Add support for parsing of REF_TO keyword (defined in IEC61131-3 v3). This support is currently inactive (in flex) until we get to add C code generation later on.
include ../common.mk
lib_LIBRARIES = libstage3.a
libstage3_a_SOURCES = \
stage3.cc \
flow_control_analysis.cc \
fill_candidate_datatypes.cc \
narrow_candidate_datatypes.cc \
forced_narrow_candidate_datatypes.cc \
print_datatypes_error.cc \
datatype_functions.cc \
lvalue_check.cc \
array_range_check.cc \
constant_folding.cc \
declaration_check.cc \
enum_declaration_check.cc