Function eval_ast_expr

Tools/clinic/libclinic/dsl_parser.py:148–169

Takes an ast.Expr node. Compiles it into a function object, then calls the function object with 0 arguments. Returns the result of that function call. globals represents the globals dict the expression should see. (There's no equivalent for "locals" here.)

(
    node: ast.expr,
    *,
    filename: str = '-'
)

def eval_ast_expr(
    node: ast.expr,
    *,
    filename: str = '-'
) -> Any:
    """
    Takes an ast.Expr node.  Compiles it into a function object,
    then calls the function object with 0 arguments.
    Returns the result of that function call.

    globals represents the globals dict the expression
    should see.  (There's no equivalent for "locals" here.)
    """

    if isinstance(node, ast.Expr):
        node = node.value

    expr = ast.Expression(node)
    namespace = create_parser_namespace()
    co = compile(expr, filename, 'eval')
    fn = FunctionType(co, namespace)
    return fn()


class IndentStack: