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by dnsco
1477 days ago
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The turbofish resolves a bunch of syntax ambiguities[1]. Apparently C++ parsing is undecidable, so building an AST requires arbitrary template instantiation (and C++ templates are turing complete). The turbofish is a compromise that allows the parser to stay simple. I know there were efforts to remove it, but it appears to be here to stay. https://github.com/rust-lang/rust/blob/master/src/test/ui/pa... |
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