From c40bfd0725b8231d5ae2b6c8d19abeb954ff1b3f Mon Sep 17 00:00:00 2001
From: unknown <user@mil8a-202a-02.mmcs.sfedu.ru>
Date: Mon, 5 Sep 2022 13:21:54 +0300
Subject: [PATCH] IntLexer and part of IdentLexer
---
Module1/Lexer.cs | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/Module1/Lexer.cs b/Module1/Lexer.cs
index 4b11463..2a84012 100644
--- a/Module1/Lexer.cs
+++ b/Module1/Lexer.cs
@@ -68,13 +68,17 @@ namespace Lexer
public override bool Parse()
{
NextCh();
+ int sign = 1;
if (currentCh == '+' || currentCh == '-')
{
+ if (currentCh == '-')
+ sign *= -1;
NextCh();
}
if (char.IsDigit(currentCh))
{
+ parseResult = currentCh - '0';
NextCh();
}
else
@@ -84,10 +88,11 @@ namespace Lexer
while (char.IsDigit(currentCh))
{
+ parseResult = parseResult * 10 + (currentCh - '0');
NextCh();
}
-
+ parseResult *= sign;
if (currentCharValue != -1)
{
Error();
@@ -114,8 +119,12 @@ namespace Lexer
}
public override bool Parse()
- {
- throw new NotImplementedException();
+ {
+ if (builder.Length == 0)
+ Error();
+ if (!(char.IsLetter(builder[0]) || builder[0] == '_'))
+ Error();
+ //throw new NotImplementedException();
}
}
--
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