Project RoslynExposing the C# and Visual Basic compilers’ code analysis

Dustin CampbellSenior Program ManagerMicrosoft

Project Codename “Roslyn”

• Scope• Managed compilers & language services

• Code analysis APIs

• Scripting APIs

• Language service extensibility

• Read-Eval-Print-Loop (REPL)

• Ship Date• v.Next + n, where n > 0

Syntax Tree API Symbol APIBinding and Flow Analysis

APIsEmit APIParser

Metadata Import

Binder IL Emitter

Symbols

Language Service

Compiler API

Compiler Pipeline

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Signatu

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Extract Meth

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Design Choices

Resilient

Immutable Complete

Efficient

Demo: Compiler APIs

Major PlayersSyntax Nodes

class C{

void M(){}

}// C▫

CompilationUnit

TypeDeclaration

MethodDeclaration

ParameterList Block

SyntaxTreeGetRoot

Major PlayersSyntax Tokens

class C{

void M(){}

}// C▫

CompilationUnit

TypeDeclaration

MethodDeclaration

ParameterList Block

SyntaxTreeGetRoot

EOF

class C { }

void M

( ) { }

Major PlayersSyntax Tokens

EOF

class C

{

}

void M ( )

{

}

class∙C{∙∙∙∙void∙M()∙∙∙∙{∙∙∙∙}}// C▫

Major PlayersSyntax “Trivia”

EOF

class C

{

}

void M ( )

{

}

SP EOL

EOL

EOL

EOL

EOL

EOL

class∙C{∙∙∙∙void∙M()∙∙∙∙{∙∙∙∙}}// C▫

// C

SPx4

SPx4

SPx4

SP

SyntaxTrees

References

Compilation• Symbols

• Diagnostics

• Emit

Major PlayersCompilations, References and Symbols

Major PlayersSemantics

Compilation

SemanticModel

• Binding Information

• Conversion Classification

• Flow Analysis

• Overload Resolution

• Etc.

GetSemanticModel(tree)

Major PlayersWorkspace, Solutions, Projects and Documents

Apply

Edit Edit

SyntaxTree

Compilation

Events (e.g. key presses)

Demo: Building a Quick Fix

• Install the Roslyn CTP

• Try out the APIs

• Give us feedback!

Next Steps

Dev Center:http://msdn.com/roslyn

Forum:http://social.msdn.microsoft.com/forums/en-us/roslyn

Email:dustinca@microsoft.com