surma
d44f1d9677
Checkpoint before integration and package validation. Assisted-by: SurmAgent:unknown [read] [edit] [bash]
47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
import { assert } from "./assert.js";
|
|
|
|
/* A SyntaxError should report the column of the offending token, not always
|
|
column 1. The location is exposed through the error's stack trace. */
|
|
function errorLocation(src) {
|
|
try {
|
|
eval(src);
|
|
} catch (e) {
|
|
const m = /<input>:(\d+):(\d+)/.exec(e.stack);
|
|
if (m)
|
|
return { line: +m[1], col: +m[2] };
|
|
}
|
|
return { line: -1, col: -1 };
|
|
}
|
|
|
|
assert(errorLocation("let x = ;").col, 9);
|
|
assert(errorLocation("1 + + ;").col, 7);
|
|
assert(errorLocation("hocuspocus(").col, 12);
|
|
assert(errorLocation("a b").col, 3);
|
|
|
|
/* line number stays correct and the column is relative to the line start */
|
|
{
|
|
const loc = errorLocation("let ok = 1\nlet z = @");
|
|
assert(loc.line, 2);
|
|
assert(loc.col, 9);
|
|
}
|
|
|
|
/* the offending token starts after a multi-line template literal */
|
|
{
|
|
const loc = errorLocation("`line1\nline2\nline3`; let y = @");
|
|
assert(loc.line, 3);
|
|
assert(loc.col, 17);
|
|
}
|
|
|
|
/* the error is raised while scanning a multi-line token: the location is
|
|
the token's start, not where scanning stopped */
|
|
{
|
|
const loc = errorLocation("let x = `abc\ndef");
|
|
assert(loc.line, 1);
|
|
assert(loc.col, 9);
|
|
}
|
|
{
|
|
const loc = errorLocation("let s = 'ab\\\ncd");
|
|
assert(loc.line, 1);
|
|
assert(loc.col, 9);
|
|
}
|