Initial import with skill sheet working
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node_modules/comment-parser/README.md
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# comment-parser
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`comment-parser` is a library helping to handle Generic JSDoc-style comments. It is
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- **language-agnostic** – no semantics enforced. You decide what tags are and what they mean. And it can be used with any language supporting `/** */` source comments.
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- **no dependencies** – it is compact and environment-agnostic, can be run on both the server and browser sides
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- **highly customizable** – with a little code you can deeply customize how comments are parsed
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- **bidirectional** - you can write comment blocks back to the source after updating or formatting
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- **strictly typed** - comes with generated `d.ts` data definitions since written in TypeScript
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```sh
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npm install comment-parser
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```
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> 💡 Check out the [Playground](https://syavorsky.github.io/comment-parser)
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> 💡 Previous version lives in [0.x](https://github.com/syavorsky/comment-parser/tree/0.x) branch
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Lib mainly provides two pieces [Parser](#Parser) and [Stringifier](#Stringifier).
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## Parser
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Let's go over string parsing:
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```js
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const { parse } = require('comment-parser/lib')
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const source = `
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/**
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* Description may go
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* over few lines followed by @tags
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* @param {string} name the name parameter
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* @param {any} value the value of any type
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*/`
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const parsed = parse(source)
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```
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Lib source code is written in TypeScript and all data shapes are conveniently available for your IDE of choice. All types described below can be found in [primitives.ts](src/primitives.ts)
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The input source is first parsed into lines, then lines split into tokens, and finally, tokens are processed into blocks of tags
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### Block
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```js
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/**
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* Description may go
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* over multiple lines followed by @tags
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* @param {string} name the name parameter
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* @param {any} value the value parameter
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*/
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```
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### Description
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```js
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/**
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* Description may go
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* over multiple lines followed by @tags
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```
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### Tags
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```js
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* @param {string} name the name parameter
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```
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```js
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* @param {any} value the value parameter
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*/
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```
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### Tokens
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```
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|line|start|delimiter|postDelimiter|tag |postTag|name |postName|type |postType|description |end|
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|----|-----|---------|-------------|------|-------|-----|--------|--------|--------|--------------------------------|---|
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| 0|{2} |/** | | | | | | | | | |
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| 1|{3} |* |{1} | | | | | | |Description may go | |
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| 2|{3} |* |{1} | | | | | | |over few lines followed by @tags| |
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| 3|{3} |* |{1} |@param|{1} |name |{1} |{string}|{1} |the name parameter | |
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| 4|{3} |* |{1} |@param|{1} |value|{1} |{any} |{1} |the value of any type | |
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| 5|{3} | | | | | | | | | |*/ |
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```
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### Result
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The result is an array of Block objects, see the full output on the [playground](https://syavorsky.github.io/comment-parser)
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```js
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[{
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// uppper text of the comment, overall block description
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description: 'Description may go over multiple lines followed by @tags',
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// list of block tags: @param, @param
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tags: [{
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// tokens.tag without "@"
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tag: 'param',
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// unwrapped tokens.name
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name: 'name',
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// unwrapped tokens.type
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type: 'string',
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// true, if tokens.name is [optional]
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optional: false,
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// default value if optional [name=default] has one
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default: undefined,
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// tokens.description assembled from a siongle or multiple lines
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description: 'the name parameter',
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// problems occured while parsing this tag section, subset of ../problems array
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problems: [],
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// source lines processed for extracting this tag, "slice" of the ../source item reference
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source: [ ... ],
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}, ... ],
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// source is an array of `Line` items having the source
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// line number and `Tokens` that can be assembled back into
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// the line string preserving original formatting
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source: [{
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// source line number
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number: 1,
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// source line string
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source: "/**",
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// source line tokens
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tokens: {
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// indentation
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start: "",
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// delimiter, either '/**', '*/', '*', or ''. Mid lines may have no delimiters
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delimiter: "/**",
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// space between delimiter and tag
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postDelimiter: "",
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// tag starting with "@"
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tag: "",
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// space between tag and type
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postTag: "",
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// name with no whitespaces or "multiple words" wrapped into quotes. May occure in [name] and [name=default] forms
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name: "",
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// space between name and type
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postName: "",
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// type is has to be {wrapped} into curlies otherwise will be omitted
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type: "",
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// space between type and description
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postType: "",
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// description is basicaly rest of the line
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description: "",
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// closing */ marker if present
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end: ""
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}
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}, ... ],
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// problems occured while parsing the block
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problems: [],
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}];
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```
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While `.source[].tokens` are not providing readable annotation information, they are essential for tracing data origins and assembling string blocks with `stringify`
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### options
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```ts
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interface Options {
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// start count for source line numbers
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startLine: number;
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// escaping chars sequence marking wrapped content literal for the parser
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fence: string;
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// block and comment description compaction strategy
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spacing: 'compact' | 'preserve';
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// tokenizer functions extracting name, type, and description out of tag, see Tokenizer
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tokenizers: Tokenizer[];
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}
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```
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examples
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- [default config](https://syavorsky.github.io/comment-parser/#parse-defaults)
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- [line numbers control](https://syavorsky.github.io/comment-parser/#parse-line-numbering)
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- [description spacing](https://syavorsky.github.io/comment-parser/#parse-spacing)
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- [escaping](https://syavorsky.github.io/comment-parser/#parse-escaping)
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- [explore the origin source](https://syavorsky.github.io/comment-parser/#parse-source-exploration)
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[suggest more examples](https://github.com/syavorsky/comment-parser/issues/new?title=example+suggestion%3A+...&labels=example,parser)
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## Stringifier
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The stringifier is an important piece used by other tools updating the source code. It goes over `Block.source[].tokens` items and assembles them back to the string. It might be used with various transforms applied before stringifying.
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```js
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const { parse, stringify, transforms: {flow, align, indent} } = require('comment-parser');
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const source = `
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/**
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* Description may go
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* over multiple lines followed by @tags
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*
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* @my-tag {my.type} my-name description line 1
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description line 2
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* description line 3
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*/`;
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const parsed = parse(source);
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const transform = flow(align(), indent(0))
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console.log(stringify(transform(parsed[0])));
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```
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### Result
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```js
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/**
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* Description may go
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* over multiple lines followed by @tags
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*
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* @my-tag {my.type} my-name description line 1
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description line 2
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* description line 3
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*/
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```
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examples
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- [format comments](https://syavorsky.github.io/comment-parser/#stringify-formatting)
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[suggest more examples](https://github.com/syavorsky/comment-parser/issues/new?title=example+suggestion%3A+...&labels=example,stringifier)
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## Migrating from 0.x version
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Code of pre-1.0 version is forked into [0.x](https://github.com/syavorsky/comment-parser/tree/0.x) and will phase out eventually. Please file the issue if you find some previously existing functionality can't be achieved with 1.x API. Check out [migration notes](migrate-1.0.md).
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