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Make operators noexcept (removing std::vector usage)

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This commit is contained in:
Jason Turner 2017-08-10 19:52:32 -06:00
parent 5d56051532
commit 5ba155e058
1 changed files with 61 additions and 17 deletions
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78
include/chaiscript/language/chaiscript_parser.hpp
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@ -192,23 +192,67 @@ namespace chaiscript
}
static const std::vector<std::vector<utility::Static_String>> &create_operator_matches() {
static const std::vector<std::vector<utility::Static_String>> operator_matches {
{"?"},
{"||"},
{"&&"},
{"|"},
{"^"},
{"&"},
{"==", "!="},
{"<", "<=", ">", ">="},
{"<<", ">>"},
//We share precedence here but then separate them later
{"+", "-"},
{"*", "/", "%"},
{"++", "--", "-", "+", "!", "~"}
struct Operator_Matches
{
struct Array_View
{
template<std::size_t Len>
Array_View(const std::array<utility::Static_String, Len> &data) noexcept
: m_begin(&(*std::begin(data))),
m_end(&(*std::end(data)))
{
}
auto begin() const noexcept
{
return m_begin;
}
auto end() const noexcept
{
return m_end;
}
const utility::Static_String *m_begin;
const utility::Static_String *m_end;
};
const std::array<utility::Static_String, 1> m_0 {{"?"}};
const std::array<utility::Static_String, 1> m_1 {{"||"}};
const std::array<utility::Static_String, 1> m_2 {{"&&"}};
const std::array<utility::Static_String, 1> m_3 {{"|"}};
const std::array<utility::Static_String, 1> m_4 {{"^"}};
const std::array<utility::Static_String, 1> m_5 {{"&"}};
const std::array<utility::Static_String, 2> m_6 {{"==", "!="}};
const std::array<utility::Static_String, 4> m_7 {{"<", "<=", ">", ">="}};
const std::array<utility::Static_String, 2> m_8 {{"<<", ">>"}};
//We share precedence here but then separate them later
const std::array<utility::Static_String, 2> m_9 {{"+", "-"}};
const std::array<utility::Static_String, 3> m_10 {{"*", "/", "%"}};
const std::array<utility::Static_String, 6> m_11 {{"++", "--", "-", "+", "!", "~"}};
const std::array<Array_View, 12> all_data {{
m_0, m_1, m_2, m_3, m_4, m_5, m_6, m_7, m_8, m_9, m_10, m_11
}};
auto begin() const noexcept
{
return all_data.begin();
}
auto end() const noexcept
{
return all_data.end();
}
decltype(auto) operator[](const std::size_t pos) const noexcept {
return (all_data[pos]);
}
};
static const auto &create_operator_matches() noexcept {
const static Operator_Matches operator_matches;
return operator_matches;
}
@ -262,7 +306,7 @@ namespace chaiscript
}
const std::array<std::array<bool, detail::lengthof_alphabet>, detail::max_alphabet> &m_alphabet = create_alphabet();
const std::vector<std::vector<utility::Static_String>> &m_operator_matches = create_operator_matches();
const Operator_Matches &m_operator_matches = create_operator_matches();
const std::array<Operator_Precidence, 12> &m_operators = create_operators();
std::shared_ptr<std::string> m_filename;
@ -1392,7 +1436,7 @@ namespace chaiscript
bool is_operator(const std::string &t_s) const {
return std::any_of(m_operator_matches.begin(), m_operator_matches.end(),
[t_s](const std::vector<utility::Static_String> &opers) {
[t_s](const auto &opers) {
return std::any_of(opers.begin(), opers.end(),
[t_s](const utility::Static_String &s) {
return t_s == s.c_str();