Fix Ubuntu 20.04 build

Author: Argmaster

CMakeLists.txt

@@ -22,7 +22,7 @@ IF(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
 ENDIF()
 
 ADD_LIBRARY(GerberParserCpp STATIC)
-TARGET_COMPILE_FEATURES(GerberParserCpp PRIVATE cxx_std_17)
+TARGET_COMPILE_FEATURES(GerberParserCpp PRIVATE cxx_std_20)
 SET_TARGET_PROPERTIES(GerberParserCpp
     PROPERTIES POSITION_INDEPENDENT_CODE ON
 )
@@ -52,7 +52,7 @@ CPMAddPackage(
 )
 
 pybind11_add_module(PyGerberGerberParserCpp cpp/python/gerber_parser.cpp)
-target_compile_features(PyGerberGerberParserCpp PRIVATE cxx_std_17)
+target_compile_features(PyGerberGerberParserCpp PRIVATE cxx_std_20)
 target_link_libraries(
     PyGerberGerberParserCpp
 PRIVATE
@@ -72,7 +72,7 @@ CPMAddPackage("gh:catchorg/[email protected]")
 
 
 add_executable(tests)
-target_compile_features(tests PRIVATE cxx_std_17)
+target_compile_features(tests PRIVATE cxx_std_20)
 
 file(GLOB_RECURSE test_source_files ${PROJECT_SOURCE_DIR}/cpp/test/ *.test.cpp)
 target_sources(tests PRIVATE ${test_source_files})

cpp/gerber/include/gerber/ast/enums.hpp

@@ -1,5 +1,6 @@
 #pragma once
 #include <cstdint>
+#include <string>
 #include <string_view>
 
 namespace gerber {

cpp/gerber/src/parser.cpp

@@ -42,7 +42,8 @@ namespace gerber {
     }
 
     location_t Parser::parse_global(const std::string_view& source, const location_t& index) {
-        const std::string_view sub_source{source.begin() + index, source.end()};
+        const std::string_view sub_source{source.begin() + index, source.size() - index};
+
         if (sub_source.empty()) {
             return 0;
         }