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https://github.com/ChaiScript/ChaiScript.git
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6517bb38a7
The custom parse_num floating-point implementation produced slightly different results from the C++ compiler's own literal parsing (e.g. 1.1e-4 was off by a few ULPs). Replace it with std::from_chars which is locale-independent and matches compiler precision exactly. Also migrate integer parsing in buildInt from std::stoll/stoull to std::from_chars, fix the JSON number parser to pass the full numeric string to from_chars instead of splitting mantissa/exponent and using std::pow, and update parse_string to use from_chars for arithmetic types. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
#include "../static_libs/chaiscript_parser.hpp"
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#include "../static_libs/chaiscript_stdlib.hpp"
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#include <chaiscript/chaiscript_basic.hpp>
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#include <cmath>
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#include <iomanip>
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#include <iostream>
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#include <string>
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#define TEST_FLOAT_LITERAL(v) test_float_literal(v, #v)
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template<typename T>
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bool test_float_literal(const T val, const std::string &str) {
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chaiscript::ChaiScript_Basic chai(create_chaiscript_stdlib(), create_chaiscript_parser());
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const T val2 = chai.eval<T>(str);
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const bool pass = (val == val2);
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std::cout << (pass ? "PASS" : "FAIL") << " (" << str << ") C++="
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<< std::setprecision(20) << val << " chai=" << val2 << "\n";
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return pass;
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}
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int main() {
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bool success = true;
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// Issue #378: scientific notation parsing inaccuracies
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success = TEST_FLOAT_LITERAL(1.1e-4) && success;
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success = TEST_FLOAT_LITERAL(1.5e+3) && success;
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success = TEST_FLOAT_LITERAL(3.14159) && success;
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success = TEST_FLOAT_LITERAL(2.718281828459045) && success;
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success = TEST_FLOAT_LITERAL(1.0e10) && success;
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success = TEST_FLOAT_LITERAL(1.0e-10) && success;
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success = TEST_FLOAT_LITERAL(0.1) && success;
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success = TEST_FLOAT_LITERAL(0.2) && success;
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success = TEST_FLOAT_LITERAL(1.7976931348623157e+308) && success;
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success = TEST_FLOAT_LITERAL(2.2250738585072014e-308) && success;
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// Float suffix
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success = TEST_FLOAT_LITERAL(1.1e-4f) && success;
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success = TEST_FLOAT_LITERAL(3.14f) && success;
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// Long double suffix
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success = TEST_FLOAT_LITERAL(1.1e-4l) && success;
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success = TEST_FLOAT_LITERAL(3.14l) && success;
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if (success) {
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std::cout << "All float literal tests passed.\n";
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return 0;
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} else {
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std::cout << "FLOAT LITERAL TEST FAILURE\n";
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return 1;
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}
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}
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