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mapEnvBindings

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This commit is contained in:
Ben Burdette 2021-06-11 18:55:15 -06:00
parent d22de1dd0c
commit 129dd760e6
1 changed files with 39 additions and 14 deletions
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53
src/libexpr/eval.cc
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@ -618,6 +618,15 @@ std::optional<EvalState::Doc> EvalState::getDoc(Value & v)
typedef std::map<std::string, Value *> valmap;
/*void addEnv(Value * v, valmap &vmap)
{
if (v.isThunk()) {
Env * env = v.thunk.env;
Expr * expr = v.thunk.expr;
}
*/
LocalNoInline(valmap * map0())
{
return new valmap();
@ -628,17 +637,16 @@ LocalNoInline(valmap * map1(const char *name, Value *v))
return new valmap({{name, v}});
}
LocalNoInline(valmap * map2(const char *name1, Value *v1, const char *name2, Value *v2))
{
return new valmap({{name1, v1}, {name2, v2}});
}
LocalNoInline(valmap * mapBindings(Bindings *b))
LocalNoInline(valmap * mapBindings(Bindings &b))
{
auto map = new valmap();
for (auto i = b->begin(); i != b->end(); ++i)
for (auto i = b.begin(); i != b.end(); ++i)
{
std::string s = i->name;
(*map)[s] = i->value;
@ -647,6 +655,15 @@ LocalNoInline(valmap * mapBindings(Bindings *b))
return map;
}
LocalNoInline(valmap * mapEnvBindings(Env &env))
{
if (env.values[0]->type() == nAttrs) {
return mapBindings(*env.values[0]->attrs);
} else {
return map0();
}
}
/* Every "format" object (even temporary) takes up a few hundred bytes
of stack space, which is a real killer in the recursive
evaluator. So here are some helper functions for throwing
@ -813,13 +830,11 @@ LocalNoInline(void addErrorTrace(Error & e, const Pos & pos, const char * s, con
e.addTrace(pos, s, s2);
}
void mkString(Value & v, const char * s)
{
v.mkString(dupString(s));
}
Value & mkString(Value & v, std::string_view s, const PathSet & context)
{
v.mkString(dupStringWithLen(s.data(), s.size()));
@ -862,7 +877,8 @@ inline Value * EvalState::lookupVar(Env * env, const ExprVar & var, bool noEval)
}
if (!env->prevWith)
// TODO: env.attrs?
throwUndefinedVarError(var.pos, "undefined variable '%1%'", var.name, map0());
throwUndefinedVarError(var.pos, "undefined variable '%1%'", var.name,
mapEnvBindings(*env));
for (size_t l = env->prevWith; l; --l, env = env->up) ;
}
}
@ -1171,7 +1187,8 @@ void ExprAttrs::eval(EvalState & state, Env & env, Value & v)
Bindings::iterator j = v.attrs->find(nameSym);
if (j != v.attrs->end())
throwEvalError(i.pos, "dynamic attribute '%1%' already defined at %2%", nameSym, *j->pos,
map1("value", &v)); // TODO dynamicAttrs to env?
mapEnvBindings(env));
// map1("value", &v)); // TODO dynamicAttrs to env?
i.valueExpr->setName(nameSym);
/* Keep sorted order so find can catch duplicates */
@ -1261,7 +1278,9 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
} else {
state.forceAttrs(*vAttrs, pos);
if ((j = vAttrs->attrs->find(name)) == vAttrs->attrs->end())
throwEvalError(pos, "attribute '%1%' missing", name, mapBindings(vAttrs->attrs));
throwEvalError(pos, "attribute '%1%' missing", name,
mapEnvBindings(env));
// mapBindings(*vAttrs->attrs));
}
vAttrs = j->value;
pos2 = j->pos;
@ -1519,7 +1538,8 @@ this case it must have its arguments supplied either by default
values, or passed explicitly with '--arg' or '--argstr'. See
https://nixos.org/manual/nix/stable/#ss-functions.)",
i.name,
map1("fun", &fun)); // todo add bindings + fun
mapBindings(args));
// map1("fun", &fun)); // todo add bindings + fun
}
}
}
@ -1704,15 +1724,20 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v)
firstType = nFloat;
nf = n;
nf += vTmp.fpoint;
} else
throwEvalError(pos, "cannot add %1% to an integer", showType(vTmp), map0());
} else {
std::cerr << "envtype: " << showType(env.values[0]->type()) << std::endl;
throwEvalError(pos, "cannot add %1% to an integer", showType(vTmp),
mapEnvBindings(env));
}
} else if (firstType == nFloat) {
if (vTmp.type() == nInt) {
nf += vTmp.integer;
} else if (vTmp.type() == nFloat) {
nf += vTmp.fpoint;
} else
throwEvalError(pos, "cannot add %1% to a float", showType(vTmp), map0());
throwEvalError(pos, "cannot add %1% to a float", showType(vTmp),
mapEnvBindings(env));
} else
s << state.coerceToString(pos, vTmp, context, false, firstType == nString);
}
@ -1871,10 +1896,10 @@ string EvalState::forceStringNoCtx(Value & v, const Pos & pos)
if (v.string.context) {
if (pos)
throwEvalError(pos, "the string '%1%' is not allowed to refer to a store path (such as '%2%')",
v.string.s, v.string.context[0], map1("value", &v));
v.string.s, v.string.context[0], map1("value", &v));
else
throwEvalError("the string '%1%' is not allowed to refer to a store path (such as '%2%')",
v.string.s, v.string.context[0], map1("value", &v));
v.string.s, v.string.context[0], map1("value", &v));
}
return s;
}