Rule numbers: constants vs static members

[BurtHarris]

In ActionExpr.g4, I've got the following:

expr
    returns[v: number]:
    a = expr op = ('*' | '/') b = expr {
                                   if ( $op.type==MUL ) $v = $a.v * $b.v;
                                   else $v = $a.v / $b.v;
                                   }
    | a = expr op = ('+' | '-') b = expr {
                                   if ( $op.type==ADD ) $v = $a.v + $b.v;
                                   else $v = $a.v - $b.v;
                                   }
    | INT {$v = Number.parseInt($INT.text,10);}
    | ID {$v = this.memory[$ID.text];}
    | '(' e = expr ')' {$v = $e.v;};

MUL: '*'; // assigns token name to '*' used above in grammar
DIV: '/';
ADD: '+';
SUB: '-';

The generated code from is flagged by Typescript on the naked MULand ADDin the actions, suggesting "Cannot find name 'ADD'. Did you mean the static member 'ActionExprParser.ADD'?"

We might make actions including this sort of code work by declaring constants for ADD and MUL in the outermost scope of the generated parser, or perhaps even a const enum (with a consistant name!)

[BurtHarris]

Workaround in .g4 file:

stat:
    expr NEWLINE {console.log($expr.v);}
    | ID '=' expr NEWLINE { this.memory[$ID.text as string] = $expr.v; }
    | NEWLINE;