Class TypeBasedExpressionRewriter

An expression rewriter that rewrites using a set of user defined lambdas that are applied when the runtime type of the expression matches the user supplied value.

Inheritance

System.Object

ScopedExpressionVisitorBase

ScopedExpressionVisitor<System.Linq.Expressions.ParameterExpression>

TypeBasedExpressionRewriter

Inherited Members

ScopedExpressionVisitor<ParameterExpression>.TryLookup(ParameterExpression, ParameterExpression)

ScopedExpressionVisitor<ParameterExpression>.Push(IEnumerable<ParameterExpression>)

ScopedExpressionVisitor<ParameterExpression>.Push(IEnumerable<KeyValuePair<ParameterExpression, ParameterExpression>>)

ScopedExpressionVisitor<ParameterExpression>.Pop()

ScopedExpressionVisitor<ParameterExpression>.GlobalScope

ScopedExpressionVisitorBase.VisitBlock(BlockExpression)

ScopedExpressionVisitorBase.VisitBlockCore(BlockExpression)

ScopedExpressionVisitorBase.VisitCatchBlock(CatchBlock)

ScopedExpressionVisitorBase.VisitCatchBlockCore(CatchBlock)

ScopedExpressionVisitorBase.VisitLambda<T>(Expression<T>)

ScopedExpressionVisitorBase.VisitLambdaCore<T>(Expression<T>)

Namespace: System.Linq.CompilerServices

Assembly: Nuqleon.Linq.CompilerServices.dll

Syntax

public class TypeBasedExpressionRewriter : ScopedExpressionVisitor<ParameterExpression>

Constructors

TypeBasedExpressionRewriter()

Instantiates the type-based expression rewriter.

Declaration

public TypeBasedExpressionRewriter()

Methods

Add(Type, Func<Expression, Expression>)

Adds a rewriter for a specified type. The user supplied rewriter is applied whenever an expression type can be assigned to the user supplied type.

Declaration

public void Add(Type type, Func<Expression, Expression> rewriter)

Parameters

Type	Name	Description
System.Type	type	The type that triggers the rewriter.
System.Func<System.Linq.Expressions.Expression, System.Linq.Expressions.Expression>	rewriter	The expression rewriter.

AddDefinition(Type, Func<Expression, Expression>)

Adds a rewriter for a specified generic type definition. The user supplied rewriter is applied whenever an expression type implements or extends some closure over the user supplied generic type definition.

Declaration

public void AddDefinition(Type type, Func<Expression, Expression> rewriter)

Parameters

Type	Name	Description
System.Type	type	The type that triggers the rewriter.
System.Func<System.Linq.Expressions.Expression, System.Linq.Expressions.Expression>	rewriter	The expression rewriter.

GetState(ParameterExpression)

Maps the specified parameter on state tracked in the scoped symbol table. This method gets called for each declaration site of a variable.

Declaration

protected override ParameterExpression GetState(ParameterExpression parameter)

Parameters

Type	Name	Description
System.Linq.Expressions.ParameterExpression	parameter	Parameter expression that's being declared.

Returns

Type	Description
System.Linq.Expressions.ParameterExpression	State to associate with the given parameter.

Overrides

System.Linq.CompilerServices.ScopedExpressionVisitor<System.Linq.Expressions.ParameterExpression>.GetState(System.Linq.Expressions.ParameterExpression)

Visit(Expression)

Visits an expression, looping over the list of user supplied rewriters, and rewriting the expression if the expression type matches any of the supplied rewriters.

Declaration

public override Expression Visit(Expression node)

Parameters

Type	Name	Description
System.Linq.Expressions.Expression	node	The expression.

Returns

Type	Description
System.Linq.Expressions.Expression	The result of the visit.