Struct std::typing::Field

Field descriptor.

This struct provides compile-time reflection information about a field of a struct or union.

It is created by calling fields.

Methods

• fn name(self: &Field<StructT, FieldT>) -> Option<&[u8]>

  source

  Returns the name of the field.

• fn offset(self: &Field<StructT, FieldT>) -> usize

  source

  Returns the byte offset of the field in the struct.

• fn type(self: &Field<StructT, FieldT>) -> Type<FieldT>

  source

  Returns the type descriptor of the field.

• fn as_ptr(self: &Field<StructT, FieldT>, inst: &StructT) -> &FieldT

  source

  Returns the pointer to the field in the struct for the given instance.

  Example

  use std::typing::Type;
  
  struct Foo {
      bar: i32,
  }
  
  let field: Type<Foo> = Type::new();
  let field_desc = field.fields().0;
  
  let foo = Foo { bar: 42 };
  assert_eq!(*field_desc.as_ptr(&foo), 42);
  Run this example

• fn as_mut_ptr(self: &Field<StructT, FieldT>, inst: &mut StructT) -> &mut FieldT

  source

  Returns the mutable pointer to the field in the struct for the given instance.

  Example

  use std::typing::Type;
  
  struct Foo {
      bar: i32,
  }
  
  let field: Type<Foo> = Type::new();
  let field_desc = field.fields().0;
  
  let foo = Foo { bar: 42 };
  *field_desc.as_mut_ptr(&foo) = 1337;
  assert_eq!(foo.bar, 1337);
  Run this example