include ("${RunCMake_SOURCE_DIR}/check_errors.cmake")
unset (errors)

set(listvar alpha bravo charlie delta)

list(TRANSFORM listvar PREPEND "P_" OUTPUT_VARIABLE reference)
set (output "$<LIST:TRANSFORM,alpha;bravo;charlie;delta,PREPEND,P_>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

list(TRANSFORM listvar PREPEND "P_" AT 1 3 OUTPUT_VARIABLE reference)
set (output "$<LIST:TRANSFORM,alpha;bravo;charlie;delta,PREPEND,P_,AT,1,3>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

list(TRANSFORM listvar PREPEND "P_" AT 1 -2 OUTPUT_VARIABLE reference)
set (output "$<LIST:TRANSFORM,alpha;bravo;charlie;delta,PREPEND,P_,AT,1,-2>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

list(TRANSFORM listvar PREPEND "P_" FOR 1 2 OUTPUT_VARIABLE reference)
set (output "$<LIST:TRANSFORM,alpha;bravo;charlie;delta,PREPEND,P_,FOR,1,2>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

list(TRANSFORM listvar PREPEND "P_" FOR 1 -1 OUTPUT_VARIABLE reference)
set (output "$<LIST:TRANSFORM,alpha;bravo;charlie;delta,PREPEND,P_,FOR,1,-1>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

list(TRANSFORM listvar PREPEND "P_" FOR 1 -1 2 OUTPUT_VARIABLE reference)
set (output "$<LIST:TRANSFORM,alpha;bravo;charlie;delta,PREPEND,P_,FOR,1,-1,2>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()

list(TRANSFORM listvar PREPEND "P_" REGEX "(r|t)a" OUTPUT_VARIABLE reference)
set (output "$<LIST:TRANSFORM,alpha;bravo;charlie;delta,PREPEND,P_,REGEX,(r|t)a>")
if (NOT output STREQUAL reference)
  list (APPEND errors "returns bad value: ${output}")
endif()


check_errors("LIST:TRANSFORM,PREPEND..." ${errors})