Method fmt

crates/ruff_python_formatter/src/string/implicit.rs:43–65

(&self, f: &mut PyFormatter)

impl Format<PyFormatContext<'_>> for FormatImplicitConcatenatedString<'_> {
    fn fmt(&self, f: &mut PyFormatter) -> FormatResult<()> {
        let flat = FormatImplicitConcatenatedStringFlat::new(self.string, f.context());
        let expanded = FormatImplicitConcatenatedStringExpanded::new(
            self.string,
            if flat.is_some() {
                ImplicitConcatenatedLayout::MaybeFlat
            } else {
                ImplicitConcatenatedLayout::Multipart
            },
        );

        // If the string can be joined, try joining the implicit concatenated string into a single string
        // if it fits on the line. Otherwise, parenthesize the string parts and format each part on its
        // own line.
        if let Some(flat) = flat {
            write!(
                f,
                [if_group_fits_on_line(&flat), if_group_breaks(&expanded)]
            )
        } else {
            expanded.fmt(f)
        }
    }
}

/// Formats an implicit concatenated string where parts are separated by a space or line break.