import type { $ZodDiscriminatedUnion, $ZodUnion } from 'zod/v4/core';
import type { FormField, FormProcessorContext, ProcessParams } from '../types.js';
/**
 * Process `z.union()` — renders as a `Select` when all options are literals,
 * or delegates to `processDiscriminatedUnion` when a discriminator property is detected.
 * Falls back to a plain `Input` for mixed unions.
 *
 * @param schema - The `$ZodUnion` schema to process.
 * @param ctx - The walker context (used by discriminated union delegation).
 * @param field - The base FormField to mutate in-place.
 * @param params - Parent path metadata for discriminated union child keys.
 *
 * @remarks
 * Discriminated unions have `def.type === "union"` in Zod v4 — they are detected
 * by the presence of a `discriminator` property in the def. This processor handles both.
 *
 * @category Processors
 */
export declare function processUnion(schema: $ZodUnion, ctx: FormProcessorContext, field: FormField, params: ProcessParams): void;
/**
 * Process `z.discriminatedUnion()` — renders as a `Select` for the discriminator field,
 * with variant child fields stored in `field.props._variants` for runtime conditional rendering.
 * The runtime `DiscriminatedUnionBlock` and codegen both read `_discriminator` and `_variants`.
 *
 * @param schema - The `$ZodDiscriminatedUnion` schema to process.
 * @param ctx - The walker context providing child processing for variant shape entries.
 * @param field - The base FormField to mutate in-place.
 * @param params - Parent path metadata for constructing variant child field keys.
 *
 * @remarks
 * The discriminator select options are derived from the literal values in each variant's
 * discriminator field. Variant child fields (excluding the discriminator key) are pre-processed
 * and stored keyed by their discriminator value string.
 *
 * @category Processors
 */
export declare function processDiscriminatedUnion(schema: $ZodDiscriminatedUnion, ctx: FormProcessorContext, field: FormField, params: ProcessParams): void;
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