/// <summary>
/// Emit the load of a constant field.
/// </summary>
/// <remarks>
/// We can't emit a ldsfld/ldfld of a constant so we have to get its value and then emit a ldc.
/// </remarks>
/// <param name="fi"></param>
/// <param name="ilg"></param>
/// <param name="context"></param>
private static void EmitLiteral(FieldInfo fi, YaleIlGenerator ilg, ExpressionContext context)
{
var value = fi.GetValue(null);
var type = value.GetType();
var typeCode = Type.GetTypeCode(type);
LiteralElement elem;
switch (typeCode)
{
case TypeCode.Char:
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Int32:
elem = new Int32LiteralElement(Convert.ToInt32(value));
break;
case TypeCode.UInt32:
elem = new UInt32LiteralElement((UInt32)value);
break;
case TypeCode.Int64:
elem = new Int64LiteralElement((Int64)value);
break;
case TypeCode.UInt64:
elem = new UInt64LiteralElement((UInt64)value);
break;
case TypeCode.Double:
elem = new DoubleLiteralElement((double)value);
break;
case TypeCode.Single:
elem = new SingleLiteralElement((float)value);
break;
case TypeCode.Boolean:
elem = new BooleanLiteralElement((bool)value);
break;
case TypeCode.String:
elem = new StringLiteralElement((string)value);
break;
default:
elem = null;
Debug.Fail("Unsupported constant type");
break;
}
elem.Emit(ilg, context);
}
/// <summary>
/// Emit the load of a constant field. We can't emit a ldsfld/ldfld of a constant so we have to get its value
/// and then emit a ldc.
/// </summary>
/// <param name="fi"></param>
/// <param name="ilg"></param>
/// <param name="services"></param>
private static void EmitLiteral(System.Reflection.FieldInfo fi, FleeILGenerator ilg, IServiceProvider services)
{
object value = fi.GetValue(null);
Type t = value.GetType();
TypeCode code = Type.GetTypeCode(t);
LiteralElement elem = default(LiteralElement);
switch (code)
{
case TypeCode.Char:
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.Int16:
case TypeCode.UInt16:
case TypeCode.Int32:
elem = new Int32LiteralElement(System.Convert.ToInt32(value));
break;
case TypeCode.UInt32:
elem = new UInt32LiteralElement((UInt32)value);
break;
case TypeCode.Int64:
elem = new Int64LiteralElement((Int64)value);
break;
case TypeCode.UInt64:
elem = new UInt64LiteralElement((UInt64)value);
break;
case TypeCode.Double:
elem = new DoubleLiteralElement((double)value);
break;
case TypeCode.Single:
elem = new SingleLiteralElement((float)value);
break;
case TypeCode.Boolean:
elem = new BooleanLiteralElement((bool)value);
break;
case TypeCode.String:
elem = new StringLiteralElement((string)value);
break;
default:
elem = null;
Debug.Fail("Unsupported constant type");
break;
}
elem.Emit(ilg, services);
}
/// <summary>
/// Attempt to find the first type of integer that a number can fit into
/// </summary>
/// <param name="image"></param>
/// <param name="isHex"></param>
/// <param name="negated"></param>
/// <param name="services"></param>
/// <returns></returns>
public static LiteralElement Create(string image, bool isHex, bool negated, IServiceProvider services)
{
StringComparison comparison = StringComparison.OrdinalIgnoreCase;
if (isHex == false)
{
// Create a real element if required
LiteralElement realElement = RealLiteralElement.CreateFromInteger(image, services);
if ((realElement != null))
{
return(realElement);
}
}
bool hasUSuffix = image.EndsWith("u", comparison) & !image.EndsWith("lu", comparison);
bool hasLSuffix = image.EndsWith("l", comparison) & !image.EndsWith("ul", comparison);
bool hasUlSuffix = image.EndsWith("ul", comparison) | image.EndsWith("lu", comparison);
bool hasSuffix = hasUSuffix | hasLSuffix | hasUlSuffix;
LiteralElement constant = default(LiteralElement);
System.Globalization.NumberStyles numStyles = NumberStyles.Integer;
if (isHex == true)
{
numStyles = NumberStyles.AllowHexSpecifier;
image = image.Remove(0, 2);
}
if (hasSuffix == false)
{
// If the literal has no suffix, it has the first of these types in which its value can be represented: int, uint, long, ulong.
constant = Int32LiteralElement.TryCreate(image, isHex, negated);
if ((constant != null))
{
return(constant);
}
constant = UInt32LiteralElement.TryCreate(image, numStyles);
if ((constant != null))
{
return(constant);
}
constant = Int64LiteralElement.TryCreate(image, isHex, negated);
if ((constant != null))
{
return(constant);
}
return(new UInt64LiteralElement(image, numStyles));
}
else if (hasUSuffix == true)
{
image = image.Remove(image.Length - 1);
// If the literal is suffixed by U or u, it has the first of these types in which its value can be represented: uint, ulong.
constant = UInt32LiteralElement.TryCreate(image, numStyles);
if ((constant != null))
{
return(constant);
}
else
{
return(new UInt64LiteralElement(image, numStyles));
}
}
else if (hasLSuffix == true)
{
// If the literal is suffixed by L or l, it has the first of these types in which its value can be represented: long, ulong.
image = image.Remove(image.Length - 1);
constant = Int64LiteralElement.TryCreate(image, isHex, negated);
if ((constant != null))
{
return(constant);
}
else
{
return(new UInt64LiteralElement(image, numStyles));
}
}
else
{
// If the literal is suffixed by UL, Ul, uL, ul, LU, Lu, lU, or lu, it is of type ulong.
Debug.Assert(hasUlSuffix == true, "expecting ul suffix");
image = image.Remove(image.Length - 2);
return(new UInt64LiteralElement(image, numStyles));
}
}
/// <summary>
/// Attempt to find the first type of integer that a number can fit into
/// </summary>
/// <param name="image"></param>
/// <param name="isHex"></param>
/// <param name="negated"></param>
/// <param name="options"></param>
/// <returns></returns>
public static LiteralElement Create(string image, bool isHex, bool negated, ExpressionBuilderOptions options)
{
const StringComparison comparison = StringComparison.OrdinalIgnoreCase;
if (isHex == false)
{
// Create a real element if required
var realElement = RealLiteralElement.CreateFromInteger(image, options);
if (realElement != null)
{
return(realElement);
}
}
var hasUSuffix = image.EndsWith("u", comparison) & !image.EndsWith("lu", comparison);
var hasLSuffix = image.EndsWith("l", comparison) & !image.EndsWith("ul", comparison);
var hasUlSuffix = image.EndsWith("ul", comparison) | image.EndsWith("lu", comparison);
var hasSuffix = hasUSuffix | hasLSuffix | hasUlSuffix;
LiteralElement constant;
var numStyles = NumberStyles.Integer;
if (isHex)
{
numStyles = NumberStyles.AllowHexSpecifier;
image = image.Remove(0, 2);
}
if (hasSuffix == false)
{
// If the literal has no suffix, it has the first of these types in which its value can be represented: int, uint, long, ulong.
constant = Int32LiteralElement.TryCreate(image, isHex, negated);
if (constant != null)
{
return(constant);
}
constant = UInt32LiteralElement.TryCreate(image, numStyles);
if (constant != null)
{
return(constant);
}
constant = Int64LiteralElement.TryCreate(image, isHex, negated);
if (constant != null)
{
return(constant);
}
return(new UInt64LiteralElement(image, numStyles));
}
if (hasUSuffix)
{
image = image.Remove(image.Length - 1);
// If the literal is suffixed by U or u, it has the first of these types in which its value can be represented: uint, ulong.
constant = UInt32LiteralElement.TryCreate(image, numStyles);
return(constant ?? new UInt64LiteralElement(image, numStyles));
}
if (hasLSuffix)
{
// If the literal is suffixed by L or l, it has the first of these types in which its value can be represented: long, ulong.
image = image.Remove(image.Length - 1);
constant = Int64LiteralElement.TryCreate(image, isHex, negated);
return(constant ?? new UInt64LiteralElement(image, numStyles));
}
// If the literal is suffixed by UL, Ul, uL, ul, LU, Lu, lU, or lu, it is of type ulong.
Debug.Assert(true, "expecting ul suffix");
image = image.Remove(image.Length - 2);
return(new UInt64LiteralElement(image, numStyles));
}