Trait FromValue

pub unsafe trait FromValue<'a>: Sized {
    type Checker: ValueTypeChecker;

    // Required method
    unsafe fn from_value(value: &'a Value) -> Self;
}

Trait to retrieve the contained value from a Value.

Usually this would not be used directly but from the get function on a Value

Required Associated Types

type Checker: ValueTypeChecker

Value type checker.

Required Methods

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

Safety

Self::Checker::check() must be called first and must not fail.

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.

Implementations on Foreign Types

impl<'a> FromValue<'a> for &'a str

type Checker = GenericValueTypeOrNoneChecker<&'a str>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for &'a [GStringPtr]

type Checker = GenericValueTypeChecker<&'a [GStringPtr]>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for bool

type Checker = GenericValueTypeChecker<bool>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for char

type Checker = CharTypeChecker

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for f32

type Checker = GenericValueTypeChecker<f32>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for f64

type Checker = GenericValueTypeChecker<f64>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for i8

type Checker = GenericValueTypeChecker<i8>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for i32

type Checker = GenericValueTypeChecker<i32>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for i64

type Checker = GenericValueTypeChecker<i64>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for u8

type Checker = GenericValueTypeChecker<u8>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for u32

type Checker = GenericValueTypeChecker<u32>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for u64

type Checker = GenericValueTypeChecker<u64>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for Box<str>

type Checker = GenericValueTypeOrNoneChecker<Box<str>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for String

type Checker = GenericValueTypeOrNoneChecker<String>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for Vec<GString>

type Checker = GenericValueTypeChecker<Vec<GString>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for Vec<String>

type Checker = GenericValueTypeChecker<Vec<String>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for NonNull<Pointee>

type Checker = GenericValueTypeOrNoneChecker<NonNull<c_void>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for PathBuf

type Checker = GenericValueTypeOrNoneChecker<PathBuf>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for NonZeroI8

type Checker = GenericValueTypeOrNoneChecker<NonZero<i8>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for NonZeroI32

type Checker = GenericValueTypeOrNoneChecker<NonZero<i32>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for NonZeroI64

type Checker = GenericValueTypeOrNoneChecker<NonZero<i64>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for NonZeroU8

type Checker = GenericValueTypeOrNoneChecker<NonZero<u8>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for NonZeroU32

type Checker = GenericValueTypeOrNoneChecker<NonZero<u32>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a> FromValue<'a> for NonZeroU64

type Checker = GenericValueTypeOrNoneChecker<NonZero<u64>>

unsafe fn from_value(value: &'a Value) -> Self

impl<'a, 'b> FromValue<'a> for Vec<&'b FlagsValue>

type Checker = FlagsTypeChecker

unsafe fn from_value(value: &'a Value) -> Self

impl<'a, T, C, E> FromValue<'a> for Option<T>

where T: FromValue<'a, Checker = C> + StaticType, C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError<E>>, E: Error + Send + Sized + 'static,

Blanket implementation for all optional types.

type Checker = ValueTypeOrNoneChecker<T, C, E>

unsafe fn from_value(value: &'a Value) -> Self

Implementors

impl<'a> FromValue<'a> for &'a GStr

type Checker = GenericValueTypeOrNoneChecker<&'a GStr>

impl<'a> FromValue<'a> for &'a Value

type Checker = NopChecker

impl<'a> FromValue<'a> for NormalizeMode

type Checker = GenericValueTypeChecker<NormalizeMode>

impl<'a> FromValue<'a> for UnicodeBreakType

type Checker = GenericValueTypeChecker<UnicodeBreakType>

impl<'a> FromValue<'a> for UnicodeScript

type Checker = GenericValueTypeChecker<UnicodeScript>

impl<'a> FromValue<'a> for UnicodeType

type Checker = GenericValueTypeChecker<UnicodeType>

impl<'a> FromValue<'a> for StrV

type Checker = GenericValueTypeChecker<StrV>

impl<'a> FromValue<'a> for BindingFlags

type Checker = GenericValueTypeChecker<BindingFlags>

impl<'a> FromValue<'a> for GString

type Checker = GenericValueTypeOrNoneChecker<GString>

impl<'a> FromValue<'a> for IOCondition

type Checker = GenericValueTypeChecker<IOCondition>

impl<'a> FromValue<'a> for ILong

type Checker = GenericValueTypeChecker<ILong>

impl<'a> FromValue<'a> for ULong

type Checker = GenericValueTypeChecker<ULong>

impl<'a> FromValue<'a> for BoxedValue

type Checker = GenericValueTypeOrNoneChecker<BoxedValue>

impl<'a> FromValue<'a> for Value

type Checker = NopChecker

impl<'a> FromValue<'a> for Pointer

type Checker = GenericValueTypeChecker<*mut c_void>

impl<'a, 'b> FromValue<'a> for &'b EnumValue

type Checker = EnumTypeChecker

impl<'a, 'input: 'a> FromValue<'a> for MatchInfo<'input>

type Checker = GenericValueTypeOrNoneChecker<MatchInfo<'input>>