================================================================================
Single const declarations without types
================================================================================

package main

const zero = 0
const one, two = 1, 2
const three, four, five = 3, 4, 5

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

(source_file
  (package_clause
    (package_identifier))
  (const_declaration
    (const_spec
      (identifier)
      (expression_list
        (int_literal))))
  (const_declaration
    (const_spec
      (identifier)
      (identifier)
      (expression_list
        (int_literal)
        (int_literal))))
  (const_declaration
    (const_spec
      (identifier)
      (identifier)
      (identifier)
      (expression_list
        (int_literal)
        (int_literal)
        (int_literal)))))

================================================================================
Single const declarations with types
================================================================================

package main

const zero int = 0
const one, two uint64 = 1, 2

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

(source_file
  (package_clause
    (package_identifier))
  (const_declaration
    (const_spec
      (identifier)
      (type_identifier)
      (expression_list
        (int_literal))))
  (const_declaration
    (const_spec
      (identifier)
      (identifier)
      (type_identifier)
      (expression_list
        (int_literal)
        (int_literal)))))

================================================================================
Grouped const declarations
================================================================================

package main

const (
  zero = 0
  one = 1
)

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

(source_file
  (package_clause
    (package_identifier))
  (const_declaration
    (const_spec
      (identifier)
      (expression_list
        (int_literal)))
    (const_spec
      (identifier)
      (expression_list
        (int_literal)))))

================================================================================
Const declarations with implicit values
================================================================================

package main

const (
  zero = iota
  one
  two
)

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

(source_file
  (package_clause
    (package_identifier))
  (const_declaration
    (const_spec
      (identifier)
      (expression_list
        (iota)))
    (const_spec
      (identifier))
    (const_spec
      (identifier))))

================================================================================
Var declarations without types
================================================================================

package main

var zero = 0
var one, two = 1, 2
var three, four, five = 3, 4, 5

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

(source_file
  (package_clause
    (package_identifier))
  (var_declaration
    (var_spec
      (identifier)
      (expression_list
        (int_literal))))
  (var_declaration
    (var_spec
      (identifier)
      (identifier)
      (expression_list
        (int_literal)
        (int_literal))))
  (var_declaration
    (var_spec
      (identifier)
      (identifier)
      (identifier)
      (expression_list
        (int_literal)
        (int_literal)
        (int_literal)))))

================================================================================
Var declarations with types
================================================================================

package main

var zero int = 0
var one, two uint64 = 1, 2

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

(source_file
  (package_clause
    (package_identifier))
  (var_declaration
    (var_spec
      (identifier)
      (type_identifier)
      (expression_list
        (int_literal))))
  (var_declaration
    (var_spec
      (identifier)
      (identifier)
      (type_identifier)
      (expression_list
        (int_literal)
        (int_literal)))))

================================================================================
Var declarations with no expressions
================================================================================

package main

var zero int
var one, two uint64

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

(source_file
  (package_clause
    (package_identifier))
  (var_declaration
    (var_spec
      (identifier)
      (type_identifier)))
  (var_declaration
    (var_spec
      (identifier)
      (identifier)
      (type_identifier))))

================================================================================
Grouped var declarations
================================================================================

package main

var (
  zero = 0
  one = 1
)

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

(source_file
  (package_clause
    (package_identifier))
  (var_declaration
    (var_spec
      (identifier)
      (expression_list
        (int_literal)))
    (var_spec
      (identifier)
      (expression_list
        (int_literal)))))

================================================================================
Function declarations
================================================================================

package main

func f1() {}
func f2(a File, b, c, d Thing) int {}
func f2() (File, Thing) {}
func f2() (result int, err error) {}
func f(x ... int, y ... int)
func g1[T, U any, V interface{}, W Foo[Bar[T]]](a Foo[T]) {}
func g1[T, U any, V interface{}, W Foo[Bar[T]]](a Foo[T]) {}
func g2(a foo.bar[int]) {}
func f[A int|string, B ~int, C ~int|~string]()

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block))
  (function_declaration
    (identifier)
    (parameter_list
      (parameter_declaration
        (identifier)
        (type_identifier))
      (parameter_declaration
        (identifier)
        (identifier)
        (identifier)
        (type_identifier)))
    (type_identifier)
    (block))
  (function_declaration
    (identifier)
    (parameter_list)
    (parameter_list
      (parameter_declaration
        (type_identifier))
      (parameter_declaration
        (type_identifier)))
    (block))
  (function_declaration
    (identifier)
    (parameter_list)
    (parameter_list
      (parameter_declaration
        (identifier)
        (type_identifier))
      (parameter_declaration
        (identifier)
        (type_identifier)))
    (block))
  (function_declaration
    (identifier)
    (parameter_list
      (variadic_parameter_declaration
        (identifier)
        (type_identifier))
      (variadic_parameter_declaration
        (identifier)
        (type_identifier))))
  (function_declaration
    (identifier)
    (type_parameter_list
      (parameter_declaration
        (identifier)
        (identifier)
        (type_identifier))
      (parameter_declaration
        (identifier)
        (interface_type))
      (parameter_declaration
        (identifier)
        (generic_type
          (type_identifier)
          (type_arguments
            (generic_type
              (type_identifier)
              (type_arguments
                (type_identifier)))))))
    (parameter_list
      (parameter_declaration
        (identifier)
        (generic_type
          (type_identifier)
          (type_arguments
            (type_identifier)))))
    (block))
  (function_declaration
    (identifier)
    (type_parameter_list
      (parameter_declaration
        (identifier)
        (identifier)
        (type_identifier))
      (parameter_declaration
        (identifier)
        (interface_type))
      (parameter_declaration
        (identifier)
        (generic_type
          (type_identifier)
          (type_arguments
            (generic_type
              (type_identifier)
              (type_arguments
                (type_identifier)))))))
    (parameter_list
      (parameter_declaration
        (identifier)
        (generic_type
          (type_identifier)
          (type_arguments
            (type_identifier)))))
    (block))
  (function_declaration
    (identifier)
    (parameter_list
      (parameter_declaration
        (identifier)
        (generic_type
          (qualified_type
            (package_identifier)
            (type_identifier))
          (type_arguments
            (type_identifier)))))
    (block))
  (function_declaration
    (identifier)
    (type_parameter_list
      (parameter_declaration
        (identifier)
        (ERROR
          (identifier))
        (type_identifier))
      (parameter_declaration
        (identifier)
        (ERROR)
        (type_identifier))
      (parameter_declaration
        (identifier)
        (ERROR
          (identifier))
        (type_identifier)))
    (parameter_list)))

================================================================================
Single-line function declarations
================================================================================

package main

func f1() { a() }
func f2() { a(); b() }
func f3() { a(); b(); }

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (call_expression
        (identifier)
        (argument_list))))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (call_expression
        (identifier)
        (argument_list))
      (call_expression
        (identifier)
        (argument_list))))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (call_expression
        (identifier)
        (argument_list))
      (call_expression
        (identifier)
        (argument_list)))))

================================================================================
Variadic function declarations
================================================================================

package main

func f1(a ...*int) {}
func f2(a int, b ...int) {}
func f3(...bool) {}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list
      (variadic_parameter_declaration
        (identifier)
        (pointer_type
          (type_identifier))))
    (block))
  (function_declaration
    (identifier)
    (parameter_list
      (parameter_declaration
        (identifier)
        (type_identifier))
      (variadic_parameter_declaration
        (identifier)
        (type_identifier)))
    (block))
  (function_declaration
    (identifier)
    (parameter_list
      (variadic_parameter_declaration
        (type_identifier)))
    (block)))

================================================================================
Method declarations
================================================================================

package main

func (self Person) Equals(other Person) bool {}
func (v *Value) ObjxMap(optionalDefault ...(Map)) Map {}
func (p *T1) M1()

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

(source_file
  (package_clause
    (package_identifier))
  (method_declaration
    (parameter_list
      (parameter_declaration
        (identifier)
        (type_identifier)))
    (field_identifier)
    (parameter_list
      (parameter_declaration
        (identifier)
        (type_identifier)))
    (type_identifier)
    (block))
  (method_declaration
    (parameter_list
      (parameter_declaration
        (identifier)
        (pointer_type
          (type_identifier))))
    (field_identifier)
    (parameter_list
      (variadic_parameter_declaration
        (identifier)
        (parenthesized_type
          (type_identifier))))
    (type_identifier)
    (block))
  (method_declaration
    (parameter_list
      (parameter_declaration
        (identifier)
        (pointer_type
          (type_identifier))))
    (field_identifier)
    (parameter_list)))

================================================================================
Type declarations
================================================================================

package main

type a b
type (
  a b
  c d
)

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

(source_file
  (package_clause
    (package_identifier))
  (type_declaration
    (type_spec
      (type_identifier)
      (type_identifier)))
  (type_declaration
    (type_spec
      (type_identifier)
      (type_identifier))
    (type_spec
      (type_identifier)
      (type_identifier))))
