如何在没有错误的情况下向antlr4添加规则函数? [英] How to add rule of call function to antlr4 without error?
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问题描述
我正在使用antlr4并定义我自己的表达式语法,它运行正常...但是当我添加规则然后规则不匹配...我的语法工作正常:
/ **
*定义一个名为Hello
* /
语法的语法你好;
@parser :: header {
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import ast。*;
}
@parser :: members {
Map< String,Object> symbolTable = new HashMap< String,Object>();
}
r:计划ID BRACKET_OPEN
{
列表< ASTNode> body = new ArrayList< ASTNode>();
}
(句子{body.add($ sentence.node);})*
BRACKET_CLOSE
{
for(ASTNode n:body)
{
n.excute();
}
}
; //匹配关键字hello后跟一个标识符
句子返回[ASTNode节点]:println {$ node = $ println.node;};
println返回[ASTNode节点]:PRINTLN表达式SEMICOLON {$ node = new Println($ expression.node); System.out.println($ PRINTLN.getLine());};
表达式返回[ASTNode节点]:
t1 = factor {$ node = $ t1.node;}
(PLUS t2 = factor {$ node = new Addition($ node,$ t2。 node);}
| MINUS t2 = factor {$ node = new Sub($ node,$ t2.node);}
)*
;
系数返回[ASTNode节点]:t1 = term {$ node = $ t1.node;}
(MULT t2 = term {$ node = new Multiplication($ node,$ t2。节点);}
| DIV t2 = term {$ node = new Div($ node,$ t2.node);}
)*
;
术语返回[ASTNode节点]:
NUMBER {$ node = new Constant(Integer.parseInt($ NUMBER.text));}
| ID {$ node = new VarRef($ ID.text);}
| PAR_OPEN表达式{$ node = $ expression.node;} PAR_CLOSE
;
计划:'计划';
VAR:'var';
PRINTLN:'println';
INT:'int';
DOUBLE:'double';
STRING:'string';
MULT:'*';
加:'+';
DOT:'。';
减:' - ';
DIV:'/';
ASSIGN:'=';
BRACKET_OPEN:'{';
BRACKET_CLOSE:'}';
PAR_OPEN:'(';
PAR_CLOSE:')';
SEMICOLON:';';
ID:[a-zA-Z _] [a-zA-Z0-9 _] *; //匹配小写标识符
IDM:[a-zA-Z _] [a-zA-Z0-9 _] *;
NUMBER:[0-9] +;
WS:[\\\\ n] + - >跳过; //跳过空格,制表符,换行符
当我写输入时
:
程序测试{println class1.get()+ y / m;}
然后输出为:[1: 27]不匹配的输入得到期待IDM
和$ ID.text和$ IDM.text不打印在consol上
那么错了什么?
我尝试过:
我把我的尝试放在我的问题但它不起作用......任何人都可以帮助我吗?
解决方案
sentence.node);})*
BRACKET_CLOSE
{
for(ASTNode n:body)
{
n.excute();
}
}
; //匹配关键字hello后跟一个标识符
句子返回[ASTNode节点]:println {
node =
println.node;};
println返回[ASTNode节点]:PRINTLN表达式SEMICOLON {
I am using antlr4 and define my own expression grammer it work fine ... But when I add a rule then the rule not match ... my grammer is work fine :
/** * Define a grammar called Hello */ grammar Hello; @parser::header{ import java.util.Map; import java.util.HashMap; import java.util.List; import java.util.ArrayList; import ast.*; } @parser::members{ Map<String,Object> symbolTable=new HashMap<String,Object>(); } r : PROGRAM ID BRACKET_OPEN { List<ASTNode> body= new ArrayList<ASTNode>(); } (sentence{body.add($sentence.node);})* BRACKET_CLOSE { for(ASTNode n: body ) { n.excute(); } } ; // match keyword hello followed by an identifier sentence returns [ASTNode node]:println{$node=$println.node;}; println returns [ASTNode node]:PRINTLN expression SEMICOLON {$node=new Println($expression.node);System.out.println($PRINTLN.getLine());}; expression returns [ASTNode node]: t1=factor {$node=$t1.node;} (PLUS t2=factor{$node= new Addition($node,$t2.node);} |MINUS t2=factor{$node= new Sub($node,$t2.node);} )* ; factor returns [ASTNode node]: t1=term {$node=$t1.node;} (MULT t2=term{$node= new Multiplication($node,$t2.node);} | DIV t2=term{$node= new Div($node,$t2.node);} )* ; term returns [ASTNode node]: NUMBER {$node=new Constant(Integer.parseInt($NUMBER.text));} | ID {$node=new VarRef($ID.text);} | PAR_OPEN expression {$node=$expression.node;} PAR_CLOSE ; PROGRAM:'program'; VAR:'var'; PRINTLN:'println'; INT :'int'; DOUBLE :'double'; STRING :'string'; MULT :'*'; PLUS :'+'; DOT : '.'; MINUS:'-'; DIV:'/' ; ASSIGN:'='; BRACKET_OPEN : '{'; BRACKET_CLOSE : '}'; PAR_OPEN :'('; PAR_CLOSE :')'; SEMICOLON:';'; ID : [a-zA-Z_][a-zA-Z0-9_]* ; // match lower-case identifiers IDM : [a-zA-Z_][a-zA-Z0-9_]* ; NUMBER :[0-9]+; WS : [ \t\r\n]+ -> skip ; // skip spaces, tabs, newlines
when I write the input :
program test{println class1.get()+y/m;}
then the output is : [1:27] mismatched input 'get' expecting IDM
and $ID.text and $IDM.text not print on consol
so what wrong ?
What I have tried:
I put my try in my question But it not work ... can any body help me ?
解决方案
sentence.node);})* BRACKET_CLOSE { for(ASTNode n: body ) { n.excute(); } } ; // match keyword hello followed by an identifier sentence returns [ASTNode node]:println{
node=
println.node;}; println returns [ASTNode node]:PRINTLN expression SEMICOLON {
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