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missing argument error
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parent
7d9037035e
commit
3edfe6090e
2 changed files with 11 additions and 2 deletions
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@ -660,6 +660,14 @@ LocalNoInlineNoReturn(void throwUndefinedVarError(const Pos & pos, const char *
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});
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}
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LocalNoInlineNoReturn(void throwMissingArgumentError(const Pos & pos, const char * s, const string & s1))
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{
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throw MissingArgumentError({
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.hint = hintfmt(s, s1),
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.errPos = pos
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});
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}
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LocalNoInline(void addErrorTrace(Error & e, const char * s, const string & s2))
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{
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e.addTrace(std::nullopt, s, s2);
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@ -1365,7 +1373,7 @@ void EvalState::autoCallFunction(Bindings & args, Value & fun, Value & res)
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if (j != args.end()) {
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actualArgs->attrs->push_back(*j);
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} else if (!i.def) {
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throwUndefinedVarError(i.pos, R"(cannot auto-call a function that has an argument without a default value ('%1%')
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throwMissingArgumentError(i.pos, R"(cannot auto-call a function that has an argument without a default value ('%1%')
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An 'auto-call' is when a nix expression is evaluated without any external arguments.
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If that nix expression is a function, and that function's arguments all have default
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@ -1373,7 +1381,7 @@ values, then all is well.
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But if the function arguments don't have default values, evaluation fails.
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The classic case for this error is evaluating a nix file with nix-build that expects
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The classic case for this error is evaluating a nix file that expects
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to be evaluated by callPackage.
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# in 'callPackage' format: expression is a function that takes an argument 'stdenv'.
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# callPackage would implicitly pull 'stdenv' from nixpkgs, then call this function.
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@ -17,6 +17,7 @@ MakeError(ThrownError, AssertionError);
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MakeError(Abort, EvalError);
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MakeError(TypeError, EvalError);
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MakeError(UndefinedVarError, Error);
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MakeError(MissingArgumentError, Error);
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MakeError(RestrictedPathError, Error);
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