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catch2/include/external/clara.h
Phil Nash 1c47fe023a Updated embedded Clara to 0.0.2.3 
- has all new, more robust, token parsing.
- eliminates issue with unreachable code
- allows use of forward slashes to introduce short args on Windows
2016-04-23 13:21:29 +01:00

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/*
* Created by Phil on 25/05/2013.
* Copyright 2013 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
// Version 0.0.2.3
// Only use header guard if we are not using an outer namespace
#if !defined(TWOBLUECUBES_CLARA_H_INCLUDED) || defined(STITCH_CLARA_OPEN_NAMESPACE)
#ifndef STITCH_CLARA_OPEN_NAMESPACE
#define TWOBLUECUBES_CLARA_H_INCLUDED
#define STITCH_CLARA_OPEN_NAMESPACE
#define STITCH_CLARA_CLOSE_NAMESPACE
#else
#define STITCH_CLARA_CLOSE_NAMESPACE }
#endif
#define STITCH_TBC_TEXT_FORMAT_OPEN_NAMESPACE STITCH_CLARA_OPEN_NAMESPACE
// ----------- #included from tbc_text_format.h -----------
/*
* Created by Phil on 18/4/2013.
* Copyright 2013 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
// Only use header guard if we are not using an outer namespace
#if !defined(TBC_TEXT_FORMAT_H_INCLUDED) || defined(STITCH_TBC_TEXT_FORMAT_OUTER_NAMESPACE)
#ifndef STITCH_TBC_TEXT_FORMAT_OUTER_NAMESPACE
#define TBC_TEXT_FORMAT_H_INCLUDED
#endif
#include <string>
#include <vector>
#include <sstream>
#include <algorithm>
// Use optional outer namespace
#ifdef STITCH_TBC_TEXT_FORMAT_OUTER_NAMESPACE
namespace STITCH_TBC_TEXT_FORMAT_OUTER_NAMESPACE {
#endif
namespace Tbc {
#ifdef TBC_TEXT_FORMAT_CONSOLE_WIDTH
const unsigned int consoleWidth = TBC_TEXT_FORMAT_CONSOLE_WIDTH;
#else
const unsigned int consoleWidth = 80;
#endif
struct TextAttributes {
TextAttributes()
: initialIndent( std::string::npos ),
indent( 0 ),
width( consoleWidth-1 ),
tabChar( '\t' )
{}
TextAttributes& setInitialIndent( std::size_t _value ) { initialIndent = _value; return *this; }
TextAttributes& setIndent( std::size_t _value ) { indent = _value; return *this; }
TextAttributes& setWidth( std::size_t _value ) { width = _value; return *this; }
TextAttributes& setTabChar( char _value ) { tabChar = _value; return *this; }
std::size_t initialIndent; // indent of first line, or npos
std::size_t indent; // indent of subsequent lines, or all if initialIndent is npos
std::size_t width; // maximum width of text, including indent. Longer text will wrap
char tabChar; // If this char is seen the indent is changed to current pos
};
class Text {
public:
Text( std::string const& _str, TextAttributes const& _attr = TextAttributes() )
: attr( _attr )
{
std::string wrappableChars = " [({.,/|\\-";
std::size_t indent = _attr.initialIndent != std::string::npos
? _attr.initialIndent
: _attr.indent;
std::string remainder = _str;
while( !remainder.empty() ) {
if( lines.size() >= 1000 ) {
lines.push_back( "... message truncated due to excessive size" );
return;
}
std::size_t tabPos = std::string::npos;
std::size_t width = (std::min)( remainder.size(), _attr.width - indent );
std::size_t pos = remainder.find_first_of( '\n' );
if( pos <= width ) {
width = pos;
}
pos = remainder.find_last_of( _attr.tabChar, width );
if( pos != std::string::npos ) {
tabPos = pos;
if( remainder[width] == '\n' )
width--;
remainder = remainder.substr( 0, tabPos ) + remainder.substr( tabPos+1 );
}
if( width == remainder.size() ) {
spliceLine( indent, remainder, width );
}
else if( remainder[width] == '\n' ) {
spliceLine( indent, remainder, width );
if( width <= 1 || remainder.size() != 1 )
remainder = remainder.substr( 1 );
indent = _attr.indent;
}
else {
pos = remainder.find_last_of( wrappableChars, width );
if( pos != std::string::npos && pos > 0 ) {
spliceLine( indent, remainder, pos );
if( remainder[0] == ' ' )
remainder = remainder.substr( 1 );
}
else {
spliceLine( indent, remainder, width-1 );
lines.back() += "-";
}
if( lines.size() == 1 )
indent = _attr.indent;
if( tabPos != std::string::npos )
indent += tabPos;
}
}
}
void spliceLine( std::size_t _indent, std::string& _remainder, std::size_t _pos ) {
lines.push_back( std::string( _indent, ' ' ) + _remainder.substr( 0, _pos ) );
_remainder = _remainder.substr( _pos );
}
typedef std::vector<std::string>::const_iterator const_iterator;
const_iterator begin() const { return lines.begin(); }
const_iterator end() const { return lines.end(); }
std::string const& last() const { return lines.back(); }
std::size_t size() const { return lines.size(); }
std::string const& operator[]( std::size_t _index ) const { return lines[_index]; }
std::string toString() const {
std::ostringstream oss;
oss << *this;
return oss.str();
}
inline friend std::ostream& operator << ( std::ostream& _stream, Text const& _text ) {
for( Text::const_iterator it = _text.begin(), itEnd = _text.end();
it != itEnd; ++it ) {
if( it != _text.begin() )
_stream << "\n";
_stream << *it;
}
return _stream;
}
private:
std::string str;
TextAttributes attr;
std::vector<std::string> lines;
};
} // end namespace Tbc
#ifdef STITCH_TBC_TEXT_FORMAT_OUTER_NAMESPACE
} // end outer namespace
#endif
#endif // TBC_TEXT_FORMAT_H_INCLUDED
// ----------- end of #include from tbc_text_format.h -----------
// ........... back in clara.h
#undef STITCH_TBC_TEXT_FORMAT_OPEN_NAMESPACE
// ----------- #included from clara_compilers.h -----------
/*
* Created by Phil on 10/02/2016.
* Copyright 2016 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef TWOBLUECUBES_CLARA_COMPILERS_H_INCLUDED
#define TWOBLUECUBES_CLARA_COMPILERS_H_INCLUDED
// Detect a number of compiler features - mostly C++11/14 conformance - by compiler
// The following features are defined:
//
// CLARA_CONFIG_CPP11_NULLPTR : is nullptr supported?
// CLARA_CONFIG_CPP11_NOEXCEPT : is noexcept supported?
// CLARA_CONFIG_CPP11_GENERATED_METHODS : The delete and default keywords for compiler generated methods
// CLARA_CONFIG_CPP11_OVERRIDE : is override supported?
// CLARA_CONFIG_CPP11_UNIQUE_PTR : is unique_ptr supported (otherwise use auto_ptr)
// CLARA_CONFIG_CPP11_OR_GREATER : Is C++11 supported?
// CLARA_CONFIG_VARIADIC_MACROS : are variadic macros supported?
// In general each macro has a _NO_<feature name> form
// (e.g. CLARA_CONFIG_CPP11_NO_NULLPTR) which disables the feature.
// Many features, at point of detection, define an _INTERNAL_ macro, so they
// can be combined, en-mass, with the _NO_ forms later.
// All the C++11 features can be disabled with CLARA_CONFIG_NO_CPP11
#ifdef __clang__
#if __has_feature(cxx_nullptr)
#define CLARA_INTERNAL_CONFIG_CPP11_NULLPTR
#endif
#if __has_feature(cxx_noexcept)
#define CLARA_INTERNAL_CONFIG_CPP11_NOEXCEPT
#endif
#endif // __clang__
////////////////////////////////////////////////////////////////////////////////
// GCC
#ifdef __GNUC__
#if __GNUC__ == 4 && __GNUC_MINOR__ >= 6 && defined(__GXX_EXPERIMENTAL_CXX0X__)
#define CLARA_INTERNAL_CONFIG_CPP11_NULLPTR
#endif
// - otherwise more recent versions define __cplusplus >= 201103L
// and will get picked up below
#endif // __GNUC__
////////////////////////////////////////////////////////////////////////////////
// Visual C++
#ifdef _MSC_VER
#if (_MSC_VER >= 1600)
#define CLARA_INTERNAL_CONFIG_CPP11_NULLPTR
#define CLARA_INTERNAL_CONFIG_CPP11_UNIQUE_PTR
#endif
#if (_MSC_VER >= 1900 ) // (VC++ 13 (VS2015))
#define CLARA_INTERNAL_CONFIG_CPP11_NOEXCEPT
#define CLARA_INTERNAL_CONFIG_CPP11_GENERATED_METHODS
#endif
#endif // _MSC_VER
////////////////////////////////////////////////////////////////////////////////
// C++ language feature support
// catch all support for C++11
#if defined(__cplusplus) && __cplusplus >= 201103L
#define CLARA_CPP11_OR_GREATER
#if !defined(CLARA_INTERNAL_CONFIG_CPP11_NULLPTR)
#define CLARA_INTERNAL_CONFIG_CPP11_NULLPTR
#endif
#ifndef CLARA_INTERNAL_CONFIG_CPP11_NOEXCEPT
#define CLARA_INTERNAL_CONFIG_CPP11_NOEXCEPT
#endif
#ifndef CLARA_INTERNAL_CONFIG_CPP11_GENERATED_METHODS
#define CLARA_INTERNAL_CONFIG_CPP11_GENERATED_METHODS
#endif
#if !defined(CLARA_INTERNAL_CONFIG_CPP11_OVERRIDE)
#define CLARA_INTERNAL_CONFIG_CPP11_OVERRIDE
#endif
#if !defined(CLARA_INTERNAL_CONFIG_CPP11_UNIQUE_PTR)
#define CLARA_INTERNAL_CONFIG_CPP11_UNIQUE_PTR
#endif
#endif // __cplusplus >= 201103L
// Now set the actual defines based on the above + anything the user has configured
#if defined(CLARA_INTERNAL_CONFIG_CPP11_NULLPTR) && !defined(CLARA_CONFIG_CPP11_NO_NULLPTR) && !defined(CLARA_CONFIG_CPP11_NULLPTR) && !defined(CLARA_CONFIG_NO_CPP11)
#define CLARA_CONFIG_CPP11_NULLPTR
#endif
#if defined(CLARA_INTERNAL_CONFIG_CPP11_NOEXCEPT) && !defined(CLARA_CONFIG_CPP11_NO_NOEXCEPT) && !defined(CLARA_CONFIG_CPP11_NOEXCEPT) && !defined(CLARA_CONFIG_NO_CPP11)
#define CLARA_CONFIG_CPP11_NOEXCEPT
#endif
#if defined(CLARA_INTERNAL_CONFIG_CPP11_GENERATED_METHODS) && !defined(CLARA_CONFIG_CPP11_NO_GENERATED_METHODS) && !defined(CLARA_CONFIG_CPP11_GENERATED_METHODS) && !defined(CLARA_CONFIG_NO_CPP11)
#define CLARA_CONFIG_CPP11_GENERATED_METHODS
#endif
#if defined(CLARA_INTERNAL_CONFIG_CPP11_OVERRIDE) && !defined(CLARA_CONFIG_NO_OVERRIDE) && !defined(CLARA_CONFIG_CPP11_OVERRIDE) && !defined(CLARA_CONFIG_NO_CPP11)
#define CLARA_CONFIG_CPP11_OVERRIDE
#endif
#if defined(CLARA_INTERNAL_CONFIG_CPP11_UNIQUE_PTR) && !defined(CLARA_CONFIG_NO_UNIQUE_PTR) && !defined(CLARA_CONFIG_CPP11_UNIQUE_PTR) && !defined(CLARA_CONFIG_NO_CPP11)
#define CLARA_CONFIG_CPP11_UNIQUE_PTR
#endif
// noexcept support:
#if defined(CLARA_CONFIG_CPP11_NOEXCEPT) && !defined(CLARA_NOEXCEPT)
#define CLARA_NOEXCEPT noexcept
# define CLARA_NOEXCEPT_IS(x) noexcept(x)
#else
#define CLARA_NOEXCEPT throw()
# define CLARA_NOEXCEPT_IS(x)
#endif
// nullptr support
#ifdef CLARA_CONFIG_CPP11_NULLPTR
#define CLARA_NULL nullptr
#else
#define CLARA_NULL NULL
#endif
// override support
#ifdef CLARA_CONFIG_CPP11_OVERRIDE
#define CLARA_OVERRIDE override
#else
#define CLARA_OVERRIDE
#endif
// unique_ptr support
#ifdef CLARA_CONFIG_CPP11_UNIQUE_PTR
# define CLARA_AUTO_PTR( T ) std::unique_ptr<T>
#else
# define CLARA_AUTO_PTR( T ) std::auto_ptr<T>
#endif
#endif // TWOBLUECUBES_CLARA_COMPILERS_H_INCLUDED
// ----------- end of #include from clara_compilers.h -----------
// ........... back in clara.h
#include <map>
#include <stdexcept>
#include <memory>
#if defined(WIN32) || defined(__WIN32__) || defined(_WIN32) || defined(_MSC_VER)
#define CLARA_PLATFORM_WINDOWS
#endif
// Use optional outer namespace
#ifdef STITCH_CLARA_OPEN_NAMESPACE
STITCH_CLARA_OPEN_NAMESPACE
#endif
namespace Clara {
struct UnpositionalTag {};
extern UnpositionalTag _;
#ifdef CLARA_CONFIG_MAIN
UnpositionalTag _;
#endif
namespace Detail {
#ifdef CLARA_CONSOLE_WIDTH
const unsigned int consoleWidth = CLARA_CONFIG_CONSOLE_WIDTH;
#else
const unsigned int consoleWidth = 80;
#endif
using namespace Tbc;
inline bool startsWith( std::string const& str, std::string const& prefix ) {
return str.size() >= prefix.size() && str.substr( 0, prefix.size() ) == prefix;
}
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; };
template<typename T> struct IsBool { static const bool value = false; };
template<> struct IsBool<bool> { static const bool value = true; };
template<typename T>
void convertInto( std::string const& _source, T& _dest ) {
std::stringstream ss;
ss << _source;
ss >> _dest;
if( ss.fail() )
throw std::runtime_error( "Unable to convert " + _source + " to destination type" );
}
inline void convertInto( std::string const& _source, std::string& _dest ) {
_dest = _source;
}
inline void convertInto( std::string const& _source, bool& _dest ) {
std::string sourceLC = _source;
std::transform( sourceLC.begin(), sourceLC.end(), sourceLC.begin(), ::tolower );
if( sourceLC == "y" || sourceLC == "1" || sourceLC == "true" || sourceLC == "yes" || sourceLC == "on" )
_dest = true;
else if( sourceLC == "n" || sourceLC == "0" || sourceLC == "false" || sourceLC == "no" || sourceLC == "off" )
_dest = false;
else
throw std::runtime_error( "Expected a boolean value but did not recognise:\n '" + _source + "'" );
}
template<typename ConfigT>
struct IArgFunction {
virtual ~IArgFunction() {}
#ifdef CLARA_CONFIG_CPP11_GENERATED_METHODS
IArgFunction() = default;
IArgFunction( IArgFunction const& ) = default;
#endif
virtual void set( ConfigT& config, std::string const& value ) const = 0;
virtual bool takesArg() const = 0;
virtual IArgFunction* clone() const = 0;
};
template<typename ConfigT>
class BoundArgFunction {
public:
BoundArgFunction() : functionObj( CLARA_NULL ) {}
BoundArgFunction( IArgFunction<ConfigT>* _functionObj ) : functionObj( _functionObj ) {}
BoundArgFunction( BoundArgFunction const& other ) : functionObj( other.functionObj ? other.functionObj->clone() : CLARA_NULL ) {}
BoundArgFunction& operator = ( BoundArgFunction const& other ) {
IArgFunction<ConfigT>* newFunctionObj = other.functionObj ? other.functionObj->clone() : CLARA_NULL;
delete functionObj;
functionObj = newFunctionObj;
return *this;
}
~BoundArgFunction() { delete functionObj; }
void set( ConfigT& config, std::string const& value ) const {
functionObj->set( config, value );
}
bool takesArg() const { return functionObj->takesArg(); }
bool isSet() const {
return functionObj != CLARA_NULL;
}
private:
IArgFunction<ConfigT>* functionObj;
};
template<typename C>
struct NullBinder : IArgFunction<C>{
virtual void set( C&, std::string const& ) const {}
virtual bool takesArg() const { return true; }
virtual IArgFunction<C>* clone() const { return new NullBinder( *this ); }
};
template<typename C, typename M>
struct BoundDataMember : IArgFunction<C>{
BoundDataMember( M C::* _member ) : member( _member ) {}
virtual void set( C& p, std::string const& stringValue ) const {
convertInto( stringValue, p.*member );
}
virtual bool takesArg() const { return !IsBool<M>::value; }
virtual IArgFunction<C>* clone() const { return new BoundDataMember( *this ); }
M C::* member;
};
template<typename C, typename M>
struct BoundUnaryMethod : IArgFunction<C>{
BoundUnaryMethod( void (C::*_member)( M ) ) : member( _member ) {}
virtual void set( C& p, std::string const& stringValue ) const {
typename RemoveConstRef<M>::type value;
convertInto( stringValue, value );
(p.*member)( value );
}
virtual bool takesArg() const { return !IsBool<M>::value; }
virtual IArgFunction<C>* clone() const { return new BoundUnaryMethod( *this ); }
void (C::*member)( M );
};
template<typename C>
struct BoundNullaryMethod : IArgFunction<C>{
BoundNullaryMethod( void (C::*_member)() ) : member( _member ) {}
virtual void set( C& p, std::string const& stringValue ) const {
bool value;
convertInto( stringValue, value );
if( value )
(p.*member)();
}
virtual bool takesArg() const { return false; }
virtual IArgFunction<C>* clone() const { return new BoundNullaryMethod( *this ); }
void (C::*member)();
};
template<typename C>
struct BoundUnaryFunction : IArgFunction<C>{
BoundUnaryFunction( void (*_function)( C& ) ) : function( _function ) {}
virtual void set( C& obj, std::string const& stringValue ) const {
bool value;
convertInto( stringValue, value );
if( value )
function( obj );
}
virtual bool takesArg() const { return false; }
virtual IArgFunction<C>* clone() const { return new BoundUnaryFunction( *this ); }
void (*function)( C& );
};
template<typename C, typename T>
struct BoundBinaryFunction : IArgFunction<C>{
BoundBinaryFunction( void (*_function)( C&, T ) ) : function( _function ) {}
virtual void set( C& obj, std::string const& stringValue ) const {
typename RemoveConstRef<T>::type value;
convertInto( stringValue, value );
function( obj, value );
}
virtual bool takesArg() const { return !IsBool<T>::value; }
virtual IArgFunction<C>* clone() const { return new BoundBinaryFunction( *this ); }
void (*function)( C&, T );
};
} // namespace Detail
inline std::vector<std::string> argsToVector( int argc, char const* const* const argv ) {
std::vector<std::string> args( static_cast<std::size_t>( argc ) );
for( std::size_t i = 0; i < static_cast<std::size_t>( argc ); ++i )
args[i] = argv[i];
return args;
}
class Parser {
enum Mode { None, MaybeShortOpt, SlashOpt, ShortOpt, LongOpt, Positional };
Mode mode;
std::size_t from;
bool inQuotes;
public:
struct Token {
enum Type { Positional, ShortOpt, LongOpt };
Token( Type _type, std::string const& _data ) : type( _type ), data( _data ) {}
Type type;
std::string data;
};
Parser() : mode( None ), from( 0 ), inQuotes( false ){}
void parseIntoTokens( std::vector<std::string> const& args, std::vector<Token>& tokens ) {
const std::string doubleDash = "--";
for( std::size_t i = 1; i < args.size() && args[i] != doubleDash; ++i )
parseIntoTokens( args[i], tokens);
}
void parseIntoTokens( std::string const& arg, std::vector<Token>& tokens ) {
for( std::size_t i = 0; i <= arg.size(); ++i ) {
char c = arg[i];
if( c == '"' )
inQuotes = !inQuotes;
mode = handleMode( i, c, arg, tokens );
}
}
Mode handleMode( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
switch( mode ) {
case None: return handleNone( i, c );
case MaybeShortOpt: return handleMaybeShortOpt( i, c );
case ShortOpt:
case LongOpt:
case SlashOpt: return handleOpt( i, c, arg, tokens );
case Positional: return handlePositional( i, c, arg, tokens );
default: throw std::logic_error( "Unknown mode" );
}
}
Mode handleNone( std::size_t i, char c ) {
if( inQuotes ) {
from = i;
return Positional;
}
switch( c ) {
case '-': return MaybeShortOpt;
#ifdef CLARA_PLATFORM_WINDOWS
case '/': from = i+1; return SlashOpt;
#endif
default: from = i; return Positional;
}
}
Mode handleMaybeShortOpt( std::size_t i, char c ) {
switch( c ) {
case '-': from = i+1; return LongOpt;
default: from = i; return ShortOpt;
}
}
Mode handleOpt( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
if( std::string( " \t:=\0", 5 ).find( c ) == std::string::npos )
return mode;
std::string optName = arg.substr( from, i-from );
if( mode == ShortOpt )
for( std::size_t j = 0; j < optName.size(); ++j )
tokens.push_back( Token( Token::ShortOpt, optName.substr( j, 1 ) ) );
else if( mode == SlashOpt && optName.size() == 1 )
tokens.push_back( Token( Token::ShortOpt, optName ) );
else
tokens.push_back( Token( Token::LongOpt, optName ) );
return None;
}
Mode handlePositional( std::size_t i, char c, std::string const& arg, std::vector<Token>& tokens ) {
if( inQuotes || std::string( " \t\0", 3 ).find( c ) == std::string::npos )
return mode;
std::string data = arg.substr( from, i-from );
tokens.push_back( Token( Token::Positional, data ) );
return None;
}
};
template<typename ConfigT>
struct CommonArgProperties {
CommonArgProperties() {}
CommonArgProperties( Detail::BoundArgFunction<ConfigT> const& _boundField ) : boundField( _boundField ) {}
Detail::BoundArgFunction<ConfigT> boundField;
std::string description;
std::string detail;
std::string placeholder; // Only value if boundField takes an arg
bool takesArg() const {
return !placeholder.empty();
}
void validate() const {
if( !boundField.isSet() )
throw std::logic_error( "option not bound" );
}
};
struct OptionArgProperties {
std::vector<std::string> shortNames;
std::string longName;
bool hasShortName( std::string const& shortName ) const {
return std::find( shortNames.begin(), shortNames.end(), shortName ) != shortNames.end();
}
bool hasLongName( std::string const& _longName ) const {
return _longName == longName;
}
};
struct PositionalArgProperties {
PositionalArgProperties() : position( -1 ) {}
int position; // -1 means non-positional (floating)
bool isFixedPositional() const {
return position != -1;
}
};
template<typename ConfigT>
class CommandLine {
struct Arg : CommonArgProperties<ConfigT>, OptionArgProperties, PositionalArgProperties {
Arg() {}
Arg( Detail::BoundArgFunction<ConfigT> const& _boundField ) : CommonArgProperties<ConfigT>( _boundField ) {}
using CommonArgProperties<ConfigT>::placeholder; // !TBD
std::string dbgName() const {
if( !longName.empty() )
return "--" + longName;
if( !shortNames.empty() )
return "-" + shortNames[0];
return "positional args";
}
std::string commands() const {
std::ostringstream oss;
bool first = true;
std::vector<std::string>::const_iterator it = shortNames.begin(), itEnd = shortNames.end();
for(; it != itEnd; ++it ) {
if( first )
first = false;
else
oss << ", ";
oss << "-" << *it;
}
if( !longName.empty() ) {
if( !first )
oss << ", ";
oss << "--" << longName;
}
if( !placeholder.empty() )
oss << " <" << placeholder << ">";
return oss.str();
}
};
typedef CLARA_AUTO_PTR( Arg ) ArgAutoPtr;
friend void addOptName( Arg& arg, std::string const& optName )
{
if( optName.empty() )
return;
if( Detail::startsWith( optName, "--" ) ) {
if( !arg.longName.empty() )
throw std::logic_error( "Only one long opt may be specified. '"
+ arg.longName
+ "' already specified, now attempting to add '"
+ optName + "'" );
arg.longName = optName.substr( 2 );
}
else if( Detail::startsWith( optName, "-" ) )
arg.shortNames.push_back( optName.substr( 1 ) );
else
throw std::logic_error( "option must begin with - or --. Option was: '" + optName + "'" );
}
friend void setPositionalArg( Arg& arg, int position )
{
arg.position = position;
}
class ArgBuilder {
public:
ArgBuilder( Arg* arg ) : m_arg( arg ) {}
// Bind a non-boolean data member (requires placeholder string)
template<typename C, typename M>
void bind( M C::* field, std::string const& placeholder ) {
m_arg->boundField = new Detail::BoundDataMember<C,M>( field );
m_arg->placeholder = placeholder;
}
// Bind a boolean data member (no placeholder required)
template<typename C>
void bind( bool C::* field ) {
m_arg->boundField = new Detail::BoundDataMember<C,bool>( field );
}
// Bind a method taking a single, non-boolean argument (requires a placeholder string)
template<typename C, typename M>
void bind( void (C::* unaryMethod)( M ), std::string const& placeholder ) {
m_arg->boundField = new Detail::BoundUnaryMethod<C,M>( unaryMethod );
m_arg->placeholder = placeholder;
}
// Bind a method taking a single, boolean argument (no placeholder string required)
template<typename C>
void bind( void (C::* unaryMethod)( bool ) ) {
m_arg->boundField = new Detail::BoundUnaryMethod<C,bool>( unaryMethod );
}
// Bind a method that takes no arguments (will be called if opt is present)
template<typename C>
void bind( void (C::* nullaryMethod)() ) {
m_arg->boundField = new Detail::BoundNullaryMethod<C>( nullaryMethod );
}
// Bind a free function taking a single argument - the object to operate on (no placeholder string required)
template<typename C>
void bind( void (* unaryFunction)( C& ) ) {
m_arg->boundField = new Detail::BoundUnaryFunction<C>( unaryFunction );
}
// Bind a free function taking a single argument - the object to operate on (requires a placeholder string)
template<typename C, typename T>
void bind( void (* binaryFunction)( C&, T ), std::string const& placeholder ) {
m_arg->boundField = new Detail::BoundBinaryFunction<C, T>( binaryFunction );
m_arg->placeholder = placeholder;
}
ArgBuilder& describe( std::string const& description ) {
m_arg->description = description;
return *this;
}
ArgBuilder& detail( std::string const& detail ) {
m_arg->detail = detail;
return *this;
}
protected:
Arg* m_arg;
};
class OptBuilder : public ArgBuilder {
public:
OptBuilder( Arg* arg ) : ArgBuilder( arg ) {}
OptBuilder( OptBuilder& other ) : ArgBuilder( other ) {}
OptBuilder& operator[]( std::string const& optName ) {
addOptName( *ArgBuilder::m_arg, optName );
return *this;
}
};
public:
CommandLine()
: m_boundProcessName( new Detail::NullBinder<ConfigT>() ),
m_highestSpecifiedArgPosition( 0 ),
m_throwOnUnrecognisedTokens( false )
{}
CommandLine( CommandLine const& other )
: m_boundProcessName( other.m_boundProcessName ),
m_options ( other.m_options ),
m_positionalArgs( other.m_positionalArgs ),
m_highestSpecifiedArgPosition( other.m_highestSpecifiedArgPosition ),
m_throwOnUnrecognisedTokens( other.m_throwOnUnrecognisedTokens )
{
if( other.m_floatingArg.get() )
m_floatingArg.reset( new Arg( *other.m_floatingArg ) );
}
CommandLine& setThrowOnUnrecognisedTokens( bool shouldThrow = true ) {
m_throwOnUnrecognisedTokens = shouldThrow;
return *this;
}
OptBuilder operator[]( std::string const& optName ) {
m_options.push_back( Arg() );
addOptName( m_options.back(), optName );
OptBuilder builder( &m_options.back() );
return builder;
}
ArgBuilder operator[]( int position ) {
m_positionalArgs.insert( std::make_pair( position, Arg() ) );
if( position > m_highestSpecifiedArgPosition )
m_highestSpecifiedArgPosition = position;
setPositionalArg( m_positionalArgs[position], position );
ArgBuilder builder( &m_positionalArgs[position] );
return builder;
}
// Invoke this with the _ instance
ArgBuilder operator[]( UnpositionalTag ) {
if( m_floatingArg.get() )
throw std::logic_error( "Only one unpositional argument can be added" );
m_floatingArg.reset( new Arg() );
ArgBuilder builder( m_floatingArg.get() );
return builder;
}
template<typename C, typename M>
void bindProcessName( M C::* field ) {
m_boundProcessName = new Detail::BoundDataMember<C,M>( field );
}
template<typename C, typename M>
void bindProcessName( void (C::*_unaryMethod)( M ) ) {
m_boundProcessName = new Detail::BoundUnaryMethod<C,M>( _unaryMethod );
}
void optUsage( std::ostream& os, std::size_t indent = 0, std::size_t width = Detail::consoleWidth ) const {
typename std::vector<Arg>::const_iterator itBegin = m_options.begin(), itEnd = m_options.end(), it;
std::size_t maxWidth = 0;
for( it = itBegin; it != itEnd; ++it )
maxWidth = (std::max)( maxWidth, it->commands().size() );
for( it = itBegin; it != itEnd; ++it ) {
Detail::Text usage( it->commands(), Detail::TextAttributes()
.setWidth( maxWidth+indent )
.setIndent( indent ) );
Detail::Text desc( it->description, Detail::TextAttributes()
.setWidth( width - maxWidth - 3 ) );
for( std::size_t i = 0; i < (std::max)( usage.size(), desc.size() ); ++i ) {
std::string usageCol = i < usage.size() ? usage[i] : "";
os << usageCol;
if( i < desc.size() && !desc[i].empty() )
os << std::string( indent + 2 + maxWidth - usageCol.size(), ' ' )
<< desc[i];
os << "\n";
}
}
}
std::string optUsage() const {
std::ostringstream oss;
optUsage( oss );
return oss.str();
}
void argSynopsis( std::ostream& os ) const {
for( int i = 1; i <= m_highestSpecifiedArgPosition; ++i ) {
if( i > 1 )
os << " ";
typename std::map<int, Arg>::const_iterator it = m_positionalArgs.find( i );
if( it != m_positionalArgs.end() )
os << "<" << it->second.placeholder << ">";
else if( m_floatingArg.get() )
os << "<" << m_floatingArg->placeholder << ">";
else
throw std::logic_error( "non consecutive positional arguments with no floating args" );
}
// !TBD No indication of mandatory args
if( m_floatingArg.get() ) {
if( m_highestSpecifiedArgPosition > 1 )
os << " ";
os << "[<" << m_floatingArg->placeholder << "> ...]";
}
}
std::string argSynopsis() const {
std::ostringstream oss;
argSynopsis( oss );
return oss.str();
}
void usage( std::ostream& os, std::string const& procName ) const {
validate();
os << "usage:\n " << procName << " ";
argSynopsis( os );
if( !m_options.empty() ) {
os << " [options]\n\nwhere options are: \n";
optUsage( os, 2 );
}
os << "\n";
}
std::string usage( std::string const& procName ) const {
std::ostringstream oss;
usage( oss, procName );
return oss.str();
}
ConfigT parse( std::vector<std::string> const& args ) const {
ConfigT config;
parseInto( args, config );
return config;
}
std::vector<Parser::Token> parseInto( std::vector<std::string> const& args, ConfigT& config ) const {
std::string processName = args[0];
std::size_t lastSlash = processName.find_last_of( "/\\" );
if( lastSlash != std::string::npos )
processName = processName.substr( lastSlash+1 );
m_boundProcessName.set( config, processName );
std::vector<Parser::Token> tokens;
Parser parser;
parser.parseIntoTokens( args, tokens );
return populate( tokens, config );
}
std::vector<Parser::Token> populate( std::vector<Parser::Token> const& tokens, ConfigT& config ) const {
validate();
std::vector<Parser::Token> unusedTokens = populateOptions( tokens, config );
unusedTokens = populateFixedArgs( unusedTokens, config );
unusedTokens = populateFloatingArgs( unusedTokens, config );
return unusedTokens;
}
std::vector<Parser::Token> populateOptions( std::vector<Parser::Token> const& tokens, ConfigT& config ) const {
std::vector<Parser::Token> unusedTokens;
std::vector<std::string> errors;
for( std::size_t i = 0; i < tokens.size(); ++i ) {
Parser::Token const& token = tokens[i];
typename std::vector<Arg>::const_iterator it = m_options.begin(), itEnd = m_options.end();
for(; it != itEnd; ++it ) {
Arg const& arg = *it;
try {
if( ( token.type == Parser::Token::ShortOpt && arg.hasShortName( token.data ) ) ||
( token.type == Parser::Token::LongOpt && arg.hasLongName( token.data ) ) ) {
if( arg.takesArg() ) {
if( i == tokens.size()-1 || tokens[i+1].type != Parser::Token::Positional )
errors.push_back( "Expected argument to option: " + token.data );
else
arg.boundField.set( config, tokens[++i].data );
}
else {
arg.boundField.set( config, "true" );
}
break;
}
}
catch( std::exception& ex ) {
errors.push_back( std::string( ex.what() ) + "\n- while parsing: (" + arg.commands() + ")" );
}
}
if( it == itEnd ) {
if( token.type == Parser::Token::Positional || !m_throwOnUnrecognisedTokens )
unusedTokens.push_back( token );
else if( errors.empty() && m_throwOnUnrecognisedTokens )
errors.push_back( "unrecognised option: " + token.data );
}
}
if( !errors.empty() ) {
std::ostringstream oss;
for( std::vector<std::string>::const_iterator it = errors.begin(), itEnd = errors.end();
it != itEnd;
++it ) {
if( it != errors.begin() )
oss << "\n";
oss << *it;
}
throw std::runtime_error( oss.str() );
}
return unusedTokens;
}
std::vector<Parser::Token> populateFixedArgs( std::vector<Parser::Token> const& tokens, ConfigT& config ) const {
std::vector<Parser::Token> unusedTokens;
int position = 1;
for( std::size_t i = 0; i < tokens.size(); ++i ) {
Parser::Token const& token = tokens[i];
typename std::map<int, Arg>::const_iterator it = m_positionalArgs.find( position );
if( it != m_positionalArgs.end() )
it->second.boundField.set( config, token.data );
else
unusedTokens.push_back( token );
if( token.type == Parser::Token::Positional )
position++;
}
return unusedTokens;
}
std::vector<Parser::Token> populateFloatingArgs( std::vector<Parser::Token> const& tokens, ConfigT& config ) const {
if( !m_floatingArg.get() )
return tokens;
std::vector<Parser::Token> unusedTokens;
for( std::size_t i = 0; i < tokens.size(); ++i ) {
Parser::Token const& token = tokens[i];
if( token.type == Parser::Token::Positional )
m_floatingArg->boundField.set( config, token.data );
else
unusedTokens.push_back( token );
}
return unusedTokens;
}
void validate() const
{
if( m_options.empty() && m_positionalArgs.empty() && !m_floatingArg.get() )
throw std::logic_error( "No options or arguments specified" );
for( typename std::vector<Arg>::const_iterator it = m_options.begin(),
itEnd = m_options.end();
it != itEnd; ++it )
it->validate();
}
private:
Detail::BoundArgFunction<ConfigT> m_boundProcessName;
std::vector<Arg> m_options;
std::map<int, Arg> m_positionalArgs;
ArgAutoPtr m_floatingArg;
int m_highestSpecifiedArgPosition;
bool m_throwOnUnrecognisedTokens;
};
} // end namespace Clara
STITCH_CLARA_CLOSE_NAMESPACE
#undef STITCH_CLARA_OPEN_NAMESPACE
#undef STITCH_CLARA_CLOSE_NAMESPACE
#endif // TWOBLUECUBES_CLARA_H_INCLUDED
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