我正在尝试创建一个简单的 Irony 解析器。语法应该是
能够识别其中一项或多项
设置链接(“字符串”);
它似乎成功识别了 1 个关键字()调用,但连续两个调用失败了。我得到一个错误状态。当我在 main 中检查 parseTree 变量时,我可以看到它在停止解析之前识别的最后一个标记是字母“c”,即“connect”标记中的第一个字母。谁能告诉我我在这里缺少什么?
code.txt的内容
setlink("stuffs");
connect("things");
LilGrammar.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security;
using System.Text;
using System.Threading.Tasks;
using Irony.Parsing;
namespace IronyTest
{
public class LilGrammar : Grammar
{
public LilGrammar()
{
//Define terminals
var program = new NonTerminal("program");
var command = new NonTerminal("command");
var commandList = new NonTerminal("commandList");
var keyword = new NonTerminal("keyword");
var stringLiteral = new StringLiteral("string", "\"", StringOptions.None);
var LPAREN = ToTerm("(");
var RPAREN = ToTerm(")");
var SEMICO = ToTerm(";");
var NL = ToTerm("\n");
this.Root = program;
program.Rule = command + Eof;
keyword.Rule = ToTerm("setlink") | "connect";
command.Rule = keyword + LPAREN + stringLiteral + RPAREN + SEMICO;
commandList.Rule = MakePlusRule(commandList,null , command);
this.Root = program;
MarkPunctuation(";");
}
}
}
主文件
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Irony.Parsing;
using Irony;
using System.IO;
namespace IronyTest
{
private static void Main(string[] args)
{
Grammar grammar = new LilGrammar();
var parser = new Parser(grammar);
string path = @"c:\code\code.txt";
// Open the file to read from.
string readText = File.ReadAllText(path);
//Returns the root to a parase tree
//var tree = parser.Parse(readText, path);
ParseTree parseTree = parser.Parse(readText,path);
ParseTreeNode root = parseTree.Root;
}