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# Match the pattern 'regex' in 'input_line', replace the match with 'replacement'
# and set that result in 'out_var' in the parent scope.
function(qt_regex_match_and_get input_line regex replacement out_var)
string(REGEX MATCH "${regex}" match "${input_line}")
if(match)
string(REGEX REPLACE "${regex}" "${replacement}" match "${input_line}")
string(STRIP ${match} match)
set(${out_var} "${match}" PARENT_SCOPE)
endif()
endfunction()
# Match 'regex' in a list of lines. When found, set the value to 'out_var' and break early.
function(qt_qlalr_find_option_in_list input_list regex out_var)
foreach(line ${input_list})
qt_regex_match_and_get("${line}" "${regex}" "\\1" option)
if(option)
string(TOLOWER ${option} option)
set(${out_var} "${option}" PARENT_SCOPE)
return()
endif()
endforeach()
message(FATAL_ERROR "qt_qlalr_find_option_in_list: Could not extract ${out_var}")
endfunction()
# Generate a few output files using qlalr, and assign those to 'consuming_target'.
# 'input_file_list' is a list of 'foo.g' file paths.
# 'flags' are extra flags to be passed to qlalr.
function(qt_process_qlalr consuming_target input_file_list flags)
# Don't try to extend_target when cross compiling an imported host target (like a tool).
qt_is_imported_target("${consuming_target}" is_imported)
if(is_imported)
return()
endif()
foreach(input_file ${input_file_list})
file(STRINGS ${input_file} input_file_lines)
qt_qlalr_find_option_in_list("${input_file_lines}" "^%parser(.+)" "parser")
qt_qlalr_find_option_in_list("${input_file_lines}" "^%decl(.+)" "decl")
qt_qlalr_find_option_in_list("${input_file_lines}" "^%impl(.+)" "impl")
get_filename_component(base_file_name ${input_file} NAME_WE)
set(cpp_file "${parser}.cpp")
set(private_file "${parser}_p.h")
set(decl_file "${decl}")
set(impl_file "${impl}")
add_custom_command(
OUTPUT ${cpp_file} ${private_file} ${decl_file} ${impl_file}
COMMAND ${QT_CMAKE_EXPORT_NAMESPACE}::qlalr ${flags} ${input_file}
DEPENDS ${QT_CMAKE_EXPORT_NAMESPACE}::qlalr
MAIN_DEPENDENCY ${input_file}
)
target_sources(${consuming_target} PRIVATE ${cpp_file} ${impl_file})
endforeach()
endfunction()
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