private static void DefaultNotSupportedException(CSCodeFormatter c)
{
c.Writeln("default:");
c.IncIndent();
c.Writeln("throw new NotSupportedException();");
c.DecIndent();
}
private void GenerateValueHelper()
{
var file = CreateFile();
var subDir = "Helpers";
var cl = file.GetOrCreateClass(Namespace + "." + subDir, "ValueHelper");
cl.IsStatic = true;
List <string> GetTypes(bool withString)
{
var types = "int,long,short,sbyte,uint,ulong,ushort,byte,double,float,decimal".Split(',').ToList();
if (withString)
{
types.Add("string");
}
return(types);
}
void MakeBinaryOperator(string name, string op)
{
var types = GetTypes(op == "+");
var c = new CSCodeFormatter();
c.Open("switch (left)");
{
foreach (var left in types)
{
var ln = "left" + FirstUpper(left);
c.Writeln($"case {left} {ln}:");
c.IncIndent();
{
c.Open("switch (right)");
{
foreach (var right in types)
{
if (!IsAllowedPair(left, right))
{
continue;
}
var rn = "right" + FirstUpper(right);
c.Writeln($"case {right} {rn}: return {ln} {op} {rn};");
}
DefaultNotSupportedException(c);
}
c.Close();
}
c.DecIndent();
}
DefaultNotSupportedException(c);
}
c.Close();
var m = cl.AddMethod(name, "object")
.WithBody(c)
.WithStatic();
m.AddParam("left", "object");
m.AddParam("right", "object");
}
void MakeIsNumericZero(string name, Func <string, string, string> f)
{
var types = GetTypes(false);
var c = new CSCodeFormatter();
c.Open("switch (value)");
{
foreach (var type in types)
{
var ln = "value" + FirstUpper(type);
var result = f(type, ln);
c.Writeln($"case {type} {ln}: return {result};");
}
}
c.Close();
c.Writeln("return null;");
var m = cl.AddMethod(name, "bool?")
.WithBody(c)
.WithStatic();
m.AddParam("value", "object");
}
void MakeIsNumericMinus()
{
var types = GetTypes(false);
var c = new CSCodeFormatter();
c.Open("switch (value)");
{
foreach (var type in types)
{
var ln = "value" + FirstUpper(type);
var result = IsUnsigned(type) ? "null" : $"-{ln}";
c.Writeln($"case {type} {ln}: return {result};");
}
}
c.Close();
c.Writeln("return null;");
var m = cl.AddMethod("Minus", "object")
.WithBody(c)
.WithStatic();
m.AddParam("value", "object");
}
MakeBinaryOperator("Add", "+");
MakeBinaryOperator("Sub", "-");
MakeBinaryOperator("Mul", "*");
MakeBinaryOperator("Div", "/");
MakeIsNumericMinus();
MakeIsNumericZero("EqualsNumericZero", (type, ln) => $"{ln}.Equals({Zero(type)})");
MakeIsNumericZero("EqualsNumericOne", (type, ln) => $"{ln}.Equals({Number(type, "1")})");
MakeIsNumericZero("EqualsNumericMinusOne", (type, ln) =>
{
if (IsUnsigned(type))
{
return("false");
}
return($"{ln}.Equals({Number(type, "-1")})");
});
MakeIsNumericZero("IsLowerThanZero", (type, ln) =>
{
if (IsUnsigned(type))
{
return("false");
}
return($"{ln} < {Zero(type)}");
});
MakeIsNumericZero("IsLowerThanZeroOrEqual", (type, ln) => $"{ln} <={Zero(type)}");
MakeIsNumericZero("IsGreaterThanZero", (type, ln) => $"{ln} >{Zero(type)}");
MakeIsNumericZero("IsGreaterThanZeroOrEqual", (type, ln) =>
{
if (IsUnsigned(type))
{
return("true");
}
return($"{ln} >= {Zero(type)}");
});
// is Zero
Save(file, cl, "Cs2Py", "Features", subDir);
}