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Original file line number | Diff line number | Diff line change |
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#include "eval-error.hh" | ||
#include "eval.hh" | ||
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namespace nix { | ||
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template<class T> | ||
EvalErrorBuilder<T> & EvalErrorBuilder<T>::withExitStatus(unsigned int exitStatus) | ||
{ | ||
error.withExitStatus(exitStatus); | ||
return *this; | ||
} | ||
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template<class T> | ||
EvalErrorBuilder<T> & EvalErrorBuilder<T>::atPos(PosIdx pos) | ||
{ | ||
error.err.pos = error.state.positions[pos]; | ||
return *this; | ||
} | ||
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template<class T> | ||
EvalErrorBuilder<T> & EvalErrorBuilder<T>::withTrace(PosIdx pos, const std::string_view text) | ||
{ | ||
error.err.traces.push_front( | ||
Trace{.pos = error.state.positions[pos], .hint = hintformat(std::string(text)), .frame = false}); | ||
return *this; | ||
} | ||
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template<class T> | ||
EvalErrorBuilder<T> & EvalErrorBuilder<T>::withFrameTrace(PosIdx pos, const std::string_view text) | ||
{ | ||
error.err.traces.push_front( | ||
Trace{.pos = error.state.positions[pos], .hint = hintformat(std::string(text)), .frame = true}); | ||
return *this; | ||
} | ||
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template<class T> | ||
EvalErrorBuilder<T> & EvalErrorBuilder<T>::withSuggestions(Suggestions & s) | ||
{ | ||
error.err.suggestions = s; | ||
return *this; | ||
} | ||
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template<class T> | ||
EvalErrorBuilder<T> & EvalErrorBuilder<T>::withFrame(const Env & env, const Expr & expr) | ||
{ | ||
// NOTE: This is abusing side-effects. | ||
// TODO: check compatibility with nested debugger calls. | ||
// TODO: What side-effects?? | ||
error.state.debugTraces.push_front(DebugTrace{ | ||
.pos = error.state.positions[expr.getPos()], | ||
.expr = expr, | ||
.env = env, | ||
.hint = hintformat("Fake frame for debugging purposes"), | ||
.isError = true}); | ||
return *this; | ||
} | ||
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template<class T> | ||
EvalErrorBuilder<T> & EvalErrorBuilder<T>::addTrace(PosIdx pos, hintformat hint, bool frame) | ||
{ | ||
error.addTrace(error.state.positions[pos], hint, frame); | ||
return *this; | ||
} | ||
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template<class T> | ||
template<typename... Args> | ||
EvalErrorBuilder<T> & | ||
EvalErrorBuilder<T>::addTrace(PosIdx pos, std::string_view formatString, const Args &... formatArgs) | ||
{ | ||
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addTrace(error.state.positions[pos], hintfmt(std::string(formatString), formatArgs...)); | ||
return *this; | ||
} | ||
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template<class T> | ||
void EvalErrorBuilder<T>::debugThrow() | ||
{ | ||
if (error.state.debugRepl && !error.state.debugTraces.empty()) { | ||
const DebugTrace & last = error.state.debugTraces.front(); | ||
const Env * env = &last.env; | ||
const Expr * expr = &last.expr; | ||
error.state.runDebugRepl(&error, *env, *expr); | ||
} | ||
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throw error; | ||
} | ||
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template class EvalErrorBuilder<EvalError>; | ||
template class EvalErrorBuilder<AssertionError>; | ||
template class EvalErrorBuilder<ThrownError>; | ||
template class EvalErrorBuilder<Abort>; | ||
template class EvalErrorBuilder<TypeError>; | ||
template class EvalErrorBuilder<UndefinedVarError>; | ||
template class EvalErrorBuilder<MissingArgumentError>; | ||
template class EvalErrorBuilder<InfiniteRecursionError>; | ||
template class EvalErrorBuilder<CachedEvalError>; | ||
template class EvalErrorBuilder<InvalidPathError>; | ||
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} |
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Original file line number | Diff line number | Diff line change |
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#pragma once | ||
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#include "error.hh" | ||
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namespace nix { | ||
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class PosIdx; | ||
struct Env; | ||
struct Expr; | ||
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class EvalState; | ||
template<class T> | ||
class EvalErrorBuilder; | ||
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class EvalError : public Error | ||
{ | ||
template<class T> | ||
friend class EvalErrorBuilder; | ||
public: | ||
EvalState & state; | ||
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EvalError(EvalState & state, ErrorInfo && errorInfo) | ||
: Error(errorInfo) | ||
, state(state) | ||
{ | ||
} | ||
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template<typename... Args> | ||
explicit EvalError(EvalState & state, const std::string & formatString, const Args &... formatArgs) | ||
: Error(formatString, formatArgs...) | ||
, state(state) | ||
{ | ||
} | ||
}; | ||
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MakeError(ParseError, Error); | ||
MakeError(AssertionError, EvalError); | ||
MakeError(ThrownError, AssertionError); | ||
MakeError(Abort, EvalError); | ||
MakeError(TypeError, EvalError); | ||
MakeError(UndefinedVarError, EvalError); | ||
MakeError(MissingArgumentError, EvalError); | ||
MakeError(CachedEvalError, EvalError); | ||
MakeError(InfiniteRecursionError, EvalError); | ||
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struct InvalidPathError : public EvalError | ||
{ | ||
public: | ||
Path path; | ||
InvalidPathError(EvalState & state, const Path & path) | ||
: EvalError(state, "path '%s' is not valid", path) | ||
{ | ||
} | ||
#ifdef EXCEPTION_NEEDS_THROW_SPEC | ||
~InvalidPathError() throw(){}; | ||
#endif | ||
}; | ||
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template<class T> | ||
class EvalErrorBuilder | ||
{ | ||
public: | ||
T error; | ||
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template<typename... Args> | ||
explicit EvalErrorBuilder(EvalState & state, const Args &... args) | ||
: error(T(state, args...)) | ||
{ | ||
} | ||
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[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & withExitStatus(unsigned int exitStatus); | ||
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[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & atPos(PosIdx pos); | ||
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[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & withTrace(PosIdx pos, const std::string_view text); | ||
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[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & withFrameTrace(PosIdx pos, const std::string_view text); | ||
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[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & withSuggestions(Suggestions & s); | ||
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[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & withFrame(const Env & e, const Expr & ex); | ||
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[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & addTrace(PosIdx pos, hintformat hint, bool frame = false); | ||
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template<typename... Args> | ||
[[nodiscard, gnu::noinline]] EvalErrorBuilder<T> & | ||
addTrace(PosIdx pos, std::string_view formatString, const Args &... formatArgs); | ||
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[[gnu::noinline, gnu::noreturn]] virtual void debugThrow(); | ||
}; | ||
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} |
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