Implement 사전(Dict)

[rycont]

새 타입으로 "사전"이 추가됩니다.

이력서 = {
    출신: "미시시피"
    부모님: "완전 부자"
}

이력서['출신'] + " 츨신이에요" 보여주기
이력서['부모님'] + " 부모님이에요" 보여주기
이력서['나이'] = 20

가져올_값 = '이름'
이력서[가져올_값] = "병서"
"이름은 " + 이력서[가져올_값] + "에요" 보여주기

"# 이력서" 보여주기

이력서 의 항목_이름 마다 반복
    항목_이름 + ": " + 이력서[항목_이름] 보여주기

[gemini-code-assist]

Summary of Changes

Hello @rycont, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new fundamental data type, "사전" (Dictionary), enabling the storage and manipulation of key-value pairs. Alongside this, it significantly extends the language's assignment capabilities by implementing compound assignment operators (e.g., +=, -=) for both variables and elements within indexed collections like lists and the newly added dictionaries. These changes enhance the expressiveness and power of the language, providing more versatile data structuring and manipulation options.

Highlights

• New Dictionary Type (사전): Implemented a new "사전" (Dictionary) data type, allowing users to store and retrieve values using named keys. This includes support for creating dictionary literals, accessing values by key (e.g., dict['key']), and modifying existing entries.
• Compound Assignment Operators: Added support for compound assignment operators (+=, -=, *=, /=, %=) for both variables and elements within indexed types (lists and dictionaries). This allows for more concise code when performing an operation and reassigning the result.
• Enhanced Indexed Value Handling: The core IndexedValue class has been updated to support dictionary-like behavior, including a new toPrint() method for formatted output and an enumerate() method to facilitate iteration over dictionary keys.
• Generalized Loop Iteration: The ListLoop construct has been generalized to iterate over any IndexedValue (including dictionaries, where it iterates over keys), rather than being limited to lists.
• Refined Error Reporting: The IndexOutOfRangeError has been renamed to IndexKeyNotFoundError and its error messages improved to provide clearer context, including the type of index used.
• Updated Documentation: Comprehensive documentation has been added for the new dictionary type, along with examples for compound assignment operators, making it easier for users to learn and utilize these new features.

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[gemini-code-assist]

Code Review

This pull request introduces a new dictionary (사전) data type to the language, a significant and well-implemented feature. The changes span the entire compiler toolchain, from tokenizing and parsing to execution and error handling. The implementation includes compound assignment operators (+=, -=, etc.) for both variables and indexed values (lists/dicts), which is a great enhancement. The PR also comes with comprehensive tests and documentation.

My review focuses on a few areas for improvement:

• Refactoring duplicated code for handling compound assignments to improve maintainability.
• Fixing a minor grammatical issue in the new documentation.
• Improving consistency in a new test file.

Overall, this is a high-quality contribution.