diff options
Diffstat (limited to 'lib/compiler/src/sys_core_fold.erl')
| -rw-r--r-- | lib/compiler/src/sys_core_fold.erl | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/lib/compiler/src/sys_core_fold.erl b/lib/compiler/src/sys_core_fold.erl index a388960312..1cdbac5693 100644 --- a/lib/compiler/src/sys_core_fold.erl +++ b/lib/compiler/src/sys_core_fold.erl @@ -246,6 +246,16 @@ expr(#c_tuple{anno=Anno,es=Es0}=Tuple, Ctxt, Sub) -> value -> ann_c_tuple(Anno, Es) end; +expr(#c_map{var=V0,es=Es0}=Map, Ctxt, Sub) -> + Es = pair_list(Es0, Ctxt, Sub), + case Ctxt of + effect -> + add_warning(Map, useless_building), + expr(make_effect_seq(Es, Sub), Ctxt, Sub); + value -> + V = expr(V0, Ctxt, Sub), + Map#c_map{var=V,es=Es} + end; expr(#c_binary{segments=Ss}=Bin0, Ctxt, Sub) -> %% Warn for useless building, but always build the binary %% anyway to preserve a possible exception. @@ -408,6 +418,16 @@ expr(#c_try{anno=A,arg=E0,vars=Vs0,body=B0,evars=Evs0,handler=H0}=Try, _, Sub0) expr_list(Es, Ctxt, Sub) -> [expr(E, Ctxt, Sub) || E <- Es]. +pair_list(Es, Ctxt, Sub) -> + [pair(E, Ctxt, Sub) || E <- Es]. + +pair(#c_map_pair{key=K,val=V}, effect, Sub) -> + make_effect_seq([K,V], Sub); +pair(#c_map_pair{key=K0,val=V0}=Pair, value=Ctxt, Sub) -> + K = expr(K0, Ctxt, Sub), + V = expr(V0, Ctxt, Sub), + Pair#c_map_pair{key=K,val=V}. + bitstr_list(Es, Sub) -> [bitstr(E, Sub) || E <- Es]. @@ -677,7 +697,7 @@ useless_call(effect, #c_call{anno=Anno, useless_call(_, _) -> no. %% make_effect_seq([Expr], Sub) -> #c_seq{}|void() -%% Convert a list of epressions evaluated in effect context to a chain of +%% Convert a list of expressions evaluated in effect context to a chain of %% #c_seq{}. The body in the innermost #c_seq{} will be void(). %% Anything that will not have any effect will be thrown away. @@ -1500,6 +1520,9 @@ pattern(#c_cons{anno=Anno,hd=H0,tl=T0}, Isub, Osub0) -> pattern(#c_tuple{anno=Anno,es=Es0}, Isub, Osub0) -> {Es1,Osub1} = pattern_list(Es0, Isub, Osub0), {ann_c_tuple(Anno, Es1),Osub1}; +pattern(#c_map{anno=Anno,es=Es0}=Map, Isub, Osub0) -> + {Es1,Osub1} = map_pair_pattern_list(Es0, Isub, Osub0), + {Map#c_map{anno=Anno,es=Es1},Osub1}; pattern(#c_binary{segments=V0}=Pat, Isub, Osub0) -> {V1,Osub1} = bin_pattern_list(V0, Isub, Osub0), {Pat#c_binary{segments=V1},Osub1}; @@ -1509,6 +1532,15 @@ pattern(#c_alias{var=V0,pat=P0}=Pat, Isub, Osub0) -> Osub = update_types(V1, [P1], Osub2), {Pat#c_alias{var=V1,pat=P1},Osub}. +map_pair_pattern_list(Ps0, Isub, Osub0) -> + {Ps,{_,Osub}} = mapfoldl(fun map_pair_pattern/2, {Isub,Osub0}, Ps0), + {Ps,Osub}. + +map_pair_pattern(#c_map_pair{op=#c_literal{val=exact},key=K0,val=V0}=Pair, {Isub,Osub0}) -> + {K,Osub1} = pattern(K0, Isub, Osub0), + {V,Osub} = pattern(V0, Isub, Osub1), + {Pair#c_map_pair{key=K,val=V},{Isub,Osub}}. + bin_pattern_list(Ps0, Isub, Osub0) -> {Ps,{_,Osub}} = mapfoldl(fun bin_pattern/2, {Isub,Osub0}, Ps0), {Ps,Osub}. @@ -2987,6 +3019,9 @@ format_error(result_ignored) -> "(suppress the warning by assigning the expression to the _ variable)"; format_error(useless_building) -> "a term is constructed, but never used"; +format_error({map_pair_key_overloaded,K}) -> + M = io_lib:format("the key ~p is used multiple times in map value association",[K]), + flatten(M); format_error(bin_opt_alias) -> "INFO: the '=' operator will prevent delayed sub binary optimization"; format_error(bin_partition) -> |