struct operation

1.5 struct operation

An operation has the following structure:

struct operation {
        Operation_Type op_type;
        struct expression *left;
        struct expression *right;
};

op_type

This member specifies the type of the operation. Table 1.5 shows its values.

left,right

These two members represent for the left and right operands in the operation. Both of them are expressions (see section 1.4). For unary operations such as UMINUS,COMPLEMENT,HI, and LO, left is NULL. For binary operations, neither left nor right is NULL.
Table 1.5 Operation Types

Value	Operation	Value	Operation
`BIT_OR`	`left\|right`	`LSHIFT`	`left<<right`
`BIT_XOR`	`left^right`	`RSHIFT`	`left>>right`
`BIT_AND`	`left&right`	`PLUS`	`left+right`
`UMINUS`	`-right`	`MINUS`	`left-right`
`COMPLEMENT`	`~right`	`MUL`	`left*right`
`HI`	`%hi(right)`	`DIV`	`left/right`
`LO`	`%lo(right)`	`MODULO`	`left%right`

table of content