stage1 指针计算类型的错误修复 as运算符优先级的修改 ir2vm的bug修复

gramma.pest

@@ -101,12 +101,13 @@ ArrowExpr = { RangeExpr ~ ((THIN_R_ARROW | THIN_L_ARROW | FAT_D_ARROW | THIN_D_A
 RangeExpr  = { ShiftExpr ~ (DOT2 ~ ShiftExpr?)? }
 ShiftExpr  = { AddExpr ~ ((L_ARROW2_EQ | L_ARROW2 | R_ARROW2_EQ | R_ARROW2) ~ AddExpr)* }
 AddExpr    = { MulExpr ~ ((PLUS | MINUS) ~ MulExpr)* }
-MulExpr    = { PrefixExpr ~ ((ASTERISK | SLASH | PERCENT) ~ PrefixExpr)* }
+MulExpr    = { CastExpr ~ ((ASTERISK | SLASH | PERCENT) ~ CastExpr)* }
+CastExpr   = { PrefixExpr ~ (KEYWORD_as ~ TypeExpr)* }
 PrefixExpr = { PrefixOp* ~ PostfixExpr }
 PrefixOp   = { MINUS | BANG | TILDE | AMPERSAND }
 
 PostfixExpr = {
-    PrimaryExpr ~ (LPAREN ~ ExprList ~ RPAREN | DOT ~ IDENTIFIER | DOT ~ ASTERISK | LBRACKET ~ Expr ~ RBRACKET | LBRACKET ~ Expr ~ DOT2 ~ Expr? ~ RBRACKET | KEYWORD_as ~ TypeExpr)*
+    PrimaryExpr ~ (LPAREN ~ ExprList ~ RPAREN | DOT ~ IDENTIFIER | DOT ~ ASTERISK | LBRACKET ~ Expr ~ RBRACKET | LBRACKET ~ Expr ~ DOT2 ~ Expr? ~ RBRACKET)*
 }
 
 ExprList = { (Expr ~ COMMA)* ~ Expr? }