linux-kernel - [PATCH 25/27] kconfig: switch to ASSIGN

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Message-Id: <1544526070-16690-26-git-send-email-yamada.masahiro@socionext.com>
Date:   Tue, 11 Dec 2018 20:01:08 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Ulf Magnusson <ulfalizer@...il.com>, linux-kernel@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: [PATCH 25/27] kconfig: switch to ASSIGN_VAL state in the second lexer

To simplify the generated lexer, switch to the ASSIGN_VAL state in
the hand-made lexer.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/kconfig/zconf.l | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
index c8823a4..d462507 100644
--- a/scripts/kconfig/zconf.l
+++ b/scripts/kconfig/zconf.l
@@ -25,6 +25,7 @@ static struct {
 	int lineno;
 } current_pos;
 
+static int prev_prev_token = T_EOL;
 static int prev_token = T_EOL;
 static char *text;
 static int text_size, text_asize;
@@ -124,9 +125,9 @@ n	[A-Za-z0-9_-]
 			return T_WORD;
 		free(yylval.string);
 	}
-	"="	{ BEGIN(ASSIGN_VAL); return T_EQUAL; }
-	":="	{ BEGIN(ASSIGN_VAL); return T_COLON_EQUAL; }
-	"+="	{ BEGIN(ASSIGN_VAL); return T_PLUS_EQUAL; }
+	"="	return T_EQUAL;
+	":="	return T_COLON_EQUAL;
+	"+="	return T_PLUS_EQUAL;
 	[[:blank:]]+
 	.	warn_ignored_character(*yytext);
 	\n	{
@@ -294,6 +295,11 @@ repeat:
 	if ((prev_token == T_EOL || prev_token == T_HELPTEXT) && token == T_EOL)
 		goto repeat;
 
+	if (prev_prev_token == T_EOL && prev_token == T_WORD &&
+	    (token == T_EQUAL || token == T_COLON_EQUAL || token == T_PLUS_EQUAL))
+		BEGIN(ASSIGN_VAL);
+
+	prev_prev_token = prev_token;
 	prev_token = token;
 
 	return token;
-- 
2.7.4