From: Wolfgang Bumiller <blub@speed.at>
Date: Thu, 10 Jan 2013 14:12:19 +0000 (+0100)
Subject: for compile-time constants << and >> are now available
X-Git-Tag: before-library~331
X-Git-Url: https://git.xonotic.org/?p=xonotic%2Fgmqcc.git;a=commitdiff_plain;h=428453a132f4099d1ff8f61598166bff9d1d3bb4

for compile-time constants << and >> are now available
---

diff --git a/lexer.h b/lexer.h
index 5d7b7f6..71ff198 100644
--- a/lexer.h
+++ b/lexer.h
@@ -250,6 +250,9 @@ static const oper_info fte_operators[] = {
     { "+",   2, opid1('+'),         ASSOC_LEFT,  12, 0 },
     { "-",   2, opid1('-'),         ASSOC_LEFT,  12, 0 },
 
+    { "<<",  2, opid2('<','<'),     ASSOC_LEFT,  11, 0 },
+    { ">>",  2, opid2('>','>'),     ASSOC_LEFT,  11, 0 },
+
     { "<",   2, opid1('<'),         ASSOC_LEFT,  10, 0 },
     { ">",   2, opid1('>'),         ASSOC_LEFT,  10, 0 },
     { "<=",  2, opid2('<','='),     ASSOC_LEFT,  10, 0 },
diff --git a/parser.c b/parser.c
index 3496437..b15280b 100644
--- a/parser.c
+++ b/parser.c
@@ -929,14 +929,21 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
                     exprs[0], exprs[1]);
             break;
         case opid1('^'):
-            parseerror(parser, "TODO: bitxor");
+            compile_error(ast_ctx(exprs[0]), "Not Yet Implemented: bit-xor via ^");
             return false;
 
         case opid2('<','<'):
         case opid2('>','>'):
+            if (CanConstFold(exprs[0], exprs[1]) && ! NotSameType(TYPE_FLOAT)) {
+                if (op->id == opid2('<','<'))
+                    out = (ast_expression*)parser_const_float(parser, (double)((int)(ConstF(0)) << (int)(ConstF(1))));
+                else
+                    out = (ast_expression*)parser_const_float(parser, (double)((int)(ConstF(0)) >> (int)(ConstF(1))));
+                break;
+            }
         case opid3('<','<','='):
         case opid3('>','>','='):
-            parseerror(parser, "TODO: shifts");
+            compile_error(ast_ctx(exprs[0]), "Not Yet Implemented: bit-shifts");
             return false;
 
         case opid2('|','|'):