CMake/Source/cmListCommand.h

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
#ifndef cmListCommand_h
#define cmListCommand_h
#include "cmCommand.h"
/** \class cmListCommand
* \brief Common list operations
*
*/
class cmListCommand : public cmCommand
{
public:
/**
* This is a virtual constructor for the command.
*/
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virtual cmCommand* Clone()
{
return new cmListCommand;
}
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
virtual bool InitialPass(std::vector<std::string> const& args,
cmExecutionStatus &status);
/**
* This determines if the command is invoked when in script mode.
*/
virtual bool IsScriptable() const { return true; }
/**
* The name of the command as specified in CMakeList.txt.
*/
virtual const char* GetName() const { return "list";}
/**
* Succinct documentation.
*/
virtual const char* GetTerseDocumentation() const
{
return "List operations.";
}
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/**
* More documentation.
*/
virtual const char* GetFullDocumentation() const
{
return
" list(LENGTH <list> <output variable>)\n"
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" list(GET <list> <element index> [<element index> ...]\n"
" <output variable>)\n"
" list(APPEND <list> [<element> ...])\n"
" list(FIND <list> <value> <output variable>)\n"
" list(INSERT <list> <element_index> <element> [<element> ...])\n"
" list(REMOVE_ITEM <list> <value> [<value> ...])\n"
" list(REMOVE_AT <list> <index> [<index> ...])\n"
" list(REMOVE_DUPLICATES <list>)\n"
" list(REVERSE <list>)\n"
" list(SORT <list>)\n"
"LENGTH will return a given list's length.\n"
"GET will return list of elements specified by indices from the list.\n"
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"APPEND will append elements to the list.\n"
"FIND will return the index of the element specified in the list or -1 "
"if it wasn't found.\n"
"INSERT will insert elements to the list to the specified location.\n"
"REMOVE_AT and REMOVE_ITEM will remove items from the list. The "
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"difference is that REMOVE_ITEM will remove the given items, while "
"REMOVE_AT will remove the items at the given indices.\n"
"REMOVE_DUPLICATES will remove duplicated items in the list.\n"
"REVERSE reverses the contents of the list in-place.\n"
"SORT sorts the list in-place alphabetically.\n"
"The list subcommands APPEND, INSERT, REMOVE_AT, REMOVE_ITEM, "
"REMOVE_DUPLICATES, REVERSE and SORT may create new values for "
"the list within the current CMake variable scope. Similar to "
"the SET command, the LIST command creates new variable values "
"in the current scope, even if the list itself is actually "
"defined in a parent scope. To propagate the results of these "
"operations upwards, use SET with PARENT_SCOPE, SET with CACHE "
"INTERNAL, or some other means of value propagation.\n"
"NOTES: A list in cmake is a ; separated group of strings. "
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"To create a list the set command can be used. For example, "
"set(var a b c d e) creates a list with a;b;c;d;e, and "
"set(var \"a b c d e\") creates a string or a list with one "
"item in it.\n"
"When specifying index values, if <element index> is 0 or"
" greater, it is indexed from the "
"beginning of the list, with 0 representing the first list element. "
"If <element index> is -1 or lesser, it is indexed from the end of "
"the list, with -1 representing the last list element. Be careful "
"when counting with negative indices: they do not start from 0. "
"-0 is equivalent to 0, the first list element.\n"
;
}
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cmTypeMacro(cmListCommand, cmCommand);
protected:
bool HandleLengthCommand(std::vector<std::string> const& args);
bool HandleGetCommand(std::vector<std::string> const& args);
bool HandleAppendCommand(std::vector<std::string> const& args);
bool HandleFindCommand(std::vector<std::string> const& args);
bool HandleInsertCommand(std::vector<std::string> const& args);
bool HandleRemoveAtCommand(std::vector<std::string> const& args);
bool HandleRemoveItemCommand(std::vector<std::string> const& args);
bool HandleRemoveDuplicatesCommand(std::vector<std::string> const& args);
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bool HandleSortCommand(std::vector<std::string> const& args);
bool HandleReverseCommand(std::vector<std::string> const& args);
bool GetList(std::vector<std::string>& list, const char* var);
bool GetListString(std::string& listString, const char* var);
};
#endif