forked from babel/babel
/
typescript.js
194 lines (159 loc) · 4.75 KB
/
typescript.js
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
190
191
192
193
194
"use strict";
const t = require("../../packages/babel-types");
const utils = require("./utils");
let code = `// NOTE: This file is autogenerated. Do not modify.
// See scripts/generators/typescript.js for script used.
interface BaseComment {
value: string;
start: number;
end: number;
loc: SourceLocation;
type: "CommentBlock" | "CommentLine";
}
export interface CommentBlock extends BaseComment {
type: "CommentBlock";
}
export interface CommentLine extends BaseComment {
type: "CommentLine";
}
export type Comment = CommentBlock | CommentLine;
export interface SourceLocation {
start: {
line: number;
column: number;
};
end: {
line: number;
column: number;
};
}
interface BaseNode {
leadingComments: ReadonlyArray<Comment> | null;
innerComments: ReadonlyArray<Comment> | null;
trailingComments: ReadonlyArray<Comment> | null;
start: number | null;
end: number | null;
loc: SourceLocation | null;
type: Node["type"];
}
export type Node = ${t.TYPES.sort().join(" | ")};\n\n`;
//
const lines = [];
for (const type in t.NODE_FIELDS) {
const fields = t.NODE_FIELDS[type];
const fieldNames = sortFieldNames(Object.keys(t.NODE_FIELDS[type]), type);
const struct = ['type: "' + type + '";'];
const args = [];
fieldNames.forEach(fieldName => {
const field = fields[fieldName];
let typeAnnotation = utils.stringifyValidator(field.validate, "");
if (isNullable(field) && !hasDefault(field)) {
typeAnnotation += " | null";
}
if (areAllRemainingFieldsNullable(fieldName, fieldNames, fields)) {
args.push(
`${t.toBindingIdentifierName(fieldName)}${
isNullable(field) ? "?:" : ":"
} ${typeAnnotation}`
);
} else {
args.push(
`${t.toBindingIdentifierName(fieldName)}: ${typeAnnotation}${
isNullable(field) ? " | undefined" : ""
}`
);
}
const alphaNumeric = /^\w+$/;
if (t.isValidIdentifier(fieldName) || alphaNumeric.test(fieldName)) {
struct.push(`${fieldName}: ${typeAnnotation};`);
} else {
struct.push(`"${fieldName}": ${typeAnnotation};`);
}
});
code += `export interface ${type} extends BaseNode {
${struct.join("\n ").trim()}
}\n\n`;
// super and import are reserved words in JavaScript
if (type !== "Super" && type !== "Import") {
lines.push(
`export function ${utils.toFunctionName(type)}(${args.join(
", "
)}): ${type};`
);
}
}
for (let i = 0; i < t.TYPES.length; i++) {
let decl = `export function is${
t.TYPES[i]
}(node: object, opts?: object | null): `;
if (t.NODE_FIELDS[t.TYPES[i]]) {
decl += `node is ${t.TYPES[i]};`;
} else if (t.FLIPPED_ALIAS_KEYS[t.TYPES[i]]) {
decl += `node is ${t.TYPES[i]};`;
} else {
decl += `boolean;`;
}
lines.push(decl);
}
lines.push(
`export function validate(n: Node, key: string, value: any): void;`,
`export function clone<T extends Node>(n: T): T;`,
`export function cloneDeep<T extends Node>(n: T): T;`,
`export function removeProperties(
n: Node,
opts?: { preserveComments: boolean } | null
): void;`,
`export function removePropertiesDeep<T extends Node>(
n: T,
opts?: { preserveComments: boolean } | null
): T;`,
`export type TraversalAncestors = ReadonlyArray<{
node: Node,
key: string,
index?: number,
}>;
export type TraversalHandler<T> = (node: Node, parent: TraversalAncestors, type: T) => void;
export type TraversalHandlers<T> = {
enter?: TraversalHandler<T>,
exit?: TraversalHandler<T>,
};`.replace(/(^|\n) {2}/g, "$1"),
// eslint-disable-next-line
`export function traverse<T>(n: Node, h: TraversalHandler<T> | TraversalHandlers<T>, state?: T): void;`
);
for (const type in t.DEPRECATED_KEYS) {
code += `/**
* @deprecated Use \`${t.DEPRECATED_KEYS[type]}\`
*/
export type ${type} = ${t.DEPRECATED_KEYS[type]};\n
`;
}
for (const type in t.FLIPPED_ALIAS_KEYS) {
const types = t.FLIPPED_ALIAS_KEYS[type];
code += `export type ${type} = ${types
.map(type => `${type}`)
.join(" | ")};\n`;
}
code += lines.join("\n") + "\n";
//
process.stdout.write(code);
//
function areAllRemainingFieldsNullable(fieldName, fieldNames, fields) {
const index = fieldNames.indexOf(fieldName);
return fieldNames.slice(index).every(_ => isNullable(fields[_]));
}
function hasDefault(field) {
return field.default != null;
}
function isNullable(field) {
return field.optional || hasDefault(field);
}
function sortFieldNames(fields, type) {
return fields.sort((fieldA, fieldB) => {
const indexA = t.BUILDER_KEYS[type].indexOf(fieldA);
const indexB = t.BUILDER_KEYS[type].indexOf(fieldB);
if (indexA === indexB) return fieldA < fieldB ? -1 : 1;
if (indexA === -1) return 1;
if (indexB === -1) return -1;
return indexA - indexB;
});
}