eldritch horrors 08252967a8 libexpr: Support structured error classes ... While preparing PRs like #9753, I've had to change error messages in dozens of code paths. It would be nice if instead of EvalError("expected 'boolean' but found '%1%'", showType(v)) we could write TypeError(v, "boolean") or similar. Then, changing the error message could be a mechanical refactor with the compiler pointing out places the constructor needs to be changed, rather than the error-prone process of grepping through the codebase. Structured errors would also help prevent the "same" error from having multiple slightly different messages, and could be a first step towards error codes / an error index. This PR reworks the exception infrastructure in `libexpr` to support exception types with different constructor signatures than `BaseError`. Actually refactoring the exceptions to use structured data will come in a future PR (this one is big enough already, as it has to touch every exception in `libexpr`). The core design is in `eval-error.hh`. Generally, errors like this: state.error("'%s' is not a string", getAttrPathStr()) .debugThrow<TypeError>() are transformed like this: state.error<TypeError>("'%s' is not a string", getAttrPathStr()) .debugThrow() The type annotation has moved from `ErrorBuilder::debugThrow` to `EvalState::error`. (cherry picked from commit c6a89c1a16) Change-Id: Iced91ba4e00ca9e801518071fb43798936cbd05a		2024-03-09 04:47:05 -07:00
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dotgraph.cc	Make ValidPathInfo have plain StorePathSet references like before	2023-01-14 16:42:03 -05:00
dotgraph.hh	Ensure all headers have #pragma once and are in API docs	2023-03-31 23:19:44 -04:00
graphml.cc	nix-store: Use long for narSize in graphml output	2023-03-24 17:25:17 +01:00
graphml.hh	Ensure all headers have #pragma once and are in API docs	2023-03-31 23:19:44 -04:00
nix-store.cc	libexpr: Support structured error classes	2024-03-09 04:47:05 -07:00