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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) if (startReplOnEvalErrors)
debuggerHook = [evalState{ref<EvalState>(evalState)}](const Error * error, const Env & env, const Expr & expr) { debuggerHook = [evalState{ref<EvalState>(evalState)}](const Error * error, const Env & env, const Expr & expr) {
auto dts = auto dts =
error && expr.getPos() ? error && expr.getPos()
std::unique_ptr<DebugTraceStacker>( ? std::make_unique<DebugTraceStacker>(
new DebugTraceStacker( *evalState,
*evalState, DebugTrace {
DebugTrace .pos = error->info().errPos ? *error->info().errPos : evalState->positions[expr.getPos()],
{.pos = (error->info().errPos ? *error->info().errPos : evalState->positions[expr.getPos()]), .expr = expr,
.expr = expr, .env = env,
.env = env, .hint = error->info().msg,
.hint = error->info().msg, .isError = true
.is_error = true })
})) : nullptr;
: nullptr;
if (error) 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()); 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) if (expr.staticEnv) {
{ auto vm = mapStaticEnvBindings(evalState->symbols, *expr.staticEnv.get(), env);
std::unique_ptr<valmap> vm(mapStaticEnvBindings(evalState->symbols, *expr.staticenv.get(), env));
runRepl(evalState, expr, *vm); runRepl(evalState, expr, *vm);
} }
}; };

3
src/libcmd/command.hh
View file

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

85
src/libcmd/repl.cc
View file

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

217
src/libexpr/eval.cc
View file

@ -466,7 +466,7 @@ EvalState::EvalState(
, env1AllocCache(std::make_shared<void *>(nullptr)) , env1AllocCache(std::make_shared<void *>(nullptr))
#endif #endif
, baseEnv(allocEnv(128)) , baseEnv(allocEnv(128))
, staticBaseEnv(new StaticEnv(false, 0)) , staticBaseEnv{std::make_shared<StaticEnv>(false, nullptr)}
{ {
countCalls = getEnv("NIX_COUNT_CALLS").value_or("0") != "0"; countCalls = getEnv("NIX_COUNT_CALLS").value_or("0") != "0";
@ -524,7 +524,7 @@ void EvalState::allowPath(const StorePath & storePath)
allowedPaths->insert(store->toRealPath(storePath)); allowedPaths->insert(store->toRealPath(storePath));
} }
void EvalState::allowAndSetStorePathString(const StorePath &storePath, Value & v) void EvalState::allowAndSetStorePathString(const StorePath & storePath, Value & v)
{ {
allowPath(storePath); 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. // 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; std::cout << ANSI_MAGENTA;
for (auto i = se.vars.begin(); i != se.vars.end(); ++i) for (auto & i : se.vars)
{ std::cout << st[i.first] << " ";
std::cout << st[i->first] << " ";
}
std::cout << ANSI_NORMAL; std::cout << ANSI_NORMAL;
std::cout << std::endl; std::cout << std::endl;
} }
// just for the current level of Env, not the whole chain. // 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 << "with: ";
std::cout << ANSI_MAGENTA; std::cout << ANSI_MAGENTA;
Bindings::iterator j = env.values[0]->attrs->begin(); 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; 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); printWithBindings(st, env);
std::cout << std::endl; std::cout << std::endl;
printEnvBindings(st, *se.up, *env.up, ++lvl); printEnvBindings(st, *se.up, *env.up, ++lvl);
} } else {
else
{
std::cout << ANSI_MAGENTA; std::cout << ANSI_MAGENTA;
// for the top level, don't print the double underscore ones; they are in builtins. // for the top level, don't print the double underscore ones;
for (auto i = se.vars.begin(); i != se.vars.end(); ++i) // they are in builtins.
{ for (auto & i : se.vars)
if (((std::string)st[i->first]).substr(0,2) != "__") if (!hasPrefix(st[i.first], "__"))
std::cout << st[i->first] << " "; std::cout << st[i.first] << " ";
}
std::cout << ANSI_NORMAL; std::cout << ANSI_NORMAL;
std::cout << std::endl; std::cout << std::endl;
printWithBindings(st, env); // probably nothing there for the top level. 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. // 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 // just print the names for now
if (expr.staticenv) if (expr.staticEnv)
{ printEnvBindings(st, *expr.staticEnv.get(), env, 0);
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 auto vm = std::make_unique<valmap>();
// 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();
mapStaticEnvBindings(st, se, env, *vm); mapStaticEnvBindings(st, se, env, *vm);
return vm; return vm;
} }
void EvalState::debugLastTrace(Error & e) const
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 // Call this in the situation where Expr and Env are inaccessible.
// that's in the DebugTrace stack. // The debugger will start in the last context that's in the
// DebugTrace stack.
if (debuggerHook && !debugTraces.empty()) { if (debuggerHook && !debugTraces.empty()) {
const DebugTrace &last = debugTraces.front(); const DebugTrace & last = debugTraces.front();
debuggerHook(&e, last.env, last.expr); 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 of stack space, which is a real killer in the recursive
evaluator. So here are some helper functions for throwing evaluator. So here are some helper functions for throwing
exceptions. */ 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({ auto error = EvalError({
.msg = hintfmt(s), .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, 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{ auto error = EvalError(ErrorInfo{
.msg = hintfmt(s, s2), .msg = hintfmt(s, s2),
@ -890,7 +878,7 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
throw error; 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({ auto error = EvalError({
.msg = hintfmt(s, s2), .msg = hintfmt(s, s2),
@ -900,7 +888,6 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
if (debuggerHook) if (debuggerHook)
debuggerHook(&error, env, expr); debuggerHook(&error, env, expr);
throw error; 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, 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({ auto error = EvalError({
.msg = hintfmt(s, s2), .msg = hintfmt(s, s2),
@ -944,7 +931,7 @@ void EvalState::throwEvalError(const PosIdx pos, const char * s, const std::stri
throw error; 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. // p1 is where the error occurred; p2 is a position mentioned in the message.
auto error = EvalError({ auto error = EvalError({
@ -970,7 +957,7 @@ void EvalState::throwTypeError(const PosIdx pos, const char * s, const Value & v
throw error; 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({ auto error = TypeError({
.msg = hintfmt(s, showType(v)), .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); e.addTrace(positions[pos], s, s2);
} }
std::unique_ptr<DebugTraceStacker> makeDebugTraceStacker(EvalState &state, Expr &expr, Env &env, static std::unique_ptr<DebugTraceStacker> makeDebugTraceStacker(
std::optional<ErrPos> pos, const char * s, const std::string & s2) EvalState & state,
Expr & expr,
Env & env,
std::optional<ErrPos> pos,
const char * s,
const std::string & s2)
{ {
return std::unique_ptr<DebugTraceStacker>( return std::make_unique<DebugTraceStacker>(state,
new DebugTraceStacker( DebugTrace {
state, .pos = pos,
DebugTrace .expr = expr,
{.pos = pos, .env = env,
.expr = expr, .hint = hintfmt(s, s2),
.env = env, .isError = false
.hint = hintfmt(s, s2), });
.is_error = false
}));
} }
DebugTraceStacker::DebugTraceStacker(EvalState &evalState, DebugTrace t) DebugTraceStacker::DebugTraceStacker(EvalState & evalState, DebugTrace t)
:evalState(evalState), trace(t) : evalState(evalState)
, trace(std::move(t))
{ {
evalState.debugTraces.push_front(t); evalState.debugTraces.push_front(trace);
if (evalState.debugStop && debuggerHook) if (evalState.debugStop && debuggerHook)
debuggerHook(0, t.env, t.expr); debuggerHook(nullptr, trace.env, trace.expr);
} }
void Value::mkString(std::string_view s) void Value::mkString(std::string_view s)
@ -1303,15 +1294,14 @@ void EvalState::cacheFile(
fileParseCache[resolvedPath] = e; fileParseCache[resolvedPath] = e;
try { try {
auto dts = auto dts = debuggerHook
debuggerHook ? ? makeDebugTraceStacker(
makeDebugTraceStacker( *this,
*this, *e,
*e, this->baseEnv,
this->baseEnv, e->getPos() ? std::optional(ErrPos(positions[e->getPos()])) : std::nullopt,
(e->getPos() ? std::optional(ErrPos(positions[e->getPos()])) : std::nullopt), "while evaluating the file '%1%':", resolvedPath)
"while evaluating the file '%1%':", resolvedPath) : nullptr;
: nullptr;
// Enforce that 'flake.nix' is a direct attrset, not a // Enforce that 'flake.nix' is a direct attrset, not a
// computation. // computation.
@ -1538,15 +1528,14 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
e->eval(state, env, vTmp); e->eval(state, env, vTmp);
try { try {
auto dts = auto dts = debuggerHook
debuggerHook ? ? makeDebugTraceStacker(
makeDebugTraceStacker( state,
state, *this,
*this, env,
env, state.positions[pos2],
state.positions[pos2], "while evaluating the attribute '%1%'",
"while evaluating the attribute '%1%'", showAttrPath(state, env, attrPath))
showAttrPath(state, env, attrPath))
: nullptr; : nullptr;
for (auto & i : attrPath) { for (auto & i : attrPath) {
@ -1708,14 +1697,14 @@ void EvalState::callFunction(Value & fun, size_t nrArgs, Value * * args, Value &
/* Evaluate the body. */ /* Evaluate the body. */
try { try {
auto dts = auto dts = debuggerHook
debuggerHook ? ? makeDebugTraceStacker(
makeDebugTraceStacker(*this, *lambda.body, env2, positions[lambda.pos], *this, *lambda.body, env2, positions[lambda.pos],
"while evaluating %s", "while evaluating %s",
(lambda.name lambda.name
? concatStrings("'", symbols[lambda.name], "'") ? concatStrings("'", symbols[lambda.name], "'")
: "anonymous lambda")) : "anonymous lambda")
: nullptr; : nullptr;
lambda.body->eval(*this, env2, vCur); lambda.body->eval(*this, env2, vCur);
} catch (Error & e) { } catch (Error & e) {
@ -2135,14 +2124,10 @@ void EvalState::forceValueDeep(Value & v)
if (v.type() == nAttrs) { if (v.type() == nAttrs) {
for (auto & i : *v.attrs) for (auto & i : *v.attrs)
try { try {
// If the value is a thunk, we're evaling. Otherwise no trace necessary.
auto dts = auto dts = debuggerHook && i.value->isThunk()
debuggerHook ? ? makeDebugTraceStacker(*this, *v.thunk.expr, *v.thunk.env, positions[i.pos],
// if the value is a thunk, we're evaling. otherwise no trace necessary. "while evaluating the attribute '%1%'", symbols[i.name])
(i.value->isThunk() ?
makeDebugTraceStacker(*this, *v.thunk.expr, *v.thunk.env, positions[i.pos],
"while evaluating the attribute '%1%'", symbols[i.name])
: nullptr)
: nullptr; : nullptr;
recurse(*i.value); 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); 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 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 StaticEnv & se, const Env & env, int lvl = 0);
struct PrimOp struct PrimOp
{ {
@ -47,7 +47,7 @@ struct Env
Value * values[0]; 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); void copyContext(const Value & v, PathSet & context);
@ -75,10 +75,10 @@ std::shared_ptr<RegexCache> makeRegexCache();
struct DebugTrace { struct DebugTrace {
std::optional<ErrPos> pos; std::optional<ErrPos> pos;
const Expr &expr; const Expr & expr;
const Env &env; const Env & env;
hintformat hint; hintformat hint;
bool is_error; bool isError;
}; };
class EvalState class EvalState
@ -297,7 +297,7 @@ public:
void throwEvalError(const char * s, const std::string & s2, const std::string & s3) const; void throwEvalError(const char * s, const std::string & s2, const std::string & s3) const;
[[gnu::noinline, gnu::noreturn]] [[gnu::noinline, gnu::noreturn]]
void throwEvalError(const PosIdx pos, const Suggestions & suggestions, const char * s, const std::string & s2, 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]] [[gnu::noinline, gnu::noreturn]]
void throwEvalError(const PosIdx p1, const char * s, const Symbol sym, const PosIdx p2, void throwEvalError(const PosIdx p1, const char * s, const Symbol sym, const PosIdx p2,
Env & env, Expr & expr) const; Env & env, Expr & expr) const;
@ -508,16 +508,15 @@ private:
friend struct Value; friend struct Value;
}; };
class DebugTraceStacker { struct DebugTraceStacker {
public: DebugTraceStacker(EvalState & evalState, DebugTrace t);
DebugTraceStacker(EvalState &evalState, DebugTrace t); ~DebugTraceStacker()
~DebugTraceStacker() {
{ // assert(evalState.debugTraces.front() == trace);
// assert(evalState.debugTraces.front() == trace); evalState.debugTraces.pop_front();
evalState.debugTraces.pop_front(); }
} EvalState & evalState;
EvalState &evalState; DebugTrace trace;
DebugTrace trace;
}; };
/* Return a string representing the type of the value `v'. */ /* 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. */ /* 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(); 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) 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) 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) 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) if (debuggerHook)
staticenv = env; staticEnv = env;
}
void ExprVar::bindVars(const EvalState & es, const std::shared_ptr<const StaticEnv> &env)
{
if (debuggerHook)
staticenv = env;
/* Check whether the variable appears in the environment. If so, /* Check whether the variable appears in the environment. If so,
set its level and displacement. */ 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 enclosing `with'. If there is no `with', then we can issue an
"undefined variable" error now. */ "undefined variable" error now. */
if (withLevel == -1) if (withLevel == -1)
{
throw UndefinedVarError({ throw UndefinedVarError({
.msg = hintfmt("undefined variable '%1%'", es.symbols[name]), .msg = hintfmt("undefined variable '%1%'", es.symbols[name]),
.errPos = es.positions[pos] .errPos = es.positions[pos]
}); });
}
fromWith = true; fromWith = true;
this->level = withLevel; 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) if (debuggerHook)
staticenv = env; staticEnv = env;
e->bindVars(es, env); e->bindVars(es, env);
if (def) def->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); 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) if (debuggerHook)
staticenv = env; staticEnv = env;
e->bindVars(es, env); e->bindVars(es, env);
for (auto & i : attrPath) 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); 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) if (debuggerHook)
staticenv = env; staticEnv = env;
if (recursive) { 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; Displacement displ = 0;
for (auto & i : attrs) 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) if (debuggerHook)
staticenv = env; staticEnv = env;
for (auto & i : elems) for (auto & i : elems)
i->bindVars(es, env); 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) if (debuggerHook)
staticenv = env; staticEnv = env;
auto newEnv = std::shared_ptr<StaticEnv>( auto newEnv = std::make_shared<StaticEnv>(
new StaticEnv( false, env.get(),
false, env.get(), (hasFormals() ? formals->formals.size() : 0) +
(hasFormals() ? formals->formals.size() : 0) + (!arg ? 0 : 1));
(!arg ? 0 : 1)));
Displacement displ = 0; Displacement displ = 0;
@ -456,22 +452,22 @@ void ExprLambda::bindVars(const EvalState & es, const std::shared_ptr<const Stat
body->bindVars(es, newEnv); 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) if (debuggerHook)
staticenv = env; staticEnv = env;
fun->bindVars(es, env); fun->bindVars(es, env);
for (auto e : args) for (auto e : args)
e->bindVars(es, env); 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) 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; Displacement displ = 0;
for (auto & i : attrs->attrs) 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); 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) if (debuggerHook)
staticenv = env; staticEnv = env;
/* Does this `with' have an enclosing `with'? If so, record its /* Does this `with' have an enclosing `with'? If so, record its
level so that `lookupVar' can look up variables in the previous 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) if (debuggerHook)
staticenv = env; staticEnv = env;
attrs->bindVars(es, 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); 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) if (debuggerHook)
staticenv = env; staticEnv = env;
cond->bindVars(es, env); cond->bindVars(es, env);
then->bindVars(es, env); then->bindVars(es, env);
else_->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) if (debuggerHook)
staticenv = env; staticEnv = env;
cond->bindVars(es, env); cond->bindVars(es, env);
body->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) if (debuggerHook)
staticenv = env; staticEnv = env;
e->bindVars(es, 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) if (debuggerHook)
staticenv = env; staticEnv = env;
for (auto & i : *this->es) for (auto & i : *this->es)
i.second->bindVars(es, env); 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) 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 void eval(EvalState & state, Env & env, Value & v);
virtual Value * maybeThunk(EvalState & state, Env & env); virtual Value * maybeThunk(EvalState & state, Env & env);
virtual void setName(Symbol name); virtual void setName(Symbol name);
std::shared_ptr<const StaticEnv> staticenv; std::shared_ptr<const StaticEnv> staticEnv;
virtual const PosIdx getPos() const = 0; virtual PosIdx getPos() const { return noPos; }
}; };
#define COMMON_METHODS \ #define COMMON_METHODS \
@ -163,7 +163,6 @@ struct ExprInt : Expr
Value v; Value v;
ExprInt(NixInt n) : n(n) { v.mkInt(n); }; ExprInt(NixInt n) : n(n) { v.mkInt(n); };
Value * maybeThunk(EvalState & state, Env & env); Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -173,7 +172,6 @@ struct ExprFloat : Expr
Value v; Value v;
ExprFloat(NixFloat nf) : nf(nf) { v.mkFloat(nf); }; ExprFloat(NixFloat nf) : nf(nf) { v.mkFloat(nf); };
Value * maybeThunk(EvalState & state, Env & env); Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -183,7 +181,6 @@ struct ExprString : Expr
Value v; Value v;
ExprString(std::string s) : s(std::move(s)) { v.mkString(this->s.data()); }; ExprString(std::string s) : s(std::move(s)) { v.mkString(this->s.data()); };
Value * maybeThunk(EvalState & state, Env & env); Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -193,7 +190,6 @@ struct ExprPath : Expr
Value v; Value v;
ExprPath(std::string s) : s(std::move(s)) { v.mkPath(this->s.c_str()); }; ExprPath(std::string s) : s(std::move(s)) { v.mkPath(this->s.c_str()); };
Value * maybeThunk(EvalState & state, Env & env); Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return noPos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -221,7 +217,7 @@ struct ExprVar : Expr
ExprVar(Symbol name) : name(name) { }; ExprVar(Symbol name) : name(name) { };
ExprVar(const PosIdx & pos, Symbol name) : pos(pos), name(name) { }; ExprVar(const PosIdx & pos, Symbol name) : pos(pos), name(name) { };
Value * maybeThunk(EvalState & state, Env & env); Value * maybeThunk(EvalState & state, Env & env);
const PosIdx getPos() const { return pos; } PosIdx getPos() const override { return pos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -232,7 +228,7 @@ struct ExprSelect : Expr
AttrPath attrPath; 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, 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)); }; 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 COMMON_METHODS
}; };
@ -241,7 +237,7 @@ struct ExprOpHasAttr : Expr
Expr * e; Expr * e;
AttrPath attrPath; AttrPath attrPath;
ExprOpHasAttr(Expr * e, const AttrPath & attrPath) : e(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 COMMON_METHODS
}; };
@ -270,7 +266,7 @@ struct ExprAttrs : Expr
DynamicAttrDefs dynamicAttrs; DynamicAttrDefs dynamicAttrs;
ExprAttrs(const PosIdx &pos) : recursive(false), pos(pos) { }; ExprAttrs(const PosIdx &pos) : recursive(false), pos(pos) { };
ExprAttrs() : recursive(false) { }; ExprAttrs() : recursive(false) { };
const PosIdx getPos() const { return pos; } PosIdx getPos() const override { return pos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -278,13 +274,12 @@ struct ExprList : Expr
{ {
std::vector<Expr *> elems; std::vector<Expr *> elems;
ExprList() { }; ExprList() { };
const PosIdx getPos() const
{ if (elems.empty())
return noPos;
else
return elems.front()->getPos();
}
COMMON_METHODS COMMON_METHODS
PosIdx getPos() const override
{
return elems.empty() ? noPos : elems.front()->getPos();
}
}; };
struct Formal struct Formal
@ -337,7 +332,7 @@ struct ExprLambda : Expr
void setName(Symbol name); void setName(Symbol name);
std::string showNamePos(const EvalState & state) const; std::string showNamePos(const EvalState & state) const;
inline bool hasFormals() const { return formals != nullptr; } inline bool hasFormals() const { return formals != nullptr; }
const PosIdx getPos() const { return pos; } PosIdx getPos() const override { return pos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -349,7 +344,7 @@ struct ExprCall : Expr
ExprCall(const PosIdx & pos, Expr * fun, std::vector<Expr *> && args) ExprCall(const PosIdx & pos, Expr * fun, std::vector<Expr *> && args)
: fun(fun), args(args), pos(pos) : fun(fun), args(args), pos(pos)
{ } { }
const PosIdx getPos() const { return pos; } PosIdx getPos() const override { return pos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -358,7 +353,6 @@ struct ExprLet : Expr
ExprAttrs * attrs; ExprAttrs * attrs;
Expr * body; Expr * body;
ExprLet(ExprAttrs * attrs, Expr * body) : attrs(attrs), body(body) { }; ExprLet(ExprAttrs * attrs, Expr * body) : attrs(attrs), body(body) { };
const PosIdx getPos() const { return noPos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -368,7 +362,7 @@ struct ExprWith : Expr
Expr * attrs, * body; Expr * attrs, * body;
size_t prevWith; size_t prevWith;
ExprWith(const PosIdx & pos, Expr * attrs, Expr * body) : pos(pos), attrs(attrs), body(body) { }; 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 COMMON_METHODS
}; };
@ -377,7 +371,7 @@ struct ExprIf : Expr
PosIdx pos; PosIdx pos;
Expr * cond, * then, * else_; Expr * cond, * then, * else_;
ExprIf(const PosIdx & pos, Expr * cond, Expr * then, Expr * else_) : pos(pos), cond(cond), then(then), else_(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 COMMON_METHODS
}; };
@ -386,7 +380,7 @@ struct ExprAssert : Expr
PosIdx pos; PosIdx pos;
Expr * cond, * body; Expr * cond, * body;
ExprAssert(const PosIdx & pos, Expr * cond, Expr * body) : pos(pos), cond(cond), body(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 COMMON_METHODS
}; };
@ -394,7 +388,6 @@ struct ExprOpNot : Expr
{ {
Expr * e; Expr * e;
ExprOpNot(Expr * e) : e(e) { }; ExprOpNot(Expr * e) : e(e) { };
const PosIdx getPos() const { return noPos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -414,7 +407,7 @@ struct ExprOpNot : Expr
e1->bindVars(es, env); e2->bindVars(es, env); \ e1->bindVars(es, env); e2->bindVars(es, env); \
} \ } \
void eval(EvalState & state, Env & env, Value & v); \ void eval(EvalState & state, Env & env, Value & v); \
const PosIdx getPos() const { return pos; } \ PosIdx getPos() const override { return pos; } \
}; };
MakeBinOp(ExprOpEq, "==") MakeBinOp(ExprOpEq, "==")
@ -432,7 +425,7 @@ struct ExprConcatStrings : Expr
std::vector<std::pair<PosIdx, Expr *> > * es; std::vector<std::pair<PosIdx, Expr *> > * es;
ExprConcatStrings(const PosIdx & pos, bool forceString, 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) { }; : pos(pos), forceString(forceString), es(es) { };
const PosIdx getPos() const { return pos; } PosIdx getPos() const override { return pos; }
COMMON_METHODS COMMON_METHODS
}; };
@ -440,7 +433,7 @@ struct ExprPos : Expr
{ {
PosIdx pos; PosIdx pos;
ExprPos(const PosIdx & pos) : pos(pos) { }; ExprPos(const PosIdx & pos) : pos(pos) { };
const PosIdx getPos() const { return pos; } PosIdx getPos() const override { return pos; }
COMMON_METHODS 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 * env = &state.allocEnv(vScope->attrs->size());
env->up = &state.baseEnv; 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; unsigned int displ = 0;
for (auto & attr : *vScope->attrs) { 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)); std::string sym(state.forceStringNoCtx(*args[1], pos));
void *handle = dlopen(path.c_str(), RTLD_LAZY | RTLD_LOCAL); void *handle = dlopen(path.c_str(), RTLD_LAZY | RTLD_LOCAL);
if (!handle) if (!handle) {
{
auto e = EvalError("could not open '%1%': %2%", path, dlerror()); auto e = EvalError("could not open '%1%': %2%", path, dlerror());
state.debugLastTrace(e); state.debugLastTrace(e);
throw 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()); ValueInitializer func = (ValueInitializer) dlsym(handle, sym.c_str());
if(!func) { if(!func) {
char *message = dlerror(); char *message = dlerror();
if (message) if (message) {
{
auto e = EvalError("could not load symbol '%1%' from '%2%': %3%", sym, path, message); auto e = EvalError("could not load symbol '%1%' from '%2%': %3%", sym, path, message);
state.debugLastTrace(e); state.debugLastTrace(e);
throw e; throw e;
} } else {
else
{
auto e = EvalError("symbol '%1%' from '%2%' resolved to NULL when a function pointer was expected", auto e = EvalError("symbol '%1%' from '%2%' resolved to NULL when a function pointer was expected",
sym, path); sym, path);
state.debugLastTrace(e); state.debugLastTrace(e);
@ -573,8 +569,7 @@ struct CompareValues
return v1->fpoint < v2->integer; return v1->fpoint < v2->integer;
if (v1->type() == nInt && v2->type() == nFloat) if (v1->type() == nInt && v2->type() == nFloat)
return v1->integer < v2->fpoint; 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)); auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
state.debugLastTrace(e); state.debugLastTrace(e);
throw e; throw e;
@ -599,12 +594,11 @@ struct CompareValues
return (*this)(v1->listElems()[i], v2->listElems()[i]); return (*this)(v1->listElems()[i], v2->listElems()[i]);
} }
} }
default: default: {
{ auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2));
auto e = EvalError("cannot compare %1% with %2%", showType(*v1), showType(*v2)); state.debugLastTrace(e);
state.debugLastTrace(e); throw e;
throw e; }
}
} }
} }
}; };
@ -703,8 +697,7 @@ static void prim_genericClosure(EvalState & state, const PosIdx pos, Value * * a
Bindings::iterator key = Bindings::iterator key =
e->attrs->find(state.sKey); e->attrs->find(state.sKey);
if (key == e->attrs->end()) if (key == e->attrs->end()) {
{
auto e = EvalError({ auto e = EvalError({
.msg = hintfmt("attribute 'key' required"), .msg = hintfmt("attribute 'key' required"),
.errPos = state.positions[pos] .errPos = state.positions[pos]
@ -772,7 +765,7 @@ static RegisterPrimOp primop_break({
.name = "break", .name = "break",
.args = {"v"}, .args = {"v"},
.doc = R"( .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) .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), .msg = hintfmt("breakpoint reached; value was %1%", s),
.errPos = state.positions[pos], .errPos = state.positions[pos],
}); });
if (debuggerHook && !state.debugTraces.empty()) if (debuggerHook && !state.debugTraces.empty()) {
{ auto & dt = state.debugTraces.front();
auto &dt = state.debugTraces.front();
debuggerHook(&error, dt.env, dt.expr); debuggerHook(&error, dt.env, dt.expr);
if (state.debugQuit) { if (state.debugQuit) {
// if the user elects to quit the repl, throw an exception. // if the user elects to quit the repl, throw an exception.
throw Error(ErrorInfo{ throw Error(ErrorInfo{
.level = lvlInfo, .level = lvlInfo,
.msg = hintfmt("quit from debugger"), .msg = hintfmt("quit the debugger"),
.errPos = state.positions[noPos], .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 attrs = state.buildBindings(2);
auto saveDebuggerHook = debuggerHook; auto saveDebuggerHook = debuggerHook;
debuggerHook = 0; debuggerHook = nullptr;
try { try {
state.forceValue(*args[0], pos); state.forceValue(*args[0], pos);
attrs.insert(state.sValue, args[0]); attrs.insert(state.sValue, args[0]);