Try try and or_else built-in procedures with operators try and try else

src/tokenizer.cpp

@@ -117,6 +117,7 @@ TOKEN_KIND(Token__KeywordBegin, ""), \
 	TOKEN_KIND(Token_no_inline,   "no_inline"),   \
 	TOKEN_KIND(Token_context,     "context"),     \
 	TOKEN_KIND(Token_asm,         "asm"),         \
+	TOKEN_KIND(Token_try,         "try"),         \
 TOKEN_KIND(Token__KeywordEnd, ""), \
 	TOKEN_KIND(Token_Count, "")