mirror of
https://github.com/denoland/std.git
synced 2024-11-22 04:59:05 +00:00
806 lines
20 KiB
TypeScript
806 lines
20 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
|
|
// This module is browser compatible.
|
|
|
|
import { deepMerge } from "@std/collections/deep-merge";
|
|
|
|
// ---------------------------
|
|
// Interfaces and base classes
|
|
// ---------------------------
|
|
|
|
interface Success<T> {
|
|
ok: true;
|
|
body: T;
|
|
}
|
|
interface Failure {
|
|
ok: false;
|
|
}
|
|
type ParseResult<T> = Success<T> | Failure;
|
|
|
|
type ParserComponent<T = unknown> = (scanner: Scanner) => ParseResult<T>;
|
|
|
|
type BlockParseResultBody = {
|
|
type: "Block";
|
|
value: Record<string, unknown>;
|
|
} | {
|
|
type: "Table";
|
|
key: string[];
|
|
value: Record<string, unknown>;
|
|
} | {
|
|
type: "TableArray";
|
|
key: string[];
|
|
value: Record<string, unknown>;
|
|
};
|
|
|
|
export class Scanner {
|
|
#whitespace = /[ \t]/;
|
|
#position = 0;
|
|
#source: string;
|
|
|
|
constructor(source: string) {
|
|
this.#source = source;
|
|
}
|
|
|
|
/**
|
|
* Get current character
|
|
* @param index - relative index from current position
|
|
*/
|
|
char(index = 0) {
|
|
return this.#source[this.#position + index] ?? "";
|
|
}
|
|
|
|
/**
|
|
* Get sliced string
|
|
* @param start - start position relative from current position
|
|
* @param end - end position relative from current position
|
|
*/
|
|
slice(start: number, end: number): string {
|
|
return this.#source.slice(this.#position + start, this.#position + end);
|
|
}
|
|
|
|
/**
|
|
* Move position to next
|
|
*/
|
|
next(count?: number) {
|
|
if (typeof count === "number") {
|
|
for (let i = 0; i < count; i++) {
|
|
this.#position++;
|
|
}
|
|
} else {
|
|
this.#position++;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Move position until current char is not a whitespace, EOL, or comment.
|
|
* @param options.inline - skip only whitespaces
|
|
*/
|
|
nextUntilChar(
|
|
options: { inline?: boolean; comment?: boolean } = { comment: true },
|
|
) {
|
|
if (options.inline) {
|
|
while (this.#whitespace.test(this.char()) && !this.eof()) {
|
|
this.next();
|
|
}
|
|
} else {
|
|
while (!this.eof()) {
|
|
const char = this.char();
|
|
if (this.#whitespace.test(char) || this.isCurrentCharEOL()) {
|
|
this.next();
|
|
} else if (options.comment && this.char() === "#") {
|
|
// entering comment
|
|
while (!this.isCurrentCharEOL() && !this.eof()) {
|
|
this.next();
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// Invalid if current char is other kinds of whitespace
|
|
if (!this.isCurrentCharEOL() && /\s/.test(this.char())) {
|
|
const escaped = "\\u" + this.char().charCodeAt(0).toString(16);
|
|
const position = this.#position;
|
|
throw new SyntaxError(
|
|
`Cannot parse the TOML: It contains invalid whitespace at position '${position}': \`${escaped}\``,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Position reached EOF or not
|
|
*/
|
|
eof() {
|
|
return this.position() >= this.#source.length;
|
|
}
|
|
|
|
/**
|
|
* Get current position
|
|
*/
|
|
position() {
|
|
return this.#position;
|
|
}
|
|
|
|
isCurrentCharEOL() {
|
|
return this.char() === "\n" || this.slice(0, 2) === "\r\n";
|
|
}
|
|
}
|
|
|
|
// -----------------------
|
|
// Utilities
|
|
// -----------------------
|
|
|
|
function success<T>(body: T): Success<T> {
|
|
return { ok: true, body };
|
|
}
|
|
function failure(): Failure {
|
|
return { ok: false };
|
|
}
|
|
|
|
export function unflat(
|
|
keys: string[],
|
|
values: unknown = {},
|
|
cObj?: unknown,
|
|
): Record<string, unknown> {
|
|
const out: Record<string, unknown> = {};
|
|
if (keys.length === 0) {
|
|
return cObj as Record<string, unknown>;
|
|
}
|
|
if (!cObj) cObj = values;
|
|
const key: string | undefined = keys[keys.length - 1];
|
|
if (typeof key === "string") out[key] = cObj;
|
|
return unflat(keys.slice(0, -1), values, out);
|
|
}
|
|
export function deepAssignWithTable(target: Record<string, unknown>, table: {
|
|
type: "Table" | "TableArray";
|
|
key: string[];
|
|
value: Record<string, unknown>;
|
|
}) {
|
|
if (table.key.length === 0 || table.key[0] == null) {
|
|
throw new Error(
|
|
"Cannot parse the TOML: key length is not a positive number",
|
|
);
|
|
}
|
|
const value = target[table.key[0]];
|
|
|
|
if (typeof value === "undefined") {
|
|
Object.assign(
|
|
target,
|
|
unflat(
|
|
table.key,
|
|
table.type === "Table" ? table.value : [table.value],
|
|
),
|
|
);
|
|
} else if (Array.isArray(value)) {
|
|
if (table.type === "TableArray" && table.key.length === 1) {
|
|
value.push(table.value);
|
|
} else {
|
|
const last = value[value.length - 1];
|
|
deepAssignWithTable(last, {
|
|
type: table.type,
|
|
key: table.key.slice(1),
|
|
value: table.value,
|
|
});
|
|
}
|
|
} else if (typeof value === "object" && value !== null) {
|
|
deepAssignWithTable(value as Record<string, unknown>, {
|
|
type: table.type,
|
|
key: table.key.slice(1),
|
|
value: table.value,
|
|
});
|
|
} else {
|
|
throw new Error("Unexpected assign");
|
|
}
|
|
}
|
|
|
|
// ---------------------------------
|
|
// Parser combinators and generators
|
|
// ---------------------------------
|
|
|
|
function or<T>(parsers: ParserComponent<T>[]): ParserComponent<T> {
|
|
return (scanner: Scanner): ParseResult<T> => {
|
|
for (const parse of parsers) {
|
|
const result = parse(scanner);
|
|
if (result.ok) return result;
|
|
}
|
|
return failure();
|
|
};
|
|
}
|
|
|
|
function join<T>(
|
|
parser: ParserComponent<T>,
|
|
separator: string,
|
|
): ParserComponent<T[]> {
|
|
const Separator = character(separator);
|
|
return (scanner: Scanner): ParseResult<T[]> => {
|
|
const first = parser(scanner);
|
|
if (!first.ok) return failure();
|
|
const out: T[] = [first.body];
|
|
while (!scanner.eof()) {
|
|
if (!Separator(scanner).ok) break;
|
|
const result = parser(scanner);
|
|
if (!result.ok) {
|
|
throw new SyntaxError(`Invalid token after "${separator}"`);
|
|
}
|
|
out.push(result.body);
|
|
}
|
|
return success(out);
|
|
};
|
|
}
|
|
|
|
function kv<T>(
|
|
keyParser: ParserComponent<string[]>,
|
|
separator: string,
|
|
valueParser: ParserComponent<T>,
|
|
): ParserComponent<{ [key: string]: unknown }> {
|
|
const Separator = character(separator);
|
|
return (scanner: Scanner): ParseResult<{ [key: string]: unknown }> => {
|
|
const key = keyParser(scanner);
|
|
if (!key.ok) return failure();
|
|
const sep = Separator(scanner);
|
|
if (!sep.ok) {
|
|
throw new SyntaxError(`key/value pair doesn't have "${separator}"`);
|
|
}
|
|
const value = valueParser(scanner);
|
|
if (!value.ok) {
|
|
throw new SyntaxError(
|
|
`Value of key/value pair is invalid data format`,
|
|
);
|
|
}
|
|
return success(unflat(key.body, value.body));
|
|
};
|
|
}
|
|
|
|
function merge(
|
|
parser: ParserComponent<unknown[]>,
|
|
): ParserComponent<Record<string, unknown>> {
|
|
return (scanner: Scanner): ParseResult<Record<string, unknown>> => {
|
|
const result = parser(scanner);
|
|
if (!result.ok) return failure();
|
|
let body = {};
|
|
for (const record of result.body) {
|
|
if (typeof body === "object" && body !== null) {
|
|
// deno-lint-ignore no-explicit-any
|
|
body = deepMerge(body, record as Record<any, any>);
|
|
}
|
|
}
|
|
return success(body);
|
|
};
|
|
}
|
|
|
|
function repeat<T>(
|
|
parser: ParserComponent<T>,
|
|
): ParserComponent<T[]> {
|
|
return (scanner: Scanner) => {
|
|
const body: T[] = [];
|
|
while (!scanner.eof()) {
|
|
const result = parser(scanner);
|
|
if (!result.ok) break;
|
|
body.push(result.body);
|
|
scanner.nextUntilChar();
|
|
}
|
|
if (body.length === 0) return failure();
|
|
return success(body);
|
|
};
|
|
}
|
|
|
|
function surround<T>(
|
|
left: string,
|
|
parser: ParserComponent<T>,
|
|
right: string,
|
|
): ParserComponent<T> {
|
|
const Left = character(left);
|
|
const Right = character(right);
|
|
return (scanner: Scanner) => {
|
|
if (!Left(scanner).ok) {
|
|
return failure();
|
|
}
|
|
const result = parser(scanner);
|
|
if (!result.ok) {
|
|
throw new SyntaxError(`Invalid token after "${left}"`);
|
|
}
|
|
if (!Right(scanner).ok) {
|
|
throw new SyntaxError(
|
|
`Not closed by "${right}" after started with "${left}"`,
|
|
);
|
|
}
|
|
return success(result.body);
|
|
};
|
|
}
|
|
|
|
function character(str: string) {
|
|
return (scanner: Scanner): ParseResult<void> => {
|
|
scanner.nextUntilChar({ inline: true });
|
|
if (scanner.slice(0, str.length) !== str) return failure();
|
|
scanner.next(str.length);
|
|
scanner.nextUntilChar({ inline: true });
|
|
return success(undefined);
|
|
};
|
|
}
|
|
|
|
// -----------------------
|
|
// Parser components
|
|
// -----------------------
|
|
|
|
const BARE_KEY_REGEXP = /[A-Za-z0-9_-]/;
|
|
const FLOAT_REGEXP = /[0-9_\.e+\-]/i;
|
|
const END_OF_VALUE_REGEXP = /[ \t\r\n#,}\]]/;
|
|
|
|
export function bareKey(scanner: Scanner): ParseResult<string> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
if (!scanner.char() || !BARE_KEY_REGEXP.test(scanner.char())) {
|
|
return failure();
|
|
}
|
|
const acc: string[] = [];
|
|
while (scanner.char() && BARE_KEY_REGEXP.test(scanner.char())) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
const key = acc.join("");
|
|
return success(key);
|
|
}
|
|
|
|
function escapeSequence(scanner: Scanner): ParseResult<string> {
|
|
if (scanner.char() !== "\\") return failure();
|
|
scanner.next();
|
|
// See https://toml.io/en/v1.0.0-rc.3#string
|
|
switch (scanner.char()) {
|
|
case "b":
|
|
scanner.next();
|
|
return success("\b");
|
|
case "t":
|
|
scanner.next();
|
|
return success("\t");
|
|
case "n":
|
|
scanner.next();
|
|
return success("\n");
|
|
case "f":
|
|
scanner.next();
|
|
return success("\f");
|
|
case "r":
|
|
scanner.next();
|
|
return success("\r");
|
|
case "u":
|
|
case "U": {
|
|
// Unicode character
|
|
const codePointLen = scanner.char() === "u" ? 4 : 6;
|
|
const codePoint = parseInt(
|
|
"0x" + scanner.slice(1, 1 + codePointLen),
|
|
16,
|
|
);
|
|
const str = String.fromCodePoint(codePoint);
|
|
scanner.next(codePointLen + 1);
|
|
return success(str);
|
|
}
|
|
case '"':
|
|
scanner.next();
|
|
return success('"');
|
|
case "\\":
|
|
scanner.next();
|
|
return success("\\");
|
|
default:
|
|
throw new SyntaxError(
|
|
`Invalid escape sequence: \\${scanner.char()}`,
|
|
);
|
|
}
|
|
}
|
|
|
|
export function basicString(scanner: Scanner): ParseResult<string> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
if (scanner.char() !== '"') return failure();
|
|
scanner.next();
|
|
const acc = [];
|
|
while (scanner.char() !== '"' && !scanner.eof()) {
|
|
if (scanner.char() === "\n") {
|
|
throw new SyntaxError("Single-line string cannot contain EOL");
|
|
}
|
|
const escapedChar = escapeSequence(scanner);
|
|
if (escapedChar.ok) {
|
|
acc.push(escapedChar.body);
|
|
} else {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
}
|
|
if (scanner.eof()) {
|
|
throw new SyntaxError(
|
|
`Single-line string is not closed:\n${acc.join("")}`,
|
|
);
|
|
}
|
|
scanner.next(); // skip last '""
|
|
return success(acc.join(""));
|
|
}
|
|
|
|
export function literalString(scanner: Scanner): ParseResult<string> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
if (scanner.char() !== "'") return failure();
|
|
scanner.next();
|
|
const acc: string[] = [];
|
|
while (scanner.char() !== "'" && !scanner.eof()) {
|
|
if (scanner.char() === "\n") {
|
|
throw new SyntaxError("Single-line string cannot contain EOL");
|
|
}
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
if (scanner.eof()) {
|
|
throw new SyntaxError(
|
|
`Single-line string is not closed:\n${acc.join("")}`,
|
|
);
|
|
}
|
|
scanner.next(); // skip last "'"
|
|
return success(acc.join(""));
|
|
}
|
|
|
|
export function multilineBasicString(
|
|
scanner: Scanner,
|
|
): ParseResult<string> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
if (scanner.slice(0, 3) !== '"""') return failure();
|
|
scanner.next(3);
|
|
if (scanner.char() === "\n") {
|
|
// The first newline (LF) is trimmed
|
|
scanner.next();
|
|
} else if (scanner.slice(0, 2) === "\r\n") {
|
|
// The first newline (CRLF) is trimmed
|
|
scanner.next(2);
|
|
}
|
|
const acc: string[] = [];
|
|
while (scanner.slice(0, 3) !== '"""' && !scanner.eof()) {
|
|
// line ending backslash
|
|
if (scanner.slice(0, 2) === "\\\n") {
|
|
scanner.next();
|
|
scanner.nextUntilChar({ comment: false });
|
|
continue;
|
|
} else if (scanner.slice(0, 3) === "\\\r\n") {
|
|
scanner.next();
|
|
scanner.nextUntilChar({ comment: false });
|
|
continue;
|
|
}
|
|
const escapedChar = escapeSequence(scanner);
|
|
if (escapedChar.ok) {
|
|
acc.push(escapedChar.body);
|
|
} else {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
}
|
|
|
|
if (scanner.eof()) {
|
|
throw new SyntaxError(
|
|
`Multi-line string is not closed:\n${acc.join("")}`,
|
|
);
|
|
}
|
|
// if ends with 4 `"`, push the fist `"` to string
|
|
if (scanner.char(3) === '"') {
|
|
acc.push('"');
|
|
scanner.next();
|
|
}
|
|
scanner.next(3); // skip last '""""
|
|
return success(acc.join(""));
|
|
}
|
|
|
|
export function multilineLiteralString(
|
|
scanner: Scanner,
|
|
): ParseResult<string> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
if (scanner.slice(0, 3) !== "'''") return failure();
|
|
scanner.next(3);
|
|
if (scanner.char() === "\n") {
|
|
// The first newline (LF) is trimmed
|
|
scanner.next();
|
|
} else if (scanner.slice(0, 2) === "\r\n") {
|
|
// The first newline (CRLF) is trimmed
|
|
scanner.next(2);
|
|
}
|
|
const acc: string[] = [];
|
|
while (scanner.slice(0, 3) !== "'''" && !scanner.eof()) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
if (scanner.eof()) {
|
|
throw new SyntaxError(
|
|
`Multi-line string is not closed:\n${acc.join("")}`,
|
|
);
|
|
}
|
|
// if ends with 4 `'`, push the fist `'` to string
|
|
if (scanner.char(3) === "'") {
|
|
acc.push("'");
|
|
scanner.next();
|
|
}
|
|
scanner.next(3); // skip last "'''"
|
|
return success(acc.join(""));
|
|
}
|
|
|
|
const symbolPairs: [string, unknown][] = [
|
|
["true", true],
|
|
["false", false],
|
|
["inf", Infinity],
|
|
["+inf", Infinity],
|
|
["-inf", -Infinity],
|
|
["nan", NaN],
|
|
["+nan", NaN],
|
|
["-nan", NaN],
|
|
];
|
|
export function symbols(scanner: Scanner): ParseResult<unknown> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
const found = symbolPairs.find(([str]) =>
|
|
scanner.slice(0, str.length) === str
|
|
);
|
|
if (!found) return failure();
|
|
const [str, value] = found;
|
|
scanner.next(str.length);
|
|
return success(value);
|
|
}
|
|
|
|
export const dottedKey = join(or([bareKey, basicString, literalString]), ".");
|
|
|
|
export function integer(scanner: Scanner): ParseResult<number | string> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
|
|
// If binary / octal / hex
|
|
const first2 = scanner.slice(0, 2);
|
|
if (first2.length === 2 && /0(?:x|o|b)/i.test(first2)) {
|
|
scanner.next(2);
|
|
const acc = [first2];
|
|
while (/[0-9a-f_]/i.test(scanner.char()) && !scanner.eof()) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
if (acc.length === 1) return failure();
|
|
return success(acc.join(""));
|
|
}
|
|
|
|
const acc = [];
|
|
if (/[+-]/.test(scanner.char())) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
while (/[0-9_]/.test(scanner.char()) && !scanner.eof()) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
|
|
if (acc.length === 0 || (acc.length === 1 && /[+-]/.test(acc[0]!))) {
|
|
return failure();
|
|
}
|
|
|
|
const int = parseInt(acc.filter((char) => char !== "_").join(""));
|
|
return success(int);
|
|
}
|
|
|
|
export function float(scanner: Scanner): ParseResult<number> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
|
|
// lookahead validation is needed for integer value is similar to float
|
|
let position = 0;
|
|
while (
|
|
scanner.char(position) &&
|
|
!END_OF_VALUE_REGEXP.test(scanner.char(position))
|
|
) {
|
|
if (!FLOAT_REGEXP.test(scanner.char(position))) return failure();
|
|
position++;
|
|
}
|
|
|
|
const acc = [];
|
|
if (/[+-]/.test(scanner.char())) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
while (FLOAT_REGEXP.test(scanner.char()) && !scanner.eof()) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
|
|
if (acc.length === 0) return failure();
|
|
const float = parseFloat(acc.filter((char) => char !== "_").join(""));
|
|
if (isNaN(float)) return failure();
|
|
|
|
return success(float);
|
|
}
|
|
|
|
export function dateTime(scanner: Scanner): ParseResult<Date> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
|
|
let dateStr = scanner.slice(0, 10);
|
|
// example: 1979-05-27
|
|
if (!/^\d{4}-\d{2}-\d{2}/.test(dateStr)) return failure();
|
|
scanner.next(10);
|
|
|
|
const acc = [];
|
|
// example: 1979-05-27T00:32:00Z
|
|
while (/[ 0-9TZ.:-]/.test(scanner.char()) && !scanner.eof()) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
dateStr += acc.join("");
|
|
const date = new Date(dateStr.trim());
|
|
// invalid date
|
|
if (isNaN(date.getTime())) {
|
|
throw new SyntaxError(`Invalid date string "${dateStr}"`);
|
|
}
|
|
|
|
return success(date);
|
|
}
|
|
|
|
export function localTime(scanner: Scanner): ParseResult<string> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
|
|
let timeStr = scanner.slice(0, 8);
|
|
if (!/^(\d{2}):(\d{2}):(\d{2})/.test(timeStr)) return failure();
|
|
scanner.next(8);
|
|
|
|
const acc = [];
|
|
if (scanner.char() !== ".") return success(timeStr);
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
|
|
while (/[0-9]/.test(scanner.char()) && !scanner.eof()) {
|
|
acc.push(scanner.char());
|
|
scanner.next();
|
|
}
|
|
timeStr += acc.join("");
|
|
return success(timeStr);
|
|
}
|
|
|
|
export function arrayValue(scanner: Scanner): ParseResult<unknown[]> {
|
|
scanner.nextUntilChar({ inline: true });
|
|
|
|
if (scanner.char() !== "[") return failure();
|
|
scanner.next();
|
|
|
|
const array: unknown[] = [];
|
|
while (!scanner.eof()) {
|
|
scanner.nextUntilChar();
|
|
const result = value(scanner);
|
|
if (!result.ok) break;
|
|
array.push(result.body);
|
|
scanner.nextUntilChar({ inline: true });
|
|
// may have a next item, but trailing comma is allowed at array
|
|
if (scanner.char() !== ",") break;
|
|
scanner.next();
|
|
}
|
|
scanner.nextUntilChar();
|
|
|
|
if (scanner.char() !== "]") throw new SyntaxError("Array is not closed");
|
|
scanner.next();
|
|
|
|
return success(array);
|
|
}
|
|
|
|
export function inlineTable(
|
|
scanner: Scanner,
|
|
): ParseResult<Record<string, unknown>> {
|
|
scanner.nextUntilChar();
|
|
if (scanner.char(1) === "}") {
|
|
scanner.next(2);
|
|
return success({});
|
|
}
|
|
const pairs = surround(
|
|
"{",
|
|
join(pair, ","),
|
|
"}",
|
|
)(scanner);
|
|
if (!pairs.ok) return failure();
|
|
let table = {};
|
|
for (const pair of pairs.body) {
|
|
table = deepMerge(table, pair);
|
|
}
|
|
return success(table);
|
|
}
|
|
|
|
export const value = or([
|
|
multilineBasicString,
|
|
multilineLiteralString,
|
|
basicString,
|
|
literalString,
|
|
symbols,
|
|
dateTime,
|
|
localTime,
|
|
float,
|
|
integer,
|
|
arrayValue,
|
|
inlineTable,
|
|
]);
|
|
|
|
export const pair = kv(dottedKey, "=", value);
|
|
|
|
export function block(
|
|
scanner: Scanner,
|
|
): ParseResult<BlockParseResultBody> {
|
|
scanner.nextUntilChar();
|
|
const result = merge(repeat(pair))(scanner);
|
|
if (result.ok) return success({ type: "Block", value: result.body });
|
|
return failure();
|
|
}
|
|
|
|
export const tableHeader = surround("[", dottedKey, "]");
|
|
|
|
export function table(scanner: Scanner): ParseResult<BlockParseResultBody> {
|
|
scanner.nextUntilChar();
|
|
const header = tableHeader(scanner);
|
|
if (!header.ok) return failure();
|
|
scanner.nextUntilChar();
|
|
const b = block(scanner);
|
|
return success({
|
|
type: "Table",
|
|
key: header.body,
|
|
value: b.ok ? b.body.value : {},
|
|
});
|
|
}
|
|
|
|
export const tableArrayHeader = surround("[[", dottedKey, "]]");
|
|
|
|
export function tableArray(
|
|
scanner: Scanner,
|
|
): ParseResult<BlockParseResultBody> {
|
|
scanner.nextUntilChar();
|
|
const header = tableArrayHeader(scanner);
|
|
if (!header.ok) return failure();
|
|
scanner.nextUntilChar();
|
|
const b = block(scanner);
|
|
return success({
|
|
type: "TableArray",
|
|
key: header.body,
|
|
value: b.ok ? b.body.value : {},
|
|
});
|
|
}
|
|
|
|
export function toml(
|
|
scanner: Scanner,
|
|
): ParseResult<Record<string, unknown>> {
|
|
const blocks = repeat(or([block, tableArray, table]))(scanner);
|
|
if (!blocks.ok) return failure();
|
|
let body = {};
|
|
for (const block of blocks.body) {
|
|
switch (block.type) {
|
|
case "Block": {
|
|
body = deepMerge(body, block.value);
|
|
break;
|
|
}
|
|
case "Table": {
|
|
deepAssignWithTable(body, block);
|
|
break;
|
|
}
|
|
case "TableArray": {
|
|
deepAssignWithTable(body, block);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return success(body);
|
|
}
|
|
|
|
export function parserFactory<T>(parser: ParserComponent<T>) {
|
|
return (tomlString: string): T => {
|
|
const scanner = new Scanner(tomlString);
|
|
|
|
let parsed: ParseResult<T> | null = null;
|
|
let err: Error | null = null;
|
|
try {
|
|
parsed = parser(scanner);
|
|
} catch (e) {
|
|
err = e instanceof Error ? e : new Error("Invalid error type caught");
|
|
}
|
|
|
|
if (err || !parsed || !parsed.ok || !scanner.eof()) {
|
|
const position = scanner.position();
|
|
const subStr = tomlString.slice(0, position);
|
|
const lines = subStr.split("\n");
|
|
const row = lines.length;
|
|
const column = (() => {
|
|
let count = subStr.length;
|
|
for (const line of lines) {
|
|
if (count <= line.length) break;
|
|
count -= line.length + 1;
|
|
}
|
|
return count;
|
|
})();
|
|
const message = `Parse error on line ${row}, column ${column}: ${
|
|
err ? err.message : `Unexpected character: "${scanner.char()}"`
|
|
}`;
|
|
throw new SyntaxError(message);
|
|
}
|
|
return parsed.body;
|
|
};
|
|
}
|