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Style fixes

Browse source 
In particular, use std::make_shared and enumerate(). Also renamed some
fields to fit naming conventions.
This commit is contained in:
Eelco Dolstra 2022-05-05 12:29:14 +02:00
parent c98648bef0
commit dd8b91eebc
8 changed files with 247 additions and 305 deletions
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28
src/libcmd/command.cc
View file

@ -121,25 +121,23 @@ ref<EvalState> EvalCommand::getEvalState()
if (startReplOnEvalErrors)
debuggerHook = [evalState{ref<EvalState>(evalState)}](const Error * error, const Env & env, const Expr & expr) {
auto dts =
error && expr.getPos() ?
std::unique_ptr<DebugTraceStacker>(
new DebugTraceStacker(
*evalState,
DebugTrace
{.pos = (error->info().errPos ? *error->info().errPos : evalState->positions[expr.getPos()]),
.expr = expr,
.env = env,
.hint = error->info().msg,
.is_error = true
}))
: nullptr;
error && expr.getPos()
? std::make_unique<DebugTraceStacker>(
*evalState,
DebugTrace {
.pos = error->info().errPos ? *error->info().errPos : evalState->positions[expr.getPos()],
.expr = expr,
.env = env,
.hint = error->info().msg,
.isError = true
})
: nullptr;
if (error)
printError("%s\n\n" ANSI_BOLD "Starting REPL to allow you to inspect the current state of the evaluator.\n" ANSI_NORMAL, error->what());
if (expr.staticenv)
{
std::unique_ptr<valmap> vm(mapStaticEnvBindings(evalState->symbols, *expr.staticenv.get(), env));
if (expr.staticEnv) {
auto vm = mapStaticEnvBindings(evalState->symbols, *expr.staticEnv.get(), env);
runRepl(evalState, expr, *vm);
}
};

3
src/libcmd/command.hh
View file

@ -275,6 +275,7 @@ void printClosureDiff(
void runRepl(
ref<EvalState> evalState,
const Expr &expr,
const Expr & expr,
const std::map<std::string, Value *> & extraEnv);
}

85
src/libcmd/repl.cc
View file

@ -51,7 +51,7 @@ struct NixRepl
ref<EvalState> state;
Bindings * autoArgs;
int debugTraceIndex;
size_t debugTraceIndex;
Strings loadedFiles;
@ -79,7 +79,7 @@ struct NixRepl
void addVarToScope(const Symbol name, Value & v);
Expr * parseString(std::string s);
void evalString(std::string s, Value & v);
void loadDebugTraceEnv(DebugTrace &dt);
void loadDebugTraceEnv(DebugTrace & dt);
typedef std::set<Value *> ValuesSeen;
std::ostream & printValue(std::ostream & str, Value & v, unsigned int maxDepth);
@ -203,15 +203,16 @@ namespace {
}
}
std::ostream& showDebugTrace(std::ostream &out, const PosTable &positions, const DebugTrace &dt)
static std::ostream & showDebugTrace(std::ostream & out, const PosTable & positions, const DebugTrace & dt)
{
if (dt.is_error)
if (dt.isError)
out << ANSI_RED "error: " << ANSI_NORMAL;
out << dt.hint.str() << "\n";
// prefer direct pos, but if noPos then try the expr.
auto pos = (*dt.pos ? *dt.pos :
positions[(dt.expr.getPos() ? dt.expr.getPos() : noPos)]);
auto pos = *dt.pos
? *dt.pos
: positions[dt.expr.getPos() ? dt.expr.getPos() : noPos];
if (pos) {
printAtPos(pos, out);
@ -258,8 +259,7 @@ void NixRepl::mainLoop(const std::vector<std::string> & files)
while (true) {
// When continuing input from previous lines, don't print a prompt, just align to the same
// number of chars as the prompt.
if (!getLine(input, input.empty() ? "nix-repl> " : " "))
{
if (!getLine(input, input.empty() ? "nix-repl> " : " ")) {
// ctrl-D should exit the debugger.
state->debugStop = false;
state->debugQuit = true;
@ -279,8 +279,8 @@ void NixRepl::mainLoop(const std::vector<std::string> & files)
// in debugger mode, an EvalError should trigger another repl session.
// when that session returns the exception will land here. No need to show it again;
// show the error for this repl session instead.
if (debuggerHook && !this->state->debugTraces.empty())
showDebugTrace(std::cout, this->state->positions, this->state->debugTraces.front());
if (debuggerHook && !state->debugTraces.empty())
showDebugTrace(std::cout, state->positions, state->debugTraces.front());
else
printMsg(lvlError, e.msg());
} catch (Error & e) {
@ -437,22 +437,16 @@ StorePath NixRepl::getDerivationPath(Value & v) {
return *drvPath;
}
void NixRepl::loadDebugTraceEnv(DebugTrace &dt)
void NixRepl::loadDebugTraceEnv(DebugTrace & dt)
{
if (dt.expr.staticenv)
{
initEnv();
initEnv();
auto vm = std::make_unique<valmap>(*(mapStaticEnvBindings(this->state->symbols, *dt.expr.staticenv.get(), dt.env)));
if (dt.expr.staticEnv) {
auto vm = mapStaticEnvBindings(state->symbols, *dt.expr.staticEnv.get(), dt.env);
// add staticenv vars.
for (auto & [name, value] : *(vm.get())) {
this->addVarToScope(this->state->symbols.create(name), *value);
}
}
else
{
initEnv();
for (auto & [name, value] : *(vm.get()))
addVarToScope(state->symbols.create(name), *value);
}
}
@ -509,45 +503,31 @@ bool NixRepl::processLine(std::string line)
else if (command == ":d" || command == ":debug") {
if (arg == "stack") {
int idx = 0;
for (auto iter = this->state->debugTraces.begin();
iter != this->state->debugTraces.end();
++iter, ++idx) {
std::cout << "\n" << ANSI_BLUE << idx << ANSI_NORMAL << ": ";
showDebugTrace(std::cout, this->state->positions, *iter);
for (const auto & [idx, i] : enumerate(state->debugTraces)) {
std::cout << "\n" << ANSI_BLUE << idx << ANSI_NORMAL << ": ";
showDebugTrace(std::cout, state->positions, i);
}
} else if (arg == "env") {
int idx = 0;
for (auto iter = this->state->debugTraces.begin();
iter != this->state->debugTraces.end();
++iter, ++idx) {
if (idx == this->debugTraceIndex)
{
printEnvBindings(state->symbols,iter->expr, iter->env);
break;
}
for (const auto & [idx, i] : enumerate(state->debugTraces)) {
if (idx == debugTraceIndex) {
printEnvBindings(state->symbols, i.expr, i.env);
break;
}
}
}
else if (arg.compare(0,4,"show") == 0) {
else if (arg.compare(0, 4, "show") == 0) {
try {
// change the DebugTrace index.
debugTraceIndex = stoi(arg.substr(4));
}
catch (...)
{
}
} catch (...) { }
int idx = 0;
for (auto iter = this->state->debugTraces.begin();
iter != this->state->debugTraces.end();
++iter, ++idx) {
if (idx == this->debugTraceIndex)
{
for (const auto & [idx, i] : enumerate(state->debugTraces)) {
if (idx == debugTraceIndex) {
std::cout << "\n" << ANSI_BLUE << idx << ANSI_NORMAL << ": ";
showDebugTrace(std::cout, this->state->positions, *iter);
showDebugTrace(std::cout, state->positions, i);
std::cout << std::endl;
printEnvBindings(state->symbols,iter->expr, iter->env);
loadDebugTraceEnv(*iter);
printEnvBindings(state->symbols, i.expr, i.env);
loadDebugTraceEnv(i);
break;
}
}
@ -1032,9 +1012,8 @@ void runRepl(
repl->initEnv();
// add 'extra' vars.
for (auto & [name, value] : extraEnv) {
for (auto & [name, value] : extraEnv)
repl->addVarToScope(repl->state->symbols.create(name), *value);
}
repl->mainLoop({});
}

217
src/libexpr/eval.cc
View file

@ -466,7 +466,7 @@ EvalState::EvalState(
, env1AllocCache(std::make_shared<void *>(nullptr))
#endif
, baseEnv(allocEnv(128))
, staticBaseEnv(new StaticEnv(false, 0))
, staticBaseEnv{std::make_shared<StaticEnv>(false, nullptr)}
{
countCalls = getEnv("NIX_COUNT_CALLS").value_or("0") != "0";
@ -524,7 +524,7 @@ void EvalState::allowPath(const StorePath & storePath)
allowedPaths->insert(store->toRealPath(storePath));
}
void EvalState::allowAndSetStorePathString(const StorePath &storePath, Value & v)
void EvalState::allowAndSetStorePathString(const StorePath & storePath, Value & v)
{
allowPath(storePath);
@ -714,22 +714,19 @@ std::optional<EvalState::Doc> EvalState::getDoc(Value & v)
// just for the current level of StaticEnv, not the whole chain.
void printStaticEnvBindings(const SymbolTable &st, const StaticEnv &se)
void printStaticEnvBindings(const SymbolTable & st, const StaticEnv & se)
{
std::cout << ANSI_MAGENTA;
for (auto i = se.vars.begin(); i != se.vars.end(); ++i)
{
std::cout << st[i->first] << " ";
}
for (auto & i : se.vars)
std::cout << st[i.first] << " ";
std::cout << ANSI_NORMAL;
std::cout << std::endl;
}
// just for the current level of Env, not the whole chain.
void printWithBindings(const SymbolTable &st, const Env &env)
void printWithBindings(const SymbolTable & st, const Env & env)
{
if (env.type == Env::HasWithAttrs)
{
if (env.type == Env::HasWithAttrs) {
std::cout << "with: ";
std::cout << ANSI_MAGENTA;
Bindings::iterator j = env.values[0]->attrs->begin();
@ -742,7 +739,7 @@ void printWithBindings(const SymbolTable &st, const Env &env)
}
}
void printEnvBindings(const SymbolTable &st, const StaticEnv &se, const Env &env, int lvl)
void printEnvBindings(const SymbolTable & st, const StaticEnv & se, const Env & env, int lvl)
{
std::cout << "Env level " << lvl << std::endl;
@ -752,16 +749,13 @@ void printEnvBindings(const SymbolTable &st, const StaticEnv &se, const Env &env
printWithBindings(st, env);
std::cout << std::endl;
printEnvBindings(st, *se.up, *env.up, ++lvl);
}
else
{
} else {
std::cout << ANSI_MAGENTA;
// for the top level, don't print the double underscore ones; they are in builtins.
for (auto i = se.vars.begin(); i != se.vars.end(); ++i)
{
if (((std::string)st[i->first]).substr(0,2) != "__")
std::cout << st[i->first] << " ";
}
// for the top level, don't print the double underscore ones;
// they are in builtins.
for (auto & i : se.vars)
if (!hasPrefix(st[i.first], "__"))
std::cout << st[i.first] << " ";
std::cout << ANSI_NORMAL;
std::cout << std::endl;
printWithBindings(st, env); // probably nothing there for the top level.
@ -771,56 +765,50 @@ void printEnvBindings(const SymbolTable &st, const StaticEnv &se, const Env &env
}
// TODO: add accompanying env for With stuff.
void printEnvBindings(const SymbolTable &st, const Expr &expr, const Env &env)
void printEnvBindings(const SymbolTable & st, const Expr & expr, const Env & env)
{
// just print the names for now
if (expr.staticenv)
{
printEnvBindings(st, *expr.staticenv.get(), env, 0);
if (expr.staticEnv)
printEnvBindings(st, *expr.staticEnv.get(), env, 0);
}
void mapStaticEnvBindings(const SymbolTable & st, const StaticEnv & se, const Env & env, valmap & vm)
{
// add bindings for the next level up first, so that the bindings for this level
// override the higher levels.
// The top level bindings (builtins) are skipped since they are added for us by initEnv()
if (env.up && se.up) {
mapStaticEnvBindings(st, *se.up, *env.up, vm);
if (env.type == Env::HasWithAttrs) {
// add 'with' bindings.
Bindings::iterator j = env.values[0]->attrs->begin();
while (j != env.values[0]->attrs->end()) {
vm[st[j->name]] = j->value;
++j;
}
} else {
// iterate through staticenv bindings and add them.
for (auto & i : se.vars)
vm[st[i.first]] = env.values[i.second];
}
}
}
void mapStaticEnvBindings(const SymbolTable &st, const StaticEnv &se, const Env &env, valmap & vm)
std::unique_ptr<valmap> mapStaticEnvBindings(const SymbolTable & st, const StaticEnv & se, const Env & env)
{
// add bindings for the next level up first, so that the bindings for this level
// override the higher levels.
// The top level bindings (builtins) are skipped since they are added for us by initEnv()
if (env.up && se.up) {
mapStaticEnvBindings(st, *se.up, *env.up, vm);
if (env.type == Env::HasWithAttrs)
{
// add 'with' bindings.
Bindings::iterator j = env.values[0]->attrs->begin();
while (j != env.values[0]->attrs->end()) {
vm[st[j->name]] = j->value;
++j;
}
}
else
{
// iterate through staticenv bindings and add them.
for (auto iter = se.vars.begin(); iter != se.vars.end(); ++iter)
{
vm[st[iter->first]] = env.values[iter->second];
}
}
}
}
valmap * mapStaticEnvBindings(const SymbolTable &st,const StaticEnv &se, const Env &env)
{
auto vm = new valmap();
auto vm = std::make_unique<valmap>();
mapStaticEnvBindings(st, se, env, *vm);
return vm;
}
void EvalState::debugLastTrace(Error & e) const {
// call this in the situation where Expr and Env are inaccessible. The debugger will start in the last context
// that's in the DebugTrace stack.
void EvalState::debugLastTrace(Error & e) const
{
// Call this in the situation where Expr and Env are inaccessible.
// The debugger will start in the last context that's in the
// DebugTrace stack.
if (debuggerHook && !debugTraces.empty()) {
const DebugTrace &last = debugTraces.front();
const DebugTrace & last = debugTraces.front();
debuggerHook(&e, last.env, last.expr);
}
}
@ -829,7 +817,7 @@ void EvalState::debugLastTrace(Error & e) const {
of stack space, which is a real killer in the recursive
evaluator. So here are some helper functions for throwing
exceptions. */
void EvalState::throwEvalError(const PosIdx pos, const char * s, Env & env, Expr &expr) const
void EvalState::throwEvalError(const PosIdx pos, const char * s, Env & env, Expr & expr) const
{
auto error = EvalError({
.msg = hintfmt(s),
@ -864,7 +852,7 @@ void EvalState::throwEvalError(const char * s, const std::string & s2) const
}
void EvalState::throwEvalError(const PosIdx pos, const Suggestions & suggestions, const char * s,
const std::string & s2, Env & env, Expr &expr) const
const std::string & s2, Env & env, Expr & expr) const
{
auto error = EvalError(ErrorInfo{
.msg = hintfmt(s, s2),
@ -890,7 +878,7 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
throw error;
}
void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::string & s2, Env & env, Expr &expr) const
void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::string & s2, Env & env, Expr & expr) const
{
auto error = EvalError({
.msg = hintfmt(s, s2),
@ -900,7 +888,6 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
if (debuggerHook)
debuggerHook(&error, env, expr);
throw error;
}
@ -931,7 +918,7 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
}
void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::string & s2,
const std::string & s3, Env & env, Expr &expr) const
const std::string & s3, Env & env, Expr & expr) const
{
auto error = EvalError({
.msg = hintfmt(s, s2),
@ -944,7 +931,7 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
throw error;
}
void EvalState::throwEvalError(const PosIdx p1, const char * s, const Symbol sym, const PosIdx p2, Env & env, Expr &expr) const
void EvalState::throwEvalError(const PosIdx p1, const char * s, const Symbol sym, const PosIdx p2, Env & env, Expr & expr) const
{
// p1 is where the error occurred; p2 is a position mentioned in the message.
auto error = EvalError({
@ -970,7 +957,7 @@ void EvalState::throwTypeError(const PosIdx pos, const char * s, const Value & v
throw error;
}
void EvalState::throwTypeError(const PosIdx pos, const char * s, const Value & v, Env & env, Expr &expr) const
void EvalState::throwTypeError(const PosIdx pos, const char * s, const Value & v, Env & env, Expr & expr) const
{
auto error = TypeError({
.msg = hintfmt(s, showType(v)),
@ -1086,27 +1073,31 @@ void EvalState::addErrorTrace(Error & e, const PosIdx pos, const char * s, const
e.addTrace(positions[pos], s, s2);
}
std::unique_ptr<DebugTraceStacker> makeDebugTraceStacker(EvalState &state, Expr &expr, Env &env,
std::optional<ErrPos> pos, const char * s, const std::string & s2)
static std::unique_ptr<DebugTraceStacker> makeDebugTraceStacker(
EvalState & state,
Expr & expr,
Env & env,
std::optional<ErrPos> pos,
const char * s,
const std::string & s2)
{
return std::unique_ptr<DebugTraceStacker>(
new DebugTraceStacker(
state,
DebugTrace
{.pos = pos,
.expr = expr,
.env = env,
.hint = hintfmt(s, s2),
.is_error = false
}));
return std::make_unique<DebugTraceStacker>(state,
DebugTrace {
.pos = pos,
.expr = expr,
.env = env,
.hint = hintfmt(s, s2),
.isError = false
});
}
DebugTraceStacker::DebugTraceStacker(EvalState &evalState, DebugTrace t)
:evalState(evalState), trace(t)
DebugTraceStacker::DebugTraceStacker(EvalState & evalState, DebugTrace t)
: evalState(evalState)
, trace(std::move(t))
{
evalState.debugTraces.push_front(t);
evalState.debugTraces.push_front(trace);
if (evalState.debugStop && debuggerHook)
debuggerHook(0, t.env, t.expr);
debuggerHook(nullptr, trace.env, trace.expr);
}
void Value::mkString(std::string_view s)
@ -1303,15 +1294,14 @@ void EvalState::cacheFile(
fileParseCache[resolvedPath] = e;
try {
auto dts =
debuggerHook ?
makeDebugTraceStacker(
*this,
*e,
this->baseEnv,
(e->getPos() ? std::optional(ErrPos(positions[e->getPos()])) : std::nullopt),
"while evaluating the file '%1%':", resolvedPath)
: nullptr;
auto dts = debuggerHook
? makeDebugTraceStacker(
*this,
*e,
this->baseEnv,
e->getPos() ? std::optional(ErrPos(positions[e->getPos()])) : std::nullopt,
"while evaluating the file '%1%':", resolvedPath)
: nullptr;
// Enforce that 'flake.nix' is a direct attrset, not a
// computation.
@ -1538,15 +1528,14 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
e->eval(state, env, vTmp);
try {
auto dts =
debuggerHook ?
makeDebugTraceStacker(
state,
*this,
env,
state.positions[pos2],
"while evaluating the attribute '%1%'",
showAttrPath(state, env, attrPath))
auto dts = debuggerHook
? makeDebugTraceStacker(
state,
*this,
env,
state.positions[pos2],
"while evaluating the attribute '%1%'",
showAttrPath(state, env, attrPath))
: nullptr;
for (auto & i : attrPath) {
@ -1708,14 +1697,14 @@ void EvalState::callFunction(Value & fun, size_t nrArgs, Value * * args, Value &
/* Evaluate the body. */
try {
auto dts =
debuggerHook ?
makeDebugTraceStacker(*this, *lambda.body, env2, positions[lambda.pos],
"while evaluating %s",
(lambda.name
? concatStrings("'", symbols[lambda.name], "'")
: "anonymous lambda"))
: nullptr;
auto dts = debuggerHook
? makeDebugTraceStacker(
*this, *lambda.body, env2, positions[lambda.pos],
"while evaluating %s",
lambda.name
? concatStrings("'", symbols[lambda.name], "'")
: "anonymous lambda")
: nullptr;
lambda.body->eval(*this, env2, vCur);
} catch (Error & e) {
@ -2135,14 +2124,10 @@ void EvalState::forceValueDeep(Value & v)
if (v.type() == nAttrs) {
for (auto & i : *v.attrs)
try {
auto dts =
debuggerHook ?
// if the value is a thunk, we're evaling. otherwise no trace necessary.
(i.value->isThunk() ?
makeDebugTraceStacker(*this, *v.thunk.expr, *v.thunk.env, positions[i.pos],
"while evaluating the attribute '%1%'", symbols[i.name])
: nullptr)
// If the value is a thunk, we're evaling. Otherwise no trace necessary.
auto dts = debuggerHook && i.value->isThunk()
? makeDebugTraceStacker(*this, *v.thunk.expr, *v.thunk.env, positions[i.pos],
"while evaluating the attribute '%1%'", symbols[i.name])
: nullptr;
recurse(*i.value);

33
src/libexpr/eval.hh
View file

@ -25,8 +25,8 @@ enum RepairFlag : bool;
typedef void (* PrimOpFun) (EvalState & state, const PosIdx pos, Value * * args, Value & v);
void printEnvBindings(const SymbolTable &st, const Expr &expr, const Env &env);
void printEnvBindings(const SymbolTable &st, const StaticEnv &se, const Env &env, int lvl = 0);
void printEnvBindings(const SymbolTable & st, const Expr & expr, const Env & env);
void printEnvBindings(const SymbolTable & st, const StaticEnv & se, const Env & env, int lvl = 0);
struct PrimOp
{
@ -47,7 +47,7 @@ struct Env
Value * values[0];
};
valmap * mapStaticEnvBindings(const SymbolTable &st, const StaticEnv &se, const Env &env);
std::unique_ptr<valmap> mapStaticEnvBindings(const SymbolTable & st, const StaticEnv & se, const Env & env);
void copyContext(const Value & v, PathSet & context);
@ -75,10 +75,10 @@ std::shared_ptr<RegexCache> makeRegexCache();
struct DebugTrace {
std::optional<ErrPos> pos;
const Expr &expr;
const Env &env;
const Expr & expr;
const Env & env;
hintformat hint;
bool is_error;
bool isError;
};
class EvalState
@ -297,7 +297,7 @@ public:
void throwEvalError(const char * s, const std::string & s2, const std::string & s3) const;
[[gnu::noinline, gnu::noreturn]]
void throwEvalError(const PosIdx pos, const Suggestions & suggestions, const char * s, const std::string & s2,
Env & env, Expr &expr) const;
Env & env, Expr & expr) const;
[[gnu::noinline, gnu::noreturn]]
void throwEvalError(const PosIdx p1, const char * s, const Symbol sym, const PosIdx p2,
Env & env, Expr & expr) const;
@ -508,16 +508,15 @@ private:
friend struct Value;
};
class DebugTraceStacker {
public:
DebugTraceStacker(EvalState &evalState, DebugTrace t);
~DebugTraceStacker()
{
// assert(evalState.debugTraces.front() == trace);
evalState.debugTraces.pop_front();
}
EvalState &evalState;
DebugTrace trace;
struct DebugTraceStacker {
DebugTraceStacker(EvalState & evalState, DebugTrace t);
~DebugTraceStacker()
{
// assert(evalState.debugTraces.front() == trace);
evalState.debugTraces.pop_front();
}
EvalState & evalState;
DebugTrace trace;
};
/* Return a string representing the type of the value `v'. */

101
src/libexpr/nixexpr.cc
View file

@ -296,39 +296,38 @@ std::string showAttrPath(const SymbolTable & symbols, const AttrPath & attrPath)
/* Computing levels/displacements for variables. */
void Expr::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void Expr::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
abort();
}
void ExprInt::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprInt::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;}
void ExprFloat::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticEnv = env;
}
void ExprFloat::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprString::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
}
void ExprString::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprPath::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
}
void ExprPath::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprVar::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
}
void ExprVar::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
/* Check whether the variable appears in the environment. If so,
set its level and displacement. */
@ -353,20 +352,18 @@ void ExprVar::bindVars(const EvalState & es, const std::shared_ptr<const StaticE
enclosing `with'. If there is no `with', then we can issue an
"undefined variable" error now. */
if (withLevel == -1)
{
throw UndefinedVarError({
.msg = hintfmt("undefined variable '%1%'", es.symbols[name]),
.errPos = es.positions[pos]
});
}
fromWith = true;
this->level = withLevel;
}
void ExprSelect::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprSelect::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
e->bindVars(es, env);
if (def) def->bindVars(es, env);
@ -375,10 +372,10 @@ void ExprSelect::bindVars(const EvalState & es, const std::shared_ptr<const Stat
i.expr->bindVars(es, env);
}
void ExprOpHasAttr::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprOpHasAttr::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
e->bindVars(es, env);
for (auto & i : attrPath)
@ -386,13 +383,13 @@ void ExprOpHasAttr::bindVars(const EvalState & es, const std::shared_ptr<const S
i.expr->bindVars(es, env);
}
void ExprAttrs::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprAttrs::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
if (recursive) {
auto newEnv = std::shared_ptr<StaticEnv>(new StaticEnv(false, env.get(), recursive ? attrs.size() : 0));
auto newEnv = std::make_shared<StaticEnv>(false, env.get(), recursive ? attrs.size() : 0);
Displacement displ = 0;
for (auto & i : attrs)
@ -419,25 +416,24 @@ void ExprAttrs::bindVars(const EvalState & es, const std::shared_ptr<const Stati
}
}
void ExprList::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprList::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
for (auto & i : elems)
i->bindVars(es, env);
}
void ExprLambda::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprLambda::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
auto newEnv = std::shared_ptr<StaticEnv>(
new StaticEnv(
false, env.get(),
(hasFormals() ? formals->formals.size() : 0) +
(!arg ? 0 : 1)));
auto newEnv = std::make_shared<StaticEnv>(
false, env.get(),
(hasFormals() ? formals->formals.size() : 0) +
(!arg ? 0 : 1));
Displacement displ = 0;
@ -456,22 +452,22 @@ void ExprLambda::bindVars(const EvalState & es, const std::shared_ptr<const Stat
body->bindVars(es, newEnv);
}
void ExprCall::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprCall::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
fun->bindVars(es, env);
for (auto e : args)
e->bindVars(es, env);
}
void ExprLet::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprLet::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
auto newEnv = std::shared_ptr<StaticEnv>(new StaticEnv(false, env.get(), attrs->attrs.size()));
auto newEnv = std::make_shared<StaticEnv>(false, env.get(), attrs->attrs.size());
Displacement displ = 0;
for (auto & i : attrs->attrs)
@ -485,10 +481,10 @@ void ExprLet::bindVars(const EvalState & es, const std::shared_ptr<const StaticE
body->bindVars(es, newEnv);
}
void ExprWith::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprWith::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
/* Does this `with' have an enclosing `with'? If so, record its
level so that `lookupVar' can look up variables in the previous
@ -503,54 +499,53 @@ void ExprWith::bindVars(const EvalState & es, const std::shared_ptr<const Static
}
if (debuggerHook)
staticenv = env;
staticEnv = env;
attrs->bindVars(es, env);
auto newEnv = std::shared_ptr<StaticEnv>(new StaticEnv(true, env.get()));
auto newEnv = std::make_shared<StaticEnv>(true, env.get());
body->bindVars(es, newEnv);
}
void ExprIf::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprIf::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
cond->bindVars(es, env);
then->bindVars(es, env);
else_->bindVars(es, env);
}
void ExprAssert::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprAssert::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
cond->bindVars(es, env);
body->bindVars(es, env);
}
void ExprOpNot::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprOpNot::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
e->bindVars(es, env);
}
void ExprConcatStrings::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprConcatStrings::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
for (auto & i : *this->es)
i.second->bindVars(es, env);
}
void ExprPos::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
void ExprPos::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> & env)
{
if (debuggerHook)
staticenv = env;
staticEnv = env;
}

45
src/libexpr/nixexpr.hh
View file

@ -148,8 +148,8 @@ struct Expr
virtual void eval(EvalState & state, Env & env, Value & v);
virtual Value * maybeThunk(EvalState & state, Env & env);
virtual void setName(Symbol name);
std::shared_ptr<const StaticEnv> staticenv;
virtual const PosIdx getPos() const = 0;
std::shared_ptr<const StaticEnv> staticEnv;
virtual PosIdx getPos() const { return noPos; }
};
#define COMMON_METHODS \
@ -163,7 +163,6 @@ struct ExprInt : Expr
Value v;
ExprInt(NixInt n) : n(n) { v.mkInt(n); };
Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS
};
@ -173,7 +172,6 @@ struct ExprFloat : Expr
Value v;
ExprFloat(NixFloat nf) : nf(nf) { v.mkFloat(nf); };
Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS
};
@ -183,7 +181,6 @@ struct ExprString : Expr
Value v;
ExprString(std::string s) : s(std::move(s)) { v.mkString(this->s.data()); };
Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS
};
@ -193,7 +190,6 @@ struct ExprPath : Expr
Value v;
ExprPath(std::string s) : s(std::move(s)) { v.mkPath(this->s.c_str()); };
Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS
};
@ -221,7 +217,7 @@ struct ExprVar : Expr
ExprVar(Symbol name) : name(name) { };
ExprVar(const PosIdx & pos, Symbol name) : pos(pos), name(name) { };
Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -232,7 +228,7 @@ struct ExprSelect : Expr
AttrPath attrPath;
ExprSelect(const PosIdx & pos, Expr * e, const AttrPath & attrPath, Expr * def) : pos(pos), e(e), def(def), attrPath(attrPath) { };
ExprSelect(const PosIdx & pos, Expr * e, Symbol name) : pos(pos), e(e), def(0) { attrPath.push_back(AttrName(name)); };
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -241,7 +237,7 @@ struct ExprOpHasAttr : Expr
Expr * e;
AttrPath attrPath;
ExprOpHasAttr(Expr * e, const AttrPath & attrPath) : e(e), attrPath(attrPath) { };
const PosIdx getPos() const { return e->getPos(); }
PosIdx getPos() const override { return e->getPos(); }
COMMON_METHODS
};
@ -270,7 +266,7 @@ struct ExprAttrs : Expr
DynamicAttrDefs dynamicAttrs;
ExprAttrs(const PosIdx &pos) : recursive(false), pos(pos) { };
ExprAttrs() : recursive(false) { };
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -278,13 +274,12 @@ struct ExprList : Expr
{
std::vector<Expr *> elems;
ExprList() { };
const PosIdx getPos() const
{ if (elems.empty())
return noPos;
else
return elems.front()->getPos();
}
COMMON_METHODS
PosIdx getPos() const override
{
return elems.empty() ? noPos : elems.front()->getPos();
}
};
struct Formal
@ -337,7 +332,7 @@ struct ExprLambda : Expr
void setName(Symbol name);
std::string showNamePos(const EvalState & state) const;
inline bool hasFormals() const { return formals != nullptr; }
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -349,7 +344,7 @@ struct ExprCall : Expr
ExprCall(const PosIdx & pos, Expr * fun, std::vector<Expr *> && args)
: fun(fun), args(args), pos(pos)
{ }
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -358,7 +353,6 @@ struct ExprLet : Expr
ExprAttrs * attrs;
Expr * body;
ExprLet(ExprAttrs * attrs, Expr * body) : attrs(attrs), body(body) { };
const PosIdx getPos() const { return noPos; }
COMMON_METHODS
};
@ -368,7 +362,7 @@ struct ExprWith : Expr
Expr * attrs, * body;
size_t prevWith;
ExprWith(const PosIdx & pos, Expr * attrs, Expr * body) : pos(pos), attrs(attrs), body(body) { };
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -377,7 +371,7 @@ struct ExprIf : Expr
PosIdx pos;
Expr * cond, * then, * else_;
ExprIf(const PosIdx & pos, Expr * cond, Expr * then, Expr * else_) : pos(pos), cond(cond), then(then), else_(else_) { };
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -386,7 +380,7 @@ struct ExprAssert : Expr
PosIdx pos;
Expr * cond, * body;
ExprAssert(const PosIdx & pos, Expr * cond, Expr * body) : pos(pos), cond(cond), body(body) { };
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -394,7 +388,6 @@ struct ExprOpNot : Expr
{
Expr * e;
ExprOpNot(Expr * e) : e(e) { };
const PosIdx getPos() const { return noPos; }
COMMON_METHODS
};
@ -414,7 +407,7 @@ struct ExprOpNot : Expr
e1->bindVars(es, env); e2->bindVars(es, env); \
} \
void eval(EvalState & state, Env & env, Value & v); \
const PosIdx getPos() const { return pos; } \
PosIdx getPos() const override { return pos; } \
};
MakeBinOp(ExprOpEq, "==")
@ -432,7 +425,7 @@ struct ExprConcatStrings : Expr
std::vector<std::pair<PosIdx, Expr *> > * es;
ExprConcatStrings(const PosIdx & pos, bool forceString, std::vector<std::pair<PosIdx, Expr *> > * es)
: pos(pos), forceString(forceString), es(es) { };
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};
@ -440,7 +433,7 @@ struct ExprPos : Expr
{
PosIdx pos;
ExprPos(const PosIdx & pos) : pos(pos) { };
const PosIdx getPos() const { return pos; }
PosIdx getPos() const override { return pos; }
COMMON_METHODS
};

40
src/libexpr/primops.cc
View file

@ -227,7 +227,7 @@ static void import(EvalState & state, const PosIdx pos, Value & vPath, Value * v
Env * env = &state.allocEnv(vScope->attrs->size());
env->up = &state.baseEnv;
auto staticEnv = std::shared_ptr<StaticEnv>(new StaticEnv(false, state.staticBaseEnv.get(), vScope->attrs->size()));
auto staticEnv = std::make_shared<StaticEnv>(false, state.staticBaseEnv.get(), vScope->attrs->size());
unsigned int displ = 0;
for (auto & attr : *vScope->attrs) {
@ -329,8 +329,7 @@ void prim_importNative(EvalState & state, const PosIdx pos, Value * * args, Valu
std::string sym(state.forceStringNoCtx(*args[1], pos));
void *handle = dlopen(path.c_str(), RTLD_LAZY | RTLD_LOCAL);
if (!handle)
{
if (!handle) {
auto e = EvalError("could not open '%1%': %2%", path, dlerror());
state.debugLastTrace(e);
throw e;
@ -340,14 +339,11 @@ void prim_importNative(EvalState & state, const PosIdx pos, Value * * args, Valu
ValueInitializer func = (ValueInitializer) dlsym(handle, sym.c_str());
if(!func) {
char *message = dlerror();
if (message)
{
if (message) {
auto e = EvalError("could not load symbol '%1%' from '%2%': %3%", sym, path, message);
state.debugLastTrace(e);
throw e;
}
else
{
} else {
auto e = EvalError("symbol '%1%' from '%2%' resolved to NULL when a function pointer was expected",
sym, path);
state.debugLastTrace(e);
@ -573,8 +569,7 @@ struct CompareValues
return v1->fpoint < v2->integer;
if (v1->type() == nInt && v2->type() == nFloat)
return v1->integer < v2->fpoint;
if (v1->type() != v2->type())
{
if (v1->type() != v2->type()) {
auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
state.debugLastTrace(e);
throw e;
@ -599,12 +594,11 @@ struct CompareValues
return (*this)(v1->listElems()[i], v2->listElems()[i]);
}
}
default:
{
auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
state.debugLastTrace(e);
throw e;
}
default: {
auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
state.debugLastTrace(e);
throw e;
}
}
}
};
@ -703,8 +697,7 @@ static void prim_genericClosure(EvalState & state, const PosIdx pos, Value * * a
Bindings::iterator key =
e->attrs->find(state.sKey);
if (key == e->attrs->end())
{
if (key == e->attrs->end()) {
auto e = EvalError({
.msg = hintfmt("attribute 'key' required"),
.errPos = state.positions[pos]
@ -772,7 +765,7 @@ static RegisterPrimOp primop_break({
.name = "break",
.args = {"v"},
.doc = R"(
In debug mode, pause Nix expression evaluation and enter the repl.
In debug mode (enabled using `--debugger`), pause Nix expression evaluation and enter the REPL.
)",
.fun = [](EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
@ -783,16 +776,15 @@ static RegisterPrimOp primop_break({
.msg = hintfmt("breakpoint reached; value was %1%", s),
.errPos = state.positions[pos],
});
if (debuggerHook && !state.debugTraces.empty())
{
auto &dt = state.debugTraces.front();
if (debuggerHook && !state.debugTraces.empty()) {
auto & dt = state.debugTraces.front();
debuggerHook(&error, dt.env, dt.expr);
if (state.debugQuit) {
// if the user elects to quit the repl, throw an exception.
throw Error(ErrorInfo{
.level = lvlInfo,
.msg = hintfmt("quit from debugger"),
.msg = hintfmt("quit the debugger"),
.errPos = state.positions[noPos],
});
}
@ -903,7 +895,7 @@ static void prim_tryEval(EvalState & state, const PosIdx pos, Value * * args, Va
{
auto attrs = state.buildBindings(2);
auto saveDebuggerHook = debuggerHook;
debuggerHook = 0;
debuggerHook = nullptr;
try {
state.forceValue(*args[0], pos);
attrs.insert(state.sValue, args[0]);