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Reporter command line parser errors more eagerly

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- show all “unrecognised option” errors
This commit is contained in:
Phil Nash
2013-12-20 19:06:02 +00:00
parent f385a0b13d
commit 886d9d397c
3 changed files with 35 additions and 23 deletions
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39
include/internal/clara.h
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@@ -371,18 +371,25 @@ namespace Clara {
CommandLine()
: m_boundProcessName( new Detail::NullBinder<ConfigT>() ),
m_highestSpecifiedArgPosition( 0 )
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_highestSpecifiedArgPosition( other.m_highestSpecifiedArgPosition ),
m_throwOnUnrecognisedTokens( other.m_throwOnUnrecognisedTokens )
{
if( other.m_arg.get() )
m_arg = ArgAutoPtr( new Arg( *other.m_arg ) );
}
CommandLine& setThrowOnUnrecognisedTokens( bool shouldThrow = true ) {
m_throwOnUnrecognisedTokens = shouldThrow;
return *this;
}
template<typename F>
ArgBinder bind( F f ) {
ArgBinder binder( this, f );
@@ -488,6 +495,7 @@ namespace Clara {
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();
@@ -499,8 +507,9 @@ namespace Clara {
( token.type == Parser::Token::LongOpt && arg.hasLongName( token.data ) ) ) {
if( arg.takesArg() ) {
if( i == tokens.size()-1 || tokens[i+1].type != Parser::Token::Positional )
throw std::domain_error( "Expected argument to option " + token.data );
arg.boundField.set( config, tokens[++i].data );
errors.push_back( "Expected argument to option: " + token.data );
else
arg.boundField.set( config, tokens[++i].data );
}
else {
arg.boundField.setFlag( config );
@@ -509,11 +518,26 @@ namespace Clara {
}
}
catch( std::exception& ex ) {
throw std::runtime_error( std::string( ex.what() ) + "\n- while parsing: (" + arg.commands() + ")" );
errors.push_back( std::string( ex.what() ) + "\n- while parsing: (" + arg.commands() + ")" );
}
}
if( it == itEnd )
unusedTokens.push_back( token );
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;
}
@@ -552,6 +576,7 @@ namespace Clara {
std::map<int, Arg> m_positionalArgs;
ArgAutoPtr m_arg;
int m_highestSpecifiedArgPosition;
bool m_throwOnUnrecognisedTokens;
};
} // end namespace Clara