[−][src]Struct protobuf::reflect::FieldDescriptor
Field descriptor.
Can be used for runtime reflection.
Implementations
impl FieldDescriptor
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pub fn proto(&self) -> &'static FieldDescriptorProto
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Get .proto
description of field
pub fn name(&self) -> &'static str
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Field name as specified in .proto
file
pub fn is_repeated(&self) -> bool
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If this field repeated?
pub fn has_field(&self, m: &dyn Message) -> bool
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Check if field is set in given message.
For repeated field or map field return true
if
collection is not empty.
Panics
If this field belongs to a different message type.
pub fn len_field(&self, m: &dyn Message) -> usize
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Return length of repeated field.
For singualar field return 1
if field is set and 0
otherwise.
Panics
If this field belongs to a different message type.
pub fn get_message<'a>(&self, m: &'a dyn Message) -> &'a dyn Message
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Get message field or default instance if field is unset.
Panics
If this field belongs to a different message type or field type is not message.
pub fn get_enum(&self, m: &dyn Message) -> &'static EnumValueDescriptor
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Get enum
field.
Panics
If this field belongs to a different message type
or field type is not singular enum
.
pub fn get_str<'a>(&self, m: &'a dyn Message) -> &'a str
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Get string
field.
Panics
If this field belongs to a different message type
or field type is not singular string
.
pub fn get_bytes<'a>(&self, m: &'a dyn Message) -> &'a [u8]
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Get bytes
field.
Panics
If this field belongs to a different message type
or field type is not singular bytes
.
pub fn get_u32(&self, m: &dyn Message) -> u32
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Get u32
field.
Panics
If this field belongs to a different message type
or field type is not singular u32
.
pub fn get_u64(&self, m: &dyn Message) -> u64
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Get u64
field.
Panics
If this field belongs to a different message type
or field type is not singular u64
.
pub fn get_i32(&self, m: &dyn Message) -> i32
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Get i32
field.
Panics
If this field belongs to a different message type
or field type is not singular i32
.
pub fn get_i64(&self, m: &dyn Message) -> i64
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Get i64
field.
Panics
If this field belongs to a different message type
or field type is not singular i64
.
pub fn get_bool(&self, m: &dyn Message) -> bool
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Get bool
field.
Panics
If this field belongs to a different message type or
field type is not singular bool
.
pub fn get_f32(&self, m: &dyn Message) -> f32
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Get float
field.
Panics
If this field belongs to a different message type or
field type is not singular float
.
pub fn get_f64(&self, m: &dyn Message) -> f64
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Get double
field.
Panics
If this field belongs to a different message type
or field type is not singular double
.
pub fn get_reflect<'a>(&self, m: &'a dyn Message) -> ReflectFieldRef<'a>
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Auto Trait Implementations
impl !RefUnwindSafe for FieldDescriptor
impl !Send for FieldDescriptor
impl Sync for FieldDescriptor
impl Unpin for FieldDescriptor
impl !UnwindSafe for FieldDescriptor
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,