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 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 2x 2x 2x 2x 1x 2x 2x 12x 12x 12x 12x 12x 12x 12x 12x 2x 2x 5x 5x 5x 4x 4x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 4x 4x 4x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1x 2x 2x 1x 1x 1x 2x 2x 2x 2x 2x 2x 3x 3x 2x 2x 29x 29x 2x 2x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 2x 46x 46x | /** @import { Context, Visitors } from 'zimmerframe' */
/** @import { FunctionExpression, FunctionDeclaration } from 'estree' */
import { walk } from 'zimmerframe';
import * as b from '../../utils/builders.js';
import * as e from '../../errors.js';
/**
* @param {FunctionExpression | FunctionDeclaration} node
* @param {Context<any, any>} context
*/
function remove_this_param(node, context) {
if (node.params[0]?.type === 'Identifier' && node.params[0].name === 'this') {
node.params.shift();
}
return context.next();
}
/** @type {Visitors<any, null>} */
const visitors = {
Decorator(node) {
e.typescript_invalid_feature(node, 'decorators (related TSC proposal is not stage 4 yet)');
},
ImportDeclaration(node) {
if (node.importKind === 'type') return b.empty;
if (node.specifiers?.length > 0) {
const specifiers = node.specifiers.filter((/** @type {any} */ s) => s.importKind !== 'type');
if (specifiers.length === 0) return b.empty;
return { ...node, specifiers };
}
return node;
},
ExportNamedDeclaration(node, context) {
if (node.exportKind === 'type') return b.empty;
if (node.declaration) {
return context.next();
}
if (node.specifiers) {
const specifiers = node.specifiers.filter((/** @type {any} */ s) => s.exportKind !== 'type');
if (specifiers.length === 0) return b.empty;
return { ...node, specifiers };
}
return node;
},
ExportDefaultDeclaration(node) {
if (node.exportKind === 'type') return b.empty;
return node;
},
ExportAllDeclaration(node) {
if (node.exportKind === 'type') return b.empty;
return node;
},
PropertyDefinition(node) {
if (node.accessor) {
e.typescript_invalid_feature(
node,
'accessor fields (related TSC proposal is not stage 4 yet)'
);
}
},
TSAsExpression(node, context) {
return context.visit(node.expression);
},
TSSatisfiesExpression(node, context) {
return context.visit(node.expression);
},
TSNonNullExpression(node, context) {
return context.visit(node.expression);
},
TSTypeAnnotation() {
// This isn't correct, strictly speaking, and could result in invalid ASTs (like an empty statement within function parameters),
// but esrap, our printing tool, just ignores these AST nodes at invalid positions, so it's fine
return b.empty;
},
TSInterfaceDeclaration() {
return b.empty;
},
TSTypeAliasDeclaration() {
return b.empty;
},
TSTypeParameterDeclaration() {
return b.empty;
},
TSTypeParameterInstantiation() {
return b.empty;
},
TSEnumDeclaration(node) {
e.typescript_invalid_feature(node, 'enums');
},
TSParameterProperty(node, context) {
if (node.accessibility && context.path.at(-2)?.kind === 'constructor') {
e.typescript_invalid_feature(node, 'accessibility modifiers on constructor parameters');
}
return node.parameter;
},
FunctionExpression: remove_this_param,
FunctionDeclaration: remove_this_param,
TSDeclareFunction() {
return b.empty;
},
ClassDeclaration(node, context) {
if (node.declare) {
return b.empty;
}
return context.next();
},
VariableDeclaration(node, context) {
if (node.declare) {
return b.empty;
}
return context.next();
},
TSModuleDeclaration(node, context) {
if (!node.body) return b.empty;
// namespaces can contain non-type nodes
const cleaned = /** @type {any[]} */ (node.body.body).map((entry) => context.visit(entry));
if (cleaned.some((entry) => entry !== b.empty)) {
e.typescript_invalid_feature(node, 'namespaces with non-type nodes');
}
return b.empty;
}
};
/**
* @template T
* @param {T} ast
* @returns {T}
*/
export function remove_typescript_nodes(ast) {
return walk(ast, null, visitors);
}
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