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builtins.break: Return argument when debugging is not enabled

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This commit is contained in:
Eelco Dolstra 2022-05-05 12:37:43 +02:00
parent dd8b91eebc
commit 58645a78ab
1 changed files with 14 additions and 11 deletions
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13
src/libexpr/primops.cc
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@ -766,32 +766,35 @@ static RegisterPrimOp primop_break({
.args = {"v"}, .args = {"v"},
.doc = R"( .doc = R"(
In debug mode (enabled using `--debugger`), pause Nix expression evaluation and enter the REPL. In debug mode (enabled using `--debugger`), pause Nix expression evaluation and enter the REPL.
Otherwise, return the argument `v`.
)", )",
.fun = [](EvalState & state, const PosIdx pos, Value * * args, Value & v) .fun = [](EvalState & state, const PosIdx pos, Value * * args, Value & v)
{ {
if (debuggerHook && !state.debugTraces.empty()) {
PathSet context; PathSet context;
auto s = state.coerceToString(pos, *args[0], context).toOwned(); auto s = state.coerceToString(pos, *args[0], context).toOwned();
auto error = Error(ErrorInfo { auto error = Error(ErrorInfo {
.level = lvlInfo, .level = lvlInfo,
.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()) {
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 the debugger"), .msg = hintfmt("quit the debugger"),
.errPos = state.positions[noPos], .errPos = state.positions[noPos],
}); });
} }
// returning the value we were passed.
v = *args[0];
} }
// Return the value we were passed.
v = *args[0];
} }
}); });