================================================================================
Integer
================================================================================

foo = 0
foo = 42

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

(source_file
  (assignment
    (identifier)
    (integer_literal))
  (assignment
    (identifier)
    (integer_literal)))

================================================================================
Integer (negative)
================================================================================

foo = -0
foo = -42

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

(source_file
  (assignment
    (identifier)
    (integer_literal))
  (assignment
    (identifier)
    (integer_literal)))

================================================================================
String
================================================================================

foo = "Hello World!"

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

(source_file
  (assignment
    (identifier)
    (interpreted_string_literal)))

================================================================================
String (escape)
================================================================================

foo = "Hello\nWorld!"

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

(source_file
  (assignment
    (identifier)
    (interpreted_string_literal
      (escape_sequence))))

================================================================================
String (raw)
================================================================================

foo = `Hello\nWorld!`

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

(source_file
  (assignment
    (identifier)
    (raw_string_literal)))

================================================================================
List (empty)
================================================================================

foo = []

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

(source_file
  (assignment
    (identifier)
    (list_expression)))

================================================================================
List (singleton)
================================================================================

foo = [42]

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

(source_file
  (assignment
    (identifier)
    (list_expression
      (integer_literal))))

================================================================================
List (singleton multiline)
================================================================================

foo = [
    42
]

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

(source_file
  (assignment
    (identifier)
    (list_expression
      (integer_literal))))

================================================================================
List (singleton trailing comma)
================================================================================

foo = [
    42,
]

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

(source_file
  (assignment
    (identifier)
    (list_expression
      (integer_literal))))

================================================================================
List (mixed values)
================================================================================

foo = [
    42,
    "foobar",
]

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

(source_file
  (assignment
    (identifier)
    (list_expression
      (integer_literal)
      (interpreted_string_literal))))

================================================================================
List (list of list)
================================================================================

foo = [
    [42],
    ["foobar"],
    [],
]

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

(source_file
  (assignment
    (identifier)
    (list_expression
      (list_expression
        (integer_literal))
      (list_expression
        (interpreted_string_literal))
      (list_expression))))

================================================================================
List (rogue comma)
================================================================================

foo = [
    ,
]

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

(source_file
  (assignment
    (identifier)
    (list_expression
      (ERROR))))