=====================================
single line
=====================================

"Hello, 123!"

---

(source
  (string
    (string_content)))

=====================================
multiple lines
=====================================

"line 1
line 2"

---

(source
  (string
    (string_content)))

=====================================
interpolation
=====================================

"hey #{name}!"
"hey #{
  name
}!"
"##{name}#"

---

(source
  (string
    (string_content)
    (interpolation
      (identifier))
    (string_content))
  (string
    (string_content)
    (interpolation
      (identifier))
    (string_content))
  (string
    (string_content)
    (interpolation
      (identifier))
    (string_content)))

=====================================
nested interpolation
=====================================

"this is #{"number #{1}"}!"

---

(source
  (string
    (string_content)
    (interpolation
      (string
        (string_content)
        (interpolation
          (integer))))
    (string_content)))

=====================================
escape sequence
=====================================

"_\"_\n_\t_\r_\e_\\_\1_\x3f_\u0065\u0301_"

---

(source
  (string
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (string_content)
    (escape_sequence)
    (escape_sequence)
    (string_content)))

=====================================
escaped interpolation
=====================================

"\#{1}"

---

(source
  (string
    (escape_sequence)
    (string_content)))

=====================================
heredoc / string
=====================================

"""
text
with "quotes"
"""

---

(source
  (string
    (string_content)))

=====================================
heredoc / interpolation
=====================================

"""
hey #{name}!
"""

---

(source
  (string
    (string_content)
    (interpolation
      (identifier))
    (string_content)))

=====================================
heredoc / nested interpolation
=====================================

"""
this is #{
  """
  number #{1}
  """
}!
"""

---

(source
  (string
    (string_content)
    (interpolation
      (string
        (string_content)
        (interpolation
          (integer))
        (string_content)))
    (string_content)))

=====================================
heredoc / escaped delimiter
=====================================

"""
\"""
"""

"""
\"\"\"
"""

---

(source
  (string
    (string_content)
    (escape_sequence)
    (string_content))
  (string
    (string_content)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (string_content)))

=====================================
heredoc / escaped interpolation
=====================================

"""
\#{1}
"""

---

(source
  (string
    (string_content)
    (escape_sequence)
    (string_content)))

=====================================
[error] heredoc / no whitespace
=====================================

"""s"""

---

(source
  (ERROR
    (identifier)))