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forceString: Show position info

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This commit is contained in:
Eelco Dolstra 2014-04-04 21:14:11 +02:00
parent 27b44b8cf7
commit a5fe730940
6 changed files with 46 additions and 30 deletions
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33
src/libexpr/eval.cc
View file

@ -140,7 +140,8 @@ static void * oomHandler(size_t requested)
#endif
static Symbol getName(const AttrName & name, EvalState & state, Env & env) {
static Symbol getName(const AttrName & name, EvalState & state, Env & env)
{
if (name.symbol.set()) {
return name.symbol;
} else {
@ -279,6 +280,11 @@ LocalNoInlineNoReturn(void throwEvalError(const char * s, const string & s2, con
throw EvalError(format(s) % s2 % s3);
}
LocalNoInlineNoReturn(void throwEvalError(const char * s, const string & s2, const string & s3, const Pos & pos))
{
throw EvalError(format(s) % s2 % s3 % pos);
}
LocalNoInlineNoReturn(void throwEvalError(const char * s, const Symbol & sym, const Pos & p1, const Pos & p2))
{
throw EvalError(format(s) % sym % p1 % p2);
@ -1172,11 +1178,15 @@ void EvalState::forceFunction(Value & v, const Pos & pos)
}
string EvalState::forceString(Value & v)
string EvalState::forceString(Value & v, const Pos & pos)
{
forceValue(v);
if (v.type != tString)
throwTypeError("value is %1% while a string was expected", v);
if (v.type != tString) {
if (pos)
throwTypeError("value is %1% while a string was expected, at %2%", v, pos);
else
throwTypeError("value is %1% while a string was expected", v);
}
return string(v.string.s);
}
@ -1197,12 +1207,17 @@ string EvalState::forceString(Value & v, PathSet & context)
}
string EvalState::forceStringNoCtx(Value & v)
string EvalState::forceStringNoCtx(Value & v, const Pos & pos)
{
string s = forceString(v);
if (v.string.context)
throwEvalError("the string `%1%' is not allowed to refer to a store path (such as `%2%')",
v.string.s, v.string.context[0]);
string s = forceString(v, pos);
if (v.string.context) {
if (pos)
throwEvalError("the string `%1%' is not allowed to refer to a store path (such as `%2%'), at %3%",
v.string.s, v.string.context[0], pos);
else
throwEvalError("the string `%1%' is not allowed to refer to a store path (such as `%2%')",
v.string.s, v.string.context[0]);
}
return s;
}

4
src/libexpr/eval.hh
View file

@ -165,9 +165,9 @@ public:
inline void forceList(Value & v);
inline void forceList(Value & v, const Pos & pos);
void forceFunction(Value & v, const Pos & pos); // either lambda or primop
string forceString(Value & v);
string forceString(Value & v, const Pos & pos = noPos);
string forceString(Value & v, PathSet & context);
string forceStringNoCtx(Value & v);
string forceStringNoCtx(Value & v, const Pos & pos = noPos);
/* Return true iff the value `v' denotes a derivation (i.e. a
set with attribute `type = "derivation"'). */

9
src/libexpr/get-drvs.cc
View file

@ -41,7 +41,7 @@ DrvInfo::Outputs DrvInfo::queryOutputs()
/* For each output... */
for (unsigned int j = 0; j < i->value->list.length; ++j) {
/* Evaluate the corresponding set. */
string name = state->forceStringNoCtx(*i->value->list.elems[j]);
string name = state->forceStringNoCtx(*i->value->list.elems[j], *i->pos);
Bindings::iterator out = attrs->find(state->symbols.create(name));
if (out == attrs->end()) continue; // FIXME: throw error?
state->forceAttrs(*out->value);
@ -199,11 +199,8 @@ static bool getDerivation(EvalState & state, Value & v,
Bindings::iterator i2 = v.attrs->find(state.sSystem);
DrvInfo drv(
state,
state.forceStringNoCtx(*i->value),
attrPath,
i2 == v.attrs->end() ? "unknown" : state.forceStringNoCtx(*i2->value),
DrvInfo drv(state, state.forceStringNoCtx(*i->value), attrPath,
i2 == v.attrs->end() ? "unknown" : state.forceStringNoCtx(*i2->value, *i2->pos),
v.attrs);
drvs.push_back(drv);

2
src/libexpr/nixexpr.cc
View file

@ -145,7 +145,7 @@ void ExprPos::show(std::ostream & str)
std::ostream & operator << (std::ostream & str, const Pos & pos)
{
if (!pos.line)
if (!pos)
str << "undefined position";
else
str << (format("%1%:%2%:%3%") % pos.file % pos.line % pos.column).str();

4
src/libexpr/nixexpr.hh
View file

@ -28,6 +28,10 @@ struct Pos
Pos() : line(0), column(0) { };
Pos(const Symbol & file, unsigned int line, unsigned int column)
: file(file), line(line), column(column) { };
operator bool() const
{
return line != 0;
}
bool operator < (const Pos & p2) const
{
if (!line) return p2.line;

24
src/libexpr/primops.cc
View file

@ -299,7 +299,7 @@ static void prim_tryEval(EvalState & state, const Pos & pos, Value * * args, Val
/* Return an environment variable. Use with care. */
static void prim_getEnv(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string name = state.forceStringNoCtx(*args[0]);
string name = state.forceStringNoCtx(*args[0], pos);
mkString(v, getEnv(name));
}
@ -343,7 +343,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
string drvName;
Pos & posDrvName(*attr->pos);
try {
drvName = state.forceStringNoCtx(*attr->value);
drvName = state.forceStringNoCtx(*attr->value, pos);
} catch (Error & e) {
e.addPrefix(format("while evaluating the derivation attribute `name' at %1%:\n") % posDrvName);
throw;
@ -664,7 +664,7 @@ static void prim_toJSON(EvalState & state, const Pos & pos, Value * * args, Valu
static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
PathSet context;
string name = state.forceStringNoCtx(*args[0]);
string name = state.forceStringNoCtx(*args[0], pos);
string contents = state.forceString(*args[1], context);
PathSet refs;
@ -775,7 +775,7 @@ static void prim_attrNames(EvalState & state, const Pos & pos, Value * * args, V
/* Dynamic version of the `.' operator. */
void prim_getAttr(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string attr = state.forceStringNoCtx(*args[0]);
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));
@ -791,7 +791,7 @@ void prim_getAttr(EvalState & state, const Pos & pos, Value * * args, Value & v)
/* Return position information of the specified attribute. */
void prim_unsafeGetAttrPos(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string attr = state.forceStringNoCtx(*args[0]);
string attr = state.forceStringNoCtx(*args[0], pos);
state.forceAttrs(*args[1], pos);
Bindings::iterator i = args[1]->attrs->find(state.symbols.create(attr));
if (i == args[1]->attrs->end())
@ -804,7 +804,7 @@ void prim_unsafeGetAttrPos(EvalState & state, const Pos & pos, Value * * args, V
/* Dynamic version of the `?' operator. */
static void prim_hasAttr(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string attr = state.forceStringNoCtx(*args[0]);
string attr = state.forceStringNoCtx(*args[0], pos);
state.forceAttrs(*args[1], pos);
mkBool(v, args[1]->attrs->find(state.symbols.create(attr)) != args[1]->attrs->end());
}
@ -826,7 +826,7 @@ static void prim_removeAttrs(EvalState & state, const Pos & pos, Value * * args,
/* Get the attribute names to be removed. */
std::set<Symbol> names;
for (unsigned int i = 0; i < args[1]->list.length; ++i) {
state.forceStringNoCtx(*args[1]->list.elems[i]);
state.forceStringNoCtx(*args[1]->list.elems[i], pos);
names.insert(state.symbols.create(args[1]->list.elems[i]->string.s));
}
@ -861,7 +861,7 @@ static void prim_listToAttrs(EvalState & state, const Pos & pos, Value * * args,
Bindings::iterator j = v2.attrs->find(state.sName);
if (j == v2.attrs->end())
throw TypeError(format("`name' attribute missing in a call to `listToAttrs', at %1%") % pos);
string name = state.forceStringNoCtx(*j->value);
string name = state.forceStringNoCtx(*j->value, pos);
Symbol sym = state.symbols.create(name);
if (seen.find(sym) == seen.end()) {
@ -1168,7 +1168,7 @@ static void prim_unsafeDiscardOutputDependency(EvalState & state, const Pos & po
/* Return the cryptographic hash of a string in base-16. */
static void prim_hashString(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string type = state.forceStringNoCtx(*args[0]);
string type = state.forceStringNoCtx(*args[0], pos);
HashType ht = parseHashType(type);
if (ht == htUnknown)
throw Error(format("unknown hash type `%1%', at %2%") % type % pos);
@ -1187,7 +1187,7 @@ static void prim_hashString(EvalState & state, const Pos & pos, Value * * args,
static void prim_parseDrvName(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string name = state.forceStringNoCtx(*args[0]);
string name = state.forceStringNoCtx(*args[0], pos);
DrvName parsed(name);
state.mkAttrs(v, 2);
mkString(*state.allocAttr(v, state.sName), parsed.name);
@ -1198,8 +1198,8 @@ static void prim_parseDrvName(EvalState & state, const Pos & pos, Value * * args
static void prim_compareVersions(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
string version1 = state.forceStringNoCtx(*args[0]);
string version2 = state.forceStringNoCtx(*args[1]);
string version1 = state.forceStringNoCtx(*args[0], pos);
string version2 = state.forceStringNoCtx(*args[1], pos);
mkInt(v, compareVersions(version1, version2));
}