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-rw-r--r--crates/ra_hir_ty/src/_match.rs790
1 files changed, 406 insertions, 384 deletions
diff --git a/crates/ra_hir_ty/src/_match.rs b/crates/ra_hir_ty/src/_match.rs
index fff257193..02a7a61f1 100644
--- a/crates/ra_hir_ty/src/_match.rs
+++ b/crates/ra_hir_ty/src/_match.rs
@@ -362,7 +362,12 @@ impl PatStack {
362 cx: &MatchCheckCtx, 362 cx: &MatchCheckCtx,
363 constructor: &Constructor, 363 constructor: &Constructor,
364 ) -> MatchCheckResult<Option<PatStack>> { 364 ) -> MatchCheckResult<Option<PatStack>> {
365 let result = match (self.head().as_pat(cx), constructor) { 365 if self.is_empty() {
366 return Ok(None);
367 }
368
369 let head_pat = self.head().as_pat(cx);
370 let result = match (head_pat, constructor) {
366 (Pat::Tuple { args: ref pat_ids, ellipsis }, Constructor::Tuple { arity: _ }) => { 371 (Pat::Tuple { args: ref pat_ids, ellipsis }, Constructor::Tuple { arity: _ }) => {
367 if ellipsis.is_some() { 372 if ellipsis.is_some() {
368 // If there are ellipsis here, we should add the correct number of 373 // If there are ellipsis here, we should add the correct number of
@@ -531,7 +536,7 @@ impl Matrix {
531 } 536 }
532 537
533 fn heads(&self) -> Vec<PatIdOrWild> { 538 fn heads(&self) -> Vec<PatIdOrWild> {
534 self.0.iter().map(|p| p.head()).collect() 539 self.0.iter().flat_map(|p| p.get_head()).collect()
535 } 540 }
536 541
537 /// Computes `D(self)` for each contained PatStack. 542 /// Computes `D(self)` for each contained PatStack.
@@ -837,194 +842,193 @@ mod tests {
837 842
838 pub(super) use crate::{diagnostics::MissingMatchArms, test_db::TestDB}; 843 pub(super) use crate::{diagnostics::MissingMatchArms, test_db::TestDB};
839 844
840 pub(super) fn check_diagnostic_message(content: &str) -> String { 845 pub(super) fn check_diagnostic_message(ra_fixture: &str) -> String {
841 TestDB::with_single_file(content).0.diagnostic::<MissingMatchArms>().0 846 TestDB::with_single_file(ra_fixture).0.diagnostic::<MissingMatchArms>().0
842 } 847 }
843 848
844 pub(super) fn check_diagnostic(content: &str) { 849 pub(super) fn check_diagnostic(ra_fixture: &str) {
845 let diagnostic_count = 850 let diagnostic_count =
846 TestDB::with_single_file(content).0.diagnostic::<MissingMatchArms>().1; 851 TestDB::with_single_file(ra_fixture).0.diagnostic::<MissingMatchArms>().1;
847 852
848 assert_eq!(1, diagnostic_count, "no diagnostic reported"); 853 assert_eq!(1, diagnostic_count, "no diagnostic reported");
849 } 854 }
850 855
851 pub(super) fn check_no_diagnostic(content: &str) { 856 pub(super) fn check_no_diagnostic(ra_fixture: &str) {
852 let diagnostic_count = 857 let diagnostic_count =
853 TestDB::with_single_file(content).0.diagnostic::<MissingMatchArms>().1; 858 TestDB::with_single_file(ra_fixture).0.diagnostic::<MissingMatchArms>().1;
854 859
855 assert_eq!(0, diagnostic_count, "expected no diagnostic, found one"); 860 assert_eq!(0, diagnostic_count, "expected no diagnostic, found one");
856 } 861 }
857 862
858 #[test] 863 #[test]
859 fn empty_tuple_no_arms_diagnostic_message() { 864 fn empty_tuple_no_arms_diagnostic_message() {
860 let content = r"
861 fn test_fn() {
862 match () {
863 }
864 }
865 ";
866
867 assert_snapshot!( 865 assert_snapshot!(
868 check_diagnostic_message(content), 866 check_diagnostic_message(r"
867 fn test_fn() {
868 match () {
869 }
870 }
871 "),
869 @"\"()\": Missing match arm\n" 872 @"\"()\": Missing match arm\n"
870 ); 873 );
871 } 874 }
872 875
873 #[test] 876 #[test]
874 fn empty_tuple_no_arms() { 877 fn empty_tuple_no_arms() {
875 let content = r" 878 check_diagnostic(
879 r"
876 fn test_fn() { 880 fn test_fn() {
877 match () { 881 match () {
878 } 882 }
879 } 883 }
880 "; 884 ",
881 885 );
882 check_diagnostic(content);
883 } 886 }
884 887
885 #[test] 888 #[test]
886 fn empty_tuple_wild() { 889 fn empty_tuple_wild() {
887 let content = r" 890 check_no_diagnostic(
891 r"
888 fn test_fn() { 892 fn test_fn() {
889 match () { 893 match () {
890 _ => {} 894 _ => {}
891 } 895 }
892 } 896 }
893 "; 897 ",
894 898 );
895 check_no_diagnostic(content);
896 } 899 }
897 900
898 #[test] 901 #[test]
899 fn empty_tuple_no_diagnostic() { 902 fn empty_tuple_no_diagnostic() {
900 let content = r" 903 check_no_diagnostic(
904 r"
901 fn test_fn() { 905 fn test_fn() {
902 match () { 906 match () {
903 () => {} 907 () => {}
904 } 908 }
905 } 909 }
906 "; 910 ",
907 911 );
908 check_no_diagnostic(content);
909 } 912 }
910 913
911 #[test] 914 #[test]
912 fn tuple_of_empty_tuple_no_arms() { 915 fn tuple_of_empty_tuple_no_arms() {
913 let content = r" 916 check_diagnostic(
917 r"
914 fn test_fn() { 918 fn test_fn() {
915 match (()) { 919 match (()) {
916 } 920 }
917 } 921 }
918 "; 922 ",
919 923 );
920 check_diagnostic(content);
921 } 924 }
922 925
923 #[test] 926 #[test]
924 fn tuple_of_empty_tuple_no_diagnostic() { 927 fn tuple_of_empty_tuple_no_diagnostic() {
925 let content = r" 928 check_no_diagnostic(
929 r"
926 fn test_fn() { 930 fn test_fn() {
927 match (()) { 931 match (()) {
928 (()) => {} 932 (()) => {}
929 } 933 }
930 } 934 }
931 "; 935 ",
932 936 );
933 check_no_diagnostic(content);
934 } 937 }
935 938
936 #[test] 939 #[test]
937 fn tuple_of_two_empty_tuple_no_arms() { 940 fn tuple_of_two_empty_tuple_no_arms() {
938 let content = r" 941 check_diagnostic(
942 r"
939 fn test_fn() { 943 fn test_fn() {
940 match ((), ()) { 944 match ((), ()) {
941 } 945 }
942 } 946 }
943 "; 947 ",
944 948 );
945 check_diagnostic(content);
946 } 949 }
947 950
948 #[test] 951 #[test]
949 fn tuple_of_two_empty_tuple_no_diagnostic() { 952 fn tuple_of_two_empty_tuple_no_diagnostic() {
950 let content = r" 953 check_no_diagnostic(
954 r"
951 fn test_fn() { 955 fn test_fn() {
952 match ((), ()) { 956 match ((), ()) {
953 ((), ()) => {} 957 ((), ()) => {}
954 } 958 }
955 } 959 }
956 "; 960 ",
957 961 );
958 check_no_diagnostic(content);
959 } 962 }
960 963
961 #[test] 964 #[test]
962 fn bool_no_arms() { 965 fn bool_no_arms() {
963 let content = r" 966 check_diagnostic(
967 r"
964 fn test_fn() { 968 fn test_fn() {
965 match false { 969 match false {
966 } 970 }
967 } 971 }
968 "; 972 ",
969 973 );
970 check_diagnostic(content);
971 } 974 }
972 975
973 #[test] 976 #[test]
974 fn bool_missing_arm() { 977 fn bool_missing_arm() {
975 let content = r" 978 check_diagnostic(
979 r"
976 fn test_fn() { 980 fn test_fn() {
977 match false { 981 match false {
978 true => {} 982 true => {}
979 } 983 }
980 } 984 }
981 "; 985 ",
982 986 );
983 check_diagnostic(content);
984 } 987 }
985 988
986 #[test] 989 #[test]
987 fn bool_no_diagnostic() { 990 fn bool_no_diagnostic() {
988 let content = r" 991 check_no_diagnostic(
992 r"
989 fn test_fn() { 993 fn test_fn() {
990 match false { 994 match false {
991 true => {} 995 true => {}
992 false => {} 996 false => {}
993 } 997 }
994 } 998 }
995 "; 999 ",
996 1000 );
997 check_no_diagnostic(content);
998 } 1001 }
999 1002
1000 #[test] 1003 #[test]
1001 fn tuple_of_bools_no_arms() { 1004 fn tuple_of_bools_no_arms() {
1002 let content = r" 1005 check_diagnostic(
1006 r"
1003 fn test_fn() { 1007 fn test_fn() {
1004 match (false, true) { 1008 match (false, true) {
1005 } 1009 }
1006 } 1010 }
1007 "; 1011 ",
1008 1012 );
1009 check_diagnostic(content);
1010 } 1013 }
1011 1014
1012 #[test] 1015 #[test]
1013 fn tuple_of_bools_missing_arms() { 1016 fn tuple_of_bools_missing_arms() {
1014 let content = r" 1017 check_diagnostic(
1018 r"
1015 fn test_fn() { 1019 fn test_fn() {
1016 match (false, true) { 1020 match (false, true) {
1017 (true, true) => {}, 1021 (true, true) => {},
1018 } 1022 }
1019 } 1023 }
1020 "; 1024 ",
1021 1025 );
1022 check_diagnostic(content);
1023 } 1026 }
1024 1027
1025 #[test] 1028 #[test]
1026 fn tuple_of_bools_missing_arm() { 1029 fn tuple_of_bools_missing_arm() {
1027 let content = r" 1030 check_diagnostic(
1031 r"
1028 fn test_fn() { 1032 fn test_fn() {
1029 match (false, true) { 1033 match (false, true) {
1030 (false, true) => {}, 1034 (false, true) => {},
@@ -1032,14 +1036,14 @@ mod tests {
1032 (true, false) => {}, 1036 (true, false) => {},
1033 } 1037 }
1034 } 1038 }
1035 "; 1039 ",
1036 1040 );
1037 check_diagnostic(content);
1038 } 1041 }
1039 1042
1040 #[test] 1043 #[test]
1041 fn tuple_of_bools_with_wilds() { 1044 fn tuple_of_bools_with_wilds() {
1042 let content = r" 1045 check_no_diagnostic(
1046 r"
1043 fn test_fn() { 1047 fn test_fn() {
1044 match (false, true) { 1048 match (false, true) {
1045 (false, _) => {}, 1049 (false, _) => {},
@@ -1047,14 +1051,14 @@ mod tests {
1047 (_, true) => {}, 1051 (_, true) => {},
1048 } 1052 }
1049 } 1053 }
1050 "; 1054 ",
1051 1055 );
1052 check_no_diagnostic(content);
1053 } 1056 }
1054 1057
1055 #[test] 1058 #[test]
1056 fn tuple_of_bools_no_diagnostic() { 1059 fn tuple_of_bools_no_diagnostic() {
1057 let content = r" 1060 check_no_diagnostic(
1061 r"
1058 fn test_fn() { 1062 fn test_fn() {
1059 match (false, true) { 1063 match (false, true) {
1060 (true, true) => {}, 1064 (true, true) => {},
@@ -1063,27 +1067,27 @@ mod tests {
1063 (false, false) => {}, 1067 (false, false) => {},
1064 } 1068 }
1065 } 1069 }
1066 "; 1070 ",
1067 1071 );
1068 check_no_diagnostic(content);
1069 } 1072 }
1070 1073
1071 #[test] 1074 #[test]
1072 fn tuple_of_bools_binding_missing_arms() { 1075 fn tuple_of_bools_binding_missing_arms() {
1073 let content = r" 1076 check_diagnostic(
1077 r"
1074 fn test_fn() { 1078 fn test_fn() {
1075 match (false, true) { 1079 match (false, true) {
1076 (true, _x) => {}, 1080 (true, _x) => {},
1077 } 1081 }
1078 } 1082 }
1079 "; 1083 ",
1080 1084 );
1081 check_diagnostic(content);
1082 } 1085 }
1083 1086
1084 #[test] 1087 #[test]
1085 fn tuple_of_bools_binding_no_diagnostic() { 1088 fn tuple_of_bools_binding_no_diagnostic() {
1086 let content = r" 1089 check_no_diagnostic(
1090 r"
1087 fn test_fn() { 1091 fn test_fn() {
1088 match (false, true) { 1092 match (false, true) {
1089 (true, _x) => {}, 1093 (true, _x) => {},
@@ -1091,80 +1095,80 @@ mod tests {
1091 (false, false) => {}, 1095 (false, false) => {},
1092 } 1096 }
1093 } 1097 }
1094 "; 1098 ",
1095 1099 );
1096 check_no_diagnostic(content);
1097 } 1100 }
1098 1101
1099 #[test] 1102 #[test]
1100 fn tuple_of_bools_with_ellipsis_at_end_no_diagnostic() { 1103 fn tuple_of_bools_with_ellipsis_at_end_no_diagnostic() {
1101 let content = r" 1104 check_no_diagnostic(
1105 r"
1102 fn test_fn() { 1106 fn test_fn() {
1103 match (false, true, false) { 1107 match (false, true, false) {
1104 (false, ..) => {}, 1108 (false, ..) => {},
1105 (true, ..) => {}, 1109 (true, ..) => {},
1106 } 1110 }
1107 } 1111 }
1108 "; 1112 ",
1109 1113 );
1110 check_no_diagnostic(content);
1111 } 1114 }
1112 1115
1113 #[test] 1116 #[test]
1114 fn tuple_of_bools_with_ellipsis_at_beginning_no_diagnostic() { 1117 fn tuple_of_bools_with_ellipsis_at_beginning_no_diagnostic() {
1115 let content = r" 1118 check_no_diagnostic(
1119 r"
1116 fn test_fn() { 1120 fn test_fn() {
1117 match (false, true, false) { 1121 match (false, true, false) {
1118 (.., false) => {}, 1122 (.., false) => {},
1119 (.., true) => {}, 1123 (.., true) => {},
1120 } 1124 }
1121 } 1125 }
1122 "; 1126 ",
1123 1127 );
1124 check_no_diagnostic(content);
1125 } 1128 }
1126 1129
1127 #[test] 1130 #[test]
1128 fn tuple_of_bools_with_ellipsis_no_diagnostic() { 1131 fn tuple_of_bools_with_ellipsis_no_diagnostic() {
1129 let content = r" 1132 check_no_diagnostic(
1133 r"
1130 fn test_fn() { 1134 fn test_fn() {
1131 match (false, true, false) { 1135 match (false, true, false) {
1132 (..) => {}, 1136 (..) => {},
1133 } 1137 }
1134 } 1138 }
1135 "; 1139 ",
1136 1140 );
1137 check_no_diagnostic(content);
1138 } 1141 }
1139 1142
1140 #[test] 1143 #[test]
1141 fn tuple_of_tuple_and_bools_no_arms() { 1144 fn tuple_of_tuple_and_bools_no_arms() {
1142 let content = r" 1145 check_diagnostic(
1146 r"
1143 fn test_fn() { 1147 fn test_fn() {
1144 match (false, ((), false)) { 1148 match (false, ((), false)) {
1145 } 1149 }
1146 } 1150 }
1147 "; 1151 ",
1148 1152 );
1149 check_diagnostic(content);
1150 } 1153 }
1151 1154
1152 #[test] 1155 #[test]
1153 fn tuple_of_tuple_and_bools_missing_arms() { 1156 fn tuple_of_tuple_and_bools_missing_arms() {
1154 let content = r" 1157 check_diagnostic(
1158 r"
1155 fn test_fn() { 1159 fn test_fn() {
1156 match (false, ((), false)) { 1160 match (false, ((), false)) {
1157 (true, ((), true)) => {}, 1161 (true, ((), true)) => {},
1158 } 1162 }
1159 } 1163 }
1160 "; 1164 ",
1161 1165 );
1162 check_diagnostic(content);
1163 } 1166 }
1164 1167
1165 #[test] 1168 #[test]
1166 fn tuple_of_tuple_and_bools_no_diagnostic() { 1169 fn tuple_of_tuple_and_bools_no_diagnostic() {
1167 let content = r" 1170 check_no_diagnostic(
1171 r"
1168 fn test_fn() { 1172 fn test_fn() {
1169 match (false, ((), false)) { 1173 match (false, ((), false)) {
1170 (true, ((), true)) => {}, 1174 (true, ((), true)) => {},
@@ -1173,27 +1177,27 @@ mod tests {
1173 (false, ((), false)) => {}, 1177 (false, ((), false)) => {},
1174 } 1178 }
1175 } 1179 }
1176 "; 1180 ",
1177 1181 );
1178 check_no_diagnostic(content);
1179 } 1182 }
1180 1183
1181 #[test] 1184 #[test]
1182 fn tuple_of_tuple_and_bools_wildcard_missing_arms() { 1185 fn tuple_of_tuple_and_bools_wildcard_missing_arms() {
1183 let content = r" 1186 check_diagnostic(
1187 r"
1184 fn test_fn() { 1188 fn test_fn() {
1185 match (false, ((), false)) { 1189 match (false, ((), false)) {
1186 (true, _) => {}, 1190 (true, _) => {},
1187 } 1191 }
1188 } 1192 }
1189 "; 1193 ",
1190 1194 );
1191 check_diagnostic(content);
1192 } 1195 }
1193 1196
1194 #[test] 1197 #[test]
1195 fn tuple_of_tuple_and_bools_wildcard_no_diagnostic() { 1198 fn tuple_of_tuple_and_bools_wildcard_no_diagnostic() {
1196 let content = r" 1199 check_no_diagnostic(
1200 r"
1197 fn test_fn() { 1201 fn test_fn() {
1198 match (false, ((), false)) { 1202 match (false, ((), false)) {
1199 (true, ((), true)) => {}, 1203 (true, ((), true)) => {},
@@ -1201,14 +1205,14 @@ mod tests {
1201 (false, _) => {}, 1205 (false, _) => {},
1202 } 1206 }
1203 } 1207 }
1204 "; 1208 ",
1205 1209 );
1206 check_no_diagnostic(content);
1207 } 1210 }
1208 1211
1209 #[test] 1212 #[test]
1210 fn enum_no_arms() { 1213 fn enum_no_arms() {
1211 let content = r" 1214 check_diagnostic(
1215 r"
1212 enum Either { 1216 enum Either {
1213 A, 1217 A,
1214 B, 1218 B,
@@ -1217,14 +1221,14 @@ mod tests {
1217 match Either::A { 1221 match Either::A {
1218 } 1222 }
1219 } 1223 }
1220 "; 1224 ",
1221 1225 );
1222 check_diagnostic(content);
1223 } 1226 }
1224 1227
1225 #[test] 1228 #[test]
1226 fn enum_missing_arms() { 1229 fn enum_missing_arms() {
1227 let content = r" 1230 check_diagnostic(
1231 r"
1228 enum Either { 1232 enum Either {
1229 A, 1233 A,
1230 B, 1234 B,
@@ -1234,14 +1238,14 @@ mod tests {
1234 Either::A => {}, 1238 Either::A => {},
1235 } 1239 }
1236 } 1240 }
1237 "; 1241 ",
1238 1242 );
1239 check_diagnostic(content);
1240 } 1243 }
1241 1244
1242 #[test] 1245 #[test]
1243 fn enum_no_diagnostic() { 1246 fn enum_no_diagnostic() {
1244 let content = r" 1247 check_no_diagnostic(
1248 r"
1245 enum Either { 1249 enum Either {
1246 A, 1250 A,
1247 B, 1251 B,
@@ -1252,14 +1256,14 @@ mod tests {
1252 Either::B => {}, 1256 Either::B => {},
1253 } 1257 }
1254 } 1258 }
1255 "; 1259 ",
1256 1260 );
1257 check_no_diagnostic(content);
1258 } 1261 }
1259 1262
1260 #[test] 1263 #[test]
1261 fn enum_ref_missing_arms() { 1264 fn enum_ref_missing_arms() {
1262 let content = r" 1265 check_diagnostic(
1266 r"
1263 enum Either { 1267 enum Either {
1264 A, 1268 A,
1265 B, 1269 B,
@@ -1269,14 +1273,14 @@ mod tests {
1269 Either::A => {}, 1273 Either::A => {},
1270 } 1274 }
1271 } 1275 }
1272 "; 1276 ",
1273 1277 );
1274 check_diagnostic(content);
1275 } 1278 }
1276 1279
1277 #[test] 1280 #[test]
1278 fn enum_ref_no_diagnostic() { 1281 fn enum_ref_no_diagnostic() {
1279 let content = r" 1282 check_no_diagnostic(
1283 r"
1280 enum Either { 1284 enum Either {
1281 A, 1285 A,
1282 B, 1286 B,
@@ -1287,14 +1291,14 @@ mod tests {
1287 Either::B => {}, 1291 Either::B => {},
1288 } 1292 }
1289 } 1293 }
1290 "; 1294 ",
1291 1295 );
1292 check_no_diagnostic(content);
1293 } 1296 }
1294 1297
1295 #[test] 1298 #[test]
1296 fn enum_containing_bool_no_arms() { 1299 fn enum_containing_bool_no_arms() {
1297 let content = r" 1300 check_diagnostic(
1301 r"
1298 enum Either { 1302 enum Either {
1299 A(bool), 1303 A(bool),
1300 B, 1304 B,
@@ -1303,14 +1307,14 @@ mod tests {
1303 match Either::B { 1307 match Either::B {
1304 } 1308 }
1305 } 1309 }
1306 "; 1310 ",
1307 1311 );
1308 check_diagnostic(content);
1309 } 1312 }
1310 1313
1311 #[test] 1314 #[test]
1312 fn enum_containing_bool_missing_arms() { 1315 fn enum_containing_bool_missing_arms() {
1313 let content = r" 1316 check_diagnostic(
1317 r"
1314 enum Either { 1318 enum Either {
1315 A(bool), 1319 A(bool),
1316 B, 1320 B,
@@ -1321,14 +1325,14 @@ mod tests {
1321 Either::B => (), 1325 Either::B => (),
1322 } 1326 }
1323 } 1327 }
1324 "; 1328 ",
1325 1329 );
1326 check_diagnostic(content);
1327 } 1330 }
1328 1331
1329 #[test] 1332 #[test]
1330 fn enum_containing_bool_no_diagnostic() { 1333 fn enum_containing_bool_no_diagnostic() {
1331 let content = r" 1334 check_no_diagnostic(
1335 r"
1332 enum Either { 1336 enum Either {
1333 A(bool), 1337 A(bool),
1334 B, 1338 B,
@@ -1340,14 +1344,14 @@ mod tests {
1340 Either::B => (), 1344 Either::B => (),
1341 } 1345 }
1342 } 1346 }
1343 "; 1347 ",
1344 1348 );
1345 check_no_diagnostic(content);
1346 } 1349 }
1347 1350
1348 #[test] 1351 #[test]
1349 fn enum_containing_bool_with_wild_no_diagnostic() { 1352 fn enum_containing_bool_with_wild_no_diagnostic() {
1350 let content = r" 1353 check_no_diagnostic(
1354 r"
1351 enum Either { 1355 enum Either {
1352 A(bool), 1356 A(bool),
1353 B, 1357 B,
@@ -1358,14 +1362,14 @@ mod tests {
1358 _ => (), 1362 _ => (),
1359 } 1363 }
1360 } 1364 }
1361 "; 1365 ",
1362 1366 );
1363 check_no_diagnostic(content);
1364 } 1367 }
1365 1368
1366 #[test] 1369 #[test]
1367 fn enum_containing_bool_with_wild_2_no_diagnostic() { 1370 fn enum_containing_bool_with_wild_2_no_diagnostic() {
1368 let content = r" 1371 check_no_diagnostic(
1372 r"
1369 enum Either { 1373 enum Either {
1370 A(bool), 1374 A(bool),
1371 B, 1375 B,
@@ -1376,14 +1380,14 @@ mod tests {
1376 Either::B => (), 1380 Either::B => (),
1377 } 1381 }
1378 } 1382 }
1379 "; 1383 ",
1380 1384 );
1381 check_no_diagnostic(content);
1382 } 1385 }
1383 1386
1384 #[test] 1387 #[test]
1385 fn enum_different_sizes_missing_arms() { 1388 fn enum_different_sizes_missing_arms() {
1386 let content = r" 1389 check_diagnostic(
1390 r"
1387 enum Either { 1391 enum Either {
1388 A(bool), 1392 A(bool),
1389 B(bool, bool), 1393 B(bool, bool),
@@ -1394,14 +1398,14 @@ mod tests {
1394 Either::B(false, _) => (), 1398 Either::B(false, _) => (),
1395 } 1399 }
1396 } 1400 }
1397 "; 1401 ",
1398 1402 );
1399 check_diagnostic(content);
1400 } 1403 }
1401 1404
1402 #[test] 1405 #[test]
1403 fn enum_different_sizes_no_diagnostic() { 1406 fn enum_different_sizes_no_diagnostic() {
1404 let content = r" 1407 check_no_diagnostic(
1408 r"
1405 enum Either { 1409 enum Either {
1406 A(bool), 1410 A(bool),
1407 B(bool, bool), 1411 B(bool, bool),
@@ -1413,14 +1417,14 @@ mod tests {
1413 Either::B(false, _) => (), 1417 Either::B(false, _) => (),
1414 } 1418 }
1415 } 1419 }
1416 "; 1420 ",
1417 1421 );
1418 check_no_diagnostic(content);
1419 } 1422 }
1420 1423
1421 #[test] 1424 #[test]
1422 fn or_no_diagnostic() { 1425 fn or_no_diagnostic() {
1423 let content = r" 1426 check_no_diagnostic(
1427 r"
1424 enum Either { 1428 enum Either {
1425 A(bool), 1429 A(bool),
1426 B(bool, bool), 1430 B(bool, bool),
@@ -1432,14 +1436,14 @@ mod tests {
1432 Either::B(false, _) => (), 1436 Either::B(false, _) => (),
1433 } 1437 }
1434 } 1438 }
1435 "; 1439 ",
1436 1440 );
1437 check_no_diagnostic(content);
1438 } 1441 }
1439 1442
1440 #[test] 1443 #[test]
1441 fn tuple_of_enum_no_diagnostic() { 1444 fn tuple_of_enum_no_diagnostic() {
1442 let content = r" 1445 check_no_diagnostic(
1446 r"
1443 enum Either { 1447 enum Either {
1444 A(bool), 1448 A(bool),
1445 B(bool, bool), 1449 B(bool, bool),
@@ -1456,14 +1460,16 @@ mod tests {
1456 (Either::B(_, _), Either2::D) => (), 1460 (Either::B(_, _), Either2::D) => (),
1457 } 1461 }
1458 } 1462 }
1459 "; 1463 ",
1460 1464 );
1461 check_no_diagnostic(content);
1462 } 1465 }
1463 1466
1464 #[test] 1467 #[test]
1465 fn mismatched_types() { 1468 fn mismatched_types() {
1466 let content = r" 1469 // Match statements with arms that don't match the
1470 // expression pattern do not fire this diagnostic.
1471 check_no_diagnostic(
1472 r"
1467 enum Either { 1473 enum Either {
1468 A, 1474 A,
1469 B, 1475 B,
@@ -1478,47 +1484,47 @@ mod tests {
1478 Either2::D => (), 1484 Either2::D => (),
1479 } 1485 }
1480 } 1486 }
1481 "; 1487 ",
1482 1488 );
1483 // Match statements with arms that don't match the
1484 // expression pattern do not fire this diagnostic.
1485 check_no_diagnostic(content);
1486 } 1489 }
1487 1490
1488 #[test] 1491 #[test]
1489 fn mismatched_types_with_different_arity() { 1492 fn mismatched_types_with_different_arity() {
1490 let content = r" 1493 // Match statements with arms that don't match the
1494 // expression pattern do not fire this diagnostic.
1495 check_no_diagnostic(
1496 r"
1491 fn test_fn() { 1497 fn test_fn() {
1492 match (true, false) { 1498 match (true, false) {
1493 (true, false, true) => (), 1499 (true, false, true) => (),
1494 (true) => (), 1500 (true) => (),
1495 } 1501 }
1496 } 1502 }
1497 "; 1503 ",
1498 1504 );
1499 // Match statements with arms that don't match the
1500 // expression pattern do not fire this diagnostic.
1501 check_no_diagnostic(content);
1502 } 1505 }
1503 1506
1504 #[test] 1507 #[test]
1505 fn malformed_match_arm_tuple_missing_pattern() { 1508 fn malformed_match_arm_tuple_missing_pattern() {
1506 let content = r" 1509 // Match statements with arms that don't match the
1510 // expression pattern do not fire this diagnostic.
1511 check_no_diagnostic(
1512 r"
1507 fn test_fn() { 1513 fn test_fn() {
1508 match (0) { 1514 match (0) {
1509 () => (), 1515 () => (),
1510 } 1516 }
1511 } 1517 }
1512 "; 1518 ",
1513 1519 );
1514 // Match statements with arms that don't match the
1515 // expression pattern do not fire this diagnostic.
1516 check_no_diagnostic(content);
1517 } 1520 }
1518 1521
1519 #[test] 1522 #[test]
1520 fn malformed_match_arm_tuple_enum_missing_pattern() { 1523 fn malformed_match_arm_tuple_enum_missing_pattern() {
1521 let content = r" 1524 // We are testing to be sure we don't panic here when the match
1525 // arm `Either::B` is missing its pattern.
1526 check_no_diagnostic(
1527 r"
1522 enum Either { 1528 enum Either {
1523 A, 1529 A,
1524 B(u32), 1530 B(u32),
@@ -1529,32 +1535,30 @@ mod tests {
1529 Either::B() => (), 1535 Either::B() => (),
1530 } 1536 }
1531 } 1537 }
1532 "; 1538 ",
1533 1539 );
1534 // We are testing to be sure we don't panic here when the match
1535 // arm `Either::B` is missing its pattern.
1536 check_no_diagnostic(content);
1537 } 1540 }
1538 1541
1539 #[test] 1542 #[test]
1540 fn enum_not_in_scope() { 1543 fn enum_not_in_scope() {
1541 let content = r" 1544 // The enum is not in scope so we don't perform exhaustiveness
1545 // checking, but we want to be sure we don't panic here (and
1546 // we don't create a diagnostic).
1547 check_no_diagnostic(
1548 r"
1542 fn test_fn() { 1549 fn test_fn() {
1543 match Foo::Bar { 1550 match Foo::Bar {
1544 Foo::Baz => (), 1551 Foo::Baz => (),
1545 } 1552 }
1546 } 1553 }
1547 "; 1554 ",
1548 1555 );
1549 // The enum is not in scope so we don't perform exhaustiveness
1550 // checking, but we want to be sure we don't panic here (and
1551 // we don't create a diagnostic).
1552 check_no_diagnostic(content);
1553 } 1556 }
1554 1557
1555 #[test] 1558 #[test]
1556 fn expr_diverges() { 1559 fn expr_diverges() {
1557 let content = r" 1560 check_no_diagnostic(
1561 r"
1558 enum Either { 1562 enum Either {
1559 A, 1563 A,
1560 B, 1564 B,
@@ -1565,14 +1569,14 @@ mod tests {
1565 Either::B => (), 1569 Either::B => (),
1566 } 1570 }
1567 } 1571 }
1568 "; 1572 ",
1569 1573 );
1570 check_no_diagnostic(content);
1571 } 1574 }
1572 1575
1573 #[test] 1576 #[test]
1574 fn expr_loop_with_break() { 1577 fn expr_loop_with_break() {
1575 let content = r" 1578 check_no_diagnostic(
1579 r"
1576 enum Either { 1580 enum Either {
1577 A, 1581 A,
1578 B, 1582 B,
@@ -1583,14 +1587,14 @@ mod tests {
1583 Either::B => (), 1587 Either::B => (),
1584 } 1588 }
1585 } 1589 }
1586 "; 1590 ",
1587 1591 );
1588 check_no_diagnostic(content);
1589 } 1592 }
1590 1593
1591 #[test] 1594 #[test]
1592 fn expr_partially_diverges() { 1595 fn expr_partially_diverges() {
1593 let content = r" 1596 check_no_diagnostic(
1597 r"
1594 enum Either<T> { 1598 enum Either<T> {
1595 A(T), 1599 A(T),
1596 B, 1600 B,
@@ -1604,14 +1608,14 @@ mod tests {
1604 Either::B => 0, 1608 Either::B => 0,
1605 } 1609 }
1606 } 1610 }
1607 "; 1611 ",
1608 1612 );
1609 check_no_diagnostic(content);
1610 } 1613 }
1611 1614
1612 #[test] 1615 #[test]
1613 fn enum_record_no_arms() { 1616 fn enum_record_no_arms() {
1614 let content = r" 1617 check_diagnostic(
1618 r"
1615 enum Either { 1619 enum Either {
1616 A { foo: bool }, 1620 A { foo: bool },
1617 B, 1621 B,
@@ -1621,14 +1625,14 @@ mod tests {
1621 match a { 1625 match a {
1622 } 1626 }
1623 } 1627 }
1624 "; 1628 ",
1625 1629 );
1626 check_diagnostic(content);
1627 } 1630 }
1628 1631
1629 #[test] 1632 #[test]
1630 fn enum_record_missing_arms() { 1633 fn enum_record_missing_arms() {
1631 let content = r" 1634 check_diagnostic(
1635 r"
1632 enum Either { 1636 enum Either {
1633 A { foo: bool }, 1637 A { foo: bool },
1634 B, 1638 B,
@@ -1639,14 +1643,14 @@ mod tests {
1639 Either::A { foo: true } => (), 1643 Either::A { foo: true } => (),
1640 } 1644 }
1641 } 1645 }
1642 "; 1646 ",
1643 1647 );
1644 check_diagnostic(content);
1645 } 1648 }
1646 1649
1647 #[test] 1650 #[test]
1648 fn enum_record_no_diagnostic() { 1651 fn enum_record_no_diagnostic() {
1649 let content = r" 1652 check_no_diagnostic(
1653 r"
1650 enum Either { 1654 enum Either {
1651 A { foo: bool }, 1655 A { foo: bool },
1652 B, 1656 B,
@@ -1659,14 +1663,17 @@ mod tests {
1659 Either::B => (), 1663 Either::B => (),
1660 } 1664 }
1661 } 1665 }
1662 "; 1666 ",
1663 1667 );
1664 check_no_diagnostic(content);
1665 } 1668 }
1666 1669
1667 #[test] 1670 #[test]
1668 fn enum_record_missing_field_no_diagnostic() { 1671 fn enum_record_missing_field_no_diagnostic() {
1669 let content = r" 1672 // When `Either::A` is missing a struct member, we don't want
1673 // to fire the missing match arm diagnostic. This should fire
1674 // some other diagnostic.
1675 check_no_diagnostic(
1676 r"
1670 enum Either { 1677 enum Either {
1671 A { foo: bool }, 1678 A { foo: bool },
1672 B, 1679 B,
@@ -1678,17 +1685,16 @@ mod tests {
1678 Either::B => (), 1685 Either::B => (),
1679 } 1686 }
1680 } 1687 }
1681 "; 1688 ",
1682 1689 );
1683 // When `Either::A` is missing a struct member, we don't want
1684 // to fire the missing match arm diagnostic. This should fire
1685 // some other diagnostic.
1686 check_no_diagnostic(content);
1687 } 1690 }
1688 1691
1689 #[test] 1692 #[test]
1690 fn enum_record_missing_field_missing_match_arm() { 1693 fn enum_record_missing_field_missing_match_arm() {
1691 let content = r" 1694 // Even though `Either::A` is missing fields, we still want to fire
1695 // the missing arm diagnostic here, since we know `Either::B` is missing.
1696 check_diagnostic(
1697 r"
1692 enum Either { 1698 enum Either {
1693 A { foo: bool }, 1699 A { foo: bool },
1694 B, 1700 B,
@@ -1699,16 +1705,14 @@ mod tests {
1699 Either::A { } => (), 1705 Either::A { } => (),
1700 } 1706 }
1701 } 1707 }
1702 "; 1708 ",
1703 1709 );
1704 // Even though `Either::A` is missing fields, we still want to fire
1705 // the missing arm diagnostic here, since we know `Either::B` is missing.
1706 check_diagnostic(content);
1707 } 1710 }
1708 1711
1709 #[test] 1712 #[test]
1710 fn enum_record_no_diagnostic_wild() { 1713 fn enum_record_no_diagnostic_wild() {
1711 let content = r" 1714 check_no_diagnostic(
1715 r"
1712 enum Either { 1716 enum Either {
1713 A { foo: bool }, 1717 A { foo: bool },
1714 B, 1718 B,
@@ -1720,14 +1724,14 @@ mod tests {
1720 Either::B => (), 1724 Either::B => (),
1721 } 1725 }
1722 } 1726 }
1723 "; 1727 ",
1724 1728 );
1725 check_no_diagnostic(content);
1726 } 1729 }
1727 1730
1728 #[test] 1731 #[test]
1729 fn enum_record_fields_out_of_order_missing_arm() { 1732 fn enum_record_fields_out_of_order_missing_arm() {
1730 let content = r" 1733 check_diagnostic(
1734 r"
1731 enum Either { 1735 enum Either {
1732 A { foo: bool, bar: () }, 1736 A { foo: bool, bar: () },
1733 B, 1737 B,
@@ -1739,14 +1743,14 @@ mod tests {
1739 Either::A { foo: true, bar: () } => (), 1743 Either::A { foo: true, bar: () } => (),
1740 } 1744 }
1741 } 1745 }
1742 "; 1746 ",
1743 1747 );
1744 check_diagnostic(content);
1745 } 1748 }
1746 1749
1747 #[test] 1750 #[test]
1748 fn enum_record_fields_out_of_order_no_diagnostic() { 1751 fn enum_record_fields_out_of_order_no_diagnostic() {
1749 let content = r" 1752 check_no_diagnostic(
1753 r"
1750 enum Either { 1754 enum Either {
1751 A { foo: bool, bar: () }, 1755 A { foo: bool, bar: () },
1752 B, 1756 B,
@@ -1759,89 +1763,89 @@ mod tests {
1759 Either::B => (), 1763 Either::B => (),
1760 } 1764 }
1761 } 1765 }
1762 "; 1766 ",
1763 1767 );
1764 check_no_diagnostic(content);
1765 } 1768 }
1766 1769
1767 #[test] 1770 #[test]
1768 fn enum_record_ellipsis_missing_arm() { 1771 fn enum_record_ellipsis_missing_arm() {
1769 let content = r" 1772 check_diagnostic(
1770 enum Either { 1773 r"
1771 A { foo: bool, bar: bool }, 1774 enum Either {
1772 B, 1775 A { foo: bool, bar: bool },
1773 } 1776 B,
1774 fn test_fn() { 1777 }
1775 match Either::B { 1778 fn test_fn() {
1776 Either::A { foo: true, .. } => (), 1779 match Either::B {
1777 Either::B => (), 1780 Either::A { foo: true, .. } => (),
1778 } 1781 Either::B => (),
1779 } 1782 }
1780 "; 1783 }
1781 1784 ",
1782 check_diagnostic(content); 1785 );
1783 } 1786 }
1784 1787
1785 #[test] 1788 #[test]
1786 fn enum_record_ellipsis_no_diagnostic() { 1789 fn enum_record_ellipsis_no_diagnostic() {
1787 let content = r" 1790 check_no_diagnostic(
1788 enum Either { 1791 r"
1789 A { foo: bool, bar: bool }, 1792 enum Either {
1790 B, 1793 A { foo: bool, bar: bool },
1791 } 1794 B,
1792 fn test_fn() { 1795 }
1793 let a = Either::A { foo: true }; 1796 fn test_fn() {
1794 match a { 1797 let a = Either::A { foo: true };
1795 Either::A { foo: true, .. } => (), 1798 match a {
1796 Either::A { foo: false, .. } => (), 1799 Either::A { foo: true, .. } => (),
1797 Either::B => (), 1800 Either::A { foo: false, .. } => (),
1798 } 1801 Either::B => (),
1799 } 1802 }
1800 "; 1803 }
1801 1804 ",
1802 check_no_diagnostic(content); 1805 );
1803 } 1806 }
1804 1807
1805 #[test] 1808 #[test]
1806 fn enum_record_ellipsis_all_fields_missing_arm() { 1809 fn enum_record_ellipsis_all_fields_missing_arm() {
1807 let content = r" 1810 check_diagnostic(
1808 enum Either { 1811 r"
1809 A { foo: bool, bar: bool }, 1812 enum Either {
1810 B, 1813 A { foo: bool, bar: bool },
1811 } 1814 B,
1812 fn test_fn() { 1815 }
1813 let a = Either::B; 1816 fn test_fn() {
1814 match a { 1817 let a = Either::B;
1815 Either::A { .. } => (), 1818 match a {
1816 } 1819 Either::A { .. } => (),
1817 } 1820 }
1818 "; 1821 }
1819 1822 ",
1820 check_diagnostic(content); 1823 );
1821 } 1824 }
1822 1825
1823 #[test] 1826 #[test]
1824 fn enum_record_ellipsis_all_fields_no_diagnostic() { 1827 fn enum_record_ellipsis_all_fields_no_diagnostic() {
1825 let content = r" 1828 check_no_diagnostic(
1826 enum Either { 1829 r"
1827 A { foo: bool, bar: bool }, 1830 enum Either {
1828 B, 1831 A { foo: bool, bar: bool },
1829 } 1832 B,
1830 fn test_fn() { 1833 }
1831 let a = Either::B; 1834 fn test_fn() {
1832 match a { 1835 let a = Either::B;
1833 Either::A { .. } => (), 1836 match a {
1834 Either::B => (), 1837 Either::A { .. } => (),
1835 } 1838 Either::B => (),
1836 } 1839 }
1837 "; 1840 }
1838 1841 ",
1839 check_no_diagnostic(content); 1842 );
1840 } 1843 }
1841 1844
1842 #[test] 1845 #[test]
1843 fn enum_tuple_partial_ellipsis_no_diagnostic() { 1846 fn enum_tuple_partial_ellipsis_no_diagnostic() {
1844 let content = r" 1847 check_no_diagnostic(
1848 r"
1845 enum Either { 1849 enum Either {
1846 A(bool, bool, bool, bool), 1850 A(bool, bool, bool, bool),
1847 B, 1851 B,
@@ -1855,14 +1859,14 @@ mod tests {
1855 Either::B => {}, 1859 Either::B => {},
1856 } 1860 }
1857 } 1861 }
1858 "; 1862 ",
1859 1863 );
1860 check_no_diagnostic(content);
1861 } 1864 }
1862 1865
1863 #[test] 1866 #[test]
1864 fn enum_tuple_partial_ellipsis_2_no_diagnostic() { 1867 fn enum_tuple_partial_ellipsis_2_no_diagnostic() {
1865 let content = r" 1868 check_no_diagnostic(
1869 r"
1866 enum Either { 1870 enum Either {
1867 A(bool, bool, bool, bool), 1871 A(bool, bool, bool, bool),
1868 B, 1872 B,
@@ -1876,14 +1880,14 @@ mod tests {
1876 Either::B => {}, 1880 Either::B => {},
1877 } 1881 }
1878 } 1882 }
1879 "; 1883 ",
1880 1884 );
1881 check_no_diagnostic(content);
1882 } 1885 }
1883 1886
1884 #[test] 1887 #[test]
1885 fn enum_tuple_partial_ellipsis_missing_arm() { 1888 fn enum_tuple_partial_ellipsis_missing_arm() {
1886 let content = r" 1889 check_diagnostic(
1890 r"
1887 enum Either { 1891 enum Either {
1888 A(bool, bool, bool, bool), 1892 A(bool, bool, bool, bool),
1889 B, 1893 B,
@@ -1896,14 +1900,14 @@ mod tests {
1896 Either::B => {}, 1900 Either::B => {},
1897 } 1901 }
1898 } 1902 }
1899 "; 1903 ",
1900 1904 );
1901 check_diagnostic(content);
1902 } 1905 }
1903 1906
1904 #[test] 1907 #[test]
1905 fn enum_tuple_partial_ellipsis_2_missing_arm() { 1908 fn enum_tuple_partial_ellipsis_2_missing_arm() {
1906 let content = r" 1909 check_diagnostic(
1910 r"
1907 enum Either { 1911 enum Either {
1908 A(bool, bool, bool, bool), 1912 A(bool, bool, bool, bool),
1909 B, 1913 B,
@@ -1916,14 +1920,14 @@ mod tests {
1916 Either::B => {}, 1920 Either::B => {},
1917 } 1921 }
1918 } 1922 }
1919 "; 1923 ",
1920 1924 );
1921 check_diagnostic(content);
1922 } 1925 }
1923 1926
1924 #[test] 1927 #[test]
1925 fn enum_tuple_ellipsis_no_diagnostic() { 1928 fn enum_tuple_ellipsis_no_diagnostic() {
1926 let content = r" 1929 check_no_diagnostic(
1930 r"
1927 enum Either { 1931 enum Either {
1928 A(bool, bool, bool, bool), 1932 A(bool, bool, bool, bool),
1929 B, 1933 B,
@@ -1934,51 +1938,51 @@ mod tests {
1934 Either::B => {}, 1938 Either::B => {},
1935 } 1939 }
1936 } 1940 }
1937 "; 1941 ",
1938 1942 );
1939 check_no_diagnostic(content);
1940 } 1943 }
1941 1944
1942 #[test] 1945 #[test]
1943 fn enum_never() { 1946 fn enum_never() {
1944 let content = r" 1947 check_no_diagnostic(
1948 r"
1945 enum Never {} 1949 enum Never {}
1946 1950
1947 fn test_fn(never: Never) { 1951 fn test_fn(never: Never) {
1948 match never {} 1952 match never {}
1949 } 1953 }
1950 "; 1954 ",
1951 1955 );
1952 check_no_diagnostic(content);
1953 } 1956 }
1954 1957
1955 #[test] 1958 #[test]
1956 fn type_never() { 1959 fn type_never() {
1957 let content = r" 1960 check_no_diagnostic(
1961 r"
1958 fn test_fn(never: !) { 1962 fn test_fn(never: !) {
1959 match never {} 1963 match never {}
1960 } 1964 }
1961 "; 1965 ",
1962 1966 );
1963 check_no_diagnostic(content);
1964 } 1967 }
1965 1968
1966 #[test] 1969 #[test]
1967 fn enum_never_ref() { 1970 fn enum_never_ref() {
1968 let content = r" 1971 check_no_diagnostic(
1972 r"
1969 enum Never {} 1973 enum Never {}
1970 1974
1971 fn test_fn(never: &Never) { 1975 fn test_fn(never: &Never) {
1972 match never {} 1976 match never {}
1973 } 1977 }
1974 "; 1978 ",
1975 1979 );
1976 check_no_diagnostic(content);
1977 } 1980 }
1978 1981
1979 #[test] 1982 #[test]
1980 fn expr_diverges_missing_arm() { 1983 fn expr_diverges_missing_arm() {
1981 let content = r" 1984 check_no_diagnostic(
1985 r"
1982 enum Either { 1986 enum Either {
1983 A, 1987 A,
1984 B, 1988 B,
@@ -1988,9 +1992,27 @@ mod tests {
1988 Either::A => (), 1992 Either::A => (),
1989 } 1993 }
1990 } 1994 }
1991 "; 1995 ",
1996 );
1997 }
1998
1999 #[test]
2000 fn or_pattern_panic() {
2001 check_no_diagnostic(
2002 r"
2003 pub enum Category {
2004 Infinity,
2005 Zero,
2006 }
1992 2007
1993 check_no_diagnostic(content); 2008 fn panic(a: Category, b: Category) {
2009 match (a, b) {
2010 (Category::Zero | Category::Infinity, _) => {}
2011 (_, Category::Zero | Category::Infinity) => {}
2012 }
2013 }
2014 ",
2015 );
1994 } 2016 }
1995} 2017}
1996 2018
@@ -2010,23 +2032,26 @@ mod false_negatives {
2010 2032
2011 #[test] 2033 #[test]
2012 fn integers() { 2034 fn integers() {
2013 let content = r" 2035 // This is a false negative.
2036 // We don't currently check integer exhaustiveness.
2037 check_no_diagnostic(
2038 r"
2014 fn test_fn() { 2039 fn test_fn() {
2015 match 5 { 2040 match 5 {
2016 10 => (), 2041 10 => (),
2017 11..20 => (), 2042 11..20 => (),
2018 } 2043 }
2019 } 2044 }
2020 "; 2045 ",
2021 2046 );
2022 // This is a false negative.
2023 // We don't currently check integer exhaustiveness.
2024 check_no_diagnostic(content);
2025 } 2047 }
2026 2048
2027 #[test] 2049 #[test]
2028 fn internal_or() { 2050 fn internal_or() {
2029 let content = r" 2051 // This is a false negative.
2052 // We do not currently handle patterns with internal `or`s.
2053 check_no_diagnostic(
2054 r"
2030 fn test_fn() { 2055 fn test_fn() {
2031 enum Either { 2056 enum Either {
2032 A(bool), 2057 A(bool),
@@ -2036,16 +2061,18 @@ mod false_negatives {
2036 Either::A(true | false) => (), 2061 Either::A(true | false) => (),
2037 } 2062 }
2038 } 2063 }
2039 "; 2064 ",
2040 2065 );
2041 // This is a false negative.
2042 // We do not currently handle patterns with internal `or`s.
2043 check_no_diagnostic(content);
2044 } 2066 }
2045 2067
2046 #[test] 2068 #[test]
2047 fn expr_loop_missing_arm() { 2069 fn expr_loop_missing_arm() {
2048 let content = r" 2070 // This is a false negative.
2071 // We currently infer the type of `loop { break Foo::A }` to `!`, which
2072 // causes us to skip the diagnostic since `Either::A` doesn't type check
2073 // with `!`.
2074 check_diagnostic(
2075 r"
2049 enum Either { 2076 enum Either {
2050 A, 2077 A,
2051 B, 2078 B,
@@ -2055,48 +2082,46 @@ mod false_negatives {
2055 Either::A => (), 2082 Either::A => (),
2056 } 2083 }
2057 } 2084 }
2058 "; 2085 ",
2059 2086 );
2060 // This is a false negative.
2061 // We currently infer the type of `loop { break Foo::A }` to `!`, which
2062 // causes us to skip the diagnostic since `Either::A` doesn't type check
2063 // with `!`.
2064 check_diagnostic(content);
2065 } 2087 }
2066 2088
2067 #[test] 2089 #[test]
2068 fn tuple_of_bools_with_ellipsis_at_end_missing_arm() { 2090 fn tuple_of_bools_with_ellipsis_at_end_missing_arm() {
2069 let content = r" 2091 // This is a false negative.
2092 // We don't currently handle tuple patterns with ellipsis.
2093 check_no_diagnostic(
2094 r"
2070 fn test_fn() { 2095 fn test_fn() {
2071 match (false, true, false) { 2096 match (false, true, false) {
2072 (false, ..) => {}, 2097 (false, ..) => {},
2073 } 2098 }
2074 } 2099 }
2075 "; 2100 ",
2076 2101 );
2077 // This is a false negative.
2078 // We don't currently handle tuple patterns with ellipsis.
2079 check_no_diagnostic(content);
2080 } 2102 }
2081 2103
2082 #[test] 2104 #[test]
2083 fn tuple_of_bools_with_ellipsis_at_beginning_missing_arm() { 2105 fn tuple_of_bools_with_ellipsis_at_beginning_missing_arm() {
2084 let content = r" 2106 // This is a false negative.
2107 // We don't currently handle tuple patterns with ellipsis.
2108 check_no_diagnostic(
2109 r"
2085 fn test_fn() { 2110 fn test_fn() {
2086 match (false, true, false) { 2111 match (false, true, false) {
2087 (.., false) => {}, 2112 (.., false) => {},
2088 } 2113 }
2089 } 2114 }
2090 "; 2115 ",
2091 2116 );
2092 // This is a false negative.
2093 // We don't currently handle tuple patterns with ellipsis.
2094 check_no_diagnostic(content);
2095 } 2117 }
2096 2118
2097 #[test] 2119 #[test]
2098 fn struct_missing_arm() { 2120 fn struct_missing_arm() {
2099 let content = r" 2121 // This is a false negative.
2122 // We don't currently handle structs.
2123 check_no_diagnostic(
2124 r"
2100 struct Foo { 2125 struct Foo {
2101 a: bool, 2126 a: bool,
2102 } 2127 }
@@ -2105,10 +2130,7 @@ mod false_negatives {
2105 Foo { a: true } => {}, 2130 Foo { a: true } => {},
2106 } 2131 }
2107 } 2132 }
2108 "; 2133 ",
2109 2134 );
2110 // This is a false negative.
2111 // We don't currently handle structs.
2112 check_no_diagnostic(content);
2113 } 2135 }
2114} 2136}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 02:55:26 +0000