From b2aa457603b7c98cd2052c762b63811602151c92 Mon Sep 17 00:00:00 2001
From: unknown <user@mil8a-202a-05.mmcs.sfedu.ru>
Date: Mon, 5 Sep 2022 13:36:49 +0300
Subject: [PATCH] first try
---
Module1/Lexer.cs | 46 ++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 42 insertions(+), 4 deletions(-)
diff --git a/Module1/Lexer.cs b/Module1/Lexer.cs
index 4b11463..ce470f0 100644
--- a/Module1/Lexer.cs
+++ b/Module1/Lexer.cs
@@ -68,13 +68,18 @@ namespace Lexer
public override bool Parse()
{
NextCh();
+ int res = 0; // тут будем собирать число
+ int sign = 1; // знак числа
if (currentCh == '+' || currentCh == '-')
{
+ if (currentCh == '-')
+ sign = -1;
NextCh();
}
if (char.IsDigit(currentCh))
{
+ res = currentCh - '0';
NextCh();
}
else
@@ -84,6 +89,7 @@ namespace Lexer
while (char.IsDigit(currentCh))
{
+ res = res * 10 + currentCh - '0';
NextCh();
}
@@ -93,6 +99,8 @@ namespace Lexer
Error();
}
+ this.parseResult = res * sign;
+
return true;
}
@@ -113,10 +121,40 @@ namespace Lexer
builder = new StringBuilder();
}
- public override bool Parse()
- {
- throw new NotImplementedException();
- }
+ public override bool Parse()
+ {
+ NextCh();
+
+ if (currentCharValue != -1)
+ {
+ Error();
+ }
+
+ var builder1 = new StringBuilder();
+
+ if (char.IsLetter(currentCh) || currentCh == '_')
+ {
+ builder1.Append(currentCh);
+ NextCh();
+ }
+ else
+ Error();
+
+ while (char.IsDigit(currentCh) || char.IsLetter(currentCh) || currentCh == '_')
+ {
+ builder1.Append(currentCh);
+ NextCh();
+ }
+
+ if (currentCharValue != -1)
+ {
+ Error();
+ }
+
+ parseResult = builder1.ToString();
+
+ return true;
+ }
}
--
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