/* FIRST(unary arithmetic expression)={-,+}
<unary arithmetic expression> ->
- <primary arithmetic expression>
| + <primary arithmetic expression>
Author: Kyle Hinskens */
void unary_arithmetic_expression(void){
switch(lookahead_token.attribute.arr_op){
case MINUS:
match(ART_OP_T,MINUS);
primary_arithmetic_expression();
gen_incode("Unary arithmetic expression parsed");
break;
case PLUS:
match(ART_OP_T,PLUS);
primary_arithmetic_expression();
gen_incode("Unary arithmetic expression parsed");
break;
default:
syn_printe();
break;
}
}
/* FIRST(multiplicative arithmetic expression’)={*,/,e}
<multiplicative arithmetic expression’> ->
* <primary arithmetic expression> <multiplicative arithmetic expression’>
| / <primary arithmetic expression> <multiplicative arithmetic expression’>
| e
Author: Kyle Hinskens */
void multiplicative_arithmetic_expression_p(void){
switch(lookahead_token.code){
case ART_OP_T:
switch(lookahead_token.attribute.arr_op){
case MULT:
match(ART_OP_T,MULT);
primary_arithmetic_expression();
multiplicative_arithmetic_expression_p();
gen_incode("Multiplicative arithmetic expression parsed");
break;
case DIV:
match(ART_OP_T,DIV);
primary_arithmetic_expression();
multiplicative_arithmetic_expression_p();
gen_incode("Multiplicative arithmetic expression parsed");
break;
}
}
}
/* FIRST(multiplicative arithmetic expression)={AVID_T, FPL_T,INL_T ,(}
<multiplicative arithmetic expression> ->
<primary arithmetic expression> <multiplicative arithmetic expression’>
Author: Kwok Hong Kelvin Chan */
void multiplicative_arithmetic_expression(void){
switch(lookahead_token.code){
case AVID_T:
case FPL_T:
case INL_T:
case LPR_T:
primary_arithmetic_expression();
multiplicative_arithmetic_expression_p();
break;
}
}
/*
* Production: Multiplicative Arithmetic Expression (P)
* FIRST set: { *, /, e }
*/
void multiplicative_arithmetic_expression_p(void) {
switch (lookahead.code) {
case ART_OP_T:
/* The token attribute mut be DIV or MULT. */
switch (lookahead.attribute.arr_op) {
case DIV:
case MULT:
match(ART_OP_T, lookahead.attribute.arr_op);
primary_arithmetic_expression();
multiplicative_arithmetic_expression_p();
gen_incode("PLATY: Multiplicative arithmetic expression parsed");
return;
default:
return;
}
return;
default:
return;
}
}
/*
* Production: Unary Arithmetic Expression
* FIRST set: { -, + }
*/
void unary_arithmetic_expression(void) {
switch (lookahead.code) {
case ART_OP_T: /* Arithmetic operator token */
/* The current token attribute must be MINUS or PLUS. */
switch (lookahead.attribute.arr_op) {
case MINUS:
case PLUS:
match(lookahead.code, lookahead.attribute.arr_op);
primary_arithmetic_expression();
gen_incode("PLATY: Unary arithmetic expression parsed");
return;
/* If the token attribute is not MINUS or PLUS, print an error. */
default:
syn_printe();
return;
}
/* If the token code is not ART_OP_T, print an error. */
default:
syn_printe();
return;
}
}
/*
* Production: Multiplicative Arithmetic Expression
* FIRST set: { AVID_T, FPL_T, INL_T, ( }
*/
void multiplicative_arithmetic_expression(void) {
primary_arithmetic_expression();
multiplicative_arithmetic_expression_p();
}
