Some refactoring of Clara impl and experimental string based interface

This commit is contained in:
Phil Nash 2013-05-07 18:53:14 +01:00
parent e2f93b6507
commit 11e55161e1

View File

@ -14,51 +14,13 @@
namespace Clara {
template<typename T> struct RemoveConstRef{ typedef T type; };
template<typename T> struct RemoveConstRef<T&>{ typedef T type; };
template<typename T> struct RemoveConstRef<T const&>{ typedef T type; };
template<typename T> struct RemoveConstRef<T const>{ typedef T type; };
using namespace Catch;
class ArgData {
public:
ArgData( std::string const& _arg ) : m_weight( 2 )
{
std::size_t first = _arg.find( '<' );
std::size_t last = _arg.find_last_of( '>' );
if( first == std::string::npos || last == std::string::npos || last <= first+1 )
throw std::logic_error( "Argument must contain a name in angle brackets but it was: " + _arg );
m_prefix = _arg.substr( 0, first );
m_postfix = _arg.substr( last+1 );
m_name = _arg.substr( first+1, last-first-1 );
if( !m_prefix.empty() )
--m_weight;
if( !m_postfix.empty() )
--m_weight;
}
std::string const& name() const { return m_name; }
std::string const& prefix() const { return m_prefix; }
std::string const& postfix() const { return m_postfix; }
bool isMatch( std::string const& _arg ) const {
return startsWith( _arg, m_prefix ) && endsWith( _arg, m_postfix );
}
std::string strip( std::string const& _arg ) const {
return _arg.substr( m_prefix.size(),
_arg.size() - m_prefix.size() - m_postfix.size() );
}
bool operator < ( ArgData const& _other ) const {
return m_weight < _other.m_weight;
}
friend std::ostream& operator << ( std::ostream& os, ArgData const& _arg ) {
os << _arg.m_prefix << "<" << _arg.m_name << ">" << _arg.m_postfix;
return os;
}
protected:
std::string m_prefix;
std::string m_postfix;
std::string m_name;
int m_weight;
};
template<typename T>
bool convertInto( std::string const& _source, T& _dest ) {
std::stringstream ss;
@ -70,75 +32,88 @@ inline bool convertInto( std::string const& _source, std::string& _dest ) {
_dest = _source;
return true;
}
inline bool convertInto( std::string const& _source, bool _dest ) {
std::string sourceLC = toLower( _source );
if( sourceLC == "1" || sourceLC == "true" || sourceLC == "yes" || sourceLC == "on" )
_dest = true;
else if( sourceLC == "0" || sourceLC == "false" || sourceLC == "no" || sourceLC == "off" )
_dest = false;
else
return false;
return true;
}
template<typename T>
class Opt {
public:
Opt( std::string const& _synposis ) : m_synopsis( _synposis ) {}
Opt& shortOpt( std::string const& _value ) { m_shortOpt = _value; return *this; }
Opt& longOpt( std::string const& _value ) { m_longOpt = _value; return *this; }
Opt& shortName( std::string const& _value ) { m_shortName = _value; return *this; }
Opt& longName( std::string const& _value ) { m_longName = _value; return *this; }
template<typename M>
Opt& addArg( std::string const& _name, M const& _member ){
m_args.push_back( Arg( _name, _member ) );
Opt& optArg( std::string const& _name, M const& _member ){
m_argName = _name;
m_field = new Field<M>( _member );
return *this;
}
std::size_t takesArg() const { return !m_args.empty(); }
template<typename M>
Opt& flag( M const& _member ){
m_field = new FlagField<M>( _member );
return *this;
}
std::size_t takesArg() const { return !m_argName.empty(); }
std::string synopsis() const { return m_synopsis; }
std::string shortOpt() const { return m_shortOpt; }
std::string longOpt() const { return m_longOpt; }
std::string shortName() const { return m_shortName; }
std::string longName() const { return m_longName; }
bool parseInto( std::string const& _arg, T& _config ) const {
ensureWeightedArgsAreSorted();
typename std::vector<Arg const*>::const_iterator
it = m_argsInWeightedOrder.begin(),
itEnd = m_argsInWeightedOrder.end();
for( ; it != itEnd; ++it )
if( (*it)->isMatch( _arg ) ) {
(*it)->parseInto( _arg, _config );
return true;
}
return false;
if( m_argName.empty() )
m_field->set( _config );
else if( !m_field->parseInto( _arg, _config ) )
throw std::domain_error( "'" + _arg + "' was not valid for <" + m_argName + ">" );
return true;
}
std::string usage() const {
std::ostringstream oss;
oss << *this;
writeToStream( oss );
return oss.str();
}
friend std::ostream& operator << ( std::ostream& os, Opt const& _opt ) {
if( !_opt.m_shortOpt.empty() )
os << "-" << _opt.m_shortOpt;
if( !_opt.m_longOpt.empty() )
os << ", ";
if( !_opt.m_longOpt.empty() )
os << "--" << _opt.m_longOpt;
if( !_opt.m_args.empty() ) {
os << " ";
typename std::vector<Arg>::const_iterator
it = _opt.m_args.begin(),
itEnd = _opt.m_args.end();
while( it != itEnd ) {
os << static_cast<ArgData const&>( *it );
if( ++it!=itEnd )
os << "|";
}
}
_opt.writeToStream( os );
return os;
}
void writeToStream ( std::ostream& os ) const {
if( !m_shortName.empty() )
os << "-" << m_shortName;
if( !m_longName.empty() )
os << ", ";
if( !m_longName.empty() )
os << "--" << m_longName;
if( takesArg() )
os << " <" << m_argName << ">";
}
private:
struct IField : SharedImpl<> {
virtual ~IField() {}
virtual bool parseInto( std::string const& _arg, T& _config ) const = 0;
virtual bool parseInto( std::string const&, T& ) const {
throw std::logic_error( "cannot pass argument to bool binder" );
}
virtual void set( T& ) const {
throw std::logic_error( "field requires an argument" );
}
};
template<typename F>
struct Field;
template<typename F>
struct FlagField;
// Data member : with argument
template<typename C, typename M>
struct Field<M C::*> : IField {
Field( M C::* _member ) : member( _member ) {}
@ -147,11 +122,22 @@ private:
}
M C::* member;
};
// Data member : flag
template<typename C, typename M>
struct FlagField<M C::*> : IField {
FlagField( M C::* _member ) : member( _member ) {}
void set( T& _config ) const {
_config.*member = true;
}
M C::* member;
};
// Unary method : with argument
template<typename C, typename M>
struct Field<void (C::*)( M )> : IField {
Field( void (C::*_method)( M ) ) : method( _method ) {}
bool parseInto( std::string const& _arg, T& _config ) const {
M value;
typename RemoveConstRef<M>::type value;
if( !convertInto( _arg, value ) )
return false;
( _config.*method )( value );
@ -160,41 +146,31 @@ private:
void (C::*method)( M );
};
class Arg : public ArgData {
public:
Arg() : m_field( NULL ) {}
template<typename M>
Arg( std::string const& _name, M const& _member )
: ArgData( _name ),
m_field( new Field<M>( _member ) )
{}
void parseInto( std::string const& _arg, T& _config ) const {
if( !m_field->parseInto( strip( _arg ), _config ) )
throw std::domain_error( "'" + _arg + "' was not valid for <" + m_name + ">" );
// Unary method : flag
template<typename C, typename M>
struct FlagField<void (C::*)( M )> : IField {
FlagField( void (C::*_method)( M ) ) : method( _method ) {}
void set( T& _config ) const {
( _config.*method )( true );
}
private:
Ptr<IField> m_field;
void (C::*method)( M );
};
static bool argLess( Arg const* lhs, Arg const* rhs ) {
return *lhs < *rhs;
}
void ensureWeightedArgsAreSorted() const {
if( m_args.size() > m_argsInWeightedOrder.size() ) {
m_argsInWeightedOrder.clear();
typename std::vector<Arg>::const_iterator it = m_args.begin(),
itEnd = m_args.end();
for( ; it != itEnd; ++it )
m_argsInWeightedOrder.push_back( &*it );
sort( m_argsInWeightedOrder.begin(), m_argsInWeightedOrder.end(), &Opt::argLess );
// Nullary method : flag
template<typename C>
struct FlagField<void (C::*)()> : IField {
FlagField( void (C::*_method)() ) : method( _method ) {}
void set( T& _config ) const {
( _config.*method )();
}
}
void (C::*method)();
};
std::string m_synopsis;
std::string m_shortOpt;
std::string m_longOpt;
std::vector<Arg> m_args;
mutable std::vector<Arg const*> m_argsInWeightedOrder;
std::string m_shortName;
std::string m_longName;
std::string m_argName;
Ptr<IField> m_field;
};
template<typename T>
@ -205,27 +181,34 @@ public:
: m_separatorChars( "=: " ),
m_allowSpaceSeparator( m_separatorChars.find( ' ' ) != std::string::npos )
{}
template<typename M>
Parser( std::string const&, M ) // !TBD
: m_separatorChars( "=: " ),
m_allowSpaceSeparator( m_separatorChars.find( ' ' ) != std::string::npos )
{}
template<typename M>
Parser& operator()( std::string const&, M ) { return *this; } // !TBD
Opt<T>& addOption( std::string const& _synposis ) {
m_allOptionParsers.push_back( _synposis );
return m_allOptionParsers.back();
}
void parseArgs( int argc, const char* const argv[], T& _config ) {
void parseInto( int argc, const char* const argv[], T& _config ) {
std::vector<std::string> args;
args.reserve( static_cast<std::size_t>( argc ) );
for( int i = 0; i < argc; ++i )
args.push_back( argv[i] );
parseArgs( args, _config );
parseInto( args, _config );
}
template<typename U>
void parseRemainingArgs( Parser<U>& _parser, T& _config ) {
parseArgs( _parser.m_unusedOpts, _config );
parseInto( _parser.m_unusedOpts, _config );
}
void parseArgs( std::vector<std::string> const& _args, T& _config ) {
void parseInto( std::vector<std::string> const& _args, T& _config ) {
ensureOptions();
for( std::size_t i = 0; i < _args.size(); ++i ) {
std::string const& arg = _args[i];
@ -297,10 +280,10 @@ private:
m_optionsByName.clear();
typename std::vector<Opt<T> >::const_iterator it, itEnd = m_allOptionParsers.end();
for( it = m_allOptionParsers.begin(); it != itEnd; ++it ) {
if( !it->shortOpt().empty() )
m_optionsByName.insert( std::make_pair( "-" + it->shortOpt(), &*it ) );
if( !it->longOpt().empty() )
m_optionsByName.insert( std::make_pair( "--" + it->longOpt(), &*it ) );
if( !it->shortName().empty() )
m_optionsByName.insert( std::make_pair( "-" + it->shortName(), &*it ) );
if( !it->longName().empty() )
m_optionsByName.insert( std::make_pair( "--" + it->longName(), &*it ) );
}
}
}
@ -319,12 +302,12 @@ private:
} // end namespace Catch
struct TestOpt {
TestOpt() : number( 0 ), index( 0 ) {}
TestOpt() : number( 0 ), index( 0 ), flag( false ) {}
std::string fileName;
std::string streamName;
int number;
int index;
bool flag;
void setValidIndex( int i ) {
if( i < 0 || i > 10 )
@ -337,120 +320,54 @@ struct TestOpt2 {
std::string description;
};
TEST_CASE( "Arg" ) {
SECTION( "pre and post" ) {
Clara::ArgData preAndPost( "prefix<arg>postfix" );
CHECK( preAndPost.prefix() == "prefix" );
CHECK( preAndPost.postfix() == "postfix" );
CHECK( preAndPost.name() == "arg" );
CHECK( preAndPost.isMatch( "prefixpayloadpostfix" ) );
CHECK( preAndPost.strip( "prefixpayloadpostfix" ) == "payload" );
CHECK_FALSE( preAndPost.isMatch( "payload" ) );
CHECK_FALSE( preAndPost.isMatch( "postfixpayloadpostfix" ) );
CHECK_FALSE( preAndPost.isMatch( "prefixpayloadpostfixx" ) );
}
SECTION( "pre" ) {
Clara::ArgData preAndPost( "prefix<arg>" );
CHECK( preAndPost.prefix() == "prefix" );
CHECK( preAndPost.postfix() == "" );
CHECK( preAndPost.name() == "arg" );
CHECK( preAndPost.isMatch( "prefixpayload" ) );
CHECK( preAndPost.strip( "prefixpayload" ) == "payload" );
CHECK_FALSE( preAndPost.isMatch( "payload" ) );
CHECK_FALSE( preAndPost.isMatch( "postfixpayload" ) );
}
SECTION( "post" ) {
Clara::ArgData preAndPost( "<arg>postfix" );
CHECK( preAndPost.prefix() == "" );
CHECK( preAndPost.postfix() == "postfix" );
CHECK( preAndPost.name() == "arg" );
CHECK( preAndPost.isMatch( "payloadpostfix" ) );
CHECK( preAndPost.strip( "payloadpostfix" ) == "payload" );
CHECK_FALSE( preAndPost.isMatch( "payload" ) );
CHECK_FALSE( preAndPost.isMatch( "payloadpostfixx" ) );
}
SECTION( "none" ) {
Clara::ArgData preAndPost( "<arg>" );
CHECK( preAndPost.prefix() == "" );
CHECK( preAndPost.postfix() == "" );
CHECK( preAndPost.name() == "arg" );
CHECK( preAndPost.isMatch( "payload" ) );
CHECK( preAndPost.strip( "payload" ) == "payload" );
}
SECTION( "errors" ) {
CHECK_THROWS( Clara::ArgData( "" ) );
CHECK_THROWS( Clara::ArgData( "no brackets" ) );
CHECK_THROWS( Clara::ArgData( "<one bracket" ) );
CHECK_THROWS( Clara::ArgData( "one bracket>" ) );
CHECK_THROWS( Clara::ArgData( "><" ) );
CHECK_THROWS( Clara::ArgData( "<>" ) );
}
}
TEST_CASE( "cmdline", "" ) {
TestOpt config;
Clara::Parser<TestOpt> parser;
parser.addOption( "specifies output file" )
.shortOpt( "o" )
.longOpt( "output" )
.addArg( "<filename>", &TestOpt::fileName )
.addArg( "%<stream name>", &TestOpt::streamName );
.shortName( "o" )
.longName( "output" )
.optArg( "<filename>", &TestOpt::fileName );
SECTION( "plain filename" ) {
const char* argv[] = { "test", "-o filename.ext" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config );
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
CHECK( config.fileName == "filename.ext" );
CHECK( config.streamName == "" );
}
SECTION( "plain filename with colon" ) {
const char* argv[] = { "test", "-o:filename.ext" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config );
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
CHECK( config.fileName == "filename.ext" );
CHECK( config.streamName == "" );
}
SECTION( "plain filename with =" ) {
const char* argv[] = { "test", "-o=filename.ext" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config );
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
CHECK( config.fileName == "filename.ext" );
CHECK( config.streamName == "" );
}
SECTION( "stream name" ) {
const char* argv[] = { "test", "-o %stdout" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config );
CHECK( config.fileName == "" );
CHECK( config.streamName == "stdout" );
}
SECTION( "long opt" ) {
const char* argv[] = { "test", "--output %stdout" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config );
CHECK( config.fileName == "" );
CHECK( config.streamName == "stdout" );
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
CHECK( config.fileName == "%stdout" );
}
parser.addOption( "a number" )
.shortOpt( "n" )
.addArg( "<an integral value>", &TestOpt::number );
.shortName( "n" )
.optArg( "<an integral value>", &TestOpt::number );
SECTION( "a number" ) {
const char* argv[] = { "test", "-n 42" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config );
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
CHECK( config.number == 42 );
}
SECTION( "not a number" ) {
const char* argv[] = { "test", "-n forty-two" };
CHECK_THROWS( parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config ) );
CHECK_THROWS( parser.parseInto( sizeof(argv)/sizeof(char*), argv, config ) );
CHECK( config.number == 0 );
}
@ -461,13 +378,13 @@ TEST_CASE( "cmdline", "" ) {
Clara::Parser<TestOpt2> parser2;
parser2.addOption( "description" )
.shortOpt( "d" )
.longOpt( "description" )
.addArg( "<some text>", &TestOpt2::description );
.shortName( "d" )
.longName( "description" )
.optArg( "<some text>", &TestOpt2::description );
const char* argv[] = { "test", "-n 42", "-d some text" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config1 );
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config1 );
CHECK( config1.number == 42 );
parser2.parseRemainingArgs( parser, config2 );
@ -477,22 +394,134 @@ TEST_CASE( "cmdline", "" ) {
SECTION( "methods" ) {
parser.addOption( "An index, which is an integer between 0 and 10, inclusive" )
.shortOpt( "i" )
.addArg( "<index>", &TestOpt::setValidIndex );
.shortName( "i" )
.optArg( "<index>", &TestOpt::setValidIndex );
SECTION( "in range" ) {
const char* argv[] = { "test", "-i 3" };
parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config );
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
REQUIRE( config.index == 3 );
}
SECTION( "out of range" ) {
const char* argv[] = { "test", "-i 42" };
REQUIRE_THROWS( parser.parseArgs( sizeof(argv)/sizeof(char*), argv, config ) );
REQUIRE_THROWS( parser.parseInto( sizeof(argv)/sizeof(char*), argv, config ) );
}
std::cout << parser << std::endl;
}
SECTION( "flags" ) {
parser.addOption( "A flag" )
.shortName( "f" )
.flag( &TestOpt::flag );
SECTION( "set" ) {
const char* argv[] = { "test", "-f" };
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
REQUIRE( config.flag );
}
SECTION( "not set" ) {
const char* argv[] = { "test" };
parser.parseInto( sizeof(argv)/sizeof(char*), argv, config );
REQUIRE( config.flag == false );
}
}
}
struct Config {
bool listTests;
bool listTags;
bool showPassingTests;
bool breakIntoDebugger;
bool noThrow;
bool showHelp;
int abortAfter;
std::string reporterName;
std::string fileName;
std::string suiteName;
std::vector<std::string> warnings;
void abortAfterFirst() { abortAfter = 1; }
void abortAfterX( int x ) { abortAfter = x; }
void addWarning( std::string const& _warning ) { warnings.push_back( _warning ); }
};
TEST_CASE( "growing new Catch cli" ) {
Clara::Parser<Config> parser;
Clara::Parser<Config>
( "-h, --help display usage information", &Config::showHelp )
( "-l, --list list all (or matching) test cases", &Config::listTests )
( "-t, --tags list all (or matching) tags", &Config::listTags )
( "-p, --passing show passing test output", &Config::showPassingTests )
( "-b, --break break into debugger on failure", &Config::breakIntoDebugger )
( "-e, --nothrow Skip exception tests", &Config::noThrow )
( "-o, --out <file name> output filename", &Config::fileName )
( "-n, --name <name> suite name", &Config::suiteName )
( "-a, --abort abort at first failure", &Config::abortAfterFirst )
( "-x, --abortx <number of failures> abort after x failures", &Config::abortAfterX )
( "-w, --warn <warning name> enables warnings", &Config::addWarning );
// .parseInto( argc, argv, config );
parser.addOption( "display usage information" )
.shortName( "?")
.shortName( "h")
.longName( "help" )
.flag( &Config::showHelp );
parser.addOption( "list all (or matching) test cases" )
.shortName( "l")
.longName( "list" )
.flag( &Config::listTests );
parser.addOption( "list all (or matching) tags" )
.shortName( "t")
.longName( "tags" )
.flag( &Config::listTags );
parser.addOption( "show passing test output" )
.shortName( "p")
.longName( "passing" )
.flag( &Config::showPassingTests );
parser.addOption( "break into debugger on failure" )
.shortName( "b")
.longName( "break" )
.flag( &Config::breakIntoDebugger );
parser.addOption( "Skip exception tests" )
.shortName( "e")
.longName( "nothrow" )
.flag( &Config::noThrow );
parser.addOption( "output filename" )
.shortName( "o")
.longName( "out" )
.optArg( "<file name>", &Config::fileName );
parser.addOption( "suite name" )
.shortName( "n")
.longName( "name" )
.optArg( "<name>", &Config::suiteName );
parser.addOption( "abort at first failure" )
.shortName( "a")
.longName( "abort" )
.flag( &Config::abortAfterFirst );
parser.addOption( "abort after x failures" )
.shortName( "x")
.longName( "abortx" )
.optArg( "<number of failures>", &Config::abortAfterX );
parser.addOption( "enables warnings" )
.shortName( "w")
.longName( "warn" )
.optArg( "<warning name>", &Config::addWarning );
std::cout << parser << std::endl;
}