[Mesa-dev] [PATCH] glsl: Update the #line behaviour on GLSL 3.30+ and GLSL ES+

[Antia Puentes]

>From GLSL 3.30 and GLSL ES 1.00 on, after processing the line
directive (including its new-line), the implementation should
behave as if it is compiling at the line number passed as
argument. In previous versions, it behaved as if compiling
at the passed line number + 1.

Partially fixes https://bugs.freedesktop.org/show_bug.cgi?id=88815
---
 src/glsl/glsl_lexer.ll | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/glsl/glsl_lexer.ll b/src/glsl/glsl_lexer.ll
index f0e047e..2785ed1 100644
--- a/src/glsl/glsl_lexer.ll
+++ b/src/glsl/glsl_lexer.ll
@@ -187,6 +187,15 @@ HASH		^{SPC}#{SPC}
 				    * one-based.
 				    */
 				   yylineno = strtol(ptr, &ptr, 0) - 1;
+
+                                   /* From GLSL 3.30 and GLSL ES on, after processing the
+                                    * line directive (including its new-line), the implementation
+                                    * will behave as if it is compiling at the line number passed
+                                    * as argument. It was line number + 1 in older specifications.
+                                    */
+                                   if (yyextra->is_version(330, 100))
+                                      yylineno--;
+
 				   yylloc->source = strtol(ptr, NULL, 0);
 				}
 {HASH}line{SPCP}{INT}{SPC}$	{
@@ -202,6 +211,14 @@ HASH		^{SPC}#{SPC}
 				    * one-based.
 				    */
 				   yylineno = strtol(ptr, &ptr, 0) - 1;
+
+                                   /* From GLSL 3.30 and GLSL ES on, after processing the
+                                    * line directive (including its new-line), the implementation
+                                    * will behave as if it is compiling at the line number passed
+                                    * as argument. It was line number + 1 in older specifications.
+                                    */
+                                   if (yyextra->is_version(330, 100))
+                                      yylineno--;
 				}
 ^{SPC}#{SPC}pragma{SPCP}debug{SPC}\({SPC}on{SPC}\) {
 				  BEGIN PP;
-- 
2.1.0