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changeset 2:595b3e2dc94e

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impl symbol lexer
author anatofuz <anatofuz@cr.ie.u-ryukyu.ac.jp>
date Fri, 15 May 2020 10:26:01 +0900
parents a1166907ac2d
children 6bd28d00a4f4
files lexer/lexer.go lexer/lexer_test.go
diffstat 2 files changed, 17 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/lexer/lexer.go	Fri May 15 10:20:57 2020 +0900
+++ b/lexer/lexer.go	Fri May 15 10:26:01 2020 +0900
@@ -37,16 +37,28 @@
 	switch l.ch {
 	case '=':
 		tok = newToken(token.ASSIGN, l.ch)
+	case '+':
+		tok = newToken(token.PLUS, l.ch)
+	case '-':
+		tok = newToken(token.MINUS, l.ch)
+	case '!':
+		tok = newToken(token.BANG, l.ch)
+	case '/':
+		tok = newToken(token.SLASH, l.ch)
+	case '*':
+		tok = newToken(token.ASTERISK, l.ch)
+	case '<':
+		tok = newToken(token.LT, l.ch)
+	case '>':
+		tok = newToken(token.GT, l.ch)
 	case ';':
 		tok = newToken(token.SEMICOLON, l.ch)
+	case ',':
+		tok = newToken(token.COMMA, l.ch)
 	case '(':
 		tok = newToken(token.LPAREN, l.ch)
 	case ')':
 		tok = newToken(token.RPAREN, l.ch)
-	case ',':
-		tok = newToken(token.COMMA, l.ch)
-	case '+':
-		tok = newToken(token.PLUS, l.ch)
 	case '{':
 		tok = newToken(token.LBRACE, l.ch)
 	case '}':
--- a/lexer/lexer_test.go	Fri May 15 10:20:57 2020 +0900
+++ b/lexer/lexer_test.go	Fri May 15 10:26:01 2020 +0900
@@ -68,6 +68,7 @@
 		{token.LT, "<"},
 		{token.INT, "10"},
 		{token.GT, ">"},
+		{token.INT, "5"},
 		{token.SEMICOLON, ";"},
 		{token.EOF, ""},
 	}