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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-05-28 12:21:51 +0300 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-05-28 21:31:19 +0300 |
| commit | ed2a22f277c60308481ecea1e1b846cbf249af41 (patch) | |
| tree | de91d6e6c9f17a34aa5ef643468aca147b35d3e5 /scripts/kconfig/zconf.l | |
| parent | 1175c02506ffc9cef9f3c520249d8740a3174b1f (diff) | |
| download | linux-ed2a22f277c60308481ecea1e1b846cbf249af41.tar.xz | |
kconfig: support append assignment operator
Support += operator. This appends a space and the text on the
righthand side to a variable.
The timing of the evaluation of the righthand side depends on the
flavor of the variable. If the lefthand side was originally defined
as a simple variable, the righthand side is expanded immediately.
Otherwise, the expansion is deferred. Appending something to an
undefined variable results in a recursive variable.
To implement this, we need to remember the flavor of variables.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/kconfig/zconf.l')
| -rw-r--r-- | scripts/kconfig/zconf.l | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l index 376af6cf2f65..a6cbe2d06d01 100644 --- a/scripts/kconfig/zconf.l +++ b/scripts/kconfig/zconf.l @@ -116,6 +116,7 @@ n [A-Za-z0-9_-] } "=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_RECURSIVE; return T_ASSIGN; } ":=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_SIMPLE; return T_ASSIGN; } + "+=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_APPEND; return T_ASSIGN; } [[:blank:]]+ . warn_ignored_character(*yytext); \n { |