Module ParseTypeScript 

ParseTypeScript

File: Indexing/Language/ParseTypeScript.rs

Role in Air Architecture

Provides TypeScript/JavaScript-specific symbol extraction functionality for the File Indexer service, identifying TS/JS language constructs like classes, interfaces, functions, constants, and types.

Primary Responsibility

Extract TypeScript/JavaScript code symbols from source files for VSCode Outline View and Go to Symbol features.

Secondary Responsibilities

• Extract class definitions
• Extract interface definitions
• Extract function declarations
• Extract arrow functions
• Extract variable declarations (const, let, var)
• Extract type definitions
• Extract enum definitions

Dependencies

External Crates:

• None (uses std library)

Internal Modules:

• crate::Result - Error handling type
• super::super::SymbolInfo - Symbol structure definitions

Dependents

• Indexing::Process::ExtractSymbols - Language routing

VSCode Pattern Reference

Inspired by VSCode’s TypeScript symbol extraction in src/vs/workbench/services/search/common/

Security Considerations

• Line-by-line parsing without eval
• No code execution during extraction
• Safe string handling

Performance Considerations

• Efficient line-based parsing
• Minimal allocations per file
• Early termination for non-TS/JS files

Error Handling Strategy

Symbol extraction returns empty vectors on parse errors rather than failures, allowing indexing to continue for other files.

Thread Safety

Symbol extraction functions are pure and safe to call from parallel indexing tasks.

Functions

ExtractExportModifier

Extract TypeScript/JavaScript export modifier if present

ExtractGenericParameters

Parse TypeScript/JavaScript generic parameters

ExtractTypeAnnotation

Extract TypeScript/JavaScript type annotation from a declaration

ExtractTypeScriptSymbols

Extract TypeScript/JavaScript symbols (class, interface, function, etc.)

IsTypeScriptClass

Check if a line contains a TypeScript/JavaScript class definition

IsTypeScriptFunction

Check if a line contains a TypeScript/JavaScript function definition

IsTypeScriptInterface

Check if a line contains a TypeScript/JavaScript interface definition