operation expressions

At a glance

• Identifier: #823
• Stage: RFC0: Strawman
• Champion: @benjie
• PR: operation expressions

Timeline

• 2 commits pushed on 2021-03-16:
  • Merge branch 'main' into operation-expressions by @benjie
  • Use > rather than . for name paths by @benjie
• Added to 2021-03-04 WG agenda
• Mentioned in 2021-03-04 WG notes
• 5 commits pushed on 2021-02-19:
  • Add more examples and grammar summary by @benjie
  • Fix headers, add number syntax by @benjie
  • Format (some of) RFC with prettier by @benjie
  • Allow aliasing fragments within a SelectionPath by @benjie
  • Clarify grammar introduction by @benjie
• Spec PR created on 2021-02-17 by benjie
• Commit pushed: RFC: operation expressions on 2021-02-17 by @benjie

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Relates to https://github.com/graphql/graphql-wg/issues/592

This RFC is to act as a discussion place for operation expressions; an extension to the Schema Coordinates syntax that allows for a host of new use cases.

I've outlined some of the use cases that have been discussed so far, and have iterated on the syntax a little, but everything in this is very much in flux. The purpose of this PR is to be a place to host the discussion (separate from Schema Coordinates) so that others may bring their ideas to the table. I don't think it's suitable for merging at this time.

See the document rendered nicely here.

Grammar support:

• Anonymous operations
• Named operations
• Named fragments
• Inline fragments
• Named fragments within a path
• Arguments
• Argument nested input object references
• Lists
• Directives