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feat(async-flow): add more context to vow rejection
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| /** | ||
| * @import {HostCall} from './types.js'; | ||
| */ | ||
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| const { assign } = Object; | ||
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| /** Doesn't need to be exhaustive, just a little prettier than JSON-quoting. */ | ||
| const BEST_GUESS_ID_REGEX = /^[a-zA-Z_$][a-zA-Z0-9_$]*$/; | ||
|
|
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| /** | ||
| * Return an object that mimics a template strings array. | ||
| * | ||
| * @param {string[]} strings | ||
| * @returns {TemplateStringsArray} | ||
| */ | ||
| export const makeTemplateStringsArray = strings => | ||
| harden(assign([...strings], { raw: strings })); | ||
| harden(makeTemplateStringsArray); | ||
|
|
||
| /** | ||
| * When used as a template tag, this function returns its arguments verbatim. | ||
| * | ||
| * @template {any[]} A | ||
| * @param {A} allArgs | ||
| * @returns {A} | ||
| */ | ||
| export const idTemplateTag = (...allArgs) => allArgs; | ||
| harden(idTemplateTag); | ||
|
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| /** | ||
| * Convert a replay membrane HostCall structure to template arguments. | ||
| * | ||
| * @param {HostCall} hostCall | ||
| * @returns {[TemplateStringsArray, ...any[]]} | ||
| */ | ||
| export const hostCallToTemplateArgs = ({ target, method, eventual }) => { | ||
| /** @type {string[]} */ | ||
| const tmpl = []; | ||
|
|
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| /** @type {any[]} */ | ||
| const args = []; | ||
|
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| const tpush = str => { | ||
| tmpl.push(str); | ||
| }; | ||
| const tappend = str => { | ||
| tmpl[tmpl.length - 1] += str; | ||
| }; | ||
|
|
||
| tpush(eventual ? 'E' : ''); | ||
| tappend('('); | ||
| args.push(target); | ||
| tpush(')'); | ||
| if (typeof method === 'string') { | ||
| if (BEST_GUESS_ID_REGEX.test(method)) { | ||
| tappend(`.${method}`); | ||
| } else { | ||
| tappend(`[${JSON.stringify(method)}]`); | ||
| } | ||
| } else if (method !== undefined) { | ||
| tappend(`[${String(method)}]`); | ||
| } | ||
| tappend('(...)'); | ||
|
|
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| return /** @type {const} */ ([makeTemplateStringsArray(tmpl), ...args]); | ||
| }; | ||
| harden(hostCallToTemplateArgs); | ||
|
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| /** | ||
| * Template tag to flatten any nested template arguments by joining them to the | ||
| * returned template strings and rest arguments. | ||
| * | ||
| * @param {TemplateStringsArray} tmpl | ||
| * @param {any[]} args | ||
| * @returns {[TemplateStringsArray, ...any[]]} | ||
| */ | ||
| export const inlineTemplateArgs = (tmpl, ...args) => { | ||
| /** @type {string[]} */ | ||
| const itmpl = [tmpl[0]]; | ||
| /** @type {any[]} */ | ||
| const iargs = []; | ||
| for (let i = 0; i < args.length; i += 1) { | ||
| const arg = args[i]; | ||
| const nextStr = tmpl[i + 1]; | ||
|
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| // Could be a template and argument list. | ||
| const argLength = Array.isArray(arg) ? arg.length : 0; | ||
| /** @type {string[] & { raw: string[] } | undefined} */ | ||
| const t = argLength && arg[0] ? arg[0] : undefined; | ||
| if ( | ||
| !Array.isArray(t) || | ||
| !Array.isArray(t.raw) || | ||
| t.length !== argLength || | ||
| t.raw.length !== argLength || | ||
| !t.every(v => typeof v === 'string') || | ||
| !t.raw.every(v => typeof v === 'string') | ||
| ) { | ||
| // Not a template string array shape, so just push it. | ||
| iargs.push(arg); | ||
| nextStr === undefined || itmpl.push(nextStr); | ||
| continue; | ||
| } | ||
|
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| // Join the current outer template string with the first inner one. | ||
| itmpl[itmpl.length - 1] += t[0]; | ||
|
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| // Push the rest of the inner template strings and arguments. | ||
| itmpl.push(...t.slice(1)); | ||
| iargs.push(...arg.slice(1)); | ||
|
|
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| if (nextStr !== undefined) { | ||
| // Join the last inner template string with the next outer one. | ||
| itmpl[itmpl.length - 1] += nextStr; | ||
| } | ||
| } | ||
|
|
||
| return /** @type {const} */ ([makeTemplateStringsArray(itmpl), ...iargs]); | ||
| }; | ||
| harden(inlineTemplateArgs); |
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