Expression Class

Definition

Namespace:

AdaptiveExpressions

Assembly:

AdaptiveExpressions.dll

Package:

AdaptiveExpressions v4.18.1

An expression which can be analyzed or evaluated to produce a value.

public class Expression

type Expression = class

Public Class Expression

Inheritance

Object

Expression

Derived

AdaptiveExpressions.Constant

AdaptiveExpressions.TriggerTrees.Clause

Remarks

This provides an open-ended wrapper that supports a number of built-in functions and can also be extended at runtime. It also supports validation of the correctness of an expression and evaluation that should be exception free.

Constructors

Expression(ExpressionEvaluator, Expression[])	Initializes a new instance of the Expression class. Expression constructor.
Expression(String, Expression[])	Initializes a new instance of the Expression class. Built-in expression constructor.

Fields

Functions

Dictionary of function => ExpressionEvaluator.

Properties

Children	Gets or sets children expressions.
Evaluator	Gets expression evaluator.
ReturnType	Gets expected result of evaluating expression.
Type	Gets type of expression.

Methods

Accessor(String, Expression)	Construct and validate a property accessor.
AndExpression(Expression[])	Construct and validate an And expression.
ConstantExpression(Object)	Construct a constant expression.
DeepEquals(Expression)	Do a deep equality between expressions.
EqualsExpression(Expression[])	Construct and validate an Equals expression.
LambaExpression(EvaluateExpressionDelegate)	Construct an expression from a EvaluateExpressionDelegate.
Lambda(Func<Object,Object>)	Construct an expression from a lambda expression over the state.
Lookup(String)	Lookup a ExpressionEvaluator (function) by name.
MakeExpression(ExpressionEvaluator, Expression[])	Make an expression and validate it.
MakeExpression(String, Expression[])	Make an expression and validate it.
NotExpression(Expression)	Construct and validate a Not expression.
OrExpression(Expression[])	Construct and validate an Or expression.
Parse(String, EvaluatorLookup)	Parse an expression string into an expression object.
References()	Return the static reference paths to memory.
ReferenceWalk(Expression, Func<Expression,Boolean>)	Walking function for identifying static memory references in an expression.
SetPathToValue(Expression, Expression)	Construct and validate an Set a property expression to a value expression.
SetPathToValue(Expression, Object)	Construct and validate an Set a property expression to a value expression.
ToString()	Returns a string that represents the current object.
TryEvaluate(IMemory, Options)	Evaluate the expression.
TryEvaluate(Object, Options)	Evaluate the expression.
TryEvaluate<T>(IMemory, Options)	Evaluate the expression.
TryEvaluate<T>(Object, Options)	Evaluate the expression.
Validate()	Validate immediate expression.
ValidateTree()	Recursively validate the expression tree.

Operators

Implicit(String to Expression)

allow a string to be implicitly assigned to an expression property.

Extension Methods

DisjunctiveNormalForm(Expression)	Rewrite expression into disjunctive normal form.
PushDownNot(Expression)	Rewrite the expression by pushing not down to the leaves.