Eagerly evaluate const fns #15211
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Eagerly evaluate const fns #15211
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As discussed in #15122 (comment), try converting eagerly evaluated const fn's into lazy ones.
This seems to have some undesired effects, so I'm not sure if this should be merged. Namely clippy would now suggest lazily evaluating cheap functions like String::new() or Duration::from_seconds({argument known at compile-time}).