Enum prost_reflect::Value

pub enum Value {
    Bool(bool),
    I32(i32),
    I64(i64),
    U32(u32),
    U64(u64),
    F32(f32),
    F64(f64),
    String(String),
    Bytes(Bytes),
    EnumNumber(i32),
    Message(DynamicMessage),
    List(Vec<Value>),
    Map(HashMap<MapKey, Value>),
}

A dynamically-typed protobuf value.

Note this type may map to multiple possible protobuf wire formats, so it must be serialized as part of a DynamicMessage.

Variants

Bool(bool)

A boolean value, encoded as the bool protobuf type.

I32(i32)

A 32-bit signed integer, encoded as one of the int32, sint32 or sfixed32 protobuf types.

I64(i64)

A 64-bit signed integer, encoded as one of the int64, sint64 or sfixed64 protobuf types.

U32(u32)

A 32-bit unsigned integer, encoded as one of the uint32 or ufixed32 protobuf types.

U64(u64)

A 64-bit unsigned integer, encoded as one of the uint64 or ufixed64 protobuf types.

F32(f32)

A 32-bit floating point number, encoded as the float protobuf type.

F64(f64)

A 64-bit floating point number, encoded as the double protobuf type.

String(String)

A string, encoded as the string protobuf type.

Bytes(Bytes)

A byte string, encoded as the bytes protobuf type.

EnumNumber(i32)

An enumeration value, encoded as a protobuf enum.

Message(DynamicMessage)

A protobuf message.

List(Vec<Value>)

A list of values, encoded as a protobuf repeated field.

Map(HashMap<MapKey, Value>)

A map of values, encoded as a protobuf map field.

Implementations

impl Value

pub fn default_value_for_field(field_desc: &FieldDescriptor) -> Self

Returns the default value for the given protobuf field.

This is equivalent to default_value except for the following cases:

• If the field is a map, an empty map is returned.
• If the field is repeated, an empty list is returned.
• If the field has a custom default value specified, that is returned (proto2 only).

pub fn default_value_for_extension(extension_desc: &ExtensionDescriptor) -> Self

Returns the default value for the given protobuf extension field.

See default_value_for_field for more details.

pub fn default_value(kind: &Kind) -> Self

Returns the default value for the given protobuf type kind.

Unlike default_value_for_field, this method does not look at field cardinality, so it will never return a list or map.

pub fn is_default_for_field(&self, field_desc: &FieldDescriptor) -> bool

Returns true if this is the default value for the given protobuf field.

pub fn is_default_for_extension(
    &self,
    extension_desc: &ExtensionDescriptor
) -> bool

Returns true if this is the default value for the given protobuf extension field.

pub fn is_default(&self, kind: &Kind) -> bool

Returns true if this is the default value for the given protobuf type kind.

pub fn is_valid_for_field(&self, field_desc: &FieldDescriptor) -> bool

Returns true if this value can be set for a given field.

Note this only checks if the value can be successfully encoded. It doesn’t check, for example, that enum values are in the defined range.

pub fn is_valid_for_extension(
    &self,
    extension_desc: &ExtensionDescriptor
) -> bool

Returns true if this value can be set for a given extension field.

See is_valid_for_field for more details.

pub fn is_valid(&self, kind: &Kind) -> bool

Returns true if this value can be encoded as the given Kind.

Unlike is_valid_for_field, this method does not look at field cardinality, so it will never return true for lists or maps.

pub fn as_bool(&self) -> Option<bool>

Returns the value if it is a Value::Bool, or None if it is any other type.

pub fn as_bool_mut(&mut self) -> Option<&mut bool>

Returns a mutable reference to the value if it is a Value::Bool, or None if it is any other type.

pub fn as_u32(&self) -> Option<u32>

Returns the value if it is a Value::U32, or None if it is any other type.

pub fn as_u32_mut(&mut self) -> Option<&mut u32>

Returns a mutable reference to the value if it is a Value::U32, or None if it is any other type.

pub fn as_u64(&self) -> Option<u64>

Returns the value if it is a Value::U64, or None if it is any other type.

pub fn as_u64_mut(&mut self) -> Option<&mut u64>

Returns a mutable reference to the value if it is a Value::U64, or None if it is any other type.

pub fn as_i64(&self) -> Option<i64>

Returns the value if it is a Value::I64, or None if it is any other type.

pub fn as_i64_mut(&mut self) -> Option<&mut i64>

Returns a mutable reference to the value if it is a Value::I64, or None if it is any other type.

pub fn as_i32(&self) -> Option<i32>

Returns the value if it is a Value::I32, or None if it is any other type.

pub fn as_i32_mut(&mut self) -> Option<&mut i32>

Returns a mutable reference to the value if it is a Value::I32, or None if it is any other type.

pub fn as_f32(&self) -> Option<f32>

Returns the value if it is a Value::F32, or None if it is any other type.

pub fn as_f32_mut(&mut self) -> Option<&mut f32>

Returns a mutable reference to the value if it is a Value::F32, or None if it is any other type.

pub fn as_f64(&self) -> Option<f64>

Returns the value if it is a Value::F64, or None if it is any other type.

pub fn as_f64_mut(&mut self) -> Option<&mut f64>

Returns a mutable reference to the value if it is a Value::F64, or None if it is any other type.

pub fn as_enum_number(&self) -> Option<i32>

Returns the value if it is a Value::EnumNumber, or None if it is any other type.

pub fn as_enum_number_mut(&mut self) -> Option<&mut i32>

Returns a mutable reference to the value if it is a Value::EnumNumber, or None if it is any other type.

pub fn as_str(&self) -> Option<&str>

Returns the value if it is a Value::String, or None if it is any other type.

pub fn as_string_mut(&mut self) -> Option<&mut String>

Returns a mutable reference to the value if it is a Value::String, or None if it is any other type.

pub fn as_bytes(&self) -> Option<&Bytes>

Returns the value if it is a Value::Bytes, or None if it is any other type.

pub fn as_bytes_mut(&mut self) -> Option<&mut Bytes>

Returns a mutable reference to the value if it is a Value::Bytes, or None if it is any other type.

pub fn as_message(&self) -> Option<&DynamicMessage>

Returns a a reference to the value if it is a Value::Message, or None if it is any other type.

pub fn as_message_mut(&mut self) -> Option<&mut DynamicMessage>

Returns a mutable reference to the value if it is a Value::Message, or None if it is any other type.

pub fn as_list(&self) -> Option<&[Value]>

Returns a a reference to the value if it is a Value::List, or None if it is any other type.

pub fn as_list_mut(&mut self) -> Option<&mut Vec<Value>>

Returns a mutable reference to the value if it is a Value::List, or None if it is any other type.

pub fn as_map(&self) -> Option<&HashMap<MapKey, Value>>

Returns a a reference to the value if it is a Value::Map, or None if it is any other type.

pub fn as_map_mut(&mut self) -> Option<&mut HashMap<MapKey, Value>>

Returns a mutable reference to the value if it is a Value::Map, or None if it is any other type.

pub fn into_map_key(self) -> Option<MapKey>

Converts this value into a MapKey, or None if it is not a valid map key type.

Examples

assert_eq!(Value::I32(5).into_map_key(), Some(MapKey::I32(5)));
assert_eq!(Value::String("foo".to_owned()).into_map_key(), Some(MapKey::String("foo".to_owned())));
assert_eq!(Value::Bytes(Bytes::from_static(b"bytes")).into_map_key(), None);

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Value

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Value

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats this value using the protobuf text format.

Examples

assert_eq!(format!("{}", Value::String("hello".to_owned())), "\"hello\"");
assert_eq!(format!("{}", Value::List(vec![Value::I32(1), Value::I32(2)])), "[1,2]");
assert_eq!(format!("{}", Value::Map(HashMap::from_iter([(MapKey::I32(1), Value::U32(2))]))), "[{key:1,value:2}]");
// The alternate format specifier may be used to indent the output
assert_eq!(format!("{:#}", Value::Map(HashMap::from_iter([(MapKey::I32(1), Value::U32(2))]))), "[{\n  key: 1\n  value: 2\n}]");

impl From<MapKey> for Value

fn from(value: MapKey) -> Self

Converts to this type from the input type.

impl PartialEq<Value> for Value

fn eq(&self, other: &Value) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Value