Encode more precise scoping rules for function params #24021
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r? @huonw (rust_highfive has picked a reviewer for you, use r? to override) |
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(note I have not yet done a full |
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make tidy fails due to the and one of the tests got caught on a pretty printer bug, so I put in a workaround for that. But once I fix the |
Function params which outlive everything in the body (incl temporaries). Thus if we assign them their own `CodeExtent`, the region inference can properly show that it is sound to have temporaries with destructors that reference the parameters (because such temporaries will be dropped before the parameters are). This allows us to address issue 23338 in a clean way. As a drive-by, fix a mistake in the tyencode for `CodeExtent::BlockRemainder`.
We ignore pretty for the params-outlive-temps-of-body test because the way its comments are formatted exercises a known bug in the pretty printer.
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Okay everything checks out; I ran |
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r+ -- though I'm curious about the |
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Encode more precise scoping rules for function params Function params outlive everything in the body (incl temporaries). Thus if we assign them their own `CodeExtent`, the region inference can properly show that it is sound to have temporaries with destructors that reference the parameters (because such temporaries will be dropped before the parameters are dropped). Fix #23338
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Encode more precise scoping rules for function params
Function params outlive everything in the body (incl temporaries). Thus if we assign them their own
CodeExtent, the region inference can properly show that it is sound to have temporaries with destructors that reference the parameters (because such temporaries will be dropped before the parameters are dropped).Fix #23338