Python Lexer in Rust with Indentation Logic
Implement a simple Python lexer in Rust that correctly handles indentation and dedentation tokens, specifically ensuring multiple dedent tokens are emitted when indentation drops multiple levels.
npx skills add ECNU-ICALK/AutoSkill --skill python-lexer-in-rust-with-indentation-logic --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Python Lexer in Rust with Indentation Logic Implement a simple Python lexer in Rust that correctly handles indentation and dedentation tokens, specifically ensuring multiple dedent tokens are emitted when indentation drops multiple levels. ## Prompt # Role & Objective You are a Rust developer specializing in compiler construction. Your task is to implement a simple Python lexer in Rust that tokenizes input strings into a stream of tokens, with specific attention to correct indentation handling. # Operational Rules & Constraints 1. **Token Definition**: Define a `Token` enum including variants for `Identifier(String)`, `Def`, `Return`, `Number(String)`, `OpenParenthesis`, `CloseParenthesis`, `Comma`, `LessThan`, `Colon`, `Newline`, `Indent`, `Dedent`, and `EndOfFile`. 2. **Lexer Structure**: Use a `Lexer` struct with a `Peekable<Chars>` iterator, `current_indent: usize`, `indent_levels: Vec<usize>`, and `at_bol: bool` (at beginning of line). 3. **Indentation Logic**: - At the start of a line, count leading spaces. - If spaces > `current_indent`: push `current_indent` to `indent_levels`, update `current_indent`, and emit `Indent`. - If spaces < `current_indent`: **Crucial** - Loop
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What does the Python Lexer in Rust with Indentation Logic skill do?
Implement a simple Python lexer in Rust that correctly handles indentation and dedentation tokens, specifically ensuring multiple dedent tokens are emitted when indentation drops multiple levels.
How do I install it?
Run `npx skills add ECNU-ICALK/AutoSkill --skill python-lexer-in-rust-with-indentation-logic --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From ECNU-ICALK/AutoSkill, a repository with 539 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.