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https://github.com/ChaiScript/ChaiScript.git
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b7315f2db9
Register std::string_view as the "string_view" user type with a built-in implicit conversion from std::string, so a ChaiScript string can be passed directly to a C++ function taking std::string_view. Adds the reverse explicit conversion via string(sv) / to_string(sv), plus basic queries (size, length, empty, data) and comparison operators on string_view. String-style methods that take size_t (substr, find, ...) are intentionally not duplicated on string_view: with the implicit conversion in place they would create dispatch ambiguity for calls like string.substr(int, int). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
84 lines
2.8 KiB
C++
84 lines
2.8 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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// and Jason Turner (jason@emptycrate.com)
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// http://www.chaiscript.com
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#ifndef CHAISCRIPT_STDLIB_HPP_
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#define CHAISCRIPT_STDLIB_HPP_
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#include <map>
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#include <memory>
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#include <string>
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#include <string_view>
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#include <utility>
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#include <vector>
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#include "chaiscript_defines.hpp"
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#include "language/chaiscript_common.hpp"
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#include "dispatchkit/function_call.hpp"
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// #include "dispatchkit/dispatchkit.hpp"
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#include "dispatchkit/bootstrap.hpp"
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#include "dispatchkit/bootstrap_stl.hpp"
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#include "dispatchkit/operators.hpp"
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// #include "dispatchkit/boxed_value.hpp"
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#include "dispatchkit/register_function.hpp"
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#include "language/chaiscript_prelude.hpp"
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#include "utility/json_wrap.hpp"
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#ifndef CHAISCRIPT_NO_THREADS
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#include <future>
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#endif
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/// @file
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///
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/// This file generates the standard library that normal ChaiScript usage requires.
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namespace chaiscript {
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class Std_Lib {
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public:
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[[nodiscard]] static ModulePtr library(const std::vector<Library_Options> &t_opts = {}) {
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if (std::find(t_opts.begin(), t_opts.end(), Library_Options::No_Stdlib) != t_opts.end()) {
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return std::make_shared<Module>();
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}
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auto lib = std::make_shared<Module>();
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const bool no_prelude = std::find(t_opts.begin(), t_opts.end(), Library_Options::No_Prelude) != t_opts.end();
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const bool no_json = std::find(t_opts.begin(), t_opts.end(), Library_Options::No_JSON) != t_opts.end();
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bootstrap::Bootstrap::bootstrap(*lib);
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bootstrap::standard_library::vector_type<std::vector<Boxed_Value>>("Vector", *lib);
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bootstrap::standard_library::string_type<std::string>("string", *lib);
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bootstrap::standard_library::string_view_type<std::string_view, std::string>("string_view", *lib);
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bootstrap::standard_library::map_type<std::map<std::string, Boxed_Value>>("Map", *lib);
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bootstrap::standard_library::pair_type<std::pair<Boxed_Value, Boxed_Value>>("Pair", *lib);
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// Allow explicit conversion from std::string_view back to std::string,
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// e.g. `string(sv)` in ChaiScript.
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lib->add(fun([](const std::string_view sv) { return std::string{sv}; }), "string");
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#ifndef CHAISCRIPT_NO_THREADS
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bootstrap::standard_library::future_type<std::future<chaiscript::Boxed_Value>>("future", *lib);
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// Note: async() is registered in ChaiScript_Basic::build_eval_system()
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// with thread tracking to prevent heap-use-after-free on engine destruction.
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#endif
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if (!no_json) {
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json_wrap::library(*lib);
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}
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if (!no_prelude) {
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lib->eval(ChaiScript_Prelude::chaiscript_prelude() /*, "standard prelude"*/);
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}
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return lib;
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}
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};
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} // namespace chaiscript
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#endif
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