A variety of grammars setup for testing performance of golang target for Antlr4. Base structure is:

   grammar_test.go
   grammar/*.g4, build.sh, data/

The test files only include Benchmark targets. Run via:

  % go test -run=None -bench=. <grammar>_test.go

As of 9/28/2021 - the following are useable:

   c_test.go
   verilog_test.go
   sv2017_test.go

The following show fails wrt to the golang generated code (primarily via function overloading which is not supported in golang):

   java8_test.go
   cpp14_test.go

java8/java8_parser.go:20936:6: NewEmptyStatementContext redeclared in this block previous declaration at parser/java8_parser.go:20275:34

cpp14/cpp14_parser.go:8788:6: NewExpressionContext redeclared in this block previous declaration at parser/cpp14_parser.go:5218:6 cpp14/cpp14_parser.go:12221:6: NewEmptyDeclarationContext redeclared in this block previous declaration at parser/cpp14_parser.go:11278:36 cpp14/cpp14_parser.go:18851:6: NewDeclaratorContext redeclared in this block previous declaration at parser/cpp14_parser.go:5651:6 cpp14/cpp14_parser.go:22313:6: NewInitializerContext redeclared in this block previous declaration at parser/cpp14_parser.go:6005:6 cpp14/cpp14parser_base_listener.go:150:58: *NewExpressionContext is not a type cpp14/cpp14parser_base_listener.go:153:57: *NewExpressionContext is not a type cpp14/cpp14parser_base_listener.go:168:58: *NewDeclaratorContext is not a type cpp14/cpp14parser_base_listener.go:171:57: *NewDeclaratorContext is not a type cpp14/cpp14parser_base_listener.go:180:59: *NewInitializerContext is not a type cpp14/cpp14parser_base_listener.go:183:58: *NewInitializerContext is not a type cpp14/cpp14parser_base_listener.go:183:58: too many errors