int function_definition(void) {
if( declaration_specifiers() ) {
declarator();
if( declaration_list() ) {
}
} else if ( declarator() ) {
if( declaration_list() ) {
}
} else {
abort();
}
compound_statement();
}
//program::={<declaration_list><statement_list>}
int program()
{
int es = 0, i;
fscanf(fp, "%s %s\n", token, token1);
printf("%s %s\n", token, token1);
if (strcmp(token, "{"))//判断是否'{'
{
es = 1;
return(es);
}
fscanf(fp, "%s %s\n", &token, &token1);
printf("%s %s\n", token, token1);
es = declaration_list();
if (es > 0) return(es);
printf(" 符号表\n");
printf(" 名字 地址\n");
for (i = 0; i<vartablep; i++)
printf(" %s %d\n", vartable[i].name, vartable[i].address);
es = statement_list();
if (es>0) return(es);
if (strcmp(token, "}"))//判断是否'}'
{
es = 2;
return(es);
}
fprintf(fout, " STOP\n");//产生停止指令
return(es);
}
int declaration_list(void) {
if( declaration() ) {
} else if( declaration_list() ) {
declaration();
} else {
abort();
}
}
TOKEN declaration_list(SYMBOL s)
{
TOKEN dec_list = declaration(s);
if( dec_list != NULL)
{
//FIXME this might be a bug, but I'm not sure yet
set_token_link(dec_list, declaration_list(s));
}
return dec_list;
}
/* construct the parse tree. */
TreeNode * parse (void)
{ TreeNode * t;
token = getToken();
t = declaration_list();
while (token == COMMENT) unexpectedTokenHandling();
if (token != ENDFILE)
syntaxError ("Code ends before file\n");
return t;
}
int compound_statement(void) {
match(LCURLY);
if( statement_list() ) {
} else if( declaration_list() ) {
if( statement_list() ) {
}
} else {
abort();
}
match(RCURLY);
}