add more dbtype support for tensor (#468)

Author: any35

src/tensor/npy.rs

@@ -129,15 +129,23 @@ impl Header {
                 if descr.starts_with('>') {
                     return Err(TchError::FileFormat(format!("little-endian descr {}", descr)));
                 }
+                // the only supported types in tensor are:
+                //     float64, float32, float16,
+                //     complex64, complex128,
+                //     int64, int32, int16, int8,
+                //     uint8, and bool.
                 match descr.trim_matches(|c: char| c == '=' || c == '<' || c == '|') {
-                    "f2" => Kind::Half,
-                    "f4" => Kind::Float,
-                    "f8" => Kind::Double,
-                    "i4" => Kind::Int,
-                    "i8" => Kind::Int64,
-                    "i2" => Kind::Int16,
-                    "i1" => Kind::Int8,
-                    "u1" => Kind::Uint8,
+                    "e" | "f2" => Kind::Half,
+                    "f" | "f4" => Kind::Float,
+                    "d" | "f8" => Kind::Double,
+                    "i" | "i4" => Kind::Int,
+                    "q" | "i8" => Kind::Int64,
+                    "h" | "i2" => Kind::Int16,
+                    "b" | "i1" => Kind::Int8,
+                    "B" | "u1" => Kind::Uint8,
+                    "?" | "b1" => Kind::Bool,
+                    "F" | "F4" => Kind::ComplexFloat,
+                    "D" | "F8" => Kind::ComplexDouble,
                     descr => {
                         return Err(TchError::FileFormat(format!("unrecognized descr {}", descr)))
                     }