parjs/dist/internal/parsers/newline.js

Library for building parsers using combinators.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.uniNewline = exports.newline = void 0;
const char_info_1 = require("char-info");
const parser_1 = require("../parser");
const result_1 = require("../result");
class Newline extends parser_1.ParjserBase {
    constructor(_unicodeRecognizer) {
        super();
        this._unicodeRecognizer = _unicodeRecognizer;
        this.type = "newline";
        this.expecting = "expecting newline";
    }
    _apply(ps) {
        const { position, input } = ps;
        if (position >= input.length) {
            ps.kind = result_1.ResultKind.SoftFail;
            return;
        }
        const pair = input.slice(position, position + 2);
        if (pair === "\r\n") {
            ps.position += 2;
            ps.value = pair;
            ps.kind = result_1.ResultKind.Ok;
            return;
        }
        const firstChar = pair.charCodeAt(0);
        if (firstChar === char_info_1.AsciiCodes.newline ||
            firstChar === char_info_1.AsciiCodes.carriageReturn ||
            this._unicodeRecognizer?.(firstChar)) {
            ps.position++;
            ps.value = pair[0];
            ps.kind = result_1.ResultKind.Ok;
            return;
        }
        ps.kind = result_1.ResultKind.SoftFail;
    }
}
/**
 * Parses an ASCII newline, which can be a single character or the sequence `\r\n`. Yields the text
 * that was parsed.
 */
function newline() {
    return new Newline();
}
exports.newline = newline;
/**
 * Parses a Unicode newline, which includes ASCII newline strings as well as other vertical
 * separators such as PARAGRAPH SEPARATOR.
 */
function uniNewline() {
    return new Newline(char_info_1.uniIsNewline.code);
}
exports.uniNewline = uniNewline;
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