr | Scrutinee |
-> CoreExpr | Selector expression |
Builds a selector which scrutises the given expression and extracts the one name from the list given. If you want the no-shadowing rule to apply, the caller is responsible for making sure that none of these names are in scope.
If there is just one Id
in the tuple, then the selector is
just the identity.
If necessary, we pattern match on a "big" tuple.
A tuple selector is not linear in its argument. Consequently, the case
expression built by mkTupleSelector
must consume its scrutinee Many
times. And all the argument variables must have multiplicity Many
.
:: UniqSupply | For inventing names of intermediate variables |
-> [Id] | The tuple identifiers to pattern match on |
-> CoreExpr | Body of the case |
-> Id | A variable of the same type as the scrutinee |
-> CoreExpr | Scrutinee |
-> CoreExpr |
A generalization of mkTupleSelector
, allowing the body
of the case to be an arbitrary expression.
To avoid shadowing, we use uniques to invent new variables.
If necessary we pattern match on a "big" tuple.
Constructing list expressions
mkConsExpr :: Type -> CoreExpr -> CoreExpr -> CoreExpr Source #
Makes a list (:)
for lists of the specified type
mkListExpr :: Type -> [CoreExpr] -> CoreExpr Source #
Make a list containing the given expressions, where the list has the given type
:: MonadThings m | |
=> Type | Element type of the list |
-> Type | Fold result type |
-> CoreExpr | Cons function expression for the fold |
-> CoreExpr | Nil expression for the fold |
-> CoreExpr | List expression being folded acress |
-> m CoreExpr |
Make a fully applied foldr
expression
:: (MonadFail m, MonadThings m, MonadUnique m) | |
=> Type | Type of list elements to be built |
-> ((Id, Type) -> (Id, Type) -> m CoreExpr) | Function that, given information about the |
-> m CoreExpr |
Make a build
expression applied to a locally-bound worker function
Constructing non empty lists
Constructing Maybe expressions
mkNothingExpr :: Type -> CoreExpr Source #
Makes a Nothing for the specified type
Error Ids
mkImpossibleExpr :: Type -> CoreExpr Source #
pAT_ERROR_ID :: Id Source #
aBSENT_ERROR_ID :: Id Source #
tYPE_ERROR_ID :: Id Source #