5.4.4 <al-setarg>

##
5.4.4 `<al-setarg>`

The `<al-setarg>` tag is used pass content to a macro. All content enclosed by the tag will be passed as an argument to the macro named by the parent `<al-expand>` (5.4.3) tag.

The `<al-setarg>` tag is normally used to pass content to macros that define named arguments, but can also be used to enclose the unnamed argument.

    >>> import albatross
    >>> ctx = albatross.SimpleContext('.')
    >>> albatross.Template(ctx, '<magic>', '''
    ... <al-macro name="title">
    ...  <title><al-usearg></title>
    ... </al-macro>
    ... ''').to_html(ctx)
    >>> albatross.Template(ctx, '<magic>', '''
    ... <al-expand name="title">
    ...  <al-setarg>Lumberjack</al-setarg>
    ... </al-expand>''').to_html(ctx)
    >>> ctx.flush_content()
    <title>Lumberjack</title>
    >>> albatross.Template(ctx, '<magic>', '''
    ... <al-expand name="title">
    ...  Lumberjack
    ... </al-expand>''').to_html(ctx)
    >>> ctx.flush_content()
    <title>Lumberjack
    </title>