1449509 - Conditional CONCAT

Status: RESOLVED WONTFIX

(Localization Infrastructure and Tools :: Fluent Migration, enhancement)

Description

[Staś Małolepszy :stas]

In bug 1445694 comment 12 Zibi is requesting a feature to conditionally prefix/postfix Transforms with whitespace.

One approach to provide this would be to introduce two new transforms, APPEND and PREPEND which only return something if the first argument is not None.

FTL.Message(
    id=FTL.Identifier('sync-signedin-unverified'),
    value=CONCAT(
        APPEND(
            COPY(
                'browser/chrome/browser/preferences/sync.dtd',
                'signedInUnverified.beforename.label',
            ),
            FTL.TextElement(' ')
        ),
        EXTERNAL_ARGUMENT('email'),
        PREPEND(
            COPY(
                'browser/chrome/browser/preferences/sync.dtd',
                'signedInUnverified.aftername.label',
            ),
            FTL.TextElement(' ')
        )
    )
)

Another approach would be to add before/after parameters to COPY:

FTL.Message(
    id=FTL.Identifier('sync-signedin-unverified'),
    value=CONCAT(
        COPY(
            'browser/chrome/browser/preferences/sync.dtd',
            'signedInUnverified.beforename.label',
            after=FTL.TextElement(' ')
        ),
        EXTERNAL_ARGUMENT('email'),
        COPY(
            'browser/chrome/browser/preferences/sync.dtd',
            'signedInUnverified.aftername.label',
            before=FTL.TextElement(' ')
        )
    ),
)

The first approach is more versatile, however, because it's more composable: you can use any FTL Node or Transform as the predicate.

Comment 1

[Eemeli Aro [:eemeli]]

Closing as WONTFIX due to lack of practical user interest.