diff options
Diffstat (limited to 'lib/compiler/src/v3_core.erl')
| -rw-r--r-- | lib/compiler/src/v3_core.erl | 84 |
1 files changed, 74 insertions, 10 deletions
diff --git a/lib/compiler/src/v3_core.erl b/lib/compiler/src/v3_core.erl index 3d17557e01..a548ba2f7c 100644 --- a/lib/compiler/src/v3_core.erl +++ b/lib/compiler/src/v3_core.erl @@ -77,7 +77,8 @@ splitwith/2,keyfind/3,sort/1,foreach/2,droplast/1,last/1]). -import(ordsets, [add_element/2,del_element/2,is_element/2, union/1,union/2,intersection/2,subtract/2]). --import(cerl, [ann_c_cons/3,ann_c_cons_skel/3,ann_c_tuple/2,c_tuple/1]). +-import(cerl, [ann_c_cons/3,ann_c_cons_skel/3,ann_c_tuple/2,c_tuple/1, + ann_c_map/2, ann_c_map/3]). -include("core_parse.hrl"). @@ -513,14 +514,33 @@ expr({tuple,L,Es0}, St0) -> expr({map,L,Es0}, St0) -> % erl_lint should make sure only #{ K => V } are allowed % in map construction. - {Es1,Eps,St1} = map_pair_list(Es0, St0), - A = lineno_anno(L, St1), - {#c_map{anno=A,es=Es1},Eps,St1}; + try map_pair_list(Es0, St0) of + {Es1,Eps,St1} -> + A = lineno_anno(L, St1), + {ann_c_map(A,Es1),Eps,St1} + catch + throw:{bad_map,Warning} -> + St = add_warning(L, Warning, St0), + LineAnno = lineno_anno(L, St), + As = [#c_literal{anno=LineAnno,val=badarg}], + {#icall{anno=#a{anno=LineAnno}, %Must have an #a{} + module=#c_literal{anno=LineAnno,val=erlang}, + name=#c_literal{anno=LineAnno,val=error}, + args=As},[],St} + end; expr({map,L,M0,Es0}, St0) -> - {M1,Mps,St1} = safe(M0, St0), - {Es1,Eps,St2} = map_pair_list(Es0, St1), - A = lineno_anno(L, St2), - {#c_map{anno=A,var=M1,es=Es1},Mps++Eps,St2}; + try expr_map(M0,Es0,lineno_anno(L, St0),St0) of + {_,_,_}=Res -> Res + catch + throw:{bad_map,Warning} -> + St = add_warning(L, Warning, St0), + LineAnno = lineno_anno(L, St), + As = [#c_literal{anno=LineAnno,val=badarg}], + {#icall{anno=#a{anno=LineAnno}, %Must have an #a{} + module=#c_literal{anno=LineAnno,val=erlang}, + name=#c_literal{anno=LineAnno,val=error}, + args=As},[],St} + end; expr({bin,L,Es0}, St0) -> try expr_bin(Es0, lineno_anno(L, St0), St0) of {_,_,_}=Res -> Res @@ -730,22 +750,58 @@ make_bool_switch_guard(L, E, V, T, F) -> {clause,NegL,[V],[],[V]} ]}. +expr_map(M0,Es0,A,St0) -> + {M1,Mps,St1} = safe(M0, St0), + case is_valid_map_src(M1) of + true -> + case {M1,Es0} of + {#c_var{}, []} -> + %% transform M#{} to is_map(M) + {Vpat,St2} = new_var(St1), + {Fpat,St3} = new_var(St2), + Cs = [#iclause{ + anno=A, + pats=[Vpat], + guard=[#icall{anno=#a{anno=A}, + module=#c_literal{anno=A,val=erlang}, + name=#c_literal{anno=A,val=is_map}, + args=[Vpat]}], + body=[Vpat]}], + Fc = fail_clause([Fpat], A, #c_literal{val=badarg}), + {#icase{anno=#a{anno=A},args=[M1],clauses=Cs,fc=Fc},Mps,St3}; + {_,_} -> + {Es1,Eps,St2} = map_pair_list(Es0, St1), + {ann_c_map(A,M1,Es1),Mps++Eps,St2} + end; + false -> throw({bad_map,bad_map}) + end. + +is_valid_map_src(#c_literal{val = M}) when is_map(M) -> true; +is_valid_map_src(#c_map{}) -> true; +is_valid_map_src(#c_var{}) -> true; +is_valid_map_src(_) -> false. + map_pair_list(Es, St) -> foldr(fun ({map_field_assoc,L,K0,V0}, {Ces,Esp,St0}) -> {K,Ep0,St1} = safe(K0, St0), + ok = ensure_valid_map_key(K), {V,Ep1,St2} = safe(V0, St1), A = lineno_anno(L, St2), Pair = #c_map_pair{op=#c_literal{val=assoc},anno=A,key=K,val=V}, {[Pair|Ces],Ep0 ++ Ep1 ++ Esp,St2}; ({map_field_exact,L,K0,V0}, {Ces,Esp,St0}) -> {K,Ep0,St1} = safe(K0, St0), + ok = ensure_valid_map_key(K), {V,Ep1,St2} = safe(V0, St1), A = lineno_anno(L, St2), Pair = #c_map_pair{op=#c_literal{val=exact},anno=A,key=K,val=V}, {[Pair|Ces],Ep0 ++ Ep1 ++ Esp,St2} end, {[],[],St}, Es). +ensure_valid_map_key(#c_literal{}) -> ok; +ensure_valid_map_key(_) -> throw({bad_map,bad_map_key}). + %% try_exception([ExcpClause], St) -> {[ExcpVar],Handler,St}. try_exception(Ecs0, St0) -> @@ -1555,7 +1611,9 @@ pattern_map_pair({map_field_exact,L,K,V}, St) -> {bin,L,Es0} -> case constant_bin(Es0) of error -> - throw(badmatch); + %% this will throw a cryptic error message + %% but it is better than nothing + throw(nomatch); Bin -> #c_literal{anno=lineno_anno(L,St),val=Bin} end; @@ -2166,6 +2224,8 @@ lit_vars(Lit) -> lit_vars(Lit, []). lit_vars(#c_cons{hd=H,tl=T}, Vs) -> lit_vars(H, lit_vars(T, Vs)); lit_vars(#c_tuple{es=Es}, Vs) -> lit_list_vars(Es, Vs); +lit_vars(#c_map{arg=V,es=Es}, Vs) -> lit_vars(V, lit_list_vars(Es, Vs)); +lit_vars(#c_map_pair{key=K,val=V}, Vs) -> lit_vars(K, lit_vars(V, Vs)); lit_vars(#c_var{name=V}, Vs) -> add_element(V, Vs); lit_vars(_, Vs) -> Vs. %These are atomic @@ -2256,7 +2316,11 @@ is_simple_list(Es) -> lists:all(fun is_simple/1, Es). format_error(nomatch) -> "pattern cannot possibly match"; format_error(bad_binary) -> - "binary construction will fail because of a type mismatch". + "binary construction will fail because of a type mismatch"; +format_error(bad_map_key) -> + "map construction will fail because of none literal key (large binaries are not literals)"; +format_error(bad_map) -> + "map construction will fail because of a type mismatch". add_warning(Line, Term, #core{ws=Ws,file=[{file,File}]}=St) when Line >= 0 -> St#core{ws=[{File,[{location(Line),?MODULE,Term}]}|Ws]}; |