/* FIRST(statement)={AVID,SVID,IF,USING,INPUT,OUTPUT}
<statement> ->
<assignment statement>
| <selection statement>
| <iteration statement>
| <input statement>
| <output statement>
Author: Kwok Hong Kelvin Chan */
void statement(void){
switch(lookahead_token.code){
case AVID_T:
case SVID_T:
assignment_statement();
break;
case KW_T:
switch(lookahead_token.attribute.get_int) {
case IF:
selection_statement();
break;
case USING:
iteration_statement();
break;
case INPUT:
input_statement();
break;
case OUTPUT:
output_statement();
break;
default:
syn_printe();
break;
}
break;
default:
syn_printe();
break;
}
}
int statement(void) {
if( labeled_statement() ) {
} else if( compound_statement() ) {
} else if( expression_statement() ) {
} else if( selection_statement() ) {
} else if( iteration_statement() ) {
} else if( jump_statement() ) {
} else {
abort();
}
}
/*
* Production: Statement
* FIRST set: { AVID_T, SVID_T, KW_T (only IF, USING, INPUT, OUTPUT) }
*/
void statement(void) {
switch (lookahead.code) {
case AVID_T:
case SVID_T:
assignment_statement();
return;
case KW_T:
/* The token attribute must be IF, INPut, OUTPUT or USING */
switch (lookahead.attribute.kwt_idx) {
case IF:
selection_statement();
return;
case INPUT:
input_statement();
return;
case OUTPUT:
output_statement();
return;
case USING:
iteration_statement();
return;
/* If the keyword token does not match the above, print an error and return. */
default:
syn_printe();
return;
}
/* If nothing matches, print an error. */
default:
syn_printe();
return;
}
}
