Trait glib::value::FromValueOptional
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pub trait FromValueOptional<'a>: StaticType + Sized { unsafe fn from_value_optional(_: &'a Value) -> Option<Self>; }
Extracts a value.
Types that don't support a None
value always return Some
.
Required Methods
unsafe fn from_value_optional(_: &'a Value) -> Option<Self>
Implementations on Foreign Types
impl<'a> FromValueOptional<'a> for String
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for &'a str
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for Vec<String>
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for bool
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for i8
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for u8
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for i32
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for u32
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for i64
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for u64
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for f32
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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impl<'a> FromValueOptional<'a> for f64
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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>
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Implementors
impl<'a> FromValueOptional<'a> for IOCondition
impl<'a> FromValueOptional<'a> for Type
impl<'a> FromValueOptional<'a> for &'a AnyValue
impl<'a> FromValueOptional<'a> for &'a AnySendValue