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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Assertions.h>
#include <AK/Forward.h>
#include <AK/LogStream.h>
#include <LibJS/Forward.h>
namespace JS {
class Value {
public:
enum class Type {
Empty,
Undefined,
Null,
Number,
String,
Object,
Boolean,
};
bool is_empty() const { return m_type == Type::Empty; }
bool is_undefined() const { return m_type == Type::Undefined; }
bool is_null() const { return m_type == Type::Null; }
bool is_number() const { return m_type == Type::Number; }
bool is_string() const { return m_type == Type::String; }
bool is_object() const { return m_type == Type::Object; }
bool is_boolean() const { return m_type == Type::Boolean; }
bool is_cell() const { return is_string() || is_object(); }
bool is_array() const;
bool is_nan() const { return is_number() && __builtin_isnan(as_double()); }
bool is_infinity() const { return is_number() && __builtin_isinf(as_double()); }
bool is_finite_number() const
{
if (!is_number())
return false;
auto number = as_double();
return !__builtin_isnan(number) && !__builtin_isinf(number);
}
Value()
: m_type(Type::Empty)
{
}
explicit Value(bool value)
: m_type(Type::Boolean)
{
m_value.as_bool = value;
}
explicit Value(double value)
: m_type(Type::Number)
{
m_value.as_double = value;
}
explicit Value(i32 value)
: m_type(Type::Number)
{
m_value.as_double = value;
}
Value(Object* object)
: m_type(object ? Type::Object : Type::Null)
{
m_value.as_object = object;
}
Value(PrimitiveString* string)
: m_type(Type::String)
{
m_value.as_string = string;
}
explicit Value(Type type)
: m_type(type)
{
}
Type type() const { return m_type; }
double as_double() const
{
ASSERT(type() == Type::Number);
return m_value.as_double;
}
bool as_bool() const
{
ASSERT(type() == Type::Boolean);
return m_value.as_bool;
}
Object& as_object()
{
ASSERT(type() == Type::Object);
return *m_value.as_object;
}
const Object& as_object() const
{
ASSERT(type() == Type::Object);
return *m_value.as_object;
}
PrimitiveString* as_string()
{
ASSERT(is_string());
return m_value.as_string;
}
const PrimitiveString* as_string() const
{
ASSERT(is_string());
return m_value.as_string;
}
Cell* as_cell()
{
ASSERT(is_cell());
return m_value.as_cell;
}
String to_string() const;
bool to_boolean() const;
Value to_number() const;
i32 to_i32() const;
double to_double() const;
Value to_primitive(Interpreter&) const;
Object* to_object(Heap&) const;
private:
Type m_type { Type::Empty };
union {
bool as_bool;
double as_double;
PrimitiveString* as_string;
Object* as_object;
Cell* as_cell;
} m_value;
};
inline Value js_undefined()
{
return Value(Value::Type::Undefined);
}
inline Value js_null()
{
return Value(Value::Type::Null);
}
inline Value js_nan()
{
return Value(__builtin_nan(""));
}
inline Value js_infinity()
{
return Value(__builtin_huge_val());
}
inline Value js_negative_infinity()
{
return Value(-__builtin_huge_val());
}
Value greater_than(Interpreter&, Value lhs, Value rhs);
Value greater_than_equals(Interpreter&, Value lhs, Value rhs);
Value less_than(Interpreter&, Value lhs, Value rhs);
Value less_than_equals(Interpreter&, Value lhs, Value rhs);
Value bitwise_and(Interpreter&, Value lhs, Value rhs);
Value bitwise_or(Interpreter&, Value lhs, Value rhs);
Value bitwise_xor(Interpreter&, Value lhs, Value rhs);
Value bitwise_not(Interpreter&, Value);
Value unary_plus(Interpreter&, Value);
Value unary_minus(Interpreter&, Value);
Value left_shift(Interpreter&, Value lhs, Value rhs);
Value right_shift(Interpreter&, Value lhs, Value rhs);
Value add(Interpreter&, Value lhs, Value rhs);
Value sub(Interpreter&, Value lhs, Value rhs);
Value mul(Interpreter&, Value lhs, Value rhs);
Value div(Interpreter&, Value lhs, Value rhs);
Value mod(Interpreter&, Value lhs, Value rhs);
Value exp(Interpreter&, Value lhs, Value rhs);
Value eq(Interpreter&, Value lhs, Value rhs);
Value typed_eq(Interpreter&, Value lhs, Value rhs);
Value instance_of(Interpreter&, Value lhs, Value rhs);
const LogStream& operator<<(const LogStream&, const Value&);
}
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