|
public GenerateCodeFromExpression ( CodeExpression expression, |
||
| expression | CodeExpression | |
| writer | ||
| options | ||
| return | void | |
// courtesy of http://metasharp.net/index.php?title=More_technical_Csharp#Generating_the_.27is.27_operator
public static string ExpressionToString(CodeExpression expr, CodeDomProvider provider)
{
using (TextWriter m = new StringWriter())
{
provider.GenerateCodeFromExpression(expr, m, new CodeGeneratorOptions());
return m.ToString();
}
}
private static string BuildCodeExtractingModelType(CodeDomProvider provider)
{
var getType = new CodeMethodInvokeExpression
(
new CodeThisReferenceExpression(),
"GetType"
);
var baseType = new CodeFieldReferenceExpression
(
getType,
"BaseType"
);
var getFirstGenericArgument = new CodeArrayIndexerExpression
(
new CodeMethodInvokeExpression
(
baseType,
"GetGenericArguments"
),
new CodePrimitiveExpression(0)
);
var fullName = new CodeFieldReferenceExpression
(
getFirstGenericArgument,
"FullName"
);
string modelTypeCode;
using (var writer = new StringWriter())
{
provider.GenerateCodeFromExpression(fullName, writer, new CodeGeneratorOptions());
modelTypeCode = writer.ToString();
}
return modelTypeCode;
}
private static string GenerateCode(CodeObject c, CodeDomProvider provider)
{
var sb = new StringBuilder();
var writer = new StringWriter(sb);
var options = new CodeGeneratorOptions();
if (c is CodeStatement)
{
provider.GenerateCodeFromStatement((CodeStatement)c, writer, options);
}
else if (c is CodeCompileUnit)
{
provider.GenerateCodeFromCompileUnit((CodeCompileUnit)c, writer, options);
}
else if (c is CodeExpression)
{
provider.GenerateCodeFromExpression((CodeExpression)c, writer, options);
}
else if (c is CodeTypeMember)
{
provider.GenerateCodeFromMember((CodeTypeMember)c, writer, options);
}
else if (c is CodeTypeDeclaration)
{
provider.GenerateCodeFromType((CodeTypeDeclaration)c, writer, options);
}
else if (c is CodeNamespace)
{
provider.GenerateCodeFromNamespace((CodeNamespace)c, writer, options);
}
else
{
Assert.False(true, $"Unknown type: {c.GetType()}");
}
return sb.ToString();
}
private static string GenerateCode(CodeObject c, CodeDomProvider provider)
{
var sb = new StringBuilder();
var writer = new StringWriter(sb);
var options = new CodeGeneratorOptions();
if (c is CodeStatement)
{
provider.GenerateCodeFromStatement((CodeStatement)c, writer, options);
}
else if (c is CodeCompileUnit)
{
provider.GenerateCodeFromCompileUnit((CodeCompileUnit)c, writer, options);
}
else if (c is CodeExpression)
{
provider.GenerateCodeFromExpression((CodeExpression)c, writer, options);
}
else if (c is CodeTypeMember)
{
provider.GenerateCodeFromMember((CodeTypeMember)c, writer, options);
}
else if (c is CodeTypeDeclaration)
{
provider.GenerateCodeFromType((CodeTypeDeclaration)c, writer, options);
}
else if (c is CodeNamespace)
{
provider.GenerateCodeFromNamespace((CodeNamespace)c, writer, options);
}
else
{
throw new ArgumentException($"Tests not set up for unexpected type: {c.GetType()}");
}
return sb.ToString();
}
public void GenerateDeclaration(TextWriter tw, CodeDomProvider provider, CodeGeneratorOptions opts, CodeTypeReference returnType, CodeParameterDeclarationExpression[] parameters)
{
tw.Write(string.Format("Public Shared {0} Operator CType", OperatorName));
tw.Write("(");
for (int i = 0; i < parameters.Length; i++)
{
var parameter = parameters[i];
provider.GenerateCodeFromExpression(parameter, tw, opts);
if (i != (parameters.Length - 1))
tw.Write(", ");
}
tw.Write(") As ");
provider.GenerateCodeFromExpression(new CodeTypeReferenceExpression(returnType), tw, opts);
tw.WriteLine();
}