diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compiler/src/v3_core.erl | 55 |
1 files changed, 46 insertions, 9 deletions
diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 291443f824..0d87432298 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -1505,8 +1505,50 @@ pattern({cons,L,H,T}, St) -> pattern({tuple,L,Ps}, St) -> ann_c_tuple(lineno_anno(L, St), pattern_list(Ps, St)); pattern({map,L,Ps}, St) -> - #c_map{anno=lineno_anno(L, St), es=sort(pattern_list(Ps, St))}; -pattern({map_field_exact,L,K,V}, St) -> + #c_map{anno=lineno_anno(L, St), es=pattern_map_pairs(Ps, St)}; +pattern({bin,L,Ps}, St) -> + %% We don't create a #ibinary record here, since there is + %% no need to hold any used/new annotations in a pattern. + #c_binary{anno=lineno_anno(L, St),segments=pat_bin(Ps, St)}; +pattern({match,_,P1,P2}, St) -> + pat_alias(pattern(P1, St), pattern(P2, St)). + +%% pattern_map_pairs([MapFieldExact],State) -> [#c_map_pairs{}] +pattern_map_pairs(Ps, St) -> + %% check literal key uniqueness (dict is needed) + %% pattern all pairs + {CMapPairs, Kdb} = lists:mapfoldl(fun + (P,Kdbi) -> + #c_map_pair{key=Ck,val=Cv} = CMapPair = pattern_map_pair(P,St), + K = core_lib:literal_value(Ck), + case dict:find(K,Kdbi) of + {ok, Vs} -> + {CMapPair, dict:store(K,[Cv|Vs],Kdbi)}; + _ -> + {CMapPair, dict:store(K,[Cv],Kdbi)} + end + end, dict:new(), Ps), + pattern_alias_map_pairs(CMapPairs,Kdb,dict:new(),St). + +pattern_alias_map_pairs([],_,_,_) -> []; +pattern_alias_map_pairs([#c_map_pair{key=Ck}=Pair|Pairs],Kdb,Kset,St) -> + %% alias same keys if needed + K = core_lib:literal_value(Ck), + case dict:find(K,Kset) of + {ok,processed} -> + pattern_alias_map_pairs(Pairs,Kdb,Kset,St); + _ -> + Cvs = dict:fetch(K,Kdb), + Cv = pattern_alias_map_pair_patterns(Cvs), + Kset1 = dict:store(K, processed, Kset), + [Pair#c_map_pair{val=Cv}|pattern_alias_map_pairs(Pairs,Kdb,Kset1,St)] + end. + +pattern_alias_map_pair_patterns([Cv]) -> Cv; +pattern_alias_map_pair_patterns([Cv1,Cv2|Cvs]) -> + pattern_alias_map_pair_patterns([pat_alias(Cv1,Cv2)|Cvs]). + +pattern_map_pair({map_field_exact,L,K,V}, St) -> %% FIXME: Better way to construct literals? or missing case %% {Key,_,_} = expr(K, St), Key = case K of @@ -1523,13 +1565,8 @@ pattern({map_field_exact,L,K,V}, St) -> #c_map_pair{anno=lineno_anno(L, St), op=#c_literal{val=exact}, key=Key, - val=pattern(V, St)}; -pattern({bin,L,Ps}, St) -> - %% We don't create a #ibinary record here, since there is - %% no need to hold any used/new annotations in a pattern. - #c_binary{anno=lineno_anno(L, St),segments=pat_bin(Ps, St)}; -pattern({match,_,P1,P2}, St) -> - pat_alias(pattern(P1, St), pattern(P2, St)). + val=pattern(V, St)}. + %% pat_bin([BinElement], State) -> [BinSeg]. |