annotate cmake/ParseArguments.cmake @ 1015:268d91ee4be6

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author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 02 Sep 2014 15:28:53 +0200
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1 # Parse arguments passed to a function into several lists separated by
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2 # upper-case identifiers and options that do not have an associated list e.g.:
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3 #
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4 # SET(arguments
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5 # hello OPTION3 world
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6 # LIST3 foo bar
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7 # OPTION2
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8 # LIST1 fuz baz
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9 # )
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10 # PARSE_ARGUMENTS(ARG "LIST1;LIST2;LIST3" "OPTION1;OPTION2;OPTION3" ${arguments})
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11 #
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12 # results in 7 distinct variables:
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13 # * ARG_DEFAULT_ARGS: hello;world
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14 # * ARG_LIST1: fuz;baz
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15 # * ARG_LIST2:
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16 # * ARG_LIST3: foo;bar
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17 # * ARG_OPTION1: FALSE
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18 # * ARG_OPTION2: TRUE
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19 # * ARG_OPTION3: TRUE
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20 #
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21 # taken from http://www.cmake.org/Wiki/CMakeMacroParseArguments
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22
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23 MACRO(PARSE_ARGUMENTS prefix arg_names option_names)
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24 SET(DEFAULT_ARGS)
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25 FOREACH(arg_name ${arg_names})
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26 SET(${prefix}_${arg_name})
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27 ENDFOREACH(arg_name)
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28 FOREACH(option ${option_names})
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29 SET(${prefix}_${option} FALSE)
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30 ENDFOREACH(option)
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31
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32 SET(current_arg_name DEFAULT_ARGS)
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33 SET(current_arg_list)
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34 FOREACH(arg ${ARGN})
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35 SET(larg_names ${arg_names})
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36 LIST(FIND larg_names "${arg}" is_arg_name)
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37 IF (is_arg_name GREATER -1)
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38 SET(${prefix}_${current_arg_name} ${current_arg_list})
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39 SET(current_arg_name ${arg})
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40 SET(current_arg_list)
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41 ELSE (is_arg_name GREATER -1)
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42 SET(loption_names ${option_names})
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43 LIST(FIND loption_names "${arg}" is_option)
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44 IF (is_option GREATER -1)
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45 SET(${prefix}_${arg} TRUE)
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46 ELSE (is_option GREATER -1)
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47 SET(current_arg_list ${current_arg_list} ${arg})
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48 ENDIF (is_option GREATER -1)
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49 ENDIF (is_arg_name GREATER -1)
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50 ENDFOREACH(arg)
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51 SET(${prefix}_${current_arg_name} ${current_arg_list})
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52 ENDMACRO(PARSE_ARGUMENTS)

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