forked from lix-project/lix
Rebecca Turner
c6a89c1a16
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`. |
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.github | ||
config | ||
contrib | ||
dep-patches | ||
doc | ||
m4 | ||
maintainers | ||
misc | ||
mk | ||
perl | ||
scripts | ||
src | ||
tests | ||
.clang-format | ||
.dir-locals.el | ||
.editorconfig | ||
.gitignore | ||
.version | ||
configure.ac | ||
CONTRIBUTING.md | ||
COPYING | ||
default.nix | ||
docker.nix | ||
flake.lock | ||
flake.nix | ||
local.mk | ||
Makefile | ||
Makefile.config.in | ||
package.nix | ||
precompiled-headers.h | ||
README.md | ||
shell.nix |
Nix
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