如何为ANTLR4目标Go调试监听器

我正在试图弄清楚，为什么当触发每个规则而不是特定规则时，我的监听者不触发规则.我在http://lab.antlr.org/分钟测试了我的语法作品

谢谢.

这张照片...

func (f *FSLListener) EnterEveryRule(ctx antlr.ParserRuleContext) {
    fmt.Printf("EnterEveryRule %v\n", ctx.GetText())
}

但这并不是

func (f *FSLListener) ExitVar_assignment(ctx *parser.Var_assignmentContext) error {
    fmt.Printf("Complete var assignment: %s\n", ctx.GetText())
    // ... updated this line to reflect that I was handling this error which is why I didn't see any compiler errors
    return nil 
}

遵循https://github.com/antlr/antlr4/blob/master/doc/go-target.md中的示例监听程序

我的语法是

parser grammar fslParser;

options { tokenVocab=fsl词法分析器; }


r: script* EOF;

script: var_assignment* init_function function_definition*;

var_assignment: VAR VALUE;
init_function: INIT cmd_list RBRACK;
function_definition: VALIDFUNCTIONID cmd_list RBRACK;

cmd_list: (cmd_expression)*;

cmd_expression:
  CMD FUNCTIONCALL
  | CMD FUNCTIONCALLWITHARGS param_list //function call
  | CMD VARREF COMMA param_list // variable reference
  | CMD builtin_functions param_list // user-defined function call
;

builtin_functions: (CREATE | DELETE | UPDATE | ADD | SUBTRACT | MULTIPLY | DIVIDE | PRINT);

param_list: ARG param (COMMA ARG param)*;
param:
  VARREF
  | VALUE
  | LETTERS VALUE
  | VARPARAM
  | VARPARAM VALUE
;

词法分析器

lexer grammar fsl词法分析器;

INIT : 'init: [' ;
VALIDFUNCTIONID : [a-zA-Z]+ ': [';
VAR : 'var' [0-9]+':' ;
VALUE : [0-9]+ ('.' [0-9]+)? ;
CMD : 'cmd:' ;
VARREF : '#var'[0-9]+ ;
FUNCTIONCALL : '#' [a-zA-Z]+ ;
FUNCTIONCALLWITHARGS : '#' [a-zA-Z]+',' ;
VARPARAM : '$' [a-zA-Z]+ ;

DIGITS: [0-9]+;
LETTERS: [a-zA-Z]+;

ARG: LETTERS DIGITS? COLON;

// Define function names as keywords
CREATE  : 'create,' ;
DELETE  : 'delete,' ;
UPDATE  : 'update,' ;
ADD     : 'add,' ;
SUBTRACT: 'subtract,' ;
MULTIPLY: 'multiply,' ;
DIVIDE  : 'divide,' ;
PRINT   : 'print,' ;

COLON : ':';
COMMA : ',';
RBRACK : ']';

SPACE : [ \t\r\n]+ -> skip ;

我正在try 匹配的示例输入:

var1: 1
var2: 2

init: [
    cmd: #setup
]

setup: [
    cmd: #sum, id: var1, value1: #var1, value2: #var2
    cmd: #printAll
]

sum: [
   cmd: add, id: $id, operand1: $value1, operand2: $value2
]

printAll: [
   cmd: print, value: #var1
   cmd: print, value: #var2
   cmd: print, value: #var3
]