C++ (Cpp) ValuePtr::vFloat示例

bool
sEqP(ValuePtr lhs, ValuePtr rhs)
{
  if(lhs->type() != rhs->type()) return false;
  if(lhs->isBool() && lhs->vBool() == rhs->vBool()) return true;
  else if(lhs->isNumber() && lhs->isExact() && rhs->isExact() && lhs->vInt() == rhs->vInt()) return true;
  else if(lhs->isNumber() && !lhs->isExact() && !rhs->isExact() && lhs->vFloat() == rhs->vFloat()) return true;
  else if(lhs->isString() && string(lhs->vString()) == string(rhs->vString())) return true;
  else if(lhs->isSymbol() && string(lhs->vString()) == string(rhs->vString())) return true;
  else if(lhs->isPair() && (lhs == rhs || (lhs->isNull() && rhs->isNull()))) return true;
  else if(lhs->isProcedure() && (lhs.mValue == rhs.mValue)) return true;
  else if(lhs->type() == Value::UNDEFINED) return false;
  return false;
}

示例#2

显示文件

文件： Library.cpp 项目： MrPhil/ShortHike

float
sAsFloat(ValuePtr number)
{
  CHECK("Error convering non number to float", number->isNumber());
  if(!number->isExact()) {
    return number->vFloat();
  }
  else {
    return static_cast<float>(number->vInt());
  }
}

示例#3

显示文件

文件： Eval.cpp 项目： MrPhil/ShortHike

void
TestEval::eval_simple()
{
  EnvPtr env = new Environment();
  env->parent = NULL;
  ValuePtr value;

  // bool false
  value = eval(env, "#f");
  CHECK("Boolean false", value->isBool() && !value->vBool());

  // integer
  value = eval(env, "#t");
  CHECK("Boolean true", value->isBool() && value->vBool());

  // integer
  value = eval(env, "123");
  CHECK("Integer type", value->isNumber() && value->isExact());
  CHECK_EQUAL("Integer content", int, 123, value->vInt());

  // double
  value = eval(env, "123.456");
  CHECK("Float type", value->isNumber() && !value->isExact());
  CHECK_EQUAL("Float content", float, 123.456, value->vFloat());

  // string
  value = eval(env, "\"foobar\"");
  CHECK("String type", value->isString());
  CHECK_EQUAL("string content", string, "foobar", value->vString());

  // Symbol
  ValuePtr intValue = new NumberValue(10);
  env->values["foo_symbol!"] = intValue;
  value = eval(env, "foo_symbol!");
  CHECK("Symbol lookup", intValue == value);

  // Quote
  value = eval(env, "'(foo)");
  CHECK("Pair type", value->isPair());
  CHECK("Empty list type", value->cdr()->isNull());
  CHECK("Symbol type", value->car()->isSymbol());
  CHECK_EQUAL("Symbol value", string, "foo", value->car()->vString());  
}