> For the complete documentation index, see [llms.txt](https://docs.yarnspinner.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yarnspinner.dev/2.2/api/csharp/yarn.compiler.md).

# Yarn.Compiler Namespace

## Summary

Contains classes for compiling Yarn code.

## Classes

| Name                                                                                                              | Description                                                                                                                                                                                                                                                                            |
| ----------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [BasicBlock](/2.2/api/csharp/yarn.compiler/yarn.compiler.basicblock.md)                                           | A basic block is a run of instructions inside a Node. Basic blocks group instructions up into segments such that execution only ever begins at the start of a block (that is, a program never jumps into the middle of a block), and execution only ever leaves at the end of a block. |
| [Compiler](/2.2/api/csharp/yarn.compiler/yarn.compiler.compiler.md)                                               | Compiles Yarn code.                                                                                                                                                                                                                                                                    |
| [DebugInfo](/2.2/api/csharp/yarn.compiler/yarn.compiler.debuginfo.md)                                             | Contains debug information for a node in a Yarn file.                                                                                                                                                                                                                                  |
| [Declaration](/2.2/api/csharp/yarn.compiler/yarn.compiler.declaration.md)                                         |                                                                                                                                                                                                                                                                                        |
| [DeclarationBuilder](/2.2/api/csharp/yarn.compiler/yarn.compiler.declarationbuilder.md)                           | Provides methods for constructing [Declaration](/2.2/api/csharp/yarn.compiler/yarn.compiler.declaration.md) objects.                                                                                                                                                                   |
| [DeferredTypeDiagnostic](/2.2/api/csharp/yarn.compiler/yarn.compiler.deferredtypediagnostic.md)                   |                                                                                                                                                                                                                                                                                        |
| [Diagnostic](/2.2/api/csharp/yarn.compiler/yarn.compiler.diagnostic.md)                                           | A diagnostic message that describes an error, warning or informational message that the user can take action on.                                                                                                                                                                       |
| [FunctionTypeBuilder](/2.2/api/csharp/yarn.compiler/yarn.compiler.functiontypebuilder.md)                         | Provides methods for constructing [FunctionType](/2.2/api/csharp/yarn/yarn.functiontype.md) objects.                                                                                                                                                                                   |
| [IndentAwareLexer](/2.2/api/csharp/yarn.compiler/yarn.compiler.indentawarelexer.md)                               | A Lexer subclass that detects newlines and generates indent and dedent tokens accordingly.                                                                                                                                                                                             |
| [InstructionCollectionExtensions](/2.2/api/csharp/yarn.compiler/yarn.compiler.instructioncollectionextensions.md) | Contains extension methods for producing [BasicBlock](/2.2/api/csharp/yarn.compiler/yarn.compiler.basicblock.md) objects from a Node.                                                                                                                                                  |
| [Position](/2.2/api/csharp/yarn.compiler/yarn.compiler.position.md)                                               | Represents a position in a multi-line string.                                                                                                                                                                                                                                          |
| [Range](/2.2/api/csharp/yarn.compiler/yarn.compiler.range.md)                                                     | Represents a range of text in a multi-line string.                                                                                                                                                                                                                                     |
| [Utility](/2.2/api/csharp/yarn.compiler/yarn.compiler.utility.md)                                                 | Utility methods for working with line tags.                                                                                                                                                                                                                                            |

## Namespaces

| Name                                                                | Description                                                                       |
| ------------------------------------------------------------------- | --------------------------------------------------------------------------------- |
| [Yarn.Compiler.Upgrader](/2.2/api/csharp/yarn.compiler.upgrader.md) | Contains classes for upgrading Yarn code to more recent versions of the language. |

## Structs

| Name                                                                                  | Description                                                                                    |
| ------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------- |
| [CompilationJob](/2.2/api/csharp/yarn.compiler/yarn.compiler.compilationjob.md)       | An object that contains Yarn source code to compile, and instructions on how to compile it.    |
| [CompilationResult](/2.2/api/csharp/yarn.compiler/yarn.compiler.compilationresult.md) | The result of a compilation.                                                                   |
| [FileParseResult](/2.2/api/csharp/yarn.compiler/yarn.compiler.fileparseresult.md)     | Contains the result of parsing a single file of source code.                                   |
| [StringInfo](/2.2/api/csharp/yarn.compiler/yarn.compiler.stringinfo.md)               | Information about a string. Stored inside a string table, which is produced from the Compiler. |