Provides methods for constructing expressions at runtime More...

Static Public Member Functions
static LambdaExpression	MakePropertyOrFieldSelector (Type type, string propertyOrField)
	Constructs a selector of the form: x => x.propertyOrField where x is an instance of 'type' More...

static Expression< Func< T, TProperty > >	MakePropertyOrFieldSelector< T, TProperty > (string propertyOrField)
	Constructs a selector of the form: x => x.propertyOrField where x is an instance of 'type' More...

static Expression< Func< T, T, bool > >	MakeBinaryComparisonLambda< T > (ExpressionType type)
	Constructs a lambda expression that accepts two parameters of type T and applies the specified binary comparison and returns the boolean result. More...

static bool	IsBinaryComparison (this ExpressionType type)
	Determines whether or not the specified type is a binary comparison. More...

static IEnumerable< Expression >	AsEnumerable (this Expression expression)
	Converts the specified expression into an enumerable of expressions by walking the expression tree More...

static IEnumerable< T >	OfType< T > (this Expression expression)
	Returns all the expressions of the specified type in the given expression tree More...

static T	Single< T > (this Expression expression)
	Returns the single expression of the specified type or throws if none or more than one expression of the specified type is contained within the expression. More...

static T	Single< T > (this IEnumerable< Expression > expressions)
	Returns the single expression of the specified type or throws if none or more than one expression of the specified type is contained within the expression. More...

Detailed Description

Provides methods for constructing expressions at runtime

Definition at line 26 of file ExpressionBuilder.cs.

Member Function Documentation

◆ MakePropertyOrFieldSelector()

static LambdaExpression QuantConnect.Util.ExpressionBuilder.MakePropertyOrFieldSelector	(	Type	type,
		string	propertyOrField
	)

static

Constructs a selector of the form: x => x.propertyOrField where x is an instance of 'type'

Parameters

type	The type of the parameter in the expression
propertyOrField	The name of the property or field to bind to

Returns: A new lambda expression that represents accessing the property or field on 'type'

Definition at line 34 of file ExpressionBuilder.cs.

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◆ MakePropertyOrFieldSelector< T, TProperty >()

static Expression<Func<T, TProperty> > QuantConnect.Util.ExpressionBuilder.MakePropertyOrFieldSelector< T, TProperty > ( string propertyOrField )

static

Constructs a selector of the form: x => x.propertyOrField where x is an instance of 'type'

Template Parameters

T	The type of the parameter in the expression
TProperty	The type of the property or field being accessed in the expression

Parameters

propertyOrField The name of the property or field to bind to

Returns: A new lambda expression that represents accessing the property or field on 'type'

Definition at line 49 of file ExpressionBuilder.cs.

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◆ MakeBinaryComparisonLambda< T >()

static Expression<Func<T, T, bool> > QuantConnect.Util.ExpressionBuilder.MakeBinaryComparisonLambda< T > ( ExpressionType type )

static

Constructs a lambda expression that accepts two parameters of type T and applies the specified binary comparison and returns the boolean result.

Definition at line 58 of file ExpressionBuilder.cs.

◆ IsBinaryComparison()

static bool QuantConnect.Util.ExpressionBuilder.IsBinaryComparison ( this ExpressionType type )

static

Determines whether or not the specified type is a binary comparison.

Definition at line 75 of file ExpressionBuilder.cs.

◆ AsEnumerable()

static IEnumerable<Expression> QuantConnect.Util.ExpressionBuilder.AsEnumerable ( this Expression expression )

static

Converts the specified expression into an enumerable of expressions by walking the expression tree

Parameters

expression The expression to enumerate

Returns: An enumerable containing all expressions in the input expression

Definition at line 97 of file ExpressionBuilder.cs.

◆ OfType< T >()

static IEnumerable<T> QuantConnect.Util.ExpressionBuilder.OfType< T > ( this Expression expression )

static

Returns all the expressions of the specified type in the given expression tree

Template Parameters

T	The type of expression to search for

Parameters

expression The expression to search

Returns: All expressions of the given type in the specified expression

Type Constraints

T

:

Expression

Definition at line 110 of file ExpressionBuilder.cs.

◆ Single< T >() [1/2]

static T QuantConnect.Util.ExpressionBuilder.Single< T > ( this Expression expression )

static

Returns the single expression of the specified type or throws if none or more than one expression of the specified type is contained within the expression.

Template Parameters

T	The type of expression to search for

Parameters

expression The expression to search

Returns: Expression of the specified type

Type Constraints

T

:

Expression

Definition at line 123 of file ExpressionBuilder.cs.

◆ Single< T >() [2/2]

static T QuantConnect.Util.ExpressionBuilder.Single< T > ( this IEnumerable< Expression > expressions )

static

Returns the single expression of the specified type or throws if none or more than one expression of the specified type is contained within the expression.

Template Parameters

T	The type of expression to search for

Parameters

expressions The expressions to search

Returns: Expression of the specified type

Type Constraints

T

:

Expression

Definition at line 136 of file ExpressionBuilder.cs.

The documentation for this class was generated from the following file:

Common/Util/ExpressionBuilder.cs

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ MakePropertyOrFieldSelector()

◆ MakePropertyOrFieldSelector< T, TProperty >()

◆ MakeBinaryComparisonLambda< T >()

◆ IsBinaryComparison()

◆ AsEnumerable()

◆ OfType< T >()

◆ Single< T >() [1/2]

◆ Single< T >() [2/2]