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Fix #421: Switch with type_conversion compares destroyed objects

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Add Function_Push_Pop to Switch_AST_Node case comparison to properly
manage the lifetime of temporaries created during type conversions.

Make Binary_Operator_AST_Node::do_oper static and public so it can be
reused by Switch_AST_Node for case equality checks, ensuring consistent
lifetime management across all operator invocations.

Original-PR: #422
Co-Authored-By: dinghram <don.inghram@gmail.com>
This commit is contained in:
dinghram 2026-04-10 18:18:17 -06:00 committed by leftibot
parent da0322a8a2
commit 78d2de0ccf
1 changed files with 7 additions and 7 deletions
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14
include/chaiscript/language/chaiscript_eval.hpp
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@ -220,15 +220,16 @@ namespace chaiscript {
Boxed_Value eval_internal(const chaiscript::detail::Dispatch_State &t_ss) const override {
auto lhs = this->children[0]->eval(t_ss);
auto rhs = this->children[1]->eval(t_ss);
return do_oper(t_ss, m_oper, this->text, lhs, rhs);
return do_oper(t_ss, m_oper, this->text, lhs, rhs, m_loc);
}
protected:
Boxed_Value do_oper(const chaiscript::detail::Dispatch_State &t_ss,
// static and public so we can use this to process Switch_AST_Node case equality
static Boxed_Value do_oper(const chaiscript::detail::Dispatch_State &t_ss,
Operators::Opers t_oper,
const std::string &t_oper_string,
const Boxed_Value &t_lhs,
const Boxed_Value &t_rhs) const {
const Boxed_Value &t_rhs,
std::atomic_uint_fast32_t &t_loc) {
try {
if (t_oper != Operators::Opers::invalid && t_lhs.get_type_info().is_arithmetic() && t_rhs.get_type_info().is_arithmetic()) {
// If it's an arithmetic operation we want to short circuit dispatch
@ -243,7 +244,7 @@ namespace chaiscript {
chaiscript::eval::detail::Function_Push_Pop fpp(t_ss);
std::array<Boxed_Value, 2> params{t_lhs, t_rhs};
fpp.save_params(Function_Params(params));
return t_ss->call_function(t_oper_string, m_loc, Function_Params(params), t_ss.conversions());
return t_ss->call_function(t_oper_string, t_loc, Function_Params(params), t_ss.conversions());
}
} catch (const exception::dispatch_error &e) {
throw exception::eval_error("Can not find appropriate '" + t_oper_string + "' operator.", e.parameters, e.functions, false, *t_ss);
@ -985,8 +986,7 @@ namespace chaiscript {
if (this->children[currentCase]->identifier == AST_Node_Type::Case) {
// This is a little odd, but because want to see both the switch and the case simultaneously, I do a downcast here.
try {
std::array<Boxed_Value, 2> p{match_value, this->children[currentCase]->children[0]->eval(t_ss)};
if (hasMatched || boxed_cast<bool>(t_ss->call_function("==", m_loc, Function_Params{p}, t_ss.conversions()))) {
if (hasMatched || boxed_cast<bool>(Binary_Operator_AST_Node<T>::do_oper(t_ss, Operators::Opers::equals, "==", match_value, this->children[currentCase]->children[0]->eval(t_ss), m_loc))) {
this->children[currentCase]->eval(t_ss);
hasMatched = true;
}