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-rw-r--r--lib/syntax_tools/src/erl_syntax.erl35
1 files changed, 35 insertions, 0 deletions
diff --git a/lib/syntax_tools/src/erl_syntax.erl b/lib/syntax_tools/src/erl_syntax.erl
index 46a5ca48df..40372a2106 100644
--- a/lib/syntax_tools/src/erl_syntax.erl
+++ b/lib/syntax_tools/src/erl_syntax.erl
@@ -669,6 +669,9 @@ is_leaf(Node) ->
operator -> true; % nonstandard type
string -> true;
text -> true; % nonstandard type
+ map_expr ->
+ map_expr_fields(Node) =:= [] andalso
+ map_expr_argument(Node) =:= none;
tuple -> tuple_elements(Node) =:= [];
underscore -> true;
variable -> true;
@@ -6093,6 +6096,9 @@ abstract([]) ->
nil();
abstract(T) when is_tuple(T) ->
tuple(abstract_list(tuple_to_list(T)));
+abstract(T) when is_map(T) ->
+ map_expr([map_field_assoc(abstract(Key),abstract(Value))
+ || {Key,Value} <- maps:to_list(T)]);
abstract(T) when is_binary(T) ->
binary([binary_field(integer(B)) || B <- binary_to_list(T)]);
abstract(T) ->
@@ -6154,6 +6160,14 @@ concrete(Node) ->
| concrete(list_tail(Node))];
tuple ->
list_to_tuple(concrete_list(tuple_elements(Node)));
+ map_expr ->
+ As = [tuple([map_field_assoc_name(F),
+ map_field_assoc_value(F)]) || F <- map_expr_fields(Node)],
+ M0 = maps:from_list(concrete_list(As)),
+ case map_expr_argument(Node) of
+ none -> M0;
+ Node0 -> maps:merge(concrete(Node0),M0)
+ end;
binary ->
Fs = [revert_binary_field(
binary_field(binary_field_body(F),
@@ -6209,10 +6223,31 @@ is_literal(T) ->
is_literal(list_head(T)) andalso is_literal(list_tail(T));
tuple ->
lists:all(fun is_literal/1, tuple_elements(T));
+ map_expr ->
+ case map_expr_argument(T) of
+ none -> true;
+ Arg -> is_literal(Arg)
+ end andalso lists:all(fun is_literal_map_field/1, map_expr_fields(T));
+ binary ->
+ lists:all(fun is_literal_binary_field/1, binary_fields(T));
_ ->
false
end.
+is_literal_binary_field(F) ->
+ case binary_field_types(F) of
+ [] -> is_literal(binary_field_body(F));
+ _ -> false
+ end.
+
+is_literal_map_field(F) ->
+ case type(F) of
+ map_field_assoc ->
+ is_literal(map_field_assoc_name(F)) andalso
+ is_literal(map_field_assoc_value(F));
+ map_field_exact ->
+ false
+ end.
%% =====================================================================
%% @doc Returns an `erl_parse'-compatible representation of a