Microsoft.PowerFx Namespace

Classes

BasicServiceProvider	Trivial IServiceProvider implementation that allows chaining and composition.
BasicUserInfo	Helper for implementing UserInfo with static values.
CheckContextSummary	Get summary of information from the CheckResult. This can be used for editor features that help write expressions.
CheckResult	Holds work such as parsing, binding, error checking done on a single expression. Different options require different work. Tracks which work is done so that it is not double repeated.
CheckResultExtensions
ConfigExtensions
ConsoleReplOutput	Default implementation of Repl output that writes to console.
DeferredSymbolPlaceholder	Used with a Microsoft.PowerFx.DeferredSymbolTable. This is returned to lazily provide the type for (logical,displayName).
EditorContextScope	Implement aIPowerFxScope for intellisense on top of anEngine instance. A scope is the context for a specific formula bar. This includes helpers to aide in customizing the editing experience.
EditorEngineExtensions
Engine	Expose binding logic for Power Fx. Derive from this to provide evaluation abilities.
ExpressionError	Error message. This could be a compile time error from parsing or binding, or it could be a runtime error wrapped in a ErrorValue.
Features
FormulaValueSerializerSettings	Provide settings to FormulaValues in order to serialize values in different situations.
FormulaWithParameters	Encapsulate a formula and the parameters it has available.
FunctionInfo	Information about a built-in function.
Governor	Throttling object to allow a host to control limits of memory and hardware resources. These virtuals are called by the evaluator, and exceptions thrown by them will abort the evaluation. This is a service passed to RuntimeConfig, and a derived class can override and throw their own host exceptions if hardware limits are exceeded.
InterpreterConfigException	The interpreter is called in an illegal way.
IReplOutputExtensions
NameCollisionException
ObjectMarshaller	Marshal a specific type of object to a record.
ObjectMarshallerProvider	Marshal .Net classes (with fields) to RecordValue. This supports both strong typing and lazy marshalling. It will return a ObjectMarshaller.
OptionSet
ParseResult	Result of parsing an expression.
ParserOptions	Options for parsing an expression.
PowerFxConfig	A container that allows for compiler customization.
PowerFxConfigExtensions
PowerFxREPL	A REPL (Read-Eval-Print Loop) for Power Fx. This accepts input, evaluates it, and prints the result.
PrimitiveMarshallerProvider	Marshalling provider to handle builtin primitive types.
PrimitiveTypeMarshaller	Marshaller for builtin primitives.
ReadOnlySymbolTable	ReadOnly version of a Symbol Table. This feeds functions, variables, enums, etc into the binder. See SymbolTable for mutable version.
ReadOnlySymbolValues	Runtime values corresponding to static values described in a SymbolTable. See SymbolValues for a mutable derived class.
RecalcEngine	Holds a set of Power Fx variables and formulas. Formulas are recalculated when their dependent variables change.
ReflectionFunction	Base class for importing a C# function into Power Fx. Dervied class should follow this convention: class name should folow this convention: "[Method Name]" + "Function" + optional postfix for function orevloading it should have a public static method 'Execute'. this class will reflect over that signature to import to Power Fx.
ReplResult	Result from HandleCommandAsync(String, CancellationToken).
RuntimeConfig	Runtime configuration for the execution of an expression. This can be reused across multiple evals - so it shouldn't have any state that expires such as a cancellation token.
SymbolEntry
SymbolExtensions
SymbolProperties
SymbolTable	Provides symbols to the engine. This includes variables (locals, globals), enums, options sets, and functions. SymbolTables are mutable to support sessionful scenarios and can be chained together. This is a publicly facing class around a Microsoft.PowerFx.Core.Binding.INameResolver.
SymbolValues	Mutable collection for runtime Values for a SymbolTable. Will lazily create a symbol table. To match to an existing symbol table, call CreateValues(ReadOnlySymbolTable, ReadOnlySymbolValues[]).
TableMarshallerProvider	Marshal .Net classes (with fields). This supports strong typing and lazy marshalling. Handles any IEnumerable (including arrays).
TypeCoercionProvider	Convert value to target format.
TypeMarshallerCache	Marshal .net objects into Power Fx values. This allows customizing the marshallers, as well as caching the conversion rules for a given type. This is an immutable object representing a collection of immutable providers.
TypeMarshallerCacheExtensions	Marshal .net objects into Power Fx values. This allows customizing the marshallers, as well as caching the conversion rules for a given type. This is an immutable object representing a collection of immutable providers.
UserInfo	Definition for User object. Names of C# members match the names we get in Power Fx's User object. This has a curated set of user identifiers. This list can grow (hence this is a class, not an interface). Host can specify which symbols are available, and leave these blank if not supported on this host. Some information may require a network call to fetch, so we use task and virtual. Different properties may require different fetches, so let host override each property (rather than a single virtual). Callbacks can throw a CustomFunctionErrorException to specify a runtime error.

Interfaces

IDynamicTypeMarshaller	Some types (like Dictionary, JObject, or DataTable) are dynamic. Dynamic marshallers can take a runtime instance and then inspect the runtime properties and create a strongly-typed FormulaType. Whereas ITypeMarshaller only accepts the static type, so it must marshal these dynamic objects as weakly-typed UntypedObjectType.
IExpressionEvaluator	Evaluate an expression that was successfully bound. Get this from CheckResult.GetEvaluator() extension method.
IReplOutput	Callback interface to write to output. Handles different kinds, which could be mapped to different console colors or output streams.
IRuntimeConfig
ISymbolSlot	A "slot" is the opaque handle to acts as a storage location for a symbol. It can be used for both get and set on symbols. The IR will refer to slots when accessing symbols. Unique slots mean unique symbols. Runtime allocates storage for these slots.
ITypeMarshaller	A marshaller for a given System.Type to a given power fx type. . This can only marshal types that have a static mapping to a FormulaType.
ITypeMarshallerProvider	Handles marshalling a given type. Invoked by the TypeMarshallerCache.

Enums

ErrorKind	Indicates the error on a record in a connected data source. This must be kept in sync with the document enum "ErrorKind".
ErrorSeverity	Severity of errors provided.
OutputKind	Kinds of output from repl.

Delegates

ObjectMarshaller.FieldTypeAndValueMarshallerGetter	Method that should return the Type and Value Marshalling function for a field.
ObjectMarshaller.FieldValueMarshaller	Value Marshalling function for a field.