Unable to compile MySQL

[lavoiesl]

Trying to use the MySQL grammar: https://github.com/antlr/grammars-v4/tree/master/sql/mysql/Positive-Technologies

Using rake task and the extconf.rb from https://gist.github.com/lavoiesl/efed2ed8886b32d778c5fd30bdb16390

$ bin/rake antlr:runtime:clone # ok
$ bin/rake antlr:mysql:generate # ok


$ bin/rake antlr:mysql:compile
Running via Spring preloader in process 97444
checking for rice/rice.hpp in /Users/seb/.gem/ruby/3.2.2/gems/rice-4.3.1/include... yes
checking for -lc++... yes
checking for -lstdc++... yes
creating Makefile
compiling my_sql_parser.cpp
compiling ../lib/antlr4-cpp-runtime/Vocabulary.cpp
compiling ../lib/antlr4-cpp-runtime/WritableToken.cpp
...
compiling ../lib/antlr4-cpp-runtime/atn/LexerCustomAction.cpp
compiling ../lib/antlr4-cpp-runtime/atn/LexerIndexedCustomAction.cpp
compiling ../lib/antlr4-cpp-runtime/atn/LexerModeAction.cpp
my_sql_parser.cpp:41070:12: error: expected ')'
    return Qnil;
           ^
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/special_consts.h:60:25: note: expanded from macro 'Qnil'
#define Qnil            RUBY_Qnil              /**< @old{RUBY_Qnil} */
                        ^
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/special_consts.h:358:40: note: expanded from macro 'RUBY_Qnil'
#define RUBY_Qnil   RBIMPL_CAST((VALUE)RUBY_Qnil)
                                       ^
my_sql_parser.cpp:41070:12: note: to match this '('
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/special_consts.h:60:25: note: expanded from macro 'Qnil'
#define Qnil            RUBY_Qnil              /**< @old{RUBY_Qnil} */
                        ^
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/special_consts.h:358:21: note: expanded from macro 'RUBY_Qnil'
#define RUBY_Qnil   RBIMPL_CAST((VALUE)RUBY_Qnil)
                    ^
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/cast.h:43:5: note: expanded from macro 'RBIMPL_CAST'
    (expr)                                  \
    ^
my_sql_parser.cpp:41070:12: error: reference to non-static member function must be called; did you mean to call it with no arguments?
    return Qnil;
           ^~~~
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/special_consts.h:60:25: note: expanded from macro 'Qnil'
#define Qnil            RUBY_Qnil              /**< @old{RUBY_Qnil} */
                        ^~~~~~~~~
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/special_consts.h:358:33: note: expanded from macro 'RUBY_Qnil'
#define RUBY_Qnil   RBIMPL_CAST((VALUE)RUBY_Qnil)
                                ^~~~~~~
/opt/rubies/3.2.2/include/ruby-3.2.0/ruby/internal/cast.h:43:6: note: expanded from macro 'RBIMPL_CAST'
    (expr)                                  \
     ^~~~
my_sql_parser.cpp:41076:12: error: expected ')'
    return Qnil;
           ^

(Many errors like that)

fatal error: too many errors emitted, stopping now [-ferror-limit=]
compiling ../lib/antlr4-cpp-runtime/atn/LexerMoreAction.cpp
compiling ../lib/antlr4-cpp-runtime/atn/LexerPopModeAction.cpp
compiling ../lib/antlr4-cpp-runtime/atn/LexerPushModeAction.cpp
compiling ../lib/antlr4-cpp-runtime/atn/LexerSkipAction.cpp
compiling ../lib/antlr4-cpp-runtime/atn/LexerTypeAction.cpp
compiling ../lib/antlr4-cpp-runtime/atn/LookaheadEventInfo.cpp
compiling ../lib/antlr4-cpp-runtime/atn/NotSetTransition.cpp
compiling ../lib/antlr4-cpp-runtime/atn/OrderedATNConfigSet.cpp
compiling ../lib/antlr4-cpp-runtime/atn/ParseInfo.cpp
compiling ../lib/antlr4-cpp-runtime/atn/ParserATNSimulator.cpp
20 errors generated.
make: *** [my_sql_parser.o] Error 1
make: *** Waiting for unfinished jobs....

You can find the full output in the Gist above.

---

I tested similar steps with the lua parser used in the spec of this repo and it compiles just fine.

I suspect that the MySQL grammar is generating invalid C++, but the file is enormous and I don't really speak C++.

---

I found #15 and antlr/grammars-v4#1905, which seem related, but the MySQL grammar already uses NULL_LITERAL and I tried renaming (TRUE|FALSE) to *_LITERAL in the lexer and parser, but it didn't change anything.