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* Keep track of the source positions of attributes.

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This commit is contained in:
Eelco Dolstra 2010-05-07 12:11:05 +00:00
parent 84ce7ac76f
commit e2d5e40f4f
8 changed files with 117 additions and 86 deletions
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59
src/libexpr/eval.cc
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@ -44,7 +44,7 @@ std::ostream & operator << (std::ostream & str, Value & v)
case tAttrs:
str << "{ ";
foreach (Bindings::iterator, i, *v.attrs)
str << (string) i->first << " = " << i->second << "; ";
str << (string) i->first << " = " << i->second.value << "; ";
str << "}";
break;
case tList:
@ -128,7 +128,7 @@ void EvalState::addConstant(const string & name, Value & v)
staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
string name2 = string(name, 0, 2) == "__" ? string(name, 2) : name;
(*baseEnv.values[0].attrs)[symbols.create(name2)] = v;
(*baseEnv.values[0].attrs)[symbols.create(name2)].value = v;
}
@ -143,7 +143,7 @@ void EvalState::addPrimOp(const string & name,
v.primOp.name = strdup(name2.c_str());
staticBaseEnv.vars[symbols.create(name)] = baseEnvDispl;
baseEnv.values[baseEnvDispl++] = v;
(*baseEnv.values[0].attrs)[symbols.create(name2)] = v;
(*baseEnv.values[0].attrs)[symbols.create(name2)].value = v;
}
@ -202,6 +202,11 @@ LocalNoInline(void addErrorPrefix(Error & e, const char * s, const Pos & pos))
e.addPrefix(format(s) % pos);
}
LocalNoInline(void addErrorPrefix(Error & e, const char * s, const string & s2, const Pos & pos))
{
e.addPrefix(format(s) % s2 % pos);
}
void mkString(Value & v, const char * s)
{
@ -239,7 +244,7 @@ Value * EvalState::lookupVar(Env * env, const VarRef & var)
while (1) {
Bindings::iterator j = env->values[0].attrs->find(var.name);
if (j != env->values[0].attrs->end())
return &j->second;
return &j->second.value;
if (env->prevWith == 0)
throwEvalError("undefined variable `%1%'", var.name);
for (unsigned int l = env->prevWith; l; --l, env = env->up) ;
@ -290,8 +295,11 @@ void EvalState::mkThunk_(Value & v, Expr * expr)
void EvalState::cloneAttrs(Value & src, Value & dst)
{
mkAttrs(dst);
foreach (Bindings::iterator, i, *src.attrs)
mkCopy((*dst.attrs)[i->first], i->second);
foreach (Bindings::iterator, i, *src.attrs) {
Attr & a = (*dst.attrs)[i->first];
mkCopy(a.value, i->second.value);
a.pos = i->second.pos;
}
}
@ -414,15 +422,16 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
/* The recursive attributes are evaluated in the new
environment. */
foreach (Attrs::iterator, i, attrs) {
Value & v2 = (*v.attrs)[i->first];
mkCopy(v2, env2.values[displ]);
nix::Attr & a = (*v.attrs)[i->first];
mkCopy(a.value, env2.values[displ]);
mkThunk(env2.values[displ++], env2, i->second.first);
a.pos = &i->second.second;
}
/* The inherited attributes, on the other hand, are
evaluated in the original environment. */
foreach (list<VarRef>::iterator, i, inherited) {
Value & v2 = (*v.attrs)[i->name];
Value & v2 = (*v.attrs)[i->name].value;
Value * v3 = state.lookupVar(&env, *i);
mkCopy(v2, *v3);
mkCopy(env2.values[displ++], *v3);
@ -432,12 +441,13 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
else {
foreach (Attrs::iterator, i, attrs) {
Value & v2 = (*v.attrs)[i->first];
mkThunk(v2, env, i->second.first);
nix::Attr & a = (*v.attrs)[i->first];
mkThunk(a.value, env, i->second.first);
a.pos = &i->second.second;
}
foreach (list<VarRef>::iterator, i, inherited) {
Value & v2 = (*v.attrs)[i->name];
Value & v2 = (*v.attrs)[i->name].value;
mkCopy(v2, *state.lookupVar(&env, *i));
}
}
@ -494,12 +504,13 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
if (i == v2.attrs->end())
throwEvalError("attribute `%1%' missing", name);
try {
state.forceValue(i->second);
state.forceValue(i->second.value);
} catch (Error & e) {
addErrorPrefix(e, "while evaluating the attribute `%1%':\n", name);
addErrorPrefix(e, "while evaluating the attribute `%1%' at %2%:\n",
name, *i->second.pos);
throw;
}
v = i->second;
v = i->second.value;
}
@ -601,7 +612,7 @@ void EvalState::callFunction(Value & fun, Value & arg, Value & v)
mkThunk(env2.values[displ++], env2, i->def);
} else {
attrsUsed++;
mkCopy(env2.values[displ++], j->second);
mkCopy(env2.values[displ++], j->second.value);
}
}
@ -721,8 +732,11 @@ void ExprOpUpdate::eval(EvalState & state, Env & env, Value & v)
state.evalAttrs(env, e2, v2);
foreach (Bindings::iterator, i, *v2.attrs)
mkCopy((*v.attrs)[i->first], i->second);
foreach (Bindings::iterator, i, *v2.attrs) {
Attr & a = (*v.attrs)[i->first];
mkCopy(a.value, i->second.value);
a.pos = i->second.pos;
}
}
@ -802,7 +816,7 @@ void EvalState::strictForceValue(Value & v)
if (v.type == tAttrs) {
foreach (Bindings::iterator, i, *v.attrs)
strictForceValue(i->second);
strictForceValue(i->second.value);
}
else if (v.type == tList) {
@ -887,7 +901,7 @@ bool EvalState::isDerivation(Value & v)
{
if (v.type != tAttrs) return false;
Bindings::iterator i = v.attrs->find(sType);
return i != v.attrs->end() && forceStringNoCtx(i->second) == "derivation";
return i != v.attrs->end() && forceStringNoCtx(i->second.value) == "derivation";
}
@ -933,7 +947,7 @@ string EvalState::coerceToString(Value & v, PathSet & context,
Bindings::iterator i = v.attrs->find(sOutPath);
if (i == v.attrs->end())
throwTypeError("cannot coerce an attribute set (except a derivation) to a string");
return coerceToString(i->second, context, coerceMore, copyToStore);
return coerceToString(i->second.value, context, coerceMore, copyToStore);
}
if (coerceMore) {
@ -1021,7 +1035,8 @@ bool EvalState::eqValues(Value & v1, Value & v2)
if (v1.attrs->size() != v2.attrs->size()) return false;
Bindings::iterator i, j;
for (i = v1.attrs->begin(), j = v2.attrs->begin(); i != v1.attrs->end(); ++i, ++j)
if (i->first != j->first || !eqValues(i->second, j->second)) return false;
if (i->first != j->first || !eqValues(i->second.value, j->second.value))
return false;
return true;
}