Download Code Generation with Roslyn by Nick Harrison PDF

By Nick Harrison

ISBN-10: 1484222105

ISBN-13: 9781484222102

Learn how Roslyn's new code iteration capability will allow you to write software program that's extra concise, runs swifter, and is less complicated to take care of. you are going to research from real-world company applications to create higher software program by way of letting the pc write its personal code in response to your enterprise common sense already outlined in look up tables.

Code iteration with Rosyln is the 1st e-book to hide this new capability. you'll find out how those ideas can be used to simplify platforms integration in order that if one approach already defines company common sense via search for tables, you could combine a brand new procedure and percentage enterprise common sense by means of permitting the hot process to put in writing its personal enterprise common sense according to already present table-based enterprise logic.

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.

What you will Learn

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

Who This e-book Is For

Back finish builders in very dynamic fast moving enterprise environments. builders inquisitive about integrating diverse platforms throughout an firm also needs to locate this knowledge useful.

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Additional resources for Code Generation with Roslyn

Sample text

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.

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