dsl: add ExprType.HasMethod() #349
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HasMethod reports whether a type has a given method. Unlike Implements(), it will work for both value and pointer types. fn argument is a function signature, like `WriteString(string) (int, error)`. It can also be in form of a method reference for importable types: `io.StringWriter.WriteString`. To avoid confusion with Implements() method, here is a hint when to use which: - To check if it's possible to call F on x, use HasMethod(F) - To check if x can be passed as I interface, use Implements(I) Refs #331
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HasMethod reports whether a type has a given method.
Unlike Implements(), it will work for both value and pointer types.
fn argument is a function signature, like
WriteString(string) (int, error).It can also be in form of a method reference for importable types:
io.StringWriter.WriteString.To avoid confusion with Implements() method, here is a hint when to use which:
Refs #331