// <bare-function-type> ::= <(signature) type>+
static bool ParseBareFunctionType(State *state) {
State copy = *state;
DisableAppend(state);
if (OneOrMore(ParseType, state)) {
RestoreAppend(state, copy.append);
MaybeAppend(state, "()");
return true;
}
*state = copy;
return false;
}
// <template-args> ::= I <template-arg>+ E
static bool ParseTemplateArgs(State *state) {
State copy = *state;
DisableAppend(state);
if (ParseChar(state, 'I') &&
OneOrMore(ParseTemplateArg, state) &&
ParseChar(state, 'E')) {
RestoreAppend(state, copy.append);
MaybeAppend(state, "<>");
return true;
}
*state = copy;
return false;
}
static int drv(int p,int c) {
int p1,p2,cf,cl,cn,ret,m;
assert(!P_IS(p,P_ERROR));
m=new_memo(p,c);
if(m!=-1) return M_RET(m);
switch(P_TYP(p)) {
case P_NOT_ALLOWED: case P_EMPTY: ret=notAllowed; break;
case P_CHOICE: Choice(p,p1,p2); ret=choice(drv(p1,c),drv(p2,c)); break;
case P_GROUP: Group(p,p1,p2); {int p11=group(drv(p1,c),p2); ret=nullable(p1)?choice(p11,drv(p2,c)):p11;} break;
case P_ONE_OR_MORE: OneOrMore(p,p1); ret=group(drv(p1,c),choice(empty,p)); break;
case P_EXCEPT: Except(p,p1,p2); ret=nullable(drv(p1,c))&&!nullable(drv(p2,c))?empty:notAllowed; break;
case P_RANGE: Range(p,cf,cl); ret=cf<=c&&c<=cl?empty:notAllowed; break;
case P_CLASS: Class(p,cn); ret=in_class(c,cn)?empty:notAllowed; break;
case P_ANY: ret=empty; break;
case P_CHAR: Char(p,cf); ret=c==cf?empty:notAllowed; break;
default: ret=0; assert(0);
}
new_memo(p,c); M_SET(ret);
accept_m();
return ret;
}