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Merge pull request #15 from hildjj/libs
Add async version for importing libs.
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@@ -110,3 +110,5 @@ dist | |
test/ | ||
tsconfig.json | ||
.github/ | ||
.editorconfig | ||
eslint.config.js |
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@@ -1,3 +1,8 @@ | ||
{ | ||
"eslint.experimental.useFlatConfig": true | ||
} | ||
"eslint.experimental.useFlatConfig": true, | ||
"eslint.validate": [ | ||
"javascript", | ||
"peggy", | ||
"typescript" | ||
] | ||
} |
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import mod from "@peggyjs/eslint-config/flat/module.js"; | ||
import modern from "@peggyjs/eslint-config/flat/modern.js"; | ||
import peggyjs from "@peggyjs/eslint-plugin/lib/flat/recommended.js"; | ||
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export default [ | ||
{ | ||
ignores: [ | ||
"node_module/**", | ||
"**/*.d.ts", | ||
"test/fixtures/*.js", | ||
], | ||
}, | ||
mod, | ||
peggyjs, | ||
{ | ||
files: [ | ||
"test/**", | ||
], | ||
...modern, | ||
}, | ||
]; |
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@@ -0,0 +1,79 @@ | ||
import peggy from "peggy"; | ||
import url from "node:url"; | ||
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/** | ||
* Generate a GrammarLocation for one of the functions up the call stack | ||
* from here. 0 is not useful, it's always the callLocation function. | ||
* 1 is unlikely to be useful, it's the place you are calling callLocation from, | ||
* so you presumably know where you are. 2 is the caller of the function you | ||
* are in, etc. | ||
* | ||
* @param {number} depth How deep in the callstack to go? | ||
* @param {number} [offset=1] How many characters to add to the location to | ||
* account for the calling apparatus, such as the backtick or the function | ||
* name + paren. | ||
* @returns {peggy.GrammarLocation} Location of the grammar in the enclosing | ||
* file. | ||
* @see https://v8.dev/docs/stack-trace-api | ||
*/ | ||
export function callLocation(depth, offset = 1) { | ||
const old = Error.prepareStackTrace; | ||
Error.prepareStackTrace = (_, s) => s; | ||
const stack = /** @type {NodeJS.CallSite[]} */( | ||
/** @type {unknown} */(new Error().stack) | ||
); | ||
Error.prepareStackTrace = old; | ||
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// Not v8, or short-stacked vs. expectations | ||
if (!Array.isArray(stack) || (stack.length < depth)) { | ||
return new peggy.GrammarLocation( | ||
"peggy-tag", | ||
{ | ||
offset: 0, | ||
line: 0, | ||
column: 0, | ||
} | ||
); | ||
} | ||
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const callsite = stack[depth]; | ||
const fn = callsite.getFileName(); | ||
const path = fn?.startsWith("file:") ? url.fileURLToPath(fn) : fn; | ||
return new peggy.GrammarLocation( | ||
path, | ||
{ | ||
offset: callsite.getPosition() + offset, | ||
// These will be 0 if the frame selected is native code, which | ||
// we should never be doing in this package. | ||
line: callsite.getLineNumber() || 0, | ||
column: (callsite.getColumnNumber() || 0) + offset, | ||
} | ||
); | ||
} | ||
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/** | ||
* Combine the parameters from a tagged template literal into a string. | ||
* | ||
* @param {string[]} strings | ||
* @param {any[]} values | ||
* @returns {string} | ||
*/ | ||
export function combine(strings, values) { | ||
return strings.reduce((t, s, i) => t + s + String(values[i] ?? ""), ""); | ||
} | ||
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/** | ||
* If this is a grammar error, reformat the message using the associated | ||
* text. | ||
* | ||
* @param {any} error An error th | ||
* @param {any} source | ||
* @param {string} text | ||
* @returns {Error} Error with reformatted message, if possible | ||
*/ | ||
export function formatMessage(error, source, text) { | ||
if ((typeof error === "object") && (typeof error?.format === "function")) { | ||
error.message = error.format([{ source, text }]); | ||
} | ||
return error; | ||
} |
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