[Proposal] Literal expressions#3258
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rjmccall
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- Add Int128 and UInt128 supported types. - Add wrapping arithmetic operators (&+, &-, &*) and masking shift operators (&<<, &>>) to the supported binary operator set. - Add unary + to the supported prefix operators. - Add a paragraph on operator resolution, specifying that ordinary Swift name lookup is used and the fold is rejected when the chosen operator is not a standard library operator on a standard library integer type. - Variable references: extend eligibility list to cover @objc and @c let bindings. - Variable references: forbid references to public, package, and open let bindings to preserve the proposal's no-ABI-impact position; mention that lifting this restriction is deferred to a future opt-in mechanism. - Source compatibility: expand into two named subsections covering generic-argument-list disambiguation (Foo<(a < b, c > .d)>(x)) and value-bindings shadowing type names (let Int = 0; Array<(Int)>). - Alternatives considered: expand the naming rationale.
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