Parse command-line arguments. More...

#include "command-line.h"

Collaboration diagram for ns3::CommandLine:

Classes
class	CallbackItem
	An argument Item using a Callback to parse the input. More...

class	CharStarItem
	Extension of Item for `char*`. More...

class	Item
	The argument abstract base class. More...

class	StringItem
	Extension of Item for extra non-options, stored as strings. More...

class	UserItem
	An argument Item assigning to POD. More...

Public Types
typedef bool(*	Callback) (const std::string &value)
	Callback function signature for AddValue(const std::string&,const std::string&,Callback<bool,const std::string>).

Public Member Functions
	CommandLine ()
	Constructor.

	CommandLine (const CommandLine &cmd)
	Copy constructor.

	CommandLine (const std::string &filename)
	Construct and register the source file name.

	~CommandLine ()
	Destructor.

template<typename T >
void	AddNonOption (const std::string &name, const std::string &help, T &value)
	Add a non-option argument, assigning to POD.

void	AddValue (const std::string &name, const std::string &attributePath)
	Add a program argument as a shorthand for an Attribute.

void	AddValue (const std::string &name, const std::string &help, char *value, std::size_t num)
	Retrieve the `char` in `char` and add it as a program argument.

void	AddValue (const std::string &name, const std::string &help, ns3::Callback< bool, const std::string & > callback, const std::string &defaultValue="")
	Add a program argument, using a Callback to parse the value.

template<typename T >
void	AddValue (const std::string &name, const std::string &help, T &value)
	Add a program argument, assigning to POD.

std::string	GetExtraNonOption (std::size_t i) const
	Get extra non-option arguments by index.

std::string	GetName () const
	Get the program name.

std::size_t	GetNExtraNonOptions () const
	Get the total number of non-option arguments found, including those configured with AddNonOption() and extra non-option arguments.

std::string	GetVersion () const
	Get the program version.

CommandLine &	operator= (const CommandLine &cmd)
	Assignment.

void	Parse (int argc, char *argv[])
	Parse the program arguments.

void	Parse (std::vector< std::string > args)
	Parse the program arguments.

void	PrintHelp (std::ostream &os) const
	Print program usage to the desired output stream.

void	PrintVersion (std::ostream &os) const
	Print ns-3 version to the desired output stream.

void	Usage (const std::string &usage)
	Supply the program usage and documentation.

Private Types
using	HasOptionName = std::tuple<bool, std::string, std::string>
	Tuple type returned by GetOptionName().

using	Items = std::vector<std::shared_ptr<Item>>
	Argument list container.

Private Member Functions
void	Clear ()
	Remove all arguments, Usage(), name.

void	Copy (const CommandLine &cmd)
	Copy constructor implementation.

HasOptionName	GetOptionName (const std::string &param) const
	Strip leading `--` or `-` from options.

bool	HandleArgument (const std::string &name, const std::string &value) const
	Match name against the program or general arguments, and dispatch to the appropriate handler.

void	HandleHardOptions (const std::vector< std::string > &args) const
	Handle hard-coded options.

bool	HandleNonOption (const std::string &value)
	Handle a non-option.

bool	HandleOption (const std::string &param) const
	Handle an option in the form `param=value`.

void	PrintAttributeList (std::ostream &os, const TypeId tid, std::stringstream &header) const
	Print the Attributes for a single type.

void	PrintAttributes (std::ostream &os, const std::string &type) const
	Handler for `--PrintAttributes:` print the attributes for a given type as well as its parents.

void	PrintDoxygenUsage () const
	Append usage message in Doxygen format to the file indicated by the NS_COMMANDLINE_INTROSPECTION environment variable.

void	PrintGlobals (std::ostream &os) const
	Handler for `--PrintGlobals:` print all global variables and values.

void	PrintGroup (std::ostream &os, const std::string &group) const
	Handler for `--PrintGroup:` print all types belonging to a given group.

void	PrintGroups (std::ostream &os) const
	Handler for `--PrintGroups:` print all TypeId group names.

void	PrintTypeIds (std::ostream &os) const
	Handler for `--PrintTypeIds:` print all TypeId names.

Static Private Member Functions
static bool	HandleAttribute (const std::string &name, const std::string &value)
	Callback function to handle attributes.

Private Attributes
std::size_t	m_NNonOptions
	The expected number of non-option arguments.

std::size_t	m_nonOptionCount
	The number of actual non-option arguments seen so far.

Items	m_nonOptions
	The list of non-option arguments.

Items	m_options
	The list of option arguments.

std::string	m_shortName
	The source file name (without `.cc`), as would be given to `ns3 run`

std::string	m_usage
	The Usage string.

Detailed Description

Parse command-line arguments.

Instances of this class can be used to parse command-line arguments. Programs can register a general usage message with CommandLine::Usage, and arguments with CommandLine::AddValue. Argument variable types with input streamers (operator>>) can be set directly; more complex argument parsing can be accomplished by providing a Callback.

CommandLine also provides handlers for these standard arguments:

  --PrintGlobals:              Print the list of globals.
  --PrintGroups:               Print the list of groups.
  --PrintGroup=[group]:        Print all TypeIds of group.
  --PrintTypeIds:              Print all TypeIds.
  --PrintAttributes=[typeid]:  Print all attributes of typeid.
  --PrintVersion:              Print the ns-3 version.
  --PrintHelp:                 Print this help message.

The more common --version is a synonym for --PrintVersion.

The more common --help is a synonym for --PrintHelp; an example is given below.

CommandLine can also handle non-option arguments (often called simply "positional" parameters: arguments which don't begin with "-" or "--"). These can be parsed directly in to variables, by registering arguments with AddNonOption in the order expected. Additional non-option arguments encountered will be captured as strings.

Finally, CommandLine processes Attribute and GlobalValue arguments. Default values for specific attributes can be set using a shorthand argument name.

In use, arguments are given in the form

  --arg=value --toggle first-non-option

Most arguments expect a value, as in the first form, --arg=value. Toggles, corresponding to boolean arguments, can be given in any of the forms

  --toggle1 --toggle2=1 --toggle3=t --toggle4=true

The first form changes the state of toggle1 from its default; all the rest set the corresponding boolean variable to true. 0, f and false are accepted to set the variable to false. Option arguments can appear in any order on the command line, even intermixed with non-option arguments. The order of non-option arguments is preserved.

Option arguments can be repeated on the command line; the last value given will be the final value used. For example,

  --arg=one --toggle=f --arg=another --toggle

The variable set by --arg will end up with the value "another"; the boolean set by --toggle will end up as true.

Because arguments can be repeated it can be hard to decipher what value each variable ended up with, especially when using boolean toggles. Suggested best practice is for scripts to report the values of all items settable through CommandLine, as done by the example below.

CommandLine can set the initial value of every attribute in the system with the --TypeIdName::AttributeName=value syntax, for example

  --Application::StartTime=3s

In some cases you may want to highlight the use of a particular attribute for a simulation script. For example, you might want to make it easy to set the Application::StartTime using the argument --start, and have its help string show as part of the help message. This can be done using the AddValue (name, attributePath) method.

CommandLine can also set the value of every GlobalValue in the system with the --GlobalValueName=value syntax, for example

  --SchedulerType=HeapScheduler

A simple example of CommandLine is in src/core/example/command-line-example.cc See that file for an example of handling non-option arguments.

The heart of that example is this code:

int         intArg  = 1;
bool        boolArg = false;
std::string strArg  = "strArg default";
 
CommandLine cmd (__FILE__);
cmd.Usage ("CommandLine example program.\n"
           "\n"
           "This little program demonstrates how to use CommandLine.");
cmd.AddValue ("intArg",  "an int argument",       intArg);
cmd.AddValue ("boolArg", "a bool argument",       boolArg);
cmd.AddValue ("strArg",  "a string argument",     strArg);
cmd.AddValue ("anti",    "ns3::RandomVariableStream::Antithetic");
cmd.AddValue ("cbArg",   "a string via callback", MakeCallback (SetCbArg));
cmd.Parse (argc, argv);

after which it prints the values of each variable. (The SetCbArg function is not shown here; see src/core/example/command-line-example.cc)

Here is the output from a few runs of that program:

  $ ./ns3 run "command-line-example"
  intArg:   1
  boolArg:  false
  strArg:   "strArg default"
  cbArg:    "cbArg default"

  $ ./ns3 run "command-line-example --intArg=2 --boolArg --strArg=Hello --cbArg=World"
  intArg:   2
  boolArg:  true
  strArg:   "Hello"
  cbArg:    "World"

  $ ./ns3 run "command-line-example --help"
  ns3-dev-command-line-example-debug [Program Arguments] [General Arguments]

  CommandLine example program.

  This little program demonstrates how to use CommandLine.

  Program Arguments:
      --intArg:   an int argument [1]
      --boolArg:  a bool argument [false]
      --strArg:   a string argument [strArg default]
      --anti:     Set this RNG stream to generate antithetic values
(ns3::RandomVariableStream::Antithetic) [false]
      --cbArg:    a string via callback

  General Arguments:
      --PrintGlobals:              Print the list of globals.
      --PrintGroups:               Print the list of groups.
      --PrintGroup=[group]:        Print all TypeIds of group.
      --PrintTypeIds:              Print all TypeIds.
      --PrintAttributes=[typeid]:  Print all attributes of typeid.
      --PrintVersion:              Print the ns-3 version.
      --PrintHelp:                 Print this help message.

Having parsed the arguments, some programs will need to perform some additional validation of the received values. A common issue at this point is to discover that the supplied arguments are incomplete or incompatible. Suggested best practice is to supply an error message and the complete usage message. For example,

int value1;
int value2;
 
CommandLine cmd (__FILE__);
cmd.Usage ("...");
cmd.AddValue ("value1", "first value", value1);
cmd.AddValue ("value2", "second value", value1);
 
cmd.Parse (argc, argv);
 
if (value1 * value2 < 0)
  {
    std::cerr << "value1 and value2 must have the same sign!" << std::endl;
    std::cerr << cmd;
    exit (-1);
  }

Finally, note that for examples which will be run by test.py the preferred declaration of a CommandLine instance is

CommandLine cmd (__FILE__);

This will ensure that the program usage and arguments can be added to the Doxygen documentation automatically.

Definition at line 220 of file command-line.h.

Member Typedef Documentation

◆ Callback

typedef bool(* ns3::CommandLine::Callback) (const std::string &value)

Callback function signature for AddValue(const std::string&,const std::string&,Callback<bool,const std::string>).

Parameters

[in] value The argument value.

Definition at line 298 of file command-line.h.

◆ HasOptionName

using ns3::CommandLine::HasOptionName = std::tuple<bool, std::string, std::string>

private

Tuple type returned by GetOptionName().

Field	Meaning
`get<0>`	Is this an option (beginning with `-`)?
`get<1>`	The option name (after any `-`, before `=`)
`get<2>`	The value (after any `=`)

Definition at line 538 of file command-line.h.

◆ Items

using ns3::CommandLine::Items = std::vector<std::shared_ptr<Item>>

private

Argument list container.

Definition at line 646 of file command-line.h.

Constructor & Destructor Documentation

◆ CommandLine() [1/3]

ns3::CommandLine::CommandLine ( )

Constructor.

Definition at line 100 of file command-line.cc.

References NS_LOG_FUNCTION.

◆ CommandLine() [2/3]

ns3::CommandLine::CommandLine ( const std::string & filename )

Construct and register the source file name.

This would typically be called by CommandLine cmd (FILE);

This form is required to generate Doxygen documentation of the arguments and options.

Parameters

[in] filename The source file name.

Definition at line 109 of file command-line.cc.

References m_shortName, NS_LOG_FUNCTION, and ns3::SystemPath::Split().

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◆ CommandLine() [3/3]

ns3::CommandLine::CommandLine ( const CommandLine & cmd )

Copy constructor.

Parameters

[in] cmd The CommandLine to copy from

Definition at line 120 of file command-line.cc.

References Copy().

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◆ ~CommandLine()

ns3::CommandLine::~CommandLine ( )

Destructor.

Definition at line 133 of file command-line.cc.

References Clear(), and NS_LOG_FUNCTION.

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Member Function Documentation

◆ AddNonOption()

template<typename T >

void ns3::CommandLine::AddNonOption	(	const std::string &	name,
		const std::string &	help,
		T &	value )

Add a non-option argument, assigning to POD.

Parameters

[in]	name	The name of the program-supplied argument
[in]	help	The help text used by `--PrintHelp`
[out]	value	A reference to the variable where the value parsed will be stored (if no value is parsed, this variable is not modified).

Definition at line 752 of file command-line.h.

References m_NNonOptions, and m_nonOptions.

◆ AddValue() [1/4]

void ns3::CommandLine::AddValue	(	const std::string &	name,
		const std::string &	attributePath )

Add a program argument as a shorthand for an Attribute.

Parameters

[in]	name	The name of the program-supplied argument.
[out]	attributePath	The fully-qualified name of the Attribute

Definition at line 767 of file command-line.cc.

References AddValue(), ns3::TypeId::AttributeInformation::checker, HandleAttribute(), ns3::TypeId::AttributeInformation::help, ns3::TypeId::AttributeInformation::initialValue, ns3::TypeId::LookupAttributeByName(), ns3::TypeId::LookupByNameFailSafe(), ns3::MakeBoundCallback(), NS_FATAL_ERROR, NS_LOG_DEBUG, and NS_LOG_FUNCTION.

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◆ AddValue() [2/4]

void ns3::CommandLine::AddValue	(	const std::string &	name,
		const std::string &	help,
		char *	value,
		std::size_t	num )

Retrieve the char* in char* and add it as a program argument.

This variant it used to receive C string pointers from the python bindings.

The C string result stored in value will be null-terminated, and have a maximum length of (num - 1). The result will be truncated to fit, if necessary.

Parameters

[in]	name	The name of the program-supplied argument
[in]	help	The help text used by `--PrintHelp`
[out]	value	A pointer pointing to the beginning of a null-terminated C string buffer provided by the caller. The parsed value will be stored in that buffer (if no value is parsed, this variable is not modified).
	num	The size of the buffer pointed to by `value`, including any terminating null.

Definition at line 735 of file command-line.cc.

References m_options, and NS_LOG_FUNCTION.

◆ AddValue() [3/4]

void ns3::CommandLine::AddValue	(	const std::string &	name,
		const std::string &	help,
		ns3::Callback< bool, const std::string & >	callback,
		const std::string &	defaultValue = "" )

Add a program argument, using a Callback to parse the value.

Parameters

[in]	name	The name of the program-supplied argument
[in]	help	The help text used by `--help`
[in]	callback	A Callback function that will be invoked to parse and store the value.
[in]	defaultValue	Optional default value for argument.

The callback should have the signature CommandLine::Callback

Definition at line 751 of file command-line.cc.

References m_options, and NS_LOG_FUNCTION.

◆ AddValue() [4/4]

template<typename T >

void ns3::CommandLine::AddValue	(	const std::string &	name,
		const std::string &	help,
		T &	value )

Add a program argument, assigning to POD.

Parameters

[in]	name	The name of the program-supplied argument
[in]	help	The help text used by `--PrintHelp`
[out]	value	A reference to the variable where the value parsed will be stored (if no value is parsed, this variable is not modified).

Definition at line 736 of file command-line.h.

References m_options.

Referenced by AddValue().

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◆ Clear()

void ns3::CommandLine::Clear ( )

private

Remove all arguments, Usage(), name.

Definition at line 154 of file command-line.cc.

References m_NNonOptions, m_nonOptions, m_options, m_shortName, m_usage, and NS_LOG_FUNCTION.

Referenced by ~CommandLine(), and operator=().

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◆ Copy()

void ns3::CommandLine::Copy ( const CommandLine & cmd )

private

Copy constructor implementation.

Parameters

[in] cmd CommandLine to copy

Definition at line 140 of file command-line.cc.

References m_NNonOptions, m_nonOptionCount, m_nonOptions, m_options, m_shortName, m_usage, and NS_LOG_FUNCTION.

Referenced by CommandLine(), and operator=().

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◆ GetExtraNonOption()

std::string ns3::CommandLine::GetExtraNonOption ( std::size_t i ) const

Get extra non-option arguments by index.

This allows CommandLine to accept more non-option arguments than have been configured explicitly with AddNonOption().

This is only valid after calling Parse().

Parameters

[in] i The index of the non-option argument to return.

Returns: The i'th non-option argument, as a string.

Definition at line 796 of file command-line.cc.

References m_NNonOptions, and m_nonOptions.

◆ GetName()

std::string ns3::CommandLine::GetName ( ) const

Get the program name.

Returns: The program name. Only valid after calling Parse()

Definition at line 172 of file command-line.cc.

References m_shortName.

◆ GetNExtraNonOptions()

std::size_t ns3::CommandLine::GetNExtraNonOptions ( ) const

Get the total number of non-option arguments found, including those configured with AddNonOption() and extra non-option arguments.

This is only valid after calling Parse().

Returns: the number of non-option arguments found.

Definition at line 812 of file command-line.cc.

References m_NNonOptions, and m_nonOptions.

◆ GetOptionName()

CommandLine::HasOptionName ns3::CommandLine::GetOptionName ( const std::string & param ) const

private

Strip leading -- or - from options.

Parameters

[in] param Option name to search

Returns: false if none found, indicating this is a non-option.

Definition at line 220 of file command-line.cc.

Referenced by HandleHardOptions(), and HandleOption().

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◆ GetVersion()

std::string ns3::CommandLine::GetVersion ( ) const

Get the program version.

Returns: The program version

Definition at line 434 of file command-line.cc.

References ns3::Version::LongVersion().

Referenced by PrintVersion().

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◆ HandleArgument()

bool ns3::CommandLine::HandleArgument	(	const std::string &	name,
		const std::string &	value ) const

private

Match name against the program or general arguments, and dispatch to the appropriate handler.

Parameters

[in]	name	The argument name
[in]	value	The command line value

Returns: true if the argument was handled successfully

Definition at line 677 of file command-line.cc.

References HandleAttribute(), m_options, NS_LOG_DEBUG, NS_LOG_FUNCTION, and PrintHelp().

Referenced by HandleOption().

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◆ HandleAttribute()

bool ns3::CommandLine::HandleAttribute	(	const std::string &	name,
		const std::string &	value )

staticprivate

Callback function to handle attributes.

Parameters

[in]	name	The full name of the Attribute.
[in]	value	The value to assign to name .

Returns: true if the value was set successfully, false otherwise.

Definition at line 826 of file command-line.cc.

References ns3::Config::SetDefaultFailSafe(), and ns3::Config::SetGlobalFailSafe().

Referenced by AddValue(), and HandleArgument().

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◆ HandleHardOptions()

void ns3::CommandLine::HandleHardOptions ( const std::vector< std::string > & args ) const

private

Handle hard-coded options.

Note: : if any hard-coded options are found this function exits.

Parameters

[in] args Vector of hard-coded options to handle.

Definition at line 262 of file command-line.cc.

References GetOptionName(), NS_LOG_FUNCTION, PrintAttributes(), PrintGlobals(), PrintGroup(), PrintGroups(), PrintHelp(), PrintTypeIds(), and PrintVersion().

Referenced by Parse().

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◆ HandleNonOption()

bool ns3::CommandLine::HandleNonOption ( const std::string & value )

private

Handle a non-option.

Parameters

[in] value The command line non-option value.

Returns: true if value could be parsed correctly.

Definition at line 335 of file command-line.cc.

References m_nonOptionCount, m_nonOptions, NS_LOG_FUNCTION, NS_LOG_LOGIC, and PrintHelp().

Referenced by Parse().

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◆ HandleOption()

bool ns3::CommandLine::HandleOption ( const std::string & param ) const

private

Handle an option in the form param=value.

Parameters

[in] param The option string.

Returns: true if this was really an option.

Definition at line 321 of file command-line.cc.

References GetOptionName(), and HandleArgument().

Referenced by Parse().

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◆ operator=()

CommandLine & ns3::CommandLine::operator= ( const CommandLine & cmd )

Assignment.

Parameters

[in] cmd The CommandLine to assign from

Returns: The CommandLine

Definition at line 126 of file command-line.cc.

References Clear(), and Copy().

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◆ Parse() [1/2]

void ns3::CommandLine::Parse	(	int	argc,
		char *	argv[] )

Parse the program arguments.

Parameters

[in]	argc	The 'argc' variable: number of arguments (including the main program name as first element).
[in]	argv	The 'argv' variable: a null-terminated array of strings, each of which identifies a command-line argument.

Obviously, this method will parse the input command-line arguments and will attempt to handle them all.

As a side effect, this method saves the program basename, which can be retrieved by GetName().

Definition at line 364 of file command-line.cc.

References NS_LOG_FUNCTION, and Parse().

Referenced by Parse().

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◆ Parse() [2/2]

void ns3::CommandLine::Parse ( std::vector< std::string > args )

Parse the program arguments.

This version may be convenient when synthesizing arguments programmatically. Other than the type of argument this behaves identically to Parse(int, char *)

Parameters

[in] args The vector of arguments.

Definition at line 183 of file command-line.cc.

References ns3::Singleton< DesMetrics >::Get(), HandleHardOptions(), HandleNonOption(), HandleOption(), ns3::DesMetrics::Initialize(), m_nonOptionCount, NS_ASSERT_MSG, NS_LOG_FUNCTION, and PrintDoxygenUsage().

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◆ PrintAttributeList()

void ns3::CommandLine::PrintAttributeList	(	std::ostream &	os,
		const TypeId	tid,
		std::stringstream &	header ) const

private

Print the Attributes for a single type.

Parameters

[in,out]	os	the output stream.
[in]	tid	The TypeId whose Attributes should be displayed,
[in]	header	A header line to print if `tid` has Attributes

Definition at line 548 of file command-line.cc.

References ns3::TypeId::AttributeInformation::checker, ns3::TypeId::GetAttribute(), ns3::TypeId::GetAttributeFullName(), ns3::TypeId::GetAttributeN(), ns3::TypeId::AttributeInformation::help, ns3::TypeId::AttributeInformation::initialValue, and NS_LOG_FUNCTION.

Referenced by PrintAttributes().

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◆ PrintAttributes()

void ns3::CommandLine::PrintAttributes	(	std::ostream &	os,
		const std::string &	type ) const

private

Handler for --PrintAttributes: print the attributes for a given type as well as its parents.

Parameters

[in,out]	os	the output stream.
[in]	type	The type name whose Attributes should be displayed,

Definition at line 577 of file command-line.cc.

References ns3::TypeId::GetName(), ns3::TypeId::GetParent(), ns3::TypeId::LookupByNameFailSafe(), NS_FATAL_ERROR, NS_LOG_FUNCTION, and PrintAttributeList().

Referenced by HandleHardOptions().

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◆ PrintDoxygenUsage()

void ns3::CommandLine::PrintDoxygenUsage ( ) const

private

Append usage message in Doxygen format to the file indicated by the NS_COMMANDLINE_INTROSPECTION environment variable.

This is typically only called once, by Parse().

Definition at line 451 of file command-line.cc.

References ns3::SystemPath::Append(), ns3::EnvironmentVariable::Get(), m_NNonOptions, m_nonOptions, m_options, m_shortName, m_usage, NS_FATAL_ERROR, NS_LOG_FUNCTION, and NS_LOG_INFO.

Referenced by Parse().

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◆ PrintGlobals()

void ns3::CommandLine::PrintGlobals ( std::ostream & os ) const

private

Handler for --PrintGlobals: print all global variables and values.

Parameters

[in,out] os The output stream to print on.

Definition at line 520 of file command-line.cc.

References ns3::GlobalValue::Begin(), ns3::GlobalValue::End(), ns3::StringValue::Get(), and NS_LOG_FUNCTION.

Referenced by HandleHardOptions().

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◆ PrintGroup()

void ns3::CommandLine::PrintGroup	(	std::ostream &	os,
		const std::string &	group ) const

private

Handler for --PrintGroup: print all types belonging to a given group.

Parameters

[in,out]	os	The output stream.
[in]	group	The name of the TypeId group to display

Definition at line 607 of file command-line.cc.

References ns3::TypeId::GetGroupName(), ns3::TypeId::GetName(), ns3::TypeId::GetRegistered(), ns3::TypeId::GetRegisteredN(), and NS_LOG_FUNCTION.

Referenced by HandleHardOptions().

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◆ PrintGroups()

void ns3::CommandLine::PrintGroups ( std::ostream & os ) const

private

Handler for --PrintGroups: print all TypeId group names.

Parameters

[in,out] os The output stream.

Definition at line 657 of file command-line.cc.

References ns3::TypeId::GetGroupName(), ns3::TypeId::GetRegistered(), ns3::TypeId::GetRegisteredN(), and NS_LOG_FUNCTION.

Referenced by HandleHardOptions().

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◆ PrintHelp()

void ns3::CommandLine::PrintHelp ( std::ostream & os ) const

Print program usage to the desired output stream.

Handler for --PrintHelp and --help: print Usage(), argument names, and help strings

Alternatively, an overloaded operator << can be used:

  CommandLine cmd (__FILE__);
  cmd.Parse (argc, argv);
...
 
  std::cerr << cmd;

Parameters

[in,out] os The output stream to print on.

Definition at line 372 of file command-line.cc.

References m_NNonOptions, m_nonOptions, m_options, m_shortName, m_usage, and NS_LOG_FUNCTION.

Referenced by HandleArgument(), HandleHardOptions(), and HandleNonOption().

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◆ PrintTypeIds()

void ns3::CommandLine::PrintTypeIds ( std::ostream & os ) const

private

Handler for --PrintTypeIds: print all TypeId names.

Parameters

[in,out] os The output stream.

Definition at line 634 of file command-line.cc.

References ns3::TypeId::GetName(), ns3::TypeId::GetRegistered(), ns3::TypeId::GetRegisteredN(), and NS_LOG_FUNCTION.

Referenced by HandleHardOptions().

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◆ PrintVersion()

void ns3::CommandLine::PrintVersion ( std::ostream & os ) const

Print ns-3 version to the desired output stream.

Handler for --PrintVersion and --version.

Parameters

[in,out] os The output stream to print on.

Definition at line 445 of file command-line.cc.

References GetVersion().

Referenced by HandleHardOptions().

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◆ Usage()

void ns3::CommandLine::Usage ( const std::string & usage )

Supply the program usage and documentation.

Parameters

[in] usage Program usage message to write with --help.

Definition at line 166 of file command-line.cc.

References m_usage.

Member Data Documentation

◆ m_NNonOptions

std::size_t ns3::CommandLine::m_NNonOptions

private

The expected number of non-option arguments.

Definition at line 654 of file command-line.h.

Referenced by AddNonOption(), Clear(), Copy(), GetExtraNonOption(), GetNExtraNonOptions(), PrintDoxygenUsage(), and PrintHelp().

◆ m_nonOptionCount

std::size_t ns3::CommandLine::m_nonOptionCount

private

The number of actual non-option arguments seen so far.

Definition at line 656 of file command-line.h.

Referenced by Copy(), HandleNonOption(), and Parse().

◆ m_nonOptions

Items ns3::CommandLine::m_nonOptions

private

The list of non-option arguments.

Definition at line 651 of file command-line.h.

Referenced by AddNonOption(), Clear(), Copy(), GetExtraNonOption(), GetNExtraNonOptions(), HandleNonOption(), PrintDoxygenUsage(), and PrintHelp().

◆ m_options

Items ns3::CommandLine::m_options

private

The list of option arguments.

Definition at line 649 of file command-line.h.

Referenced by AddValue(), AddValue(), AddValue(), Clear(), Copy(), HandleArgument(), PrintDoxygenUsage(), and PrintHelp().

◆ m_shortName

std::string ns3::CommandLine::m_shortName

private

The source file name (without .cc), as would be given to ns3 run

Definition at line 660 of file command-line.h.

Referenced by CommandLine(), Clear(), Copy(), GetName(), PrintDoxygenUsage(), and PrintHelp().

◆ m_usage

std::string ns3::CommandLine::m_usage

private

The Usage string.

Definition at line 658 of file command-line.h.

Referenced by Clear(), Copy(), PrintDoxygenUsage(), PrintHelp(), and Usage().

The documentation for this class was generated from the following files:

src/core/model/command-line.h
src/core/model/command-line.cc

Classes

Public Types

Public Member Functions

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ Callback

◆ HasOptionName

◆ Items

Constructor & Destructor Documentation

◆ CommandLine() [1/3]

◆ CommandLine() [2/3]

◆ CommandLine() [3/3]

◆ ~CommandLine()

Member Function Documentation

◆ AddNonOption()

◆ AddValue() [1/4]

◆ AddValue() [2/4]

◆ AddValue() [3/4]

◆ AddValue() [4/4]

◆ Clear()

◆ Copy()

◆ GetExtraNonOption()

◆ GetName()

◆ GetNExtraNonOptions()

◆ GetOptionName()

◆ GetVersion()

◆ HandleArgument()

◆ HandleAttribute()

◆ HandleHardOptions()

◆ HandleNonOption()

◆ HandleOption()

◆ operator=()

◆ Parse() [1/2]

◆ Parse() [2/2]

◆ PrintAttributeList()

◆ PrintAttributes()

◆ PrintDoxygenUsage()

◆ PrintGlobals()

◆ PrintGroup()

◆ PrintGroups()

◆ PrintHelp()

◆ PrintTypeIds()

◆ PrintVersion()

◆ Usage()

Member Data Documentation

◆ m_NNonOptions

◆ m_nonOptionCount

◆ m_nonOptions

◆ m_options

◆ m_shortName

◆ m_usage