import { Model, ModelProperty, Program, Value } from "@typespec/compiler";
export interface MergePatchPropertyOverrides {
    optional?: boolean;
    erasable?: boolean;
    updateBehavior?: "merge" | "replace";
}
export declare const getMergePatchSource: (program: Program, type: Model) => Model | undefined, setMergePatchSource: (program: Program, type: Model, value: Model) => void;
export declare const getMergePatchPropertySource: (program: Program, type: ModelProperty) => ModelProperty | undefined, setMergePatchPropertySource: (program: Program, type: ModelProperty, value: ModelProperty) => void;
export declare const getMergePatchPropertyOverrides: (program: Program, type: ModelProperty) => MergePatchPropertyOverrides | undefined, setMergePatchPropertyOverrides: (program: Program, type: ModelProperty, value: MergePatchPropertyOverrides) => void;
/**
 * Determines if the given model is part of a mergePatch transform
 * @param program The compiled TypeSpec program
 * @param model The model to check
 * @returns true if the model was generated using a mergePatch template, otherwise false
 */
export declare function isMergePatch(program: Program, model: Model): boolean;
/** The characteristics of the property as part of a mergePatch request body */
export interface MergePatchProperties {
    /** Can the property accept null */
    erasable: boolean;
    /** How does the property update the corresponding resource property */
    updateBehavior: "merge" | "replace";
    /** If this property is null, what will the corresponding value of the resource be set to (undefined if the resource property has no default) */
    erasedValue?: Value;
    /** The sourceProperty of this property */
    sourceProperty?: ModelProperty;
}
/**
 * Returns the MergePatch characteristics of the property, if the property is used in a MergePatch request
 * @param program The compiled TypeSpec program
 * @param property The model property to check
 * @returns The characteristics of the property in a MergePatch request (or undefined if the property is not part of a mErgePatch request)
 */
export declare function getMergePatchProperties(program: Program, property: ModelProperty): MergePatchProperties | undefined;
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