Checking if argumentSyntax is valid to be invoked with a method that has IParameterSymbol

Question

I have 2 methods:

public void Method1(object[] args); // In Class A
public void Method2(string a, SomeClass b); // In Class B

And 2 Classes:

public class SomeClass {}
public class FromSomeClass : SomeClass {}

And a code that I analyze using Roslyn:

var c = new FromSomeClass();
Method1("a", c);

I want to analyze Method1 Call and check if it also a valid Method2 Call, meaning:

Method2("a", c); // will this run ok?

I got to the point where I got Method2 from the semantic model (IParameterSymbol) and for each argument in the invocation I have the I have the ITypeSymbol. How do I check if the argument type is valid for this IParameterSymbol? (both inheritance and implicit conversion)?

Answer 1

You can call CSharpCompilation.ClassifyConversion or VisualBasicCompilation.ClassifyConversion to figure out if a conversion exists. Note that the methods are language-specific since each language has some unique rules for conversions.