[Mesa-dev] [PATCH] glsl: respect the source number set by #line <line> <source>

[Antia Puentes]

>From GLSL 1.30.10, section 3.3 (Preprocessor):
"#line line source-string-number ... After processing this directive
(including its new-line), the implementation will behave as if it is
compiling at ... source string number source-string-number. Subsequent
source strings will be numbered sequentially, until another #line
directive overrides that numbering."

In the previous implementation the source number was always zero.
Subsequent source strings are still not numbered sequentially, because
in the glShaderSource implementation we are concatenating the source code
strings into one long string.

Partially fixes https://bugs.freedesktop.org/show_bug.cgi?id=88815
---
 src/glsl/glsl_lexer.ll | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/glsl/glsl_lexer.ll b/src/glsl/glsl_lexer.ll
index 8dc3d10..f0e047e 100644
--- a/src/glsl/glsl_lexer.ll
+++ b/src/glsl/glsl_lexer.ll
@@ -36,14 +36,13 @@ static int classify_identifier(struct _mesa_glsl_parse_state *, const char *);
 
 #define YY_USER_ACTION						\
    do {								\
-      yylloc->source = 0;					\
       yylloc->first_column = yycolumn + 1;			\
       yylloc->first_line = yylloc->last_line = yylineno + 1;	\
       yycolumn += yyleng;					\
       yylloc->last_column = yycolumn + 1;			\
    } while(0);
 
-#define YY_USER_INIT yylineno = 0; yycolumn = 0;
+#define YY_USER_INIT yylineno = 0; yycolumn = 0; yylloc->source = 0;
 
 /* A macro for handling reserved words and keywords across language versions.
  *
-- 
2.1.0