Copyright	Will Thompson and Iñaki García Etxebarria
License	LGPL-2.1
Maintainer	Iñaki García Etxebarria
Safe Haskell	None
Language	Haskell2010

GI.Gtk.Objects.TryExpression

Contents

Exported types
Methods
- new

Description

A GtkExpression that tries to evaluate each of its expressions until it succeeds.

If all expressions fail to evaluate, the GtkTryExpression's evaluation fails as well.

Since: 4.22

Synopsis

newtype TryExpression = TryExpression (ManagedPtr TryExpression)
class (BoxedPtr o, TypedObject o, IsDescendantOf TryExpression o) => IsTryExpression o
toTryExpression :: (MonadIO m, IsTryExpression o) => o -> m TryExpression
tryExpressionNew :: (HasCallStack, MonadIO m) => [Expression] -> m TryExpression

Exported types

newtype TryExpression Source #

Memory-managed wrapper type.

Constructors

TryExpression (ManagedPtr TryExpression)

Instances

Instances details

Eq TryExpression Source #
Instance details Defined in GI.Gtk.Objects.TryExpression Methods (==) :: TryExpression -> TryExpression -> Bool Source # (/=) :: TryExpression -> TryExpression -> Bool Source #
BoxedPtr TryExpression Source #
Instance details Defined in GI.Gtk.Objects.TryExpression Methods boxedPtrCopy :: TryExpression -> IO TryExpression Source # boxedPtrFree :: TryExpression -> IO () Source #
ManagedPtrNewtype TryExpression Source #
Instance details Defined in GI.Gtk.Objects.TryExpression Methods toManagedPtr :: TryExpression -> ManagedPtr TryExpression Source #
TypedObject TryExpression Source #
Instance details Defined in GI.Gtk.Objects.TryExpression Methods glibType :: IO GType Source #
HasParentTypes TryExpression Source #
Instance details Defined in GI.Gtk.Objects.TryExpression
type ParentTypes TryExpression Source #
Instance details Defined in GI.Gtk.Objects.TryExpression type ParentTypes TryExpression = '[Expression]

class (BoxedPtr o, TypedObject o, IsDescendantOf TryExpression o) => IsTryExpression o Source #

Type class for types which can be safely cast to TryExpression, for instance with toTryExpression.

Instances

Instances details

(BoxedPtr o, TypedObject o, IsDescendantOf TryExpression o) => IsTryExpression o Source #
Instance details Defined in GI.Gtk.Objects.TryExpression

toTryExpression :: (MonadIO m, IsTryExpression o) => o -> m TryExpression Source #

Cast to TryExpression, for types for which this is known to be safe. For general casts, use castTo.

Methods

Click to display all available methods, including inherited ones

Expand

Methods

bind, evaluate, isStatic, ref, unref, watch.

Getters

getValueType.

Setters

None.

new

tryExpressionNew Source #

Arguments

:: (HasCallStack, MonadIO m)
=> [Expression]	`expressions`: The array of expressions
-> m TryExpression	Returns: a new `GtkExpression`

Creates a GtkExpression with an array of expressions.

When evaluated, the GtkTryExpression tries to evaluate each of its expressions until it succeeds. If all expressions fail to evaluate, the GtkTryExpression's evaluation fails as well.

The value type of the expressions in the array must match.

Since: 4.22