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Generate random rng seed if user did not specify one

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Closes #2161
This commit is contained in:
Martin Hořeňovský 2021-10-06 00:00:46 +02:00
parent 4e6d306742
commit fce42b62ad
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GPG key ID: DE48307B8B0D381A
4 changed files with 34 additions and 6 deletions
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28
src/catch2/internal/catch_commandline.cpp
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@ -7,6 +7,7 @@
// SPDX-License-Identifier: BSL-1.0
#include <catch2/internal/catch_commandline.hpp>
#include <catch2/internal/catch_compiler_capabilities.hpp>
#include <catch2/catch_config.hpp>
#include <catch2/internal/catch_string_manip.hpp>
#include <catch2/interfaces/catch_interfaces_registry_hub.hpp>
@ -15,6 +16,7 @@
#include <fstream>
#include <ctime>
#include <string>
namespace Catch {
@ -71,10 +73,28 @@ namespace Catch {
return ParserResult::ok( ParseResultType::Matched );
};
auto const setRngSeed = [&]( std::string const& seed ) {
if( seed != "time" )
return Clara::Detail::convertInto( seed, config.rngSeed );
config.rngSeed = static_cast<unsigned int>( std::time(nullptr) );
return ParserResult::ok( ParseResultType::Matched );
if( seed == "time" ) {
config.rngSeed = static_cast<unsigned int>(std::time(nullptr));
return ParserResult::ok(ParseResultType::Matched);
}
CATCH_TRY {
std::size_t parsedTo = 0;
unsigned long parsedSeed = std::stoul(seed, &parsedTo, 0);
if (parsedTo != seed.size()) {
return ParserResult::runtimeError("Could not parse '" + seed + "' as seed");
}
// TODO: Ideally we could parse unsigned int directly,
// but the stdlib doesn't provide helper for that
// type. After this is refactored to use fixed size
// type, we should check the parsed value is in range
// of the underlying type.
config.rngSeed = static_cast<unsigned int>(parsedSeed);
return ParserResult::ok(ParseResultType::Matched);
} CATCH_CATCH_ANON(std::exception const&) {
return ParserResult::runtimeError("Could not parse '" + seed + "' as seed");
}
};
auto const setColourUsage = [&]( std::string const& useColour ) {
auto mode = toLower( useColour );