Qyriad
a4ef195a9f
This is terrible UX, and frankly an eval failure should be a cache
invalidation anyway.
This removes the CachedEvalError type entirely.
Fixes #223.
Change-Id: I91f8003eabd0ea45003024e96d1de3c7ae8e49d8
105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
#include "eval-error.hh"
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#include "eval.hh"
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#include "value.hh"
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namespace nix {
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template<class T>
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EvalErrorBuilder<T> & EvalErrorBuilder<T>::withExitStatus(unsigned int exitStatus)
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{
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error.withExitStatus(exitStatus);
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return *this;
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}
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template<class T>
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EvalErrorBuilder<T> & EvalErrorBuilder<T>::atPos(PosIdx pos)
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{
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error.err.pos = error.state.positions[pos];
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return *this;
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}
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template<class T>
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EvalErrorBuilder<T> & EvalErrorBuilder<T>::atPos(Value & value, PosIdx fallback)
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{
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return atPos(value.determinePos(fallback));
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}
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template<class T>
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EvalErrorBuilder<T> & EvalErrorBuilder<T>::withTrace(PosIdx pos, const std::string_view text)
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{
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error.err.traces.push_front(
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Trace{.pos = error.state.positions[pos], .hint = HintFmt(std::string(text))});
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return *this;
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}
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template<class T>
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EvalErrorBuilder<T> & EvalErrorBuilder<T>::withSuggestions(Suggestions & s)
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{
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error.err.suggestions = s;
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return *this;
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}
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template<class T>
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EvalErrorBuilder<T> & EvalErrorBuilder<T>::withFrame(const Env & env, const Expr & expr)
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{
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// NOTE: This is abusing side-effects.
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// TODO: check compatibility with nested debugger calls.
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// TODO: What side-effects??
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error.state.debugTraces.push_front(DebugTrace{
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.pos = error.state.positions[expr.getPos()],
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.expr = expr,
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.env = env,
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.hint = HintFmt("Fake frame for debugging purposes"),
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.isError = true});
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return *this;
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}
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template<class T>
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EvalErrorBuilder<T> & EvalErrorBuilder<T>::addTrace(PosIdx pos, HintFmt hint)
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{
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error.addTrace(error.state.positions[pos], hint);
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return *this;
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}
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template<class T>
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template<typename... Args>
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EvalErrorBuilder<T> &
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EvalErrorBuilder<T>::addTrace(PosIdx pos, std::string_view formatString, const Args &... formatArgs)
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{
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addTrace(error.state.positions[pos], HintFmt(std::string(formatString), formatArgs...));
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return *this;
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}
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template<class T>
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void EvalErrorBuilder<T>::debugThrow()
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{
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if (error.state.debugRepl && !error.state.debugTraces.empty()) {
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const DebugTrace & last = error.state.debugTraces.front();
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const Env * env = &last.env;
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const Expr * expr = &last.expr;
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error.state.runDebugRepl(&error, *env, *expr);
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}
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// `EvalState` is the only class that can construct an `EvalErrorBuilder`,
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// and it does so in dynamic storage. This is the final method called on
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// any such instance and must delete itself before throwing the underlying
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// error.
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auto error = std::move(this->error);
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delete this;
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throw error;
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}
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template class EvalErrorBuilder<EvalError>;
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template class EvalErrorBuilder<AssertionError>;
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template class EvalErrorBuilder<ThrownError>;
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template class EvalErrorBuilder<Abort>;
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template class EvalErrorBuilder<TypeError>;
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template class EvalErrorBuilder<UndefinedVarError>;
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template class EvalErrorBuilder<MissingArgumentError>;
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template class EvalErrorBuilder<InfiniteRecursionError>;
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template class EvalErrorBuilder<InvalidPathError>;
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}
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