reserve virtual keyword in C++

Author: totalspectrum

Changelog.txt

@@ -1,3 +1,6 @@
+Version 6.2.0
+- Made `virtual` a reserved keyword in C++
+
 Version 6.1.6
 - Added ability to double quote to include quotes in literal BASIC strings
 - Allowed BASIC string constants to initialize other consts

frontends/c/cgram.y

@@ -1025,6 +1025,7 @@ ConstructDefaultValue(AST *decl, AST *val)
 %token C_THROW "throw"
 %token C_THROWIF "__throwifcaught"
 %token C_TRY "try"
+%token C_VIRTUAL "virtual"
 
 // asm only tokens
 %token C_ALIGNL "alignl"

frontends/lexer.c

@@ -2449,6 +2449,7 @@ struct reservedword c_keywords[] = {
     { "__throw", C_THROW },
     { "__throwifcaught", C_THROWIF },
     { "__try", C_TRY },
+    { "__virtual", C_VIRTUAL },
     { "typedef", C_TYPEDEF },
     { "__typeof__", C_TYPEOF },
     { "union", C_UNION },
@@ -2473,6 +2474,7 @@ struct reservedword cpp_keywords[] = {
     { "true", C_TRUE },
     { "try", C_TRY },
     { "typeof", C_TYPEOF },
+    { "virtual", C_VIRTUAL },
 };
 
 // keywords reserved in BASIC only in asm blocks