================================================================================
Struct with a type parameter struct constraint
================================================================================

public struct F<T> where T:struct {}

--------------------------------------------------------------------------------

(compilation_unit
  (struct_declaration
    (modifier)
    name: (identifier)
    type_parameters: (type_parameter_list
      (type_parameter
        name: (identifier)))
    (type_parameter_constraints_clause
      target: (identifier)
      constraints: (type_parameter_constraint))
    body: (declaration_list)))

================================================================================
Struct with a type parameter class constraint
================================================================================

public struct F<T> where T:class {}

--------------------------------------------------------------------------------

(compilation_unit
  (struct_declaration
    (modifier)
    name: (identifier)
    type_parameters: (type_parameter_list
      (type_parameter
        name: (identifier)))
    (type_parameter_constraints_clause
      target: (identifier)
      constraints: (type_parameter_constraint))
    body: (declaration_list)))

================================================================================
Struct with type parameter new constraint
================================================================================

public struct F<T> where T: new() {}

--------------------------------------------------------------------------------

(compilation_unit
  (struct_declaration
    (modifier)
    name: (identifier)
    type_parameters: (type_parameter_list
      (type_parameter
        name: (identifier)))
    (type_parameter_constraints_clause
      target: (identifier)
      constraints: (type_parameter_constraint
        (constructor_constraint)))
    body: (declaration_list)))

================================================================================
Struct with interface
================================================================================

public struct A : ISomething { }

--------------------------------------------------------------------------------

(compilation_unit
  (struct_declaration
    (modifier)
    name: (identifier)
    bases: (base_list
      (identifier))
    body: (declaration_list)))

================================================================================
Struct with multiple type parameter constraints
================================================================================

private struct F<T1,T2> where T1 : I1, I2, new() where T2 : I2 { }

--------------------------------------------------------------------------------

(compilation_unit
  (struct_declaration
    (modifier)
    name: (identifier)
    type_parameters: (type_parameter_list
      (type_parameter
        name: (identifier))
      (type_parameter
        name: (identifier)))
    (type_parameter_constraints_clause
      target: (identifier)
      constraints: (type_parameter_constraint
        (type_constraint
          type: (identifier)))
      constraints: (type_parameter_constraint
        (type_constraint
          type: (identifier)))
      constraints: (type_parameter_constraint
        (constructor_constraint)))
    (type_parameter_constraints_clause
      target: (identifier)
      constraints: (type_parameter_constraint
        (type_constraint
          type: (identifier))))
    body: (declaration_list)))

================================================================================
Struct with readonly modifier
================================================================================

readonly struct Test {
}

--------------------------------------------------------------------------------

(compilation_unit
  (struct_declaration
    (modifier)
    name: (identifier)
    body: (declaration_list)))

================================================================================
Struct with ref modifier
================================================================================

ref struct Test {
}

--------------------------------------------------------------------------------

(compilation_unit
  (struct_declaration
    (modifier)
    name: (identifier)
    body: (declaration_list)))