import type { ValidationSchemaPluginConfig } from './config.js';
import type { Visitor } from './visitor.js';
/**
 * Builds a library-specific scalar schema expression.
 *
 * All five validation libraries follow the same pattern: check for a custom
 * `scalarSchemas` override, fall back to a built-in type map for the resolved
 * TypeScript type (string/number/boolean), then apply `defaultScalarTypeSchema`,
 * and finally warn and return the library fallback.
 *
 * The only per-library differences are the strings in `typeMap`, the `fallback`
 * value, and whether custom schemas need wrapping (yup appends `.defined()`).
 */
export declare function buildScalarSchema(config: ValidationSchemaPluginConfig, visitor: Visitor, scalarName: string, options: {
    typeMap: Record<'string' | 'number' | 'boolean', string>;
    fallback: string;
    wrapCustom?: (schema: string) => string;
}): string;