Method _is_in_string_or_comment

IPython/core/completer.py:2653–2767

Determine if the cursor is inside a string or comment. Returns (is_string, is_in_expression) tuple: - is_string: True if in any kind of string - is_in_expression: True if inside an f-string/t-string expression

(self, text)

            return False

    def _is_in_string_or_comment(self, text):
        """
        Determine if the cursor is inside a string or comment.
        Returns (is_string, is_in_expression) tuple:
        - is_string: True if in any kind of string
        - is_in_expression: True if inside an f-string/t-string expression
        """
        in_single_quote = False
        in_double_quote = False
        in_triple_single = False
        in_triple_double = False
        in_template_string = False  # Covers both f-strings and t-strings
        in_expression = False  # For expressions in f/t-strings
        expression_depth = 0  # Track nested braces in expressions
        i = 0

        while i < len(text):
            # Check for f-string or t-string start
            if (
                i + 1 < len(text)
                and text[i] in ("f", "t")
                and (text[i + 1] == '"' or text[i + 1] == "'")
                and not (
                    in_single_quote
                    or in_double_quote
                    or in_triple_single
                    or in_triple_double
                )
            ):
                in_template_string = True
                i += 1  # Skip the 'f' or 't'

            # Handle triple quotes
            if i + 2 < len(text):
                if (
                    text[i : i + 3] == '"""'
                    and not in_single_quote
                    and not in_triple_single
                ):
                    in_triple_double = not in_triple_double
                    if not in_triple_double:
                        in_template_string = False
                    i += 3
                    continue
                if (
                    text[i : i + 3] == "'''"
                    and not in_double_quote
                    and not in_triple_double
                ):
                    in_triple_single = not in_triple_single
                    if not in_triple_single:
                        in_template_string = False
                    i += 3
                    continue

            # Handle escapes
            if text[i] == "\\" and i + 1 < len(text):
                i += 2