reg.hpp
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00038 namespace Gecode {
00039
00040 template<class Char, class Traits>
00041 std::basic_ostream<Char,Traits>&
00042 REG::Exp::print(std::basic_ostream<Char,Traits>& os) const {
00043 if (this == NULL)
00044 return os << "[]";
00045 switch (type) {
00046 case ET_SYMBOL:
00047 return os << "[" << data.symbol << "]";
00048 case ET_STAR:
00049 {
00050 bool par = ((data.kids[0] != NULL) &&
00051 ((data.kids[0]->type == ET_CONC) ||
00052 (data.kids[0]->type == ET_OR)));
00053 return data.kids[0]->print(os << (par ? "*(" : "*"))
00054 << (par ? ")" : "");
00055 }
00056 case ET_CONC:
00057 {
00058 bool par0 = ((data.kids[0] != NULL) &&
00059 (data.kids[0]->type == ET_OR));
00060 std::ostream& os1 = data.kids[0]->print(os << (par0 ? "(" : ""))
00061 << (par0 ? ")+" : "+");
00062 bool par1 = ((data.kids[1] != NULL) &&
00063 (data.kids[1]->type == ET_OR));
00064 return data.kids[1]->print(os1 << (par1 ? "(" : "") )
00065 << (par1 ? ")" : "");
00066 }
00067 case ET_OR:
00068 return data.kids[1]->print(data.kids[0]->print(os) << "|");
00069 default: GECODE_NEVER;
00070 }
00071 GECODE_NEVER;
00072 return os;
00073 }
00074
00075
00076 template<class Char, class Traits>
00077 inline std::basic_ostream<Char,Traits>&
00078 REG::print(std::basic_ostream<Char,Traits>& os) const {
00079 std::basic_ostringstream<Char,Traits> s;
00080 s.copyfmt(os); s.width(0);
00081 e->print(s);
00082 return os << s.str();
00083 }
00084
00085 template<class Char, class Traits>
00086 std::basic_ostream<Char,Traits>&
00087 operator <<(std::basic_ostream<Char,Traits>& os, const REG& r) {
00088 return r.print(os);
00089 }
00090
00091 }
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