rhaiscript/rhai

Features

• AST-Based Execution - Processes source code by transforming it into an abstract syntax tree for optimization and repeated execution.
• Embedded Scripting Engines - Implements a lightweight scripting engine that can be integrated into a host application for dynamic logic and data exchange.
• Embedded Scripting for Rust - Integrates a dynamic scripting language into Rust applications to allow users to define custom logic and automation.
• Native Type Mappings - Transforms native Rust data types, including primitives and collections, into a dynamic format compatible with the script engine.
• Global Function Registrations - Registers native functions into a shared global namespace for direct access within scripts without requiring imports.
• Native Type Bridges - Provides a dynamic layer and bridge for any native type that supports cloning to be used in scripts.
• Parsed AST Caching - Transforms source code into an abstract syntax tree and caches it to avoid redundant parsing during repeated execution.
• AST Optimizations - Simplifies the abstract syntax tree through optimization passes that eliminate dead code and pre-evaluate constant arguments.
• Native Module Registration - Uses procedural macros to expose host functions, constants, and type aliases as native modules in the engine.
• Primitive Data Types - Supports a comprehensive set of primitive data types including integers, floats, decimals, booleans, strings, arrays, and maps.
• Domain Specific Languages - Provides a framework for designing specialized languages with custom syntax, operators, and restricted feature sets.
• Dynamic Object Maps - Provides hash dictionaries for storing and retrieving key-value pairs to modify properties dynamically at runtime.
• Dynamic Script Execution - Evaluates and runs strings of code at runtime to modify application logic and state without recompilation.
• Embedded Scripting Languages - Implements a dynamically typed language designed for integration into Rust applications for custom logic.
• Expression Evaluators - Computes the result of a script expression and returns the resulting value back to the host application.
• External Variable Mapping - Allows the host application to map external Rust values and objects into the script's execution context.
• Foreign Function Bindings - Maps native host functions and closures into the scripting environment via a registration system for bidirectional communication.
• Function-Pointer Callbacks - Provides mechanisms to map script-defined functions to native memory addresses so the host application can trigger runtime logic.
• Host Function Exposure - Provides mechanisms for registering native Rust functions to be callable from within the scripting environment.
• Host-to-Script Data Passing - Shares host values with scripts as variables or constants via an external scope.
• Host-to-Script Function Invocations - Executes specific functions defined within a script from the host language with custom arguments and scope management.
• Host Type Exposure - Maps host data types into the scripting environment using custom display names, methods, and indexers.
• Interface Value Wrapping - Wraps native Rust data in dynamic containers to enable seamless interoperability and runtime type switching between host and script.
• Language Extension APIs - Provides APIs and a plugin system powered by procedural macros to add custom functionality to the language.
• Feature Restrictions - Disables specific keywords, operators, or expression types to constrain the capabilities of the script.
• Module Organization - Groups related functions and types into named namespaces to manage scope and code splitting.
• Script Module Resolution - Implements mechanisms for discovering and importing external script files based on configurable search paths.
• Native Function Pointer Invocations - Provides mechanisms for calling native functions via memory addresses mapped to script-accessible pointers.
• Native Interoperability Layers - Provides a system for mapping Rust types and functions into a scripting environment for seamless communication.
• Native-to-Script Function Invocations - Executes script-defined functions from within a native host function by passing function pointers as parameters.
• Domain Specific Languages - Provides a flexible framework for creating specialized languages with custom operators, syntax, and restricted environments.
• Script Variable Management - Implements mechanisms for defining, storing, and overriding variables within the scripting environment.
• Sandboxed Code Execution Environments - Provides a restricted execution environment with resource limits to securely run untrusted code.
• Runtime Stability Guards - Prevents stack overflows and runaway execution to ensure host stability when running untrusted code.
• Runtime Type Identification - Provides utilities to determine the data type of a value during script execution.
• Runtime Type Inspection - Provides utilities to determine the underlying data type of a dynamic value during runtime execution.
• Source Code Modularization - Organizes script logic into dynamically loadable modules to manage large codebases.
• Dynamic Variable Assignments - Supports a dynamically typed environment where variables can change types during execution.
• Variable Assignments - Provides core language primitives for binding values to identifiers via assignment operators.
• Execution Sandboxes - Implements an isolated runtime environment that restricts scripts from mutating the host or causing stack overflows.
• AST Optimization Compilers - Transforms script source code into an optimized abstract syntax tree for efficient repeated execution.
• Native Function Bindings - Creates script-accessible function pointers that trigger native host functions or closures.
• Custom Scripting Functions - Triggers functions defined within a script from the host application to execute custom logic.
• Custom Type Method Registration - Enables host functions to be registered as methods on custom types, allowing scripts to manipulate native state.
• Sandbox Resource Caps - Prevents resource exhaustion and stack overflows by tracking execution progress and capping operation counts in a sandbox.
• Keyword and Operator Restrictions - Provides the ability to disable specific keywords or operators to create constrained, domain-specific language surfaces.
• Dynamic Typing - Implements a dynamic typing system allowing variables to hold various built-in datatypes interchangeably at runtime.
• Execution Resource Limiters - Caps maximum operations, function calls, and memory use to prevent resource exhaustion in the engine.
• Data Serialization - Provides mechanisms for encoding and parsing script data types into external formats using standardized frameworks.
• Binary Object Storage - Handles packed arrays of bytes as large binary objects for efficient raw data storage.
• Stripped-Down Engine Configurations - Allows creation of a minimal engine environment with basic arithmetic and logic to reduce binary footprint.
• Runtime Behavior Configuration - Allows modifying application behavior at runtime by executing script-based rules without recompiling the binary.
• Custom Language Definitions - Provides a framework for defining new language parsers and symbol recognition rules for domain-specific languages.
• Custom Parser Definitions - Provides specifications for recognizing language objects and handling non-standard constructs using user-defined state.
• Syntax Parser Interceptions - Allows the engine to register mini-parsers that handle non-standard syntax and custom operators.
• AST Code Pruning - Removes unreachable code blocks and propagates constants within the compiled AST before evaluation.
• Script Object State Serializations - Persists the current set of variables and constants to allow saving and restoring the script environment.
• Script State Persistence - Stores variables and constants in a dedicated state container to maintain data across multiple script evaluations.
• Dynamic Library Loading - Provides the ability to load shared libraries at runtime to extend the engine's functionality.
• Anonymous Functions - Supports the definition of anonymous functions that capture surrounding scope to persist state.
• Binary Blob Management - Provides utilities for creating and manipulating raw binary blob objects that grow and shrink dynamically.
• Binary Data Conversions - Transforms raw byte arrays into integer arrays or UTF-8 strings for further processing.
• Binary Data Writing - Encodes strings as byte streams and writes integers in specific endian orders into binary positions.
• Binary Size Optimizations - Prunes unused types and language features during compilation to reduce the final executable binary size.
• Byte Sequence Handling - Provides low-level manipulation of raw byte arrays, including padding, truncating, and concatenation.
• Byte Stream Manipulations - Implements operations on binary objects including slicing, padding, reversing, and draining bytes.
• Constant-Folding Optimizations - Implements compiler optimizations that evaluate expressions with constant operands at compile time to simplify the AST.
• Constant Folding Prevention - Allows marking native functions as volatile to prevent constant folding during compilation.
• Dead Code Elimination Engines - Removes expressions and statements without side effects during compilation to reduce script size and overhead.
• Custom Operator Implementations - Maps host functions to symbols or overloaded names to provide language-level operator overloading for custom types.
• Operator Binding Definitions - Assigns custom symbols to operations with specific binding strengths to control how expressions are parsed.
• Evaluatable Syntax Extensions - Registers new expression patterns and statement types that are parsed and evaluated via a callback.
• String Deduplication - Stores unique strings only once to reduce memory consumption when handling high volumes of text data.
• Execution Context Management - Modifies the current execution context, including variable scopes and call depth, during script evaluation.
• Explicit This Binding Techniques - Allows associating a specific object with a function call to serve as the internal this context.
• Function Metadata Inspection - Provides utilities to analyze high-level properties of functions, including parameters and documentation.
• Host-Linked Property Definitions - Maps script property access to specific host functions to handle the retrieval and modification of data.
• Host-Script Scope Sharing - Passes host values into scripts as variables or constants without requiring specialized trait implementations.
• Scope Constant Injections - Adds predefined values or custom types into a script execution environment as immutable references.
• Volatile Function Declarations - Prevents the optimizer from evaluating functions with unstable return values during the compilation process.
• Language Feature Restrictions - Limits scripts to expressions or removes keywords to prevent the use of dangerous language features.
• Ownership Transfer - Transfers data ownership during assignment to avoid the cost of cloning large objects.
• Looping Restrictions - Enables the blocking of loop and while constructs to guarantee that scripts terminate.
• Mixed-Type Arrays - Provides support for ordered lists of mixed types with built-in methods to grow, shrink, and access elements.
• Operator Overloading - Allows replacing built-in arithmetic or comparison operations by registering host functions under operator names.
• Parser Service Exposure - Exposes the tokenizer and parser as services to allow the definition of custom syntax and operators at runtime.
• Pure Functions - Allows marking methods as pure to enable operations on constant values without triggering mutation errors.
• Reference-Based Data Access - Allows the host to obtain references to internal script data to avoid ownership transfer of dynamic values.
• Script Execution Termination - Allows the host application to manually terminate long-running scripts to ensure system stability.
• Script Unit Composition - Allows grouping multiple functions and scripts into a single unified execution unit via AST merging.
• Strict Variable Checking - Validates that all variables are defined during compilation to prevent runtime errors from missing definitions.
• Syntax and Variable Error Detection - Detects undefined variables and missing imports during compilation to prevent runtime failures.
• Assignment Optimizations - Rewrites simple assignment expressions into compound assignments to reduce memory cloning and increase speed.
• Arithmetic Operations - Executes fundamental mathematical operations including addition, subtraction, multiplication, and division.
• Script-to-Native Closure Wrappers - Wraps scripted functions into native closures to be used as callbacks within the host application.
• Execution State Serializers - Converts global variables and constants into a serializable format to save and restore the execution environment.
• Engine Behavior Configuration - Provides interfaces to modify how the engine handles property access and state tags during runtime evaluation.
• Runtime Engine Extensions - Allows loading sets of functions and modules into engine instances to share configurations.
• Evaluation Environment Restrictions - Enables the creation of restricted evaluation environments with selective functional packages and operators.
• Module Scope Isolation - Encapsulates functions and variables within named modules to isolate scope and prevent naming collisions.
• Modular Plugin Architectures - Enables the creation of extensible software where third parties can add functionality via external scripts and modular code.
• Dynamic Value Casting - Converts dynamic script values into specific native types using safe or panicking methods.
• Script Evaluation Monitoring - Tracks the evaluation progress of running scripts and allows the host to terminate execution.
• Custom Debugging Implementations - Implements a debugging interface that hooks custom callbacks to track steps and manage breakpoints.
• Stack Trace Inspections - Provides utilities for retrieving and analyzing runtime call stacks to diagnose execution flow.
• Shared State Captures - Captures external variables or shared state within closures to let scripts modify data in the host environment.

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