help required for assignment operators in OO ABAP context
I would like to understand the usage of assignment operators in OO ABAP such as:
lit_table_desc ?= cl_abap_typedescr=>describe_by_name( p_source ).
ASSIGN wa_source_->_* TO <source_wa>.
Kindly let me know what is the significance and usage of these and any link where I can find documentation for these.