Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 4416x 2x 2x 2x 2x 2x 2x 2x 2x 12478x 12478x 12478x 12478x 12478x 12478x 12478x 12478x 12478x 12478x 12478x 12473x 12473x 12473x 12473x 2x 2x 2x 2x 2x 2x 2x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 16894x 275x 4x 4x 4x 4x 4x 4x 4x 4x 4x 275x 275x 16894x 16894x 16894x 16894x 16889x 142x 142x 142x 4767x 4767x 4767x 208x 208x 208x 4767x 4767x 4767x 4767x 2791x 2791x 2791x 2010x 2010x 2010x 2010x 1915x 2010x 1904x 2010x 2010x 2010x 141x 141x 141x 141x 141x 150x 150x 28x 28x 28x 28x 28x 2010x 35x 35x 2010x 2791x 4767x 142x 142x 142x 142x 16889x 4x 4x 16889x 16894x 16894x 2x 2x 2x 2x 2x 2x 286x 286x 286x 1999x 1999x 1999x 1999x 1999x 1999x 24x 24x 24x 24x 24x 24x 24x 24x 1999x 1999x 1999x 151x 1999x 37x 37x 37x 37x 37x 37x 1999x 1999x 1999x 286x 286x | /** @import { Comment, Program } from 'estree' */
/** @import { Node } from 'acorn' */
import * as acorn from 'acorn';
import { walk } from 'zimmerframe';
import { tsPlugin } from 'acorn-typescript';
import { locator } from '../../state.js';
const ParserWithTS = acorn.Parser.extend(tsPlugin({ allowSatisfies: true }));
/**
* @param {string} source
* @param {boolean} typescript
*/
export function parse(source, typescript) {
const parser = typescript ? ParserWithTS : acorn.Parser;
const { onComment, add_comments } = get_comment_handlers(source);
const ast = parser.parse(source, {
onComment,
sourceType: 'module',
ecmaVersion: 13,
locations: true
});
if (typescript) amend(source, ast);
add_comments(ast);
return /** @type {Program} */ (ast);
}
/**
* @param {string} source
* @param {boolean} typescript
* @param {number} index
* @returns {acorn.Expression & { leadingComments?: CommentWithLocation[]; trailingComments?: CommentWithLocation[]; }}
*/
export function parse_expression_at(source, typescript, index) {
const parser = typescript ? ParserWithTS : acorn.Parser;
const { onComment, add_comments } = get_comment_handlers(source);
const ast = parser.parseExpressionAt(source, index, {
onComment,
sourceType: 'module',
ecmaVersion: 13,
locations: true
});
if (typescript) amend(source, ast);
add_comments(ast);
return ast;
}
/**
* Acorn doesn't add comments to the AST by itself. This factory returns the capabilities
* to add them after the fact. They are needed in order to support `svelte-ignore` comments
* in JS code and so that `prettier-plugin-svelte` doesn't remove all comments when formatting.
* @param {string} source
*/
function get_comment_handlers(source) {
/**
* @typedef {Comment & {
* start: number;
* end: number;
* }} CommentWithLocation
*/
/** @type {CommentWithLocation[]} */
const comments = [];
return {
/**
* @param {boolean} block
* @param {string} value
* @param {number} start
* @param {number} end
*/
onComment: (block, value, start, end) => {
if (block && /\n/.test(value)) {
let a = start;
while (a > 0 && source[a - 1] !== '\n') a -= 1;
let b = a;
while (/[ \t]/.test(source[b])) b += 1;
const indentation = source.slice(a, b);
value = value.replace(new RegExp(`^${indentation}`, 'gm'), '');
}
comments.push({ type: block ? 'Block' : 'Line', value, start, end });
},
/** @param {acorn.Node & { leadingComments?: CommentWithLocation[]; trailingComments?: CommentWithLocation[]; }} ast */
add_comments(ast) {
if (comments.length === 0) return;
walk(ast, null, {
_(node, { next, path }) {
let comment;
while (comments[0] && comments[0].start < node.start) {
comment = /** @type {CommentWithLocation} */ (comments.shift());
(node.leadingComments ||= []).push(comment);
}
next();
if (comments[0]) {
const parent = /** @type {any} */ (path.at(-1));
if (parent === undefined || node.end !== parent.end) {
const slice = source.slice(node.end, comments[0].start);
const is_last_in_body =
((parent?.type === 'BlockStatement' || parent?.type === 'Program') &&
parent.body.indexOf(node) === parent.body.length - 1) ||
(parent?.type === 'ArrayExpression' &&
parent.elements.indexOf(node) === parent.elements.length - 1) ||
(parent?.type === 'ObjectExpression' &&
parent.properties.indexOf(node) === parent.properties.length - 1);
if (is_last_in_body) {
// Special case: There can be multiple trailing comments after the last node in a block,
// and they can be separated by newlines
let end = node.end;
while (comments.length) {
const comment = comments[0];
if (parent && comment.start >= parent.end) break;
(node.trailingComments ||= []).push(comment);
comments.shift();
end = comment.end;
}
} else if (node.end <= comments[0].start && /^[,) \t]*$/.test(slice)) {
node.trailingComments = [/** @type {CommentWithLocation} */ (comments.shift())];
}
}
}
}
});
// Special case: Trailing comments after the root node (which can only happen for expression tags or for Program nodes).
// Adding them ensures that we can later detect the end of the expression tag correctly.
if (comments.length > 0 && (comments[0].start >= ast.end || ast.type === 'Program')) {
(ast.trailingComments ||= []).push(...comments.splice(0));
}
}
};
}
/**
* Tidy up some stuff left behind by acorn-typescript
* @param {string} source
* @param {Node} node
*/
function amend(source, node) {
return walk(node, null, {
_(node, context) {
// @ts-expect-error
delete node.loc.start.index;
// @ts-expect-error
delete node.loc.end.index;
if (typeof node.loc?.end === 'number') {
const loc = locator(node.loc.end);
if (loc) {
node.loc.end = {
line: loc.line,
column: loc.column
};
}
}
if (
/** @type {any} */ (node).typeAnnotation &&
(node.end === undefined || node.end < node.start)
) {
// i think there might be a bug in acorn-typescript that prevents
// `end` from being assigned when there's a type annotation
let end = /** @type {any} */ (node).typeAnnotation.start;
while (/\s/.test(source[end - 1])) end -= 1;
node.end = end;
}
context.next();
}
});
}
|