hwt/hdl/statements.py
def _merge_statements(statements: List["HdlStatement"])\
            -> Tuple[List["HdlStatement"], int]:
        """
        Merge statements in list to remove duplicated if-then-else trees

        :return: tuple (list of merged statements, rank decrease due merging)
        :note: rank decrease is sum of ranks of reduced statements
        :attention: statement list has to me mergable
        """
        order = {}
        for i, stm in enumerate(statements):
            order[stm] = i

        new_statements = []
        rank_decrease = 0

        for rank, stms in groupedby(statements, lambda s: s.rank):
            if rank == 0:
                new_statements.extend(stms)
            else:
                if len(stms) == 1:
                    new_statements.extend(stms)
                    continue

                # try to merge statements if they are same condition tree
                for iA, stmA in enumerate(stms):
                    if stmA is None:
                        continue

                    for iB, stmB in enumerate(islice(stms, iA + 1, None)):
                        if stmB is None:
                            continue

                        if stmA._is_mergable(stmB):
                            rank_decrease += stmB.rank
                            stmA._merge_with_other_stm(stmB)
                            stms[iA + 1 + iB] = None
                            new_statements.append(stmA)
                        else:
                            new_statements.append(stmA)
                            new_statements.append(stmB)

        new_statements.sort(key=lambda stm: order[stm])
        return new_statements, rank_decrease
def _merge_statements(statements: List["HdlStatement"])\
            -> Tuple[List["HdlStatement"], int]:
        order = {}
        for i, stm in enumerate(statements):
            order[stm] = i

        new_statements = []
        rank_decrease = 0

        for rank, stms in groupedby(statements, lambda s: s.rank):
            if rank == 0:
                new_statements.extend(stms)
            else:
                if len(stms) == 1:
                    new_statements.extend(stms)
                    continue

                # try to merge statements if they are same condition tree
                for iA, stmA in enumerate(stms):
                    if stmA is None:
                        continue

                    for iB, stmB in enumerate(islice(stms, iA + 1, None)):
                        if stmB is None:
                            continue

                        if stmA._is_mergable(stmB):
                            rank_decrease += stmB.rank
                            stmA._merge_with_other_stm(stmB)
                            stms[iA + 1 + iB] = None
                            new_statements.append(stmA)
                        else:
                            new_statements.append(stmA)
                            new_statements.append(stmB)

        new_statements.sort(key=lambda stm: order[stm])
        return new_statements, rank_decrease
def _merge_statements ( statements : List [ "HdlStatement" ] ) -> Tuple [ List [ "HdlStatement" ] , int ] : order = { } for i , stm in enumerate ( statements ) : order [ stm ] = i new_statements = [ ] rank_decrease = 0 for rank , stms in groupedby ( statements , lambda s : s . rank ) : if rank == 0 : new_statements . extend ( stms ) else : if len ( stms ) == 1 : new_statements . extend ( stms ) continue # try to merge statements if they are same condition tree for iA , stmA in enumerate ( stms ) : if stmA is None : continue for iB , stmB in enumerate ( islice ( stms , iA + 1 , None ) ) : if stmB is None : continue if stmA . _is_mergable ( stmB ) : rank_decrease += stmB . rank stmA . _merge_with_other_stm ( stmB ) stms [ iA + 1 + iB ] = None new_statements . append ( stmA ) else : new_statements . append ( stmA ) new_statements . append ( stmB ) new_statements . sort ( key = lambda stm : order [ stm ] ) return new_statements , rank_decrease
Merge statements in list to remove duplicated if-then-else trees

        :return: tuple (list of merged statements, rank decrease due merging)
        :note: rank decrease is sum of ranks of reduced statements
        :attention: statement list has to me mergable
Merge statements in list to remove duplicated if - then - else trees