By default, if the field name begins with an underscore, then the underscore will simply be removed (and the new first character lowercased if necessary).
Modulelens-family-th-0.5.3.2Haskell2010
Lens.Family.THCore
The shared functionality behind Lens.Family.TH and Lens.Family2.TH.
Synopsis
- value defaultNameTransform
- type LensTypeInfo
- type ConstructorFieldInfo
- value deriveLenses
- value makeTraversals
- Packagelens-family-th-0.5.3.2
- Exports5
- LanguageHaskell2010
- LicenceBSD-3-Clause
- SourceTHCore.hs
Information about the larger type the lens will operate on.
Information about the smaller type the lens will operate on.
value
deriveLenses The true workhorse of lens derivation. This macro is parameterized by a macro that derives signatures, as well as a function that filters and transforms names. Producing Nothing means that a lens should not be generated for the provided name.
Derive traversals for each constructor in a data or newtype declaration, Traversals will be named by prefixing the constructor name with an underscore.
Example usage:
$(makeTraversals ''Foo)