27038711375

Committed 05 Jun 2026 08:35PM UTC coverage: 96.836% (-0.006%) from 96.842%

Build # 27038711375

Build Type

Pull #372

github

Committed by

web-flow

Commit Message

Merge a33d3d5aa into 3362118f9

Pull Request Pull Request #372: feat(core): prove the range-contract shape on four representative languages

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6375 of 6716 branches covered (94.92%)

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132 of 136 new or added lines in 6 files covered. (97.06%)

3 existing lines in 1 file now uncovered.

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94.51

/src/utils/scale.js

/**
 * Scale-range helpers — pure.
 *
 * Each form declares its maximum supported value as a bigint export
 * (`cardinalMax`, `ordinalMax`, `currencyMax`): the smallest value the form
 * refuses, so the largest it converts is that minus one. `UNBOUNDED` (null)
 * means no fixed limit.
 *
 * These helpers derive that bigint from a language's own scale-table size, so
 * the ceiling tracks the vocabulary and can't drift. A language whose shape
 * fits none of them declares the value directly (`bounded(n)` or a literal
 * bigint). They are pure — derivations and one comparison (`exceedsMax`) the
 * entry guards use. Nothing here throws; the language throws, and the
 * verification checks (boundary, gaps, injectivity) live in the gate.
 */

/** No fixed ceiling — recursive/compounding spellers (th-TH, fa-IR, …). */
export const UNBOUNDED = null

/**
 * Whether a parsed value is out of a form's range — pure; the caller throws.
 * Pass `fraction` (the decimal digit string) only when the fraction is spelled
 * via the scale builder; digit-by-digit forms omit it so long fractions stay
 * valid. A `max` of `null` (unbounded) is never exceeded.
 * @param {bigint} value The integer magnitude to test (integer part, dollars, …)
 * @param {bigint | null} max The form's ceiling, or null for no limit
 * @param {string} [fraction] The decimal digit string, when integer-spelled
 * @returns {boolean} true if `value` — or its integer-spelled fraction — exceeds `max`
 */
export function exceedsMax(value, max, fraction) {
  if (max === null) return false
  if (value >= max) return true
  return fraction ? BigInt(fraction) >= max : false
}

/**
 * 3-digit grouping, scale array starting at "thousand" (en-US, de-DE, ru-RU, …).
 * @param {number} scaleCount Number of scale words in the table
 * @returns {bigint} The first unsupported value (10^((scaleCount + 1) * 3))
 */
export function western(scaleCount) {
  return 10n ** BigInt((scaleCount + 1) * 3)
}

/**
 * Myriad (4-digit) grouping — one scale word per power of 10,000 (ja-JP, ko-KR).
 * @param {number} scaleCount Number of scale words in the table
 * @returns {bigint} The first unsupported value
 */
export function myriad(scaleCount) {
  return 10n ** BigInt((scaleCount + 1) * 4)
}

/**
 * South Asian 3-2-2 grouping: a 3-digit base segment then 2 digits per scale
 * word, with the table's index 0 reserved for the (empty) units slot.
 * @param {number} wordCount Length of the scale-word table (including the units slot)
 * @returns {bigint} The first unsupported value
 */
export function indian(wordCount) {
  return 10n ** BigInt(3 + 2 * (wordCount - 1))
}

/**
 * Long scale — each unit (a base scale word, or a prefix) yields two levels
 * (-illion / -illiard), spanning 6 powers of ten. es-*, fr-*, it-IT.
 * @param {number} unitCount Number of base scale words or prefixes
 * @returns {bigint} The first unsupported value (10^(6 * (unitCount + 1)))
 */
export function longScale(unitCount) {
  return 10n ** BigInt(6 * (unitCount + 1))
}

/**
 * Escape hatch: a structural bound given as its base-10 exponent (zh: `bounded(16)`).
 * @param {number} exponent The base-10 exponent of the ceiling
 * @returns {bigint} 10^exponent
 */
export function bounded(exponent) {
  return 10n ** BigInt(exponent)
}

1	/**	3✔
2	* Scale-range helpers — pure.	3✔
3	*	3✔
4	* Each form declares its maximum supported value as a bigint export	3✔
5	* (`cardinalMax`, `ordinalMax`, `currencyMax`): the smallest value the form	3✔
6	* refuses, so the largest it converts is that minus one. `UNBOUNDED` (null)	3✔
7	* means no fixed limit.	3✔
8	*	3✔
9	* These helpers derive that bigint from a language's own scale-table size, so	3✔
10	* the ceiling tracks the vocabulary and can't drift. A language whose shape	3✔
11	* fits none of them declares the value directly (`bounded(n)` or a literal	3✔
12	* bigint). They are pure — derivations and one comparison (`exceedsMax`) the	3✔
13	* entry guards use. Nothing here throws; the language throws, and the	3✔
14	* verification checks (boundary, gaps, injectivity) live in the gate.	3✔
15	*/	3✔
16		3✔
17	/** No fixed ceiling — recursive/compounding spellers (th-TH, fa-IR, …). */	3✔
18	export const UNBOUNDED = null	3✔
19		3✔
20	/**	3✔
21	* Whether a parsed value is out of a form's range — pure; the caller throws.	3✔
22	* Pass `fraction` (the decimal digit string) only when the fraction is spelled	3✔
23	* via the scale builder; digit-by-digit forms omit it so long fractions stay	3✔
24	* valid. A `max` of `null` (unbounded) is never exceeded.	3✔
25	* @param {bigint} value The integer magnitude to test (integer part, dollars, …)	3✔
26	* @param {bigint \| null} max The form's ceiling, or null for no limit	3✔
27	* @param {string} [fraction] The decimal digit string, when integer-spelled	3✔
28	* @returns {boolean} true if `value` — or its integer-spelled fraction — exceeds `max`	3✔
29	*/	3✔
30	export function exceedsMax(value, max, fraction) {	3✔
31	if (max === null) return false	5,140!
32	if (value >= max) return true	5,140✔
33	return fraction ? BigInt(fraction) >= max : false	5,140✔
34	}	5,140✔
35		3✔
36	/**	3✔
37	* 3-digit grouping, scale array starting at "thousand" (en-US, de-DE, ru-RU, …).	3✔
38	* @param {number} scaleCount Number of scale words in the table	3✔
39	* @returns {bigint} The first unsupported value (10^((scaleCount + 1) * 3))	3✔
40	*/	3✔
41	export function western(scaleCount) {	3✔
42	return 10n ** BigInt((scaleCount + 1) * 3)	9✔
43	}	9✔
44		3✔
45	/**	3✔
46	* Myriad (4-digit) grouping — one scale word per power of 10,000 (ja-JP, ko-KR).	3✔
47	* @param {number} scaleCount Number of scale words in the table	3✔
48	* @returns {bigint} The first unsupported value	3✔
49	*/	3✔
50	export function myriad(scaleCount) {	3✔
NEW 51	return 10n ** BigInt((scaleCount + 1) * 4)	×
NEW 52	}	×
53		3✔
54	/**	3✔
55	* South Asian 3-2-2 grouping: a 3-digit base segment then 2 digits per scale	3✔
56	* word, with the table's index 0 reserved for the (empty) units slot.	3✔
57	* @param {number} wordCount Length of the scale-word table (including the units slot)	3✔
58	* @returns {bigint} The first unsupported value	3✔
59	*/	3✔
60	export function indian(wordCount) {	3✔
NEW 61	return 10n ** BigInt(3 + 2 * (wordCount - 1))	×
NEW 62	}	×
63		3✔
64	/**	3✔
65	* Long scale — each unit (a base scale word, or a prefix) yields two levels	3✔
66	* (-illion / -illiard), spanning 6 powers of ten. es-, fr-, it-IT.	3✔
67	* @param {number} unitCount Number of base scale words or prefixes	3✔
68	* @returns {bigint} The first unsupported value (10^(6 * (unitCount + 1)))	3✔
69	*/	3✔
70	export function longScale(unitCount) {	3✔
71	return 10n ** BigInt(6 * (unitCount + 1))	9✔
72	}	9✔
73		3✔
74	/**	3✔
75	* Escape hatch: a structural bound given as its base-10 exponent (zh: `bounded(16)`).	3✔
76	* @param {number} exponent The base-10 exponent of the ceiling	3✔
77	* @returns {bigint} 10^exponent	3✔
78	*/	3✔
79	export function bounded(exponent) {	3✔
80	return 10n ** BigInt(exponent)	9✔
81	}	9✔

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