/*
* Production: Arithmetic Expression
* FIRST set: { -, +, AVID_T, FPL_T, INL_T, ( }
*/
void arithmetic_expression(void) {
switch (lookahead.code) {
case ART_OP_T:
/* The attribute must be MINUS or PLUS. */
switch (lookahead.attribute.arr_op) {
case MINUS:
case PLUS:
unary_arithmetic_expression();
break;
default:
syn_printe();
return;
}
break;
case AVID_T:
case FPL_T:
case INL_T:
case LPR_T:
additive_arithmetic_expression();
break;
/* If nothing matches, print an error. */
default:
syn_printe();
return;
}
gen_incode("PLATY: Arithmetic expression parsed");
}
/* FIRST(arithmetic expression)={-,+,AVID_T,FPL_T,INL_T,(}
<arithmetic expression> - >
<unary arithmetic expression>
| <additive arithmetic expression>
Author: Kwok Hong Kelvin Chan */
void arithmetic_expression(void){
switch(lookahead_token.code){
case AVID_T:
case FPL_T:
case INL_T:
case LPR_T:
additive_arithmetic_expression();
gen_incode("Arithmetic expression parsed");
break;
case ART_OP_T:
switch(lookahead_token.attribute.arr_op){
case MINUS:
case PLUS:
unary_arithmetic_expression();
gen_incode("Arithmetic expression parsed");
break;
default:
syn_printe();
break;
}
break;
default:
syn_printe();
break;
}
}
