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primops/libexpr: use new attr-call extractor everywhere; use function's pos if attr-set pos == noPos

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Maximilian Bosch 2021-04-11 13:55:07 +02:00
parent f60473a077
commit ad7b47dc85
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GPG key ID: 091DBF4D1FC46B8E
1 changed files with 44 additions and 26 deletions
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70
src/libexpr/primops.cc
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@ -556,15 +556,29 @@ static Bindings::iterator extractAttrNameFromPrimopCall(
) {
Bindings::iterator value = attrSet->find(state.symbols.create(attrName));
if (value == attrSet->end()) {
auto e = TypeError({
.msg = hintfmt("attribute '%s' missing for call to '%s'", attrName, funcName),
.errPos = *attrSet->pos,
});
hintformat errorMsg = hintfmt(
"attribute '%s' missing for call to '%s'",
attrName,
funcName
);
// Adding another trace for the function name to make it clear
// which call received wrong arguments.
e.addTrace(pos, hintfmt("while invoking '%s'", funcName));
throw e;
Pos aPos = *attrSet->pos;
if (aPos == noPos) {
throw TypeError({
.msg = errorMsg,
.errPos = pos,
});
} else {
auto e = TypeError({
.msg = errorMsg,
.errPos = aPos,
});
// Adding another trace for the function name to make it clear
// which call received wrong arguments.
e.addTrace(pos, hintfmt("while invoking '%s'", funcName));
throw e;
}
}
return value;
@ -841,12 +855,14 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
state.forceAttrs(*args[0], pos);
/* Figure out the name first (for stack backtraces). */
Bindings::iterator attr = args[0]->attrs->find(state.sName);
if (attr == args[0]->attrs->end())
throw EvalError({
.msg = hintfmt("required attribute 'name' missing"),
.errPos = pos
});
Bindings::iterator attr = extractAttrNameFromPrimopCall(
state,
"derivationStrict",
state.sName,
args[0]->attrs,
pos
);
string drvName;
Pos & posDrvName(*attr->pos);
try {
@ -1394,12 +1410,13 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
if (i != v2.attrs->end())
prefix = state.forceStringNoCtx(*i->value, pos);
i = v2.attrs->find(state.symbols.create("path"));
if (i == v2.attrs->end())
throw EvalError({
.msg = hintfmt("attribute 'path' missing"),
.errPos = pos
});
i = extractAttrNameFromPrimopCall(
state,
"findFile",
"path",
v2.attrs,
pos
);
PathSet context;
string path = state.coerceToString(pos, *i->value, context, false, false);
@ -2041,12 +2058,13 @@ void prim_getAttr(EvalState & state, const Pos & pos, Value * * args, Value & v)
string attr = state.forceStringNoCtx(*args[0], pos);
state.forceAttrs(*args[1], pos);
// !!! Should we create a symbol here or just do a lookup?
Bindings::iterator i = args[1]->attrs->find(state.symbols.create(attr));
if (i == args[1]->attrs->end())
throw EvalError({
.msg = hintfmt("attribute '%1%' missing", attr),
.errPos = pos
});
Bindings::iterator i = extractAttrNameFromPrimopCall(
state,
"getAttr",
attr,
args[1]->attrs,
pos
);
// !!! add to stack trace?
if (state.countCalls && i->pos) state.attrSelects[*i->pos]++;
state.forceValue(*i->value, pos);