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Add builtins.warn

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This commit is contained in:
Robert Hensing 2024-04-23 01:21:50 +02:00
parent d07cdbd9c2
commit 2d4c9d8f4a
4 changed files with 78 additions and 4 deletions
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37
src/libexpr/primops.cc
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@ -1043,6 +1043,43 @@ static RegisterPrimOp primop_trace({
.fun = prim_trace,
});
static void prim_warn(EvalState & state, const PosIdx pos, Value * * args, Value & v)
{
state.forceValue(*args[0], pos);
if (args[0]->type() == nString)
printMsg(lvlWarn, ANSI_WARNING "warning:" ANSI_NORMAL " %1%", args[0]->string_view());
else
printMsg(lvlWarn, ANSI_WARNING "warning:" ANSI_NORMAL " %1%", ValuePrinter(state, *args[0]));
if (evalSettings.builtinsAbortOnWarn) {
state.error<Abort>("aborting to reveal stack trace of warning, as abort-on-warn is set").debugThrow();
}
if ((evalSettings.builtinsTraceDebugger || evalSettings.builtinsDebuggerOnWarn) && state.debugRepl && !state.debugTraces.empty()) {
const DebugTrace & last = state.debugTraces.front();
state.runDebugRepl(nullptr, last.env, last.expr);
}
state.forceValue(*args[1], pos);
v = *args[1];
}
static RegisterPrimOp primop_warn({
.name = "__warn",
.args = {"e1", "e2"},
.doc = R"(
Evaluate *e1*, which must be a string and print iton standard error as a warning.
Then return *e2*.
This function is useful for non-critical situations where attention is advisable.
If the
[`debugger-on-trace`](@docroot@/command-ref/conf-file.md#conf-debugger-on-trace)
or [`debugger-on-warn`](@docroot@/command-ref/conf-file.md#conf-debugger-on-warn)
option is set to `true` and the `--debugger` flag is given, the
interactive debugger will be started when `warn` is called (like
[`break`](@docroot@/language/builtins.md#builtins-break)).
)",
.fun = prim_warn,
});
/* Takes two arguments and evaluates to the second one. Used as the
* builtins.traceVerbose implementation when --trace-verbose is not enabled