Trait FromValueOptional

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pub trait FromValueOptional<'a>: StaticType + Sized {
    // Required method
    unsafe fn from_value_optional(: &'a Value) -> Option<Self>;
}
Expand description

Extracts a value.

Types that don’t support a None value always return Some.

Required Methods§

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unsafe fn from_value_optional(: &'a Value) -> Option<Self>

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

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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 bool

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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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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 i32

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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 u8

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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 u64

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unsafe fn from_value_optional(value: &'a Value) -> Option<Self>

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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 Vec<GString>

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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>

Implementors§