Merge #524

524:  Implement array inference r=flodiebold a=h-michael

related #394

Co-authored-by: Hirokazu Hata <[email protected]>

2 files changed, 78 insertions, 0 deletions

diff --git a/crates/ra_hir/src/ty/tests.rs b/crates/ra_hir/src/ty/tests.rs
index 5d7bc25cc..affd63a85 100644
--- a/crates/ra_hir/src/ty/tests.rs
+++ b/crates/ra_hir/src/ty/tests.rs
@@ -334,6 +334,32 @@ fn test(x: &str, y: isize) {
     );
 }
 
+#[test]
+fn infer_array() {
+    check_inference(
+        r#"
+fn test(x: &str, y: isize) {
+    let a = [x];
+    let b = [a, a];
+    let c = [b, b];
+
+    let d = [y, 1, 2, 3];
+    let d = [1, y, 2, 3];
+    let e = [y];
+    let f = [d, d];
+    let g = [e, e];
+
+    let h = [1, 2];
+    let i = ["a", "b"];
+
+    let b = [a, ["b"]];
+    let x: [u8; 0] = [];
+}
+"#,
+        "array.txt",
+    );
+}
+
 fn infer(content: &str) -> String {
     let (db, _, file_id) = MockDatabase::with_single_file(content);
     let source_file = db.source_file(file_id);
diff --git a/crates/ra_hir/src/ty/tests/data/array.txt b/crates/ra_hir/src/ty/tests/data/array.txt
new file mode 100644
index 000000000..acdf74ba4
--- /dev/null
+++ b/crates/ra_hir/src/ty/tests/data/array.txt
@@ -0,0 +1,52 @@
+[9; 10) 'x': &str
+[18; 19) 'y': isize
+[28; 293) '{     ... []; }': ()
+[38; 39) 'a': [&str]
+[42; 45) '[x]': [&str]
+[43; 44) 'x': &str
+[55; 56) 'b': [[&str]]
+[59; 65) '[a, a]': [[&str]]
+[60; 61) 'a': [&str]
+[63; 64) 'a': [&str]
+[75; 76) 'c': [[[&str]]]
+[79; 85) '[b, b]': [[[&str]]]
+[80; 81) 'b': [[&str]]
+[83; 84) 'b': [[&str]]
+[96; 97) 'd': [isize]
+[100; 112) '[y, 1, 2, 3]': [isize]
+[101; 102) 'y': isize
+[104; 105) '1': isize
+[107; 108) '2': isize
+[110; 111) '3': isize
+[122; 123) 'd': [isize]
+[126; 138) '[1, y, 2, 3]': [isize]
+[127; 128) '1': isize
+[130; 131) 'y': isize
+[133; 134) '2': isize
+[136; 137) '3': isize
+[148; 149) 'e': [isize]
+[152; 155) '[y]': [isize]
+[153; 154) 'y': isize
+[165; 166) 'f': [[isize]]
+[169; 175) '[d, d]': [[isize]]
+[170; 171) 'd': [isize]
+[173; 174) 'd': [isize]
+[185; 186) 'g': [[isize]]
+[189; 195) '[e, e]': [[isize]]
+[190; 191) 'e': [isize]
+[193; 194) 'e': [isize]
+[206; 207) 'h': [i32]
+[210; 216) '[1, 2]': [i32]
+[211; 212) '1': i32
+[214; 215) '2': i32
+[226; 227) 'i': [&str]
+[230; 240) '["a", "b"]': [&str]
+[231; 234) '"a"': &str
+[236; 239) '"b"': &str
+[251; 252) 'b': [[&str]]
+[255; 265) '[a, ["b"]]': [[&str]]
+[256; 257) 'a': [&str]
+[259; 264) '["b"]': [&str]
+[260; 263) '"b"': &str
+[275; 276) 'x': [u8]
+[288; 290) '[]': [u8]