+ operator

[dianaliu]

String s = "hi" + "bye"

Translator translates this to rt::StringLiteral("hi") + rt::StringLiteral("bye") or something like that. the + doesn't work.

[dianaliu]

Grimm mentioned in class today that he loves the operator + DUN DUN DUN

[dianaliu]

We get the below error because the + operator needs to be overloaded? (or specialized?)

--- Finish translation. See xtc/output/
FloatArray.cc: In function ‘int32_t main()’:
FloatArray.cc:85: error: no match for ‘operator+’ in ‘__rt::literal(const char*)() + f. __rt::Ptr<T>::operator-> [with T = __rt::Array<float>]()->__rt::Array<float>::length’
--- ERR: CPP compile time error

Generated CC code:

using namespace java::lang;

int32_t main() {
  __rt::Ptr<__rt::Array<float > > f = new __rt::Array<float >(2);

  for (int32_t i = 0; i < f->length; i++) {
    // __rt::checkNotNull(i);
        // __rt::checkStore(f,i);
(*f)[i] = i;
  }
  // __rt::checkNotNull(f);
  std::cout
     << __rt::literal("array f has ") + f->length << __rt::literal(" element(s)")
     << std::endl;
}

[dianaliu]

There are only 7 cases where it fails. We need this to compile!!!

Test.cc:1349: error: no match for ‘operator+’ in ‘__rt::literal(const char*)() + __rt::literal(const char*)()’
Test.cc:1364: error: no match for ‘operator+’ in ‘__rt::literal(const char*)() + __rt::literal(const char*)()’
Test.cc:1379: error: no match for ‘operator+’ in ‘__rt::literal(const char*)() + 1’
Test.cc:1394: error: no match for ‘operator+’ in ‘__rt::literal(const char*)() + '1'’
Test.cc:1409: error: no match for ‘operator+’ in ‘'H' + __rt::literal(const char*)()’
Test.cc:1428: error: no match for ‘operator+’ in ‘c + __rt::literal(const char*)()’
Test.cc:1443: error: no match for ‘operator+’ in ‘'H' + __rt::literal(const char*)()’

[dianaliu]

// String s3 = s1 + " and " + s2; std::ostringstream temp; temp << s1 << " and " << s2; String s3 = new java::lang::__String(temp.str()