================================================================================
Call expressions
================================================================================

package main

func main() {
  a(b, c...)

  a(
    b,
    c,
  )

  a(
    b,
    c...,
  )
}

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

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

================================================================================
Nested call expressions
================================================================================

package main

func main() {
  a(b(c(d)))
}

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

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

================================================================================
Generic call expressions
================================================================================

package main

func main() {
  a[b](c)
  a[b, c](d)
  a[b[c], d](e[f])
}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (expression_statement
        (call_expression
          (identifier)
          (type_arguments
            (type_identifier))
          (argument_list
            (identifier))))
      (expression_statement
        (call_expression
          (identifier)
          (type_arguments
            (type_identifier)
            (type_identifier))
          (argument_list
            (identifier))))
      (expression_statement
        (call_expression
          (identifier)
          (type_arguments
            (generic_type
              (type_identifier)
              (type_arguments
                (type_identifier)))
            (type_identifier))
          (argument_list
            (index_expression
              (identifier)
              (identifier))))))))

================================================================================
Calls to 'make' and 'new'
================================================================================

package main

func main() {
  make(chan<- int)

  // `new` and `make` can also be used as variable names
  make(chan<- int, (new - old), make.stuff)

  make(chan<- int, 5, 10)
  new(map[string]string)
}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (expression_statement
        (call_expression
          (identifier)
          (argument_list
            (channel_type
              (type_identifier)))))
      (comment)
      (expression_statement
        (call_expression
          (identifier)
          (argument_list
            (channel_type
              (type_identifier))
            (parenthesized_expression
              (binary_expression
                (identifier)
                (identifier)))
            (selector_expression
              (identifier)
              (field_identifier)))))
      (expression_statement
        (call_expression
          (identifier)
          (argument_list
            (channel_type
              (type_identifier))
            (int_literal)
            (int_literal))))
      (expression_statement
        (call_expression
          (identifier)
          (argument_list
            (map_type
              (type_identifier)
              (type_identifier))))))))

================================================================================
Selector expressions
================================================================================

package main

func main() {
  a.b.c()
}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (expression_statement
        (call_expression
          (selector_expression
            (selector_expression
              (identifier)
              (field_identifier))
            (field_identifier))
          (argument_list))))))

================================================================================
Indexing expressions
================================================================================

package main

func main() {
  _ = a[1]
  _ = b[:]
  _ = c[1:]
  _ = d[1:2]
  _ = e[:2:3]
  _ = f[1:2:3]
}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (index_expression
            (identifier)
            (int_literal))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (slice_expression
            (identifier))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (slice_expression
            (identifier)
            (int_literal))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (slice_expression
            (identifier)
            (int_literal)
            (int_literal))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (slice_expression
            (identifier)
            (int_literal)
            (int_literal))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (slice_expression
            (identifier)
            (int_literal)
            (int_literal)
            (int_literal)))))))

================================================================================
Type assertion expressions
================================================================================

package main

func main() {
  _ = a.(p.Person)
}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (type_assertion_expression
            (identifier)
            (qualified_type
              (package_identifier)
              (type_identifier))))))))

================================================================================
Type conversion expressions
================================================================================

package main

func main() {
  _ = []a.b(c.d)
  _ = ([]a.b)(c.d)
  _ = <-chan int(c) // conversion to channel type
  <-(chan int(c)) // receive statement
  // These type conversions cannot be distinguished from call expressions
  T(x)
  (*Point)(p)
  e.f(g)
  (e.f)(g)
}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (type_conversion_expression
            (slice_type
              (qualified_type
                (package_identifier)
                (type_identifier)))
            (selector_expression
              (identifier)
              (field_identifier)))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (type_conversion_expression
            (parenthesized_type
              (slice_type
                (qualified_type
                  (package_identifier)
                  (type_identifier))))
            (selector_expression
              (identifier)
              (field_identifier)))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (type_conversion_expression
            (channel_type
              (type_identifier))
            (identifier))))
      (comment)
      (expression_statement
        (unary_expression
          (parenthesized_expression
            (type_conversion_expression
              (channel_type
                (type_identifier))
              (identifier)))))
      (comment)
      (comment)
      (expression_statement
        (call_expression
          (identifier)
          (argument_list
            (identifier))))
      (expression_statement
        (call_expression
          (parenthesized_expression
            (unary_expression
              (identifier)))
          (argument_list
            (identifier))))
      (expression_statement
        (call_expression
          (selector_expression
            (identifier)
            (field_identifier))
          (argument_list
            (identifier))))
      (expression_statement
        (call_expression
          (parenthesized_expression
            (selector_expression
              (identifier)
              (field_identifier)))
          (argument_list
            (identifier)))))))

================================================================================
Unary expressions
================================================================================

package main

func main() {
  _ = !<-a
  _ = *foo()
}

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

(source_file
  (package_clause
    (package_identifier))
  (function_declaration
    (identifier)
    (parameter_list)
    (block
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (unary_expression
            (unary_expression
              (identifier)))))
      (assignment_statement
        (expression_list
          (identifier))
        (expression_list
          (unary_expression
            (call_expression
              (identifier)
              (argument_list))))))))
