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

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

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

(compilation_unit
  (struct_declaration
    (modifier)
    (identifier)
    (type_parameter_list
      (type_parameter
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    (type_parameter_constraints_clause
      (identifier)
      (type_parameter_constraint))
    (declaration_list)))

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

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

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

(compilation_unit
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    (declaration_list)))

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

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

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

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

public struct A : ISomething { }

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

(compilation_unit
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    (modifier)
    (identifier)
    (base_list
      (identifier))
    (declaration_list)))

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

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

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

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

readonly struct Test {
}

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

(compilation_unit
  (struct_declaration
    (modifier)
    (identifier)
    (declaration_list)))

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

ref struct Test {
}

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

(compilation_unit
  (struct_declaration
    (modifier)
    (identifier)
    (declaration_list)))
