Differences

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--- tutorial:mixin_injects [2020/02/07 01:58] – draylar
+++ tutorial:mixin_injects [2020/05/28 18:28] – b0undarybreaker
@@ Line 19: / Line 19: @@
 | TAIL | Before the final return statement |
-In the case of injection points that reference statements or members, the target value can be set inside //@At//.
+In the case of injection points that reference statements or members, the target value can be set inside //@At//. Target value is specified using JVM bytecode descriptors.
+Oracle defines the following [[https://docs.oracle.com/javase/specs/jvms/se14/html/jvms-4.html#jvms-4.3.2|field descriptors]]:
+^ Descriptor ^ Primitive ^ Description ^
+| B | byte | signed byte |
+| C | char | Unicode character code point in the Basic Multilingual Plane, encoded with UTF-16 |
+| D | double | double-precision floating-point value |
+| F | float | single-precision floating-point value |
+| I | int | integer |
+| J | long | long integer |
+| L//ClassName//; | reference | an instance of //ClassName// |
+| S | short | signed short |
+| Z | boolean | ''true'' or ''false'' |
+| [FieldType | reference | one array dimension |
+A method descriptor is comprised of the method name, followed by a set of parentheses containing the input types, followed by the output type. A method defined in Java as ''Object m(int i, double d, Thread t)'' would have the method descriptor ''m(IDLjava/lang/Thread;)Ljava/lang/Object;''.
 //@Inject// methods always have a void return type. The method name does not matter; using something that describes what the inject does is best. The target method's arguments are placed first in the method's header, followed by a ''CallbackInfo'' object. If the target method has a return type (T), ''CallbackInfoReturnable<T>'' is used instead of ''CallbackInfo''.