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# This file contains functions used to generate a list of macros that are used
# to create fixed-size typelists. See vtkTypeList for details.
# Concatenates a list of strings into a single string, since string(CONCAT ...)
# is not currently available for VTK's cmake version.
# Internal method.
function(CollapseString input output)
set(temp "")
foreach(line ${input})
set(temp ${temp}${line})
endforeach()
set(${output} "${temp}" PARENT_SCOPE)
endfunction()
# Create list of numbers, start to end _inclusive_, storing the list in result.
# Internal method
function(CreateTypeListMacros_range start end result)
set(temp)
set(i ${start})
while(i LESS end OR i EQUAL end)
list(APPEND temp ${i})
math(EXPR i "${i} + 1")
endwhile()
set(${result} ${temp} PARENT_SCOPE)
endfunction()
# Creates a macro for case n = 1
# Internal method
function(CreateTypeListMacros_create_macro_1 macroPrefix typeList nullType result)
set(temp
"#define ${macroPrefix}_1(t1) \\\n"
" ${typeList}<t1, ${nullType} >\n"
)
CollapseString("${temp}" temp)
set(${result} ${temp} PARENT_SCOPE)
endfunction()
# Creates a macro for case ${num}, where ${num} > 1
# Internal method
function(CreateTypeListMacros_create_macro num macroPrefix typeList nullType result)
set(nums)
CreateTypeListMacros_range(2 ${num} nums)
math(EXPR lastNum "${num} - 1")
set(decl "#define ${macroPrefix}_${num}")
set(macroArgs "t1")
set(lastMacroArgs "")
set(delim "")
foreach(i ${nums})
set(macroArgs "${macroArgs}, t${i}")
set(lastMacroArgs "${lastMacroArgs}${delim}t${i}")
set(delim ", ")
endforeach()
set(temp
"${decl}(${macroArgs}) \\\n"
" ${typeList}<t1, \\\n"
" ${macroPrefix}_${lastNum}(${lastMacroArgs}) >\n"
)
CollapseString("${temp}" temp)
set(${result} ${temp} PARENT_SCOPE)
endfunction()
# This function generates a header file that generates TypeList creator macros.
#
# Usage:
# HEADER = output string variable that will contain the complete header.
# MAX_SIZE = largest typelist macro to create.
# MACRO_PREFIX = prefix to use for macro names
# TYPELIST_T = type for TypeList implementation
# NULLTYPE_T = type for NullType implementation
#
# The output is generated to look like:
#
# #define ${MACRO_PREFIX}_1(t1) \
# ${TYPELIST_T}<t1, ${NULLTYPE_T} >
# #define ${MACRO_PREFIX}_2(t1, t2) \
# ${TYPELIST_T}<t1, \
# ${MACRO_PREFIX}_1(t2)
# #define ${MACRO_PREFIX}_3(t1, t2, t3) \
# ${TYPELIST_T}<t1, \
# ${MACRO_PREFIX}_2(t2, t3)
# And so on, up to ${MACRO_PREFIX}_${MAX_SIZE}.
function(CreateTypeListMacros HEADER MAX_SIZE MACRO_PREFIX TYPELIST_T
NULLTYPE_T)
set(temp "")
set(result
"// This file is autogenerated by vtkCreateTypeListMacros.cmake.\n"
"// Do not edit this file, your changes will not be saved.\n"
"\n"
"#ifndef vtkTypeListMacros_h\n"
"#define vtkTypeListMacros_h\n"
"\n"
"#include \"vtkTypeList.h\"\n"
"\n"
)
set(nums "")
CreateTypeListMacros_range(2 ${MAX_SIZE} nums)
CreateTypeListMacros_create_macro_1(
"${MACRO_PREFIX}"
"${TYPELIST_T}"
"${NULLTYPE_T}"
temp
)
list(APPEND result ${temp})
foreach(num ${nums})
CreateTypeListMacros_create_macro(
"${num}"
"${MACRO_PREFIX}"
"${TYPELIST_T}"
"${NULLTYPE_T}"
temp
)
list(APPEND result ${temp})
endforeach()
list(APPEND result "\n#endif // vtkTypeListMacros_h")
CollapseString("${result}" result)
set(${HEADER} "${result}" PARENT_SCOPE)
endfunction()
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