Roslyn Cookbook

Implementing parser support for a new C# language feature

Lexical analysis and Syntax analysis (Parsing) are initial phases of the C# compiler that transform the input source text into a syntax tree with nodes and tokens and reports syntax diagnostics. This section will enable you to add the lexer and parser support for a new C# language feature: Switch operator (?::). For details on the intended functionality of this operator, read the section New language feature: Switch Operator (?::) at the start of this chapter. For details on the grammar and syntax definitions for this operator, read the previous recipe.