By Nick Harrison
One of the numerous merits you can find is that Roslyn makes use of an leading edge method of compiler layout, beginning up the internal workings of the compiler technique. You will learn how one can see the syntax tree that Roslyn is development because it compiles your code. Additionally, you will examine to feed it your personal syntax tree that you create at the fly.
- Structure common sense to be kept in database design
- Build complicated conditional good judgment according to look up facts within the database
- Compile code that you just generate programmatically
- Discover generated code and run it dynamically to enforce new company logic
- Debug difficulties in generated code
- Deploy and entry generated code
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Additional resources for Code Generation with Roslyn
Listing 4-16 shows an example that sets the most common compilation options. Listing 4-16. Result; Generating Code With this background information, you now know that generating code is simply a matter of adding the SyntaxNodes to the SyntaxTree that you are working on. You have a few options for how to do this. You have seen how CSharpSyntaxTree can be used to parse text and return a SyntaxTree. You can also use the CSharp. SyntaxFactory to create various SyntaxNodes and SyntaxTokens. Here, you will use both of these techniques to build a very simple code generator.
The actual upper bound for properties in a class is in the millions, but good design advises you to cut it off well before then. This method can be a bit more complicated because you have to provide an INamedTypeSymbol for the second parameter. The easiest way to get an INamedTypeSymbol is through the Compilation object. This seems a little bit counterintuitive because you are generating code, not compiling, but the Compilation object has the context to properly specify the details for the INamedTypeSymbol.
Listing 4-19. Identifier(className); Finally, you replace the old token with the new one, as shown in Listing 4-20. Listing 4-20. ReplaceToken(identifierToken, newIdentifier)); 49 Chapter 4 ■ An Introduction to Roslyn ■■Tip Always remember that all of the Roslyn objects are immutable. Any method you call that changes an object will return a new instance of the object. If you ignore the return value from a function like ReplaceToken, you will never see the effect of the replace. Listing 4-21 shows you how to call this method and display the generated class.
Code Generation with Roslyn by Nick Harrison