Copyright | (c) Microsoft |
---|---|

License | MIT |

Maintainer | adamsap@microsoft.com |

Stability | provisional |

Portability | portable |

Safe Haskell | Safe |

Language | Haskell98 |

- isScalar :: Type -> Bool
- isUnsigned :: Type -> Bool
- isSigned :: Type -> Bool
- isFloat :: Type -> Bool
- isString :: Type -> Bool
- isContainer :: Type -> Bool
- isList :: Type -> Bool
- isAssociative :: Type -> Bool
- isNullable :: Type -> Bool
- isStruct :: Type -> Bool
- isMetaName :: Type -> Bool
- fmapType :: (Type -> Type) -> Type -> Type
- foldMapFields :: Monoid m => (Field -> m) -> Type -> m
- foldMapStructFields :: Monoid m => (Field -> m) -> Declaration -> m
- foldMapType :: Monoid m => (Type -> m) -> Type -> m
- resolveAlias :: Declaration -> [Type] -> Type

# Type classification

Functions that test if a type belongs to a particular category. These functions will resolve type aliases and return answer based on the type the alias resolves to.

isContainer :: Type -> Bool Source #

Returns `True`

if the type represents a container (i.e. list, vector, set or map).

isStruct :: Type -> Bool Source #

Returns `True`

if the type represents a struct or a struct forward declaration.

# Type mapping

# Folds

foldMapStructFields :: Monoid m => (Field -> m) -> Declaration -> m Source #

Like `foldMapFields`

but takes a `Declaration`

as an argument instead of `Type`

.

foldMapType :: Monoid m => (Type -> m) -> Type -> m Source #

Maps all parts of a `Type`

to a `Monoid`

and combines the results.

#### Examples

For a type:

list<nullable<int32>>

the result is:

f (BT_List (BT_Nullable BT_Int32)) <> f (BT_Nullable BT_Int32) <> f BT_Int32

`foldMapType`

resolves type aliases. E.g. given the following type alias
declaration (Bond IDL syntax):

using Array<T, N> = vector<T>;

the result for the following type:

Array<int32, 10>

is:

f (BT_UserDefined Alias{..} [BT_Int32, BT_IntTypeArg 10]) <> f (BT_Vector BT_Int32) <> f BT_Int32

# Helper functions

resolveAlias :: Declaration -> [Type] -> Type Source #

Resolves a type alias declaration with given type arguments. Note that the function resolves one level of aliasing and thus may return a type alias.