From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Tue, 11 Dec 2018 11:01:09 +0000 (+0900)
Subject: kconfig: update current_pos in the second lexer
X-Git-Tag: Ubuntu-5.13.0-19.19~9464^2~7
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=4b31a32caf0a28e4726f1bf267ff8a804ed864e2;p=mirror_ubuntu-jammy-kernel.git

kconfig: update current_pos in the second lexer

To simplify the generated lexer, let the hand-made lexer update the
file name and line number for the parser.

I tested this with DEBUG_PARSE, and confirmed the same file names
and line numbers were dumped.

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

diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
index 05e2d95e3b22..9b083a176fb4 100644
--- a/scripts/kconfig/zconf.l
+++ b/scripts/kconfig/zconf.l
@@ -101,8 +101,6 @@ n	[A-Za-z0-9_-]
 <COMMAND>{
 	{n}+	{
 		const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
-		current_pos.file = current_file;
-		current_pos.lineno = yylineno;
 		if (id && id->flags & TF_COMMAND) {
 			BEGIN(PARAM);
 			return id->token;
@@ -285,9 +283,21 @@ int yylex(void)
 repeat:
 	token = yylex1();
 
-	/* Do not pass unneeded T_EOL to the parser. */
-	if ((prev_token == T_EOL || prev_token == T_HELPTEXT) && token == T_EOL)
-		goto repeat;
+	if (prev_token == T_EOL || prev_token == T_HELPTEXT) {
+		if (token == T_EOL) {
+			/* Do not pass unneeded T_EOL to the parser. */
+			goto repeat;
+		} else {
+			/*
+			 * For the parser, update file/lineno at the first token
+			 * of each statement. Generally, \n is a statement
+			 * terminator in Kconfig, but it is not always true
+			 * because \n could be escaped by a backslash.
+			 */
+			current_pos.file = current_file;
+			current_pos.lineno = yylineno;
+		}
+	}
 
 	if (prev_prev_token == T_EOL && prev_token == T_WORD &&
 	    (token == T_EQUAL || token == T_COLON_EQUAL || token == T_PLUS_EQUAL))