Mapping to Java

The GlueGun IDL is mapped to Java as follows:

• Primitive types:
  • i8, u8 to Java byte
  • i16, u16 to Java short
  • i32, u32 to Java int
  • u64, u64 to Java long
  • f32 to Java float
  • f64 to Java double
  • char to Java int (a Java char is not a 32-bit unicode code point, and new Java functions operating on Unicode characters use int)
• Collection types map to Java collections:
  • A Rust Vec<T> to a Java ArrayList<T>
  • ...
• Tuples and public structs map to Java classes with public fields
• Enums with associated data map to an abstract Java base class and public-struct-like subclasses for each variant
• Enums map without associated data map to Java enums
• Instances of the class pattern map to Java classes with methods