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e45e3a139a
- this allows use within an environment that appends additional arguments that Clara will otherwise reject - generated build 23
587 lines
24 KiB
C++
587 lines
24 KiB
C++
/*
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* Created by Phil on 25/05/2013.
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* Copyright 2013 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef TWOBLUECUBES_CLARA_H_INCLUDED
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#define TWOBLUECUBES_CLARA_H_INCLUDED
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#include "catch_text.h" // This will get moved out too
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namespace Clara {
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namespace Detail {
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template<typename T> struct RemoveConstRef{ typedef T type; };
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template<typename T> struct RemoveConstRef<T&>{ typedef T type; };
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template<typename T> struct RemoveConstRef<T const&>{ typedef T type; };
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template<typename T> struct RemoveConstRef<T const>{ typedef T type; };
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template<typename T> struct IsBool { static const bool value = false; };
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template<> struct IsBool<bool> { static const bool value = true; };
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template<typename T>
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void convertInto( std::string const& _source, T& _dest ) {
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std::stringstream ss;
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ss << _source;
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ss >> _dest;
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if( ss.fail() )
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throw std::runtime_error( "Unable to convert " + _source + " to destination type" );
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}
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inline void convertInto( std::string const& _source, std::string& _dest ) {
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_dest = _source;
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}
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inline void convertInto( std::string const& _source, bool& _dest ) {
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std::string sourceLC = _source;
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std::transform( sourceLC.begin(), sourceLC.end(), sourceLC.begin(), ::tolower );
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if( sourceLC == "y" || sourceLC == "1" || sourceLC == "true" || sourceLC == "yes" || sourceLC == "on" )
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_dest = true;
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else if( sourceLC == "n" || sourceLC == "0" || sourceLC == "false" || sourceLC == "no" || sourceLC == "off" )
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_dest = false;
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else
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throw std::runtime_error( "Expected a boolean value but did not recognise:\n '" + _source + "'" );
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}
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inline void convertInto( bool _source, bool& _dest ) {
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_dest = _source;
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}
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template<typename T>
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inline void convertInto( bool, T& ) {
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throw std::runtime_error( "Invalid conversion" );
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}
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template<typename ConfigT>
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struct IArgFunction {
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virtual ~IArgFunction() {}
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virtual void set( ConfigT& config, std::string const& value ) const = 0;
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virtual void setFlag( ConfigT& config ) const = 0;
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virtual bool takesArg() const = 0;
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virtual IArgFunction* clone() const = 0;
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};
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template<typename ConfigT>
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class BoundArgFunction {
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public:
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BoundArgFunction( IArgFunction<ConfigT>* _functionObj ) : functionObj( _functionObj ) {}
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BoundArgFunction( BoundArgFunction const& other ) : functionObj( other.functionObj->clone() ) {}
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BoundArgFunction& operator = ( BoundArgFunction const& other ) {
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IArgFunction<ConfigT>* newFunctionObj = other.functionObj->clone();
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delete functionObj;
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functionObj = newFunctionObj;
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return *this;
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}
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~BoundArgFunction() { delete functionObj; }
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void set( ConfigT& config, std::string const& value ) const {
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functionObj->set( config, value );
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}
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void setFlag( ConfigT& config ) const {
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functionObj->setFlag( config );
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}
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bool takesArg() const { return functionObj->takesArg(); }
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private:
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IArgFunction<ConfigT>* functionObj;
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};
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template<typename C>
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struct NullBinder : IArgFunction<C>{
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virtual void set( C&, std::string const& ) const {}
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virtual void setFlag( C& ) const {}
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virtual bool takesArg() const { return true; }
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virtual IArgFunction<C>* clone() const { return new NullBinder( *this ); }
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};
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template<typename C, typename M>
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struct BoundDataMember : IArgFunction<C>{
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BoundDataMember( M C::* _member ) : member( _member ) {}
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virtual void set( C& p, std::string const& stringValue ) const {
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convertInto( stringValue, p.*member );
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}
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virtual void setFlag( C& p ) const {
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convertInto( true, p.*member );
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}
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virtual bool takesArg() const { return !IsBool<M>::value; }
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virtual IArgFunction<C>* clone() const { return new BoundDataMember( *this ); }
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M C::* member;
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};
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template<typename C, typename M>
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struct BoundUnaryMethod : IArgFunction<C>{
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BoundUnaryMethod( void (C::*_member)( M ) ) : member( _member ) {}
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virtual void set( C& p, std::string const& stringValue ) const {
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typename RemoveConstRef<M>::type value;
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convertInto( stringValue, value );
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(p.*member)( value );
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}
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virtual void setFlag( C& p ) const {
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typename RemoveConstRef<M>::type value;
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convertInto( true, value );
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(p.*member)( value );
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}
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virtual bool takesArg() const { return !IsBool<M>::value; }
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virtual IArgFunction<C>* clone() const { return new BoundUnaryMethod( *this ); }
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void (C::*member)( M );
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};
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template<typename C>
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struct BoundNullaryMethod : IArgFunction<C>{
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BoundNullaryMethod( void (C::*_member)() ) : member( _member ) {}
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virtual void set( C& p, std::string const& stringValue ) const {
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bool value;
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convertInto( stringValue, value );
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if( value )
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(p.*member)();
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}
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virtual void setFlag( C& p ) const {
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(p.*member)();
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}
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virtual bool takesArg() const { return false; }
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virtual IArgFunction<C>* clone() const { return new BoundNullaryMethod( *this ); }
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void (C::*member)();
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};
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template<typename C>
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struct BoundUnaryFunction : IArgFunction<C>{
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BoundUnaryFunction( void (*_function)( C& ) ) : function( _function ) {}
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virtual void set( C& obj, std::string const& stringValue ) const {
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bool value;
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convertInto( stringValue, value );
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if( value )
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function( obj );
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}
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virtual void setFlag( C& p ) const {
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function( p );
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}
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virtual bool takesArg() const { return false; }
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virtual IArgFunction<C>* clone() const { return new BoundUnaryFunction( *this ); }
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void (*function)( C& );
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};
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template<typename C, typename T>
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struct BoundBinaryFunction : IArgFunction<C>{
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BoundBinaryFunction( void (*_function)( C&, T ) ) : function( _function ) {}
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virtual void set( C& obj, std::string const& stringValue ) const {
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typename RemoveConstRef<T>::type value;
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convertInto( stringValue, value );
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function( obj, value );
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}
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virtual void setFlag( C& obj ) const {
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typename RemoveConstRef<T>::type value;
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convertInto( true, value );
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function( obj, value );
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}
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virtual bool takesArg() const { return !IsBool<T>::value; }
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virtual IArgFunction<C>* clone() const { return new BoundBinaryFunction( *this ); }
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void (*function)( C&, T );
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};
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template<typename C, typename M>
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BoundArgFunction<C> makeBoundField( M C::* _member ) {
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return BoundArgFunction<C>( new BoundDataMember<C,M>( _member ) );
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}
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template<typename C, typename M>
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BoundArgFunction<C> makeBoundField( void (C::*_member)( M ) ) {
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return BoundArgFunction<C>( new BoundUnaryMethod<C,M>( _member ) );
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}
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template<typename C>
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BoundArgFunction<C> makeBoundField( void (C::*_member)() ) {
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return BoundArgFunction<C>( new BoundNullaryMethod<C>( _member ) );
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}
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template<typename C>
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BoundArgFunction<C> makeBoundField( void (*_function)( C& ) ) {
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return BoundArgFunction<C>( new BoundUnaryFunction<C>( _function ) );
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}
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template<typename C, typename T>
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BoundArgFunction<C> makeBoundField( void (*_function)( C&, T ) ) {
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return BoundArgFunction<C>( new BoundBinaryFunction<C, T>( _function ) );
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}
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} // namespace Detail
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struct Parser {
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Parser() : separators( " \t=:" ) {}
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struct Token {
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enum Type { Positional, ShortOpt, LongOpt };
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Token( Type _type, std::string const& _data ) : type( _type ), data( _data ) {}
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Type type;
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std::string data;
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};
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void parseIntoTokens( int argc, char const * const * argv, std::vector<Parser::Token>& tokens ) const {
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const std::string doubleDash = "--";
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for( int i = 1; i < argc && argv[i] != doubleDash; ++i )
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parseIntoTokens( argv[i] , tokens);
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}
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void parseIntoTokens( std::string arg, std::vector<Parser::Token>& tokens ) const {
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while( !arg.empty() ) {
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Parser::Token token( Parser::Token::Positional, arg );
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arg = "";
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if( token.data[0] == '-' ) {
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if( token.data.size() > 1 && token.data[1] == '-' ) {
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token = Parser::Token( Parser::Token::LongOpt, token.data.substr( 2 ) );
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}
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else {
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token = Parser::Token( Parser::Token::ShortOpt, token.data.substr( 1 ) );
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if( token.data.size() > 1 && separators.find( token.data[1] ) == std::string::npos ) {
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arg = "-" + token.data.substr( 1 );
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token.data = token.data.substr( 0, 1 );
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}
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}
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}
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if( token.type != Parser::Token::Positional ) {
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std::size_t pos = token.data.find_first_of( separators );
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if( pos != std::string::npos ) {
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arg = token.data.substr( pos+1 );
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token.data = token.data.substr( 0, pos );
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}
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}
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tokens.push_back( token );
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}
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}
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std::string separators;
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};
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template<typename ConfigT>
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class CommandLine {
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struct Arg {
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Arg( Detail::BoundArgFunction<ConfigT> const& _boundField ) : boundField( _boundField ), position( -1 ) {}
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bool hasShortName( std::string const& shortName ) const {
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for( std::vector<std::string>::const_iterator
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it = shortNames.begin(), itEnd = shortNames.end();
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it != itEnd;
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++it )
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if( *it == shortName )
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return true;
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return false;
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}
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bool hasLongName( std::string const& _longName ) const {
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return _longName == longName;
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}
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bool takesArg() const {
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return !hint.empty();
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}
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bool isFixedPositional() const {
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return position != -1;
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}
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bool isAnyPositional() const {
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return position == -1 && shortNames.empty() && longName.empty();
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}
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std::string dbgName() const {
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if( !longName.empty() )
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return "--" + longName;
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if( !shortNames.empty() )
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return "-" + shortNames[0];
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return "positional args";
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}
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void validate() const {
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if( boundField.takesArg() && !takesArg() )
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throw std::logic_error( dbgName() + " must specify an arg name" );
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}
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std::string commands() const {
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std::ostringstream oss;
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bool first = true;
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std::vector<std::string>::const_iterator it = shortNames.begin(), itEnd = shortNames.end();
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for(; it != itEnd; ++it ) {
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if( first )
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first = false;
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else
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oss << ", ";
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oss << "-" << *it;
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}
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if( !longName.empty() ) {
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if( !first )
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oss << ", ";
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oss << "--" << longName;
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}
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if( !hint.empty() )
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oss << " <" << hint << ">";
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return oss.str();
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}
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Detail::BoundArgFunction<ConfigT> boundField;
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std::vector<std::string> shortNames;
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std::string longName;
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std::string description;
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std::string hint;
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int position;
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};
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// NOTE: std::auto_ptr is deprecated in c++11/c++0x
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#if defined(__cplusplus) && __cplusplus > 199711L
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typedef std::unique_ptr<Arg> ArgAutoPtr;
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#else
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typedef std::auto_ptr<Arg> ArgAutoPtr;
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#endif
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class ArgBinder {
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public:
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template<typename F>
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ArgBinder( CommandLine* cl, F f )
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: m_cl( cl ),
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m_arg( Detail::makeBoundField( f ) )
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{}
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ArgBinder( ArgBinder& other )
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: m_cl( other.m_cl ),
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m_arg( other.m_arg )
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{
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other.m_cl = NULL;
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}
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~ArgBinder() {
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if( m_cl ) {
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m_arg.validate();
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if( m_arg.isFixedPositional() ) {
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m_cl->m_positionalArgs.insert( std::make_pair( m_arg.position, m_arg ) );
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if( m_arg.position > m_cl->m_highestSpecifiedArgPosition )
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m_cl->m_highestSpecifiedArgPosition = m_arg.position;
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}
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else if( m_arg.isAnyPositional() ) {
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if( m_cl->m_arg.get() )
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throw std::logic_error( "Only one unpositional argument can be added" );
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m_cl->m_arg = ArgAutoPtr( new Arg( m_arg ) );
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}
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else
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m_cl->m_options.push_back( m_arg );
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}
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}
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ArgBinder& shortOpt( std::string const& name ) {
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m_arg.shortNames.push_back( name );
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return *this;
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}
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ArgBinder& longOpt( std::string const& name ) {
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m_arg.longName = name;
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return *this;
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}
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ArgBinder& describe( std::string const& description ) {
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m_arg.description = description;
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return *this;
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}
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ArgBinder& hint( std::string const& hint ) {
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m_arg.hint = hint;
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return *this;
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}
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ArgBinder& position( int position ) {
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m_arg.position = position;
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return *this;
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}
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private:
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CommandLine* m_cl;
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Arg m_arg;
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};
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public:
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CommandLine()
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: m_boundProcessName( new Detail::NullBinder<ConfigT>() ),
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m_highestSpecifiedArgPosition( 0 ),
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m_throwOnUnrecognisedTokens( false )
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{}
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CommandLine( CommandLine const& other )
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: m_boundProcessName( other.m_boundProcessName ),
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m_options ( other.m_options ),
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m_positionalArgs( other.m_positionalArgs ),
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m_highestSpecifiedArgPosition( other.m_highestSpecifiedArgPosition ),
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m_throwOnUnrecognisedTokens( other.m_throwOnUnrecognisedTokens )
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{
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if( other.m_arg.get() )
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m_arg = ArgAutoPtr( new Arg( *other.m_arg ) );
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}
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CommandLine& setThrowOnUnrecognisedTokens( bool shouldThrow = true ) {
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m_throwOnUnrecognisedTokens = shouldThrow;
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return *this;
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}
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template<typename F>
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ArgBinder bind( F f ) {
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ArgBinder binder( this, f );
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return binder;
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}
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template<typename F>
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void bindProcessName( F f ) {
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m_boundProcessName = Detail::makeBoundField( f );
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}
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void optUsage( std::ostream& os, std::size_t indent = 0, std::size_t width = CATCH_CONFIG_CONSOLE_WIDTH ) const {
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typename std::vector<Arg>::const_iterator itBegin = m_options.begin(), itEnd = m_options.end(), it;
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std::size_t maxWidth = 0;
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for( it = itBegin; it != itEnd; ++it )
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maxWidth = (std::max)( maxWidth, it->commands().size() );
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for( it = itBegin; it != itEnd; ++it ) {
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Catch::Text usage( it->commands(), Catch::TextAttributes()
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.setWidth( maxWidth+indent )
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.setIndent( indent ) );
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// !TBD handle longer usage strings
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Catch::Text desc( it->description, Catch::TextAttributes()
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.setWidth( width - maxWidth -3 ) );
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for( std::size_t i = 0; i < (std::max)( usage.size(), desc.size() ); ++i ) {
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std::string usageCol = i < usage.size() ? usage[i] : "";
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os << usageCol;
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if( i < desc.size() && !desc[i].empty() )
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os << std::string( indent + 2 + maxWidth - usageCol.size(), ' ' )
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<< desc[i];
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os << "\n";
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}
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}
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}
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std::string optUsage() const {
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std::ostringstream oss;
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optUsage( oss );
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return oss.str();
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}
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void argSynopsis( std::ostream& os ) const {
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for( int i = 1; i <= m_highestSpecifiedArgPosition; ++i ) {
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if( i > 1 )
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os << " ";
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typename std::map<int, Arg>::const_iterator it = m_positionalArgs.find( i );
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if( it != m_positionalArgs.end() )
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os << "<" << it->second.hint << ">";
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else if( m_arg.get() )
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os << "<" << m_arg->hint << ">";
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else
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throw std::logic_error( "non consecutive positional arguments with no floating args" );
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}
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// !TBD No indication of mandatory args
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if( m_arg.get() ) {
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if( m_highestSpecifiedArgPosition > 1 )
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os << " ";
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os << "[<" << m_arg->hint << "> ...]";
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}
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}
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std::string argSynopsis() const {
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std::ostringstream oss;
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argSynopsis( oss );
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return oss.str();
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}
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void usage( std::ostream& os, std::string const& procName ) const {
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os << "usage:\n " << procName << " ";
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argSynopsis( os );
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if( !m_options.empty() ) {
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os << " [options]\n\nwhere options are: \n";
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optUsage( os, 2 );
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}
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os << "\n";
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}
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std::string usage( std::string const& procName ) const {
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std::ostringstream oss;
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usage( oss, procName );
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return oss.str();
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}
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std::vector<Parser::Token> parseInto( int argc, char const * const * argv, ConfigT& config ) const {
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std::string processName = argv[0];
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std::size_t lastSlash = processName.find_last_of( "/\\" );
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if( lastSlash != std::string::npos )
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processName = processName.substr( lastSlash+1 );
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m_boundProcessName.set( config, processName );
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std::vector<Parser::Token> tokens;
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Parser parser;
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parser.parseIntoTokens( argc, argv, tokens );
|
|
return populate( tokens, config );
|
|
}
|
|
|
|
std::vector<Parser::Token> populate( std::vector<Parser::Token> const& tokens, ConfigT& config ) const {
|
|
if( m_options.empty() && m_positionalArgs.empty() )
|
|
throw std::logic_error( "No options or arguments specified" );
|
|
|
|
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.setFlag( config );
|
|
}
|
|
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( 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_arg.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_arg->boundField.set( config, token.data );
|
|
else
|
|
unusedTokens.push_back( token );
|
|
}
|
|
return unusedTokens;
|
|
}
|
|
|
|
private:
|
|
Detail::BoundArgFunction<ConfigT> m_boundProcessName;
|
|
std::vector<Arg> m_options;
|
|
std::map<int, Arg> m_positionalArgs;
|
|
ArgAutoPtr m_arg;
|
|
int m_highestSpecifiedArgPosition;
|
|
bool m_throwOnUnrecognisedTokens;
|
|
};
|
|
|
|
} // end namespace Clara
|
|
|
|
|
|
#endif // TWOBLUECUBES_CLARA_H_INCLUDED
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