/**
 *  Check if the parameter is primitive string
 *
 * @param str
 * @returns {boolean}
 *  @example
 *  isPrimitiveString('');        // true
 *  isPrimitiveString(0);         // false
 *  isPrimitiveString(NaN);       // false
 *  isPrimitiveString(undefined); // false
 *  isPrimitiveString(null);      // false
 */
export declare const isPrimitiveString: (str: any) => boolean;
/**
 * Check if the parameter is literal object
 *
 * @param obj
 * @returns {boolean}
 * @example
 * isLiteralObject({})  // true
 * isLiteralObject(0)   // false
 * isLiteralObject('')  // false
 * isLiteralObject(NaN) // false
 * isLiteralObject([])  // false
 * isLiteralObject(new Date())        // false. It's instanceof Date.
 * isLiteralObject(new Map())         // false. It's instanceof Map.
 * isLiteralObject(new Object(''))    // false. It's instanceof String.
 * isLiteralObject(new Object(true))  // false. It's instanceof Boolean.
 * isLiteralObject(() => {}))         // false. It's instanceof Function.
 * isLiteralObject(new Object())      // true.  It's equivelent to objects with JSON literal notation
 */
export declare const isLiteralObject: (obj: any) => boolean;
/**
 * Check if the parameter is primitive boolean
 *
 * @example
 * isPrimitiveBoolean(true);      // true
 * isPrimitiveBoolean(false);     // true
 * isPrimitiveBoolean(0);         // false
 * isPrimitiveBoolean(NaN);       // false
 * isPrimitiveBoolean(undefined); // false
 * isPrimitiveBoolean(null);      // false
 */
export declare const isPrimitiveBoolean: (bool: boolean) => boolean;
/**
 * Check if the parameter is primitive number
 *
 * @example
 * isPrimitivNumber(0);         // true
 * isPrimitivNumber(true);      // false
 * isPrimitivNumber(false);     // false
 * isPrimitivNumber(NaN);       // false
 * isPrimitivNumber(undefined); // false
 * isPrimitivNumber(null);      // false
 */
export declare const isPrimitiveNumber: (num: number) => boolean;
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