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// This file is a source for playground examples.
// Examples integrity is smoke-checked with examples.spec.js
function parse_defaults(source, parse, stringify, transforms) {
// Invoking parser with default config covers the most genearic cases.
// Note how /*** and /* blocks are ignored
/** One-liner */
/** @some-tag {someType} someName */
/**
* Description may go
* over multiple lines followed by @tags
* @param {string} name the name parameter
* @param {any} value the value parameter
*/
/*** ignored */
/* ignored */
const parsed = parse(source);
const stringified = parsed.map((block) => stringify(block));
}
function parse_line_numbering(source, parse, stringify, transforms) {
// Note, line numbers are off by 5 from what you see in editor
//
// Try changeing start line back to 0, or omit the option
// parse(source, {startLine: 0}) -- default
// parse(source, {startLine: 5}) -- enforce alternative start number
/**
* Description may go
* over multiple lines followed by @tags
* @param {string} name the name parameter
* @param {any} value the value parameter
*/
const parsed = parse(source, { startLine: 5 });
const stringified = parsed[0].tags
.map((tag) => `line ${tag.source[0].number + 1} : @${tag.tag} ${tag.name}`)
.join('\n');
}
function parse_spacing(source, parse, stringify, transforms) {
// Note, when spacing option is set to 'compact' or omited, tag and block descriptions are collapsed to look like a single sentense.
//
// Try changeing it to 'preserve' or defining custom function
// parse(source, {spacing: 'compact'}) -- default
// parse(source, {spacing: 'preserve'}) -- preserve spaces and line breaks
// parse(source, {spacing: lines => lines
// .map(tokens => tokens.description.trim())
// .filter(description => description !== '')
// .join(' ');
// }) -- mimic 'compact' implementation
/**
* Description may go
* over multiple lines followed by
* @param {string} name the name parameter
* with multiline description
* @param {function(
* number,
* string
* )} options the options
*/
const parsed = parse(source, { spacing: 'preserve' });
const stringified = parsed[0].tags
.map((tag) => `@${tag.tag} - ${tag.description}\n\n${tag.type}`)
.join('\n----\n');
}
function parse_escaping(source, parse, stringify, transforms) {
// Note, @decorator is not parsed as another tag because block is wrapped into ###.
//
// Try setting alternative escape sequence
// parse(source, {fence: '```'}) -- default
// parse(source, {fence: '###'}) -- update source correspondingly
/**
* @example "some code"
###
@decorator
function hello() {
// do something
}
###
*/
const parsed = parse(source, { fence: '###' });
const stringified = parsed[0].tags
.map((tag) => `@${tag.tag} - ${tag.description}`)
.join('\n');
}
function stringify_formatting(source, parse, stringify, transforms) {
// stringify preserves exact formatting by default, but you can transform parsing result first
// transform = align() -- align name, type, and description
// transform = flow(align(), indent(4)) -- align, then place the block's opening marker at pos 4
/**
* Description may go
* over multiple lines followed by @tags
* @param {string} name the name parameter
* @param {any} value the value parameter
*/
const { flow, align, indent } = transforms;
const transform = flow(align(), indent(4));
const parsed = parse(source);
const stringified = stringify(transform(parsed[0]));
}
function parse_source_exploration(source, parse, stringify, transforms) {
// parse() produces Block[].source keeping accurate track of origin source
/**
* Description may go
* over multiple lines followed by @tags
* @param {string} name the name parameter
* @param {any} value the value parameter
*/
const parsed = parse(source);
const summary = ({ source }) => ({
source: source
.map(
({ tokens }) =>
tokens.start +
tokens.delimiter +
tokens.postDelimiter +
tokens.tag +
tokens.postTag +
tokens.type +
tokens.postType +
tokens.name +
tokens.postName +
tokens.description +
tokens.end
)
.join('\n'),
start: {
line: source[0].number + 1,
column: source[0].tokens.start.length,
},
end: {
line: source[source.length - 1].number + 1,
column: source[source.length - 1].source.length,
},
});
const pos = (p) => p.line + ':' + p.column;
const stringified = parsed[0].tags
.map(summary)
.map((s) => `${pos(s.start)} - ${pos(s.end)}\n${s.source}`);
}
function parse_advanced_parsing(source, parse, _, _, tokenizers) {
// Each '@tag ...' section results into a Spec. The Spec is computed by
// the chain of tokenizers each contributing a change to the the Spec.* and the Spec.tags[].tokens.
// Default parse() options come with stadart tokenizers:
// {
// ...,
// spacing = 'compact',
// tokenizers = [
// tokenizers.tag(),
// tokenizers.type(spacing),
// tokenizers.name(),
// tokenizers.description(spacing),
// ]
// }
// You can reorder those, or even replace any with a custom function (spec: Spec) => Spec
// This example allows to parse "@tag description" comments
/**
* @arg0 my parameter
* @arg1
* another parameter
* with a strange formatting
*/
const parsed = parse(source, {
tokenizers: [tokenizers.tag(), tokenizers.description('preserve')],
});
const stringified = parsed[0].tags
.map((tag) => `@${tag.tag} - ${tag.description}`)
.join('\n');
}
function stringify_rename(source, parse, stringify, transforms) {
// You can do any manipulations with the parsed result
// See how each block is being mapped. If you are updating a Block.source
// then rewireSource(block) should be called on each changed block.
// If changes were made to Block.tags[].source then call rewireSpecs(block).
// This example shows how you can "rename" @param tags: value1 -> value11, value2 -> value22
/**
* Description may go
* over multiple lines followed by @tags
* @param {string} name the name parameter
* @param {any} value1 first value parameter
* with a multipline description
* @param {any} value2 second value parameter
*/
function renameParam(from, to) {
return (block) => {
for (const tag of block.tags) {
if (tag.tag === 'param' && tag.name === from) {
tag.name = to;
for (const line of tag.source) {
if (line.tokens.name === from) line.tokens.name = to;
}
}
}
return block;
};
}
const transform = transforms.flow(
renameParam('value1', 'value11'),
renameParam('value2', 'value22'),
stringify
);
const parsed = parse(source);
const stringified = parsed.map(transform);
}
(typeof window === 'undefined' ? module.exports : window).examples = [
parse_defaults,
parse_line_numbering,
parse_escaping,
parse_spacing,
parse_source_exploration,
parse_advanced_parsing,
stringify_formatting,
stringify_rename,
];