microsoft/Power-Fx

Features

• Low-Code Formula Languages - Provides a declarative low-code formula language based on Excel syntax for standardizing business logic across applications.
• Formula Evaluators - Functions as a formula evaluator that computes results from variable inputs based on a defined set of language rules.
• Data Provider Abstractions - Provides a standardized abstraction layer to connect formula-based logic to external data sources for querying and pushing records.
• Abstract Syntax Tree Parsers - Implements components that transform formula strings into structured tree representations for logical analysis and execution.
• Context-Aware Variable Resolution - Provides mechanisms for retrieving values from data objects based on hierarchical scope and current execution context.
• Cross-Application Logic Standards - Enables the sharing of consistent functional rules and calculation logic across multiple different platforms and user interfaces.
• Cross-Language Logic Standardization - Standardizes the semantics and execution of business logic expressions across different software applications.
• Declarative Logic Frameworks - Provides a framework for expressing functional rules and data transformations using a high-level spreadsheet-like syntax.
• Environment Variable Resolution - Resolves variable names and references by retrieving values from the runtime environment context.
• Expression Evaluators - Provides an engine for processing mathematical and logical expressions based on declarative language rules.
• Expression Tree Evaluators - Executes logical operations by recursively traversing the formula's abstract syntax tree.
• Core Business Logic - Implements a processing engine for defining the primary business rules and calculations of an application via formulas.
• Expression Type Resolution - Determines the expected data types of dynamic formula expressions by analyzing inputs and operators.
• Formula Expression Parsers - Evaluates complex formula expressions by parsing them according to defined language rules to produce consistent results.
• Data Abstraction Layers - Implements an abstraction layer that decouples the formula engine logic from specific external data storage backends.
• External Data Integrations - Provides mechanisms to connect to external data sources to enrich formulas with additional real-time context.
• Query Abstraction Layers - Implements a query abstraction layer that provides a unified interface for executing data queries across different storage engines.
• Unified Data Provider Interfaces - Ships a standardized communication layer that translates formula queries into specific API requests for external backend services.
• Lazy Evaluation - Employs computational techniques to delay the evaluation of formula expressions until the final value is explicitly requested.
• AST Visitor Patterns - Uses the visitor design pattern to walk the expression tree for compilation and evaluation purposes.