Trait FieldConstraintsExt 

pub trait FieldConstraintsExt {
    // Required methods
    fn field_constraints(&self) -> ConstraintDecodeResult<FieldRules>;
    fn real_oneof(&self) -> Option<OneofDescriptor>;
    fn is_optional(&self) -> bool;
}

Extension trait for extracting buf.validate.field rules from a field descriptor.

Required Methods

fn field_constraints(&self) -> ConstraintDecodeResult<FieldRules>

Returns the FieldRules for this field, if any.

Errors

Returns an error if the extension value cannot be transcoded to FieldRules.

fn real_oneof(&self) -> Option<OneofDescriptor>

Returns the real (non-synthetic) oneof containing this field, if any.

fn is_optional(&self) -> bool

Returns true if this field is proto3 optional (synthetic oneof).

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl FieldConstraintsExt for FieldDescriptor

fn field_constraints(&self) -> ConstraintDecodeResult<FieldRules>

fn real_oneof(&self) -> Option<OneofDescriptor>

fn is_optional(&self) -> bool

Implementors