diff options
Diffstat (limited to 'lib/stdlib/src/erl_eval.erl')
| -rw-r--r-- | lib/stdlib/src/erl_eval.erl | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/stdlib/src/erl_eval.erl b/lib/stdlib/src/erl_eval.erl index 18d8148b15..5f96795d92 100644 --- a/lib/stdlib/src/erl_eval.erl +++ b/lib/stdlib/src/erl_eval.erl @@ -239,6 +239,29 @@ expr({record,_,Name,_}, _Bs, _Lf, _Ef, _RBs) -> erlang:raise(error, {undef_record,Name}, stacktrace()); expr({record,_,_,Name,_}, _Bs, _Lf, _Ef, _RBs) -> erlang:raise(error, {undef_record,Name}, stacktrace()); + +%% map +expr({map_field_assoc,_,EK, EV}, Bs0, Lf, Ef, RBs) -> + {value,K,Bs1} = expr(EK, Bs0, Lf, Ef, none), + {value,V,Bs2} = expr(EV, Bs0, Lf, Ef, none), + ret_expr({map_assoc,K,V}, merge_bindings(Bs1,Bs2), RBs); +expr({map_field_exact,_,EK, EV}, Bs0, Lf, Ef, RBs) -> + {value,K,Bs1} = expr(EK, Bs0, Lf, Ef, none), + {value,V,Bs2} = expr(EV, Bs0, Lf, Ef, none), + ret_expr({map_exact,K,V}, merge_bindings(Bs1,Bs2), RBs); +expr({map,_, Binding,Es}, Bs0, Lf, Ef, RBs) -> + {value, Map0, Bs1} = expr(Binding, Bs0, Lf, Ef, RBs), + {Vs,Bs} = expr_list(Es, Bs1, Lf, Ef), + ret_expr(lists:foldl(fun + ({map_assoc,K,V}, Mi) -> maps:put(K,V,Mi); + ({map_exact,K,V}, Mi) -> maps:update(K,V,Mi) + end, Map0, Vs), Bs, RBs); +expr({map,_,Es}, Bs0, Lf, Ef, RBs) -> + {Vs,Bs} = expr_list(Es, Bs0, Lf, Ef), + ret_expr(lists:foldl(fun + ({map_assoc,K,V}, Mi) -> maps:put(K,V,Mi) + end, maps:new(), Vs), Bs, RBs); + expr({block,_,Es}, Bs, Lf, Ef, RBs) -> exprs(Es, Bs, Lf, Ef, RBs); expr({'if',_,Cs}, Bs, Lf, Ef, RBs) -> @@ -994,6 +1017,7 @@ type_test(port) -> is_port; type_test(function) -> is_function; type_test(binary) -> is_binary; type_test(record) -> is_record; +type_test(map) -> is_map; type_test(Test) -> Test. @@ -1075,6 +1099,9 @@ match1({tuple,_,Elts}, Tuple, Bs, BBs) match_tuple(Elts, Tuple, 1, Bs, BBs); match1({tuple,_,_}, _, _Bs, _BBs) -> throw(nomatch); +match1({map,_,Fs}, Map, Bs, BBs) -> + match_map(Fs, Map, Bs, BBs); + match1({bin, _, Fs}, <<_/bitstring>>=B, Bs0, BBs) -> eval_bits:match_bits(Fs, B, Bs0, BBs, match_fun(BBs), @@ -1118,6 +1145,18 @@ match_tuple([E|Es], Tuple, I, Bs0, BBs) -> match_tuple([], _, _, Bs, _BBs) -> {match,Bs}. +match_map([{map_field_exact, _, K, V}|Fs], Map, Bs0, BBs) -> + Vm = try + {value, Ke, _} = expr(K, new_bindings()), + maps:get(Ke,Map) + catch error:_ -> + throw(nomatch) + end, + {match, Bs} = match1(V, Vm, Bs0, BBs), + match_map(Fs, Map, Bs, BBs); +match_map([], _, Bs, _) -> + {match, Bs}. + %% match_list(PatternList, TermList, Bindings) -> %% {match,NewBindings} | nomatch %% Try to match a list of patterns against a list of terms with the |