forked from zhurui/management
37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
|
|
|
|
import { print } from "@webassemblyjs/wast-printer";
|
|
var SHOW_LINES_AROUND_POINTER = 5;
|
|
|
|
function repeat(char, nb) {
|
|
return Array(nb).fill(char).join("");
|
|
} // TODO(sven): allow arbitrary ast nodes
|
|
|
|
|
|
export function codeFrameFromAst(ast, loc) {
|
|
return codeFrameFromSource(print(ast), loc);
|
|
}
|
|
export function codeFrameFromSource(source, loc) {
|
|
var start = loc.start,
|
|
end = loc.end;
|
|
var length = 1;
|
|
|
|
if (_typeof(end) === "object") {
|
|
length = end.column - start.column + 1;
|
|
}
|
|
|
|
return source.split("\n").reduce(function (acc, line, lineNbr) {
|
|
if (Math.abs(start.line - lineNbr) < SHOW_LINES_AROUND_POINTER) {
|
|
acc += line + "\n";
|
|
} // Add a new line with the pointer padded left
|
|
|
|
|
|
if (lineNbr === start.line - 1) {
|
|
acc += repeat(" ", start.column - 1);
|
|
acc += repeat("^", length);
|
|
acc += "\n";
|
|
}
|
|
|
|
return acc;
|
|
}, "");
|
|
} |