[ef4]

Deprecates {{&foo}}, {{^}} as {{else}}, {{^foo}}...{{else}}...{{/foo}} and raw blocks, until 8.0.0. How We Teach This contains the four deprecation guides verbatim.

Propose Deprecate legacy handlebars template syntax

Rendered

Summary

This pull request is proposing a new RFC.

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Checklist to move to Exploring

• The team believes the concepts described in the RFC should be pursued.
• The label S-Proposed is removed from the PR and the label S-Exploring is added.
• The Ember team is willing to work on the proposal to get it to Accepted

Checklist to move to Accepted

• This PR has had the Final Comment Period label has been added to start the FCP
• The RFC is announced in #news-and-announcements in the Ember Discord.
• The RFC has complete prose, is well-specified and ready for implementation.
  • All sections of the RFC are filled out.
  • Any unanswered questions are outlined and expected to be answered before Ready for Release.
  • "How we teach this?" is sufficiently filled out.
• The RFC has a champion within one of the relevant teams.
• The RFC has consensus after the FCP period.

[ef4]

Deprecation guides written: ember-learn/deprecation-app#1442

[NullVoxPopuli]

is this intended for just the special handlebars syntaxes?

or also goofy non-JS identifiers as well? (aka "Deprecate everything we don't like"), e.g.: <Foo @kebeb-arg={{...}}>

[ef4]

We could expand it to cover more cases if we want. I think it makes sense to group a bunch of deprecated syntax features together.