[PATCH vkd3d 4/5] vkd3d-shader: Implement the ternary operator in #if directives.

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 libs/vkd3d-shader/preproc.l |  2 +-
 libs/vkd3d-shader/preproc.y | 20 ++++++++++++++++++--
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/libs/vkd3d-shader/preproc.l b/libs/vkd3d-shader/preproc.l
index 37acc5e0..1bf14ff4 100644
--- a/libs/vkd3d-shader/preproc.l
+++ b/libs/vkd3d-shader/preproc.l
@@ -162,7 +162,7 @@ IDENTIFIER      [A-Za-z_][A-Za-z0-9_]*
     }

<INITIAL>{WS}+                      {}
-<INITIAL>[-()[]{},+!*/<>&|^]      {return yytext[0];}
+<INITIAL>[-()[]{},+!*/<>&|^?:]    {return yytext[0];}
 <INITIAL>.                          {return T_TEXT;}

%%
diff --git a/libs/vkd3d-shader/preproc.y b/libs/vkd3d-shader/preproc.y
index 051f94bc..aa381e8a 100644
--- a/libs/vkd3d-shader/preproc.y
+++ b/libs/vkd3d-shader/preproc.y
@@ -351,6 +351,7 @@ static void free_parse_arg_names(struct parse_arg_names *args)
 %type <integer> bitor_expr
 %type <integer> logicand_expr
 %type <integer> logicor_expr
+%type <integer> expr
 %type <string> body_token
 %type <const_string> body_token_const
 %type <string_buffer> body_text
@@ -483,6 +484,14 @@ body_token_const
         {
             $$ = "^";
         }
+    | '?'
+        {
+            $$ = "?";
+        }
+    | ':'
+        {
+            $$ = ":";
+        }
     | T_CONCAT
         {
             $$ = "##";
@@ -548,7 +557,7 @@ directive
             }
             vkd3d_free($2);
         }
-    | T_IF logicor_expr T_NEWLINE
+    | T_IF expr T_NEWLINE
         {
             if (!preproc_push_if(ctx, !!$2))
                 YYABORT;
@@ -563,7 +572,7 @@ directive
             preproc_push_if(ctx, !preproc_find_macro(ctx, $2));
             vkd3d_free($2);
         }
-    | T_ELIF logicor_expr T_NEWLINE
+    | T_ELIF expr T_NEWLINE
         {
             const struct preproc_file *file = preproc_get_top_file(ctx);

@@ -791,3 +800,10 @@ logicor_expr
         {
             $$ = $1 || $3;
         }
+
+expr
+    : logicor_expr
+    | expr '?' logicor_expr ':' logicor_expr
+        {
+            $$ = $1 ? $3 : $5;
+        }