03803ee4c4
This will allow the user to add hooks in for debugging / execution tracing / throttling / etc for each node execution The cost is *almost* 0 if no tracing is enabled.
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
// This file is distributed under the BSD License.
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// See "license.txt" for details.
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// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
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// Copyright 2009-2016, Jason Turner (jason@emptycrate.com)
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// http://www.chaiscript.com
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#ifndef CHAISCRIPT_TRACER_HPP_
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#define CHAISCRIPT_TRACER_HPP_
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namespace chaiscript {
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namespace eval {
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struct Noop_Tracer
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{
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template<typename T>
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static void trace(const chaiscript::detail::Dispatch_State &, const AST_Node_Impl<T> *)
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{
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}
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};
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template<typename ... T>
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struct Tracer : T...
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{
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Tracer() = default;
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Tracer(T ... t)
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: T(std::move(t))...
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{
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}
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void do_trace(const chaiscript::detail::Dispatch_State &ds, const AST_Node_Impl<Tracer<T...>> *node) {
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(void)std::initializer_list<int>{ (T::trace(ds, node), 0)... };
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}
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static void trace(const chaiscript::detail::Dispatch_State &ds, const AST_Node_Impl<Tracer<T...>> *node) {
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ds->get_parser().get_tracer<Tracer<T...>>().do_trace(ds, node);
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}
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};
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}
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}
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#endif
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