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cmake source #1
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cmake_minimum_required(VERSION 3.10) project(expr) add_executable(expr main.cpp)
coccinelle_for_cpp source #2
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#include <charconv> #include <stdexcept> #include <string_view> constexpr int eval(std::string_view expr) { if (expr.empty()) throw std::invalid_argument{"Invalid expression"}; int res{0}; for (const char * cur = expr.data(), * const last = expr.data() + expr.size(), * op = nullptr;;) { int arg; auto [ptr, ec] = std::from_chars(cur, last, arg); if (ec != std::errc()) throw std::invalid_argument{"Invalid operand"}; if (op) if (*op == '+') res += arg; else if (*op == '-') res -= arg; else throw std::invalid_argument{"Unsupported operation"}; else res = arg; if (ptr == last) break; op = ptr; cur = ptr + 1; if (cur == last) throw std::invalid_argument{"Invalid expression"}; } return res; } constexpr const char expr[] { #embed "expr.txt" suffix(,) 0 }; static_assert(eval(expr) == 18); int main() {}
cmake source #3
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-11+12--32+-16+1
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