Using GCC 13.3.0 I get warnings like the following:
```
In file included from .../ChaiScript/static_libs/../include/chaiscript/language/chaiscript_optimizer.hpp:10,
from .../ChaiScript/static_libs/../include/chaiscript/language/chaiscript_parser.hpp:26,
from .../ChaiScript/static_libs/chaiscript_parser.cpp:1:
.../ChaiScript/static_libs/../include/chaiscript/language/chaiscript_eval.hpp: In instantiation of ‘chaiscript::Boxed_Value chaiscript::eval::Global_Decl_AST_Node<T>::eval_internal(const chaiscript::detail::Dispatch_State&) const [with T = chaiscript::eval::Tracer<chaiscript::eval::Noop_Tracer_Detail>]’:
.../ChaiScript/static_libs/../include/chaiscript/language/chaiscript_eval.hpp:503:19: required from here
.../ChaiScript/static_libs/../include/chaiscript/language/chaiscript_eval.hpp:504:28: warning: possibly dangling reference to a temporary [-Wdangling-reference]
504 | const std::string &idname = [&]() -> const std::string & {
| ^~~~~~
.../ChaiScript/static_libs/../include/chaiscript/language/chaiscript_eval.hpp:510:10: note: the temporary was destroyed at the end of the full expression ‘<lambda closure object>chaiscript::eval::Global_Decl_AST_Node<chaiscript::eval::Tracer<chaiscript::eval::Noop_Tracer_Detail> >::eval_internal(const chaiscript::detail::Dispatch_State&) const::<lambda()>{((const chaiscript::eval::Global_Decl_AST_Node<chaiscript::eval::Tracer<chaiscript::eval::Noop_Tracer_Detail> >*)this)}.chaiscript::eval::Global_Decl_AST_Node<chaiscript::eval::Tracer<chaiscript::eval::Noop_Tracer_Detail> >::eval_internal(const chaiscript::detail::Dispatch_State&) const::<lambda()>()’
504 | const std::string &idname = [&]() -> const std::string & {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
505 | if (this->children[0]->identifier == AST_Node_Type::Reference) {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
506 | return this->children[0]->children[0]->text;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
507 | } else {
| ~~~~~~~~
508 | return this->children[0]->text;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
509 | }
| ~
510 | }();
| ~^~
```
Fix this by replacing the lambda with a simple ternary operator
expression.
I initially tried to use the existing .clang-format file,
but it does not match the code style (at least with clang-format 11)
and the formatting is not consistent across files.
Therefore, I decided to rewrite the .clang-format with some personal
preferences.
Used command
find . -iname "*.hpp" -o -iname "*.cpp" | xargs clang-format -i -style=file
There are two warnings when compiling with GCC 7.4.1 or clang 5.0.1.
1. warning: explicit by-copy capture of ‘this’ redundant with by-copy capture default
2. warning: typedef ... locally defined but not used [-Wunused-local-typedefs]
This change removes [2] and it compacts the lambda capture clause in [1].
This modifies no logic, it simply adds the keyword `noexcept`
I believe this is 100% correct. It calls methods that are not
guaranteed to be `noexcept`, such as `operator[]` but have
no logically way of throwing.
