TanTan
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73 lines
3.3 KiB
Plaintext
73 lines
3.3 KiB
Plaintext
// ------------------------------------------------------------------
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// Value Guard
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// ------------------------------------------------------------------
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// prettier-ignore
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function HasPropertyKey(value, key) {
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return key in value;
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}
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// prettier-ignore
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function IsObjectValue(value) {
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return typeof value === 'object' && value !== null;
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}
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// prettier-ignore
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function IsArrayValue(value) {
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return globalThis.Array.isArray(value);
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}
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// ------------------------------------------------------------------
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// Parser Guard
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// ------------------------------------------------------------------
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/** Returns true if the value is a Array Parser */
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export function IsArray(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Array' && HasPropertyKey(value, 'parser') && IsObjectValue(value.parser);
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}
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/** Returns true if the value is a Const Parser */
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export function IsConst(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Const' && HasPropertyKey(value, 'value') && typeof value.value === 'string';
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}
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/** Returns true if the value is a Context Parser */
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export function IsContext(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Context' && HasPropertyKey(value, 'left') && IsParser(value.left) && HasPropertyKey(value, 'right') && IsParser(value.right);
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}
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/** Returns true if the value is a Ident Parser */
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export function IsIdent(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Ident';
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}
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/** Returns true if the value is a Number Parser */
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export function IsNumber(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Number';
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}
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/** Returns true if the value is a Optional Parser */
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export function IsOptional(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Optional' && HasPropertyKey(value, 'parser') && IsObjectValue(value.parser);
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}
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/** Returns true if the value is a Ref Parser */
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export function IsRef(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Ref' && HasPropertyKey(value, 'ref') && typeof value.ref === 'string';
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}
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/** Returns true if the value is a String Parser */
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export function IsString(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'String' && HasPropertyKey(value, 'options') && IsArrayValue(value.options);
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}
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/** Returns true if the value is a Tuple Parser */
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export function IsTuple(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Tuple' && HasPropertyKey(value, 'parsers') && IsArrayValue(value.parsers);
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}
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/** Returns true if the value is a Union Parser */
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export function IsUnion(value) {
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return IsObjectValue(value) && HasPropertyKey(value, 'type') && value.type === 'Union' && HasPropertyKey(value, 'parsers') && IsArrayValue(value.parsers);
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}
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/** Returns true if the value is a Parser */
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export function IsParser(value) {
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// prettier-ignore
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return (IsArray(value) ||
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IsConst(value) ||
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IsContext(value) ||
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IsIdent(value) ||
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IsNumber(value) ||
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IsOptional(value) ||
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IsRef(value) ||
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IsString(value) ||
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IsTuple(value) ||
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IsUnion(value));
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}
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