OCEval

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OCEval is a Coding & Development tool that provides a tiny JIT interpreter for Objective-C, enabling dynamic code execution. It allows developers to run Objective-C code like `eval()` on iOS and OS X platforms.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is OCEval?

OCEval is a compact JIT interpreter designed for Objective-C, offering the capability to dynamically execute Objective-C code, similar to how `eval()` functions in other languages. This tool supports both iOS and OS X development environments and is entirely written in Objective-C. Its development is driven by unit tests, ensuring reliability and functionality. OCEval extends its utility by supporting various low-level APIs, including blocks and C functions, which allows for more flexible and powerful dynamic code manipulation. Developers can use it to dynamically call Objective-C methods, replace method implementations at runtime, and even theoretically build entire applications that can be delivered and updated over a network.

Best used for

Ideal for developers who need to dynamically execute Objective-C code, replace method implementations at runtime, and experiment with code changes without recompilation. Especially valuable for rapid prototyping, debugging, and potentially delivering dynamic updates to applications.

Common actions

execute code dynamically

interpret Objective-C

modify runtime behavior

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Capabilities

Key features

Dynamic Objective-C execution
iOS & OS X support
Low-level API support
Dynamic method replacement
Unit test driven

Target Audience

developer

Integrations

Not yet documented

Pricing & Plans

Open Source

Free

FAQs

What kind of Objective-C syntax does OCEval support?

OCEval supports a range of Objective-C syntax including if/else, do/while, for/in loops, array/dictionary literals, block calls, C external functions, and C structs like CGRect. It also handles increment/decrement operators and basic conditional checks.

Are there any limitations or unsupported features in OCEval?

Yes, OCEval does not support C inline functions, macros like #define or typedef (use original values), complex boolean expressions like ((YES)&&(NO)) (use (YES && NO)), the ternary operator (?:), or direct string formatting like [stringformat:@"%d",aInt].

Can applications using OCEval be submitted to the App Store?

The project explicitly warns that an app submission to the App Store that includes the OCEval framework is likely to be rejected. This is due to the dynamic code execution capabilities, which are generally restricted by Apple's guidelines.

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