An alternative to both Lisp-like macros and code generation is to trigger macros via annotations in the syntax, and for the macro to manipulate the AST directly

An alternative to both Lisp-like macros and code generation is to trigger macros via annotations in the syntax, and for the macro to manipulate the AST directly using the "go/ast" package. Apache Groovy, which has the same curly-braces style syntax as Golang, does it like this.