internal/

About

Trap is the core the xgo runtime.

When a function is called, it's control flow will first be transferred to Trap.

Then Trap check if there is any interceptor, including system defined interceptors like Mock and Trace, as well as user defined interceptors by calling Trap.AddInterceptor().

If any, it will then forward call to these interceptors, until all interceptors returned, or some interceptor returns trap.ErrAbort in the middle.

Inspect(f)

the trap.Inspect(fn) implements a way to retrieve func info. It has different internal paths for these function types:

• package level function
  • PC lookup
• struct method
  • -fm suffix check
  • struct.method proto existence check
  • dynamic retrieval
• interface method
  • -fm suffix check
  • interface proto existence check
  • dynamic retrieval
• closure
  • closure is registered using IR
  • PC lookup
• generic function
  • fullName parsing to de-generic
  • generic template existence check
  • no dynamic retrieval since no recv, but is legal to do so
• generic struct method
  • -fm suffix check
  • fullName parsing to de-generic
  • generic method template existence check
  • dynamic retrieval just for receiver
• generic interface method
  • to be supported