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svelte

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Cybernetically enhanced web apps

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/** @import { Location } from 'locate-character' */ import * as state from '../state.js'; const regex_tabs = /^\t+/; /** * @param {string} str */ function tabs_to_spaces(str) { return str.replace(regex_tabs, (match) => match.split('\t').join(' ')); } /** * @param {string} source * @param {number} line * @param {number} column */ function get_code_frame(source, line, column) { const lines = source.split('\n'); const frame_start = Math.max(0, line - 2); const frame_end = Math.min(line + 3, lines.length); const digits = String(frame_end + 1).length; return lines .slice(frame_start, frame_end) .map((str, i) => { const is_error_line = frame_start + i === line; const line_num = String(i + frame_start + 1).padStart(digits, ' '); if (is_error_line) { const indicator = ' '.repeat(digits + 2 + tabs_to_spaces(str.slice(0, column)).length) + '^'; return `${line_num}: ${tabs_to_spaces(str)}\n${indicator}`; } return `${line_num}: ${tabs_to_spaces(str)}`; }) .join('\n'); } /** * @typedef {{ * code: string; * message: string; * stack?: string; * filename?: string; * start?: Location; * end?: Location; * position?: [number, number]; * frame?: string; * }} ICompileDiagnostic */ /** @implements {ICompileDiagnostic} */ export class CompileDiagnostic { name = 'CompileDiagnostic'; /** * @param {string} code * @param {string} message * @param {[number, number] | undefined} position */ constructor(code, message, position) { this.code = code; this.message = message; if (state.filename) { this.filename = state.filename; } if (position) { this.position = position; this.start = state.locator(position[0]); this.end = state.locator(position[1]); if (this.start && this.end) { this.frame = get_code_frame(state.source, this.start.line - 1, this.end.column); } } } toString() { let out = `${this.code}: ${this.message}`; if (this.filename) { out += `\n${this.filename}`; if (this.start) { out += `:${this.start.line}:${this.start.column}`; } } if (this.frame) { out += `\n${this.frame}`; } return out; } toJSON() { return { code: this.code, message: this.message, filename: this.filename, start: this.start, end: this.end, position: this.position, frame: this.frame }; } }