cryspen/hax

`while let .. = .. {}`

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#113 ouverte le 2 juin 2023

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enginegood first issuehelp wantedkeep-openunsupported-rust

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 (Merge moyen 4j 22h) (42 PRs mergées en 30 j)

Description

Early in the pipeline, the Rust compiler expands every kind of loops (while, while let, for) as plain loops. Thus, what we see in the engine are only loops.

Loops in the AST of hax are designed to be flexible: either we deal with plain loops, or with specific loop kinds. ASTs can allow or disable (by type) any loop kind.

For for loops, we have two different possible special handlings. Loops that look like for loops can be reshaped into proper iterator-based fors or into range-based fors.

  • reconstruct while let loops.

(see https://github.com/hacspec/hax/issues/522 for simple whiles)

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