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Return parse error instead of crashing the type checker

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This commit is contained in:
Ulf Norell 2019-05-27 11:58:09 +02:00
parent 0fa09467f6
commit ee03442ddf
2 changed files with 15 additions and 8 deletions
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22
src/aeso_parser.erl
View File

@ -211,7 +211,7 @@ exprAtom() ->
, ?RULE(token(hex), set_ann(format, hex, setelement(1, _1, int)))
, {bool, keyword(true), true}
, {bool, keyword(false), false}
, ?RULE(brace_list(?LAZY_P(field_assignment())), record(_1))
, ?LET_P(Fs, brace_list(?LAZY_P(field_assignment())), record(Fs))
, {list, [], bracket_list(Expr)}
, ?RULE(tok('['), Expr, binop('..'), Expr, tok(']'), _3(_2, _4))
, ?RULE(keyword('('), comma_sep(Expr), tok(')'), tuple_e(_1, _2))
@ -254,14 +254,20 @@ record_update(Ann, E, Flds) ->
record([]) -> {map, [], []};
record(Fs) ->
case record_or_map(Fs) of
record -> {record, get_ann(hd(Fs)), Fs};
record ->
Fld = fun({field, _, [_], _} = F) -> F;
({field, Ann, LV, Id, _}) ->
bad_expr_err("Cannot use '@' in record construction", infix({lvalue, Ann, LV}, {'@', Ann}, Id));
({field, Ann, LV, _}) ->
bad_expr_err("Cannot use nested fields or keys in record construction", {lvalue, Ann, LV}) end,
{record, get_ann(hd(Fs)), lists:map(Fld, Fs)};
map ->
Ann = get_ann(hd(Fs ++ [{empty, []}])), %% TODO: source location for empty maps
KV = fun({field, _, [{map_get, _, Key}], Val}) -> {Key, Val};
({field, _, LV, Id, _}) ->
bad_expr_err("Cannot use '@' in map construction", infix(LV, {op, Ann, '@'}, Id));
({field, _, LV, _}) ->
bad_expr_err("Cannot use nested fields or keys in map construction", LV) end,
({field, FAnn, LV, Id, _}) ->
bad_expr_err("Cannot use '@' in map construction", infix({lvalue, FAnn, LV}, {'@', Ann}, Id));
({field, FAnn, LV, _}) ->
bad_expr_err("Cannot use nested fields or keys in map construction", {lvalue, FAnn, LV}) end,
{map, Ann, lists:map(KV, Fs)}
end.
@ -491,11 +497,11 @@ return_error({no_file, L, C}, Err) ->
return_error({F, L, C}, Err) ->
fail(io_lib:format("In ~s at ~p:~p:\n~s", [F, L, C, Err])).
-spec ret_doc_err(ann(), prettypr:document()) -> no_return().
-spec ret_doc_err(ann(), prettypr:document()) -> aeso_parse_lib:parser(none()).
ret_doc_err(Ann, Doc) ->
return_error(ann_pos(Ann), prettypr:format(Doc)).
-spec bad_expr_err(string(), aeso_syntax:expr()) -> no_return().
-spec bad_expr_err(string(), aeso_syntax:expr()) -> aeso_parse_lib:parser(none()).
bad_expr_err(Reason, E) ->
ret_doc_err(get_ann(E),
prettypr:sep([prettypr:text(Reason ++ ":"),

1
src/aeso_pretty.erl
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@ -361,6 +361,7 @@ stmt_p({else, Else}) ->
-spec bin_prec(aeso_syntax:bin_op()) -> {integer(), integer(), integer()}.
bin_prec('..') -> { 0, 0, 0}; %% Always printed inside '[ ]'
bin_prec('=') -> { 0, 0, 0}; %% Always printed inside '[ ]'
bin_prec('@') -> { 0, 0, 0}; %% Only in error messages
bin_prec('||') -> {200, 300, 200};
bin_prec('&&') -> {300, 400, 300};
bin_prec('<') -> {400, 500, 500};