[SR-12260] It's impossible to change the default type for array and dictionary literals

[swift-ci]

Previous ID	SR-12260
Radar	rdar://problem/59740182
Original Reporter	cukier (JIRA User)
Type	Improvement

Additional Detail from JIRA

Votes	0
Component/s	Compiler, Standard Library
Labels	Improvement, StarterProposal
Assignee	None
Priority	Medium

md5: 37f9095891a29ee41ce249e50f84041f

Issue Description:

It's possible to change the default types for all literals except array and dictionary

https://developer.apple.com/documentation/swift/swift_standard_library/initialization_with_literals/default_literal_types

[typesanitizer]

@swift-ci create

I suspect the reason for this is that these came before the language had support for generic typealiases. For example, if one looks at the history of `public/core/Policy.swift`, one sees that the line

public typealias BooleanLiteralType = Bool

was added in 2014.

[CodaFi]

This would make for a good evolution proposal. Retagging.