import { VisitorDataType, CompoundField, FieldNode, FieldByType, PrimitiveField, RecordField, TupleField, VariantField } from "./types.js";
/**
 * Type guard for checking specific field types.
 *
 * @example
 * ```tsx
 * function FieldInput({ field }: { field: FieldNode }) {
 *   if (isFieldType(field, 'record')) {
 *     // field is now typed as RecordField
 *     return <RecordInput field={field} />
 *   }
 *   if (isFieldType(field, 'text')) {
 *     // field is now typed as TextField
 *     return <TextInput field={field} />
 *   }
 *   // ...
 * }
 * ```
 */
export declare function isFieldType<T extends VisitorDataType>(field: FieldNode, type: T): field is FieldByType<T>;
/**
 * Check if a field is a compound type (contains other fields).
 * Compound types: record, variant, tuple, optional, vector, recursive
 */
export declare function isCompoundField(field: FieldNode): field is CompoundField;
/**
 * Check if a field is a primitive type.
 * Primitive types: principal, number, text, boolean, null
 */
export declare function isPrimitiveField(field: FieldNode): field is PrimitiveField;
/**
 * Check if a field has child fields array (for iteration).
 * Applies to: record (fields), tuple (fields)
 */
export declare function hasChildFields(field: FieldNode): field is RecordField | TupleField;
/**
 * Check if a field has variant options (for iteration).
 * Applies to: variant (options)
 */
export declare function hasOptions(field: FieldNode): field is VariantField;
/**
 * Format a raw Candid label into a human-readable display label.
 * Handles common patterns like "__arg0", "_0_", "snake_case", etc.
 *
 * @example
 * ```ts
 * formatLabel("__arg0")        // "Arg 0"
 * formatLabel("_0_")           // "Item 0"
 * formatLabel("created_at")    // "Created At"
 * formatLabel("userAddress")   // "User Address"
 * formatLabel("__ret0")        // "Result 0"
 * ```
 */
export declare function formatLabel(label: string): string;
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