All files / src/compiler/utils compile_diagnostic.js

96.22% Statements 102/106
100% Branches 14/14
100% Functions 6/6
96.19% Lines 101/105

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 1062x 2x 2x 2x 2x 2x 2x 2x 9031x 9031x 9031x 2x 2x 2x 2x 2x 2x 1661x 1661x 1661x 1661x 1661x 1661x 1661x 1661x 7370x 7370x 7370x 1661x 1661x 1661x 1661x 5709x 1661x 1661x 1661x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 1666x 1666x 1666x 1666x 1666x 1666x 1666x 1666x 1666x 1666x 1666x 1666x 1663x 1663x 1666x 1666x 1661x 1661x 1661x 1661x 1661x 1661x 1661x 1666x 1666x 1666x 1x 1x 1x 1x 1x 1x     1x 1x 1x     1x 1x 1x 1666x 1666x 837x 837x 837x 837x 837x 837x 837x 837x 837x 837x 1666x  
/** @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;
 * 	filename?: string;
 * 	start?: Location;
 * 	end?: Location;
 * 	position?: [number, number];
 * 	frame?: string;
 * }} ICompileDiagnostic */
 
/** @implements {ICompileDiagnostic} */
export class CompileDiagnostic extends Error {
	name = 'CompileDiagnostic';
 
	/**
	 * @param {string} code
	 * @param {string} message
	 * @param {[number, number] | undefined} position
	 */
	constructor(code, message, position) {
		super(message);
		this.code = code;
 
		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
		};
	}
}