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Show which function argument was unexpected

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Fixes #116.
This commit is contained in:
Eelco Dolstra 2013-05-16 17:56:14 +02:00
parent 229567293c
commit 1b3a03f161
1 changed files with 9 additions and 5 deletions
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14
src/libexpr/eval.cc
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@ -765,11 +765,15 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
}
/* Check that each actual argument is listed as a formal
argument (unless the attribute match specifies a `...').
TODO: show the names of the expected/unexpected
arguments. */
if (!fun.lambda.fun->formals->ellipsis && attrsUsed != arg.attrs->size())
throwTypeError("function at %1% called with unexpected argument", fun.lambda.fun->pos);
argument (unless the attribute match specifies a `...'). */
if (!fun.lambda.fun->formals->ellipsis && attrsUsed != arg.attrs->size()) {
/* Nope, so show the first unexpected argument to the
user. */
foreach (Bindings::iterator, i, *arg.attrs)
if (fun.lambda.fun->formals->argNames.find(i->name) == fun.lambda.fun->formals->argNames.end())
throwTypeError("function at %1% called with unexpected argument `%2%'", fun.lambda.fun->pos, i->name);
abort(); // can't happen
}
}
nrFunctionCalls++;