Function compile_rules

deps/v8/third_party/jinja2/lexer.py:211–249

Compiles all the rules from the environment into a list of rules.

(environment: "Environment")

def compile_rules(environment: "Environment") -> t.List[t.Tuple[str, str]]:
    """Compiles all the rules from the environment into a list of rules."""
    e = re.escape
    rules = [
        (
            len(environment.comment_start_string),
            TOKEN_COMMENT_BEGIN,
            e(environment.comment_start_string),
        ),
        (
            len(environment.block_start_string),
            TOKEN_BLOCK_BEGIN,
            e(environment.block_start_string),
        ),
        (
            len(environment.variable_start_string),
            TOKEN_VARIABLE_BEGIN,
            e(environment.variable_start_string),
        ),
    ]

    if environment.line_statement_prefix is not None:
        rules.append(
            (
                len(environment.line_statement_prefix),
                TOKEN_LINESTATEMENT_BEGIN,
                r"^[ \t\v]*" + e(environment.line_statement_prefix),
            )
        )
    if environment.line_comment_prefix is not None:
        rules.append(
            (
                len(environment.line_comment_prefix),
                TOKEN_LINECOMMENT_BEGIN,
                r"(?:^|(?<=\S))[^\S\r\n]*" + e(environment.line_comment_prefix),
            )
        )

    return [x[1:] for x in sorted(rules, reverse=True)]


class Failure: