import { Alias, AnyType, BaseVisitor, Context, Enum, Type, Union, Field, Writer } from "@apexlang/core/model";
import { Import } from "./alias_visitor.js";
export declare type NamedType = Alias | Type | Union | Enum;
export declare class GRPCVisitor extends BaseVisitor {
    private input;
    private output;
    private aliases;
    visitNamespaceBefore(context: Context): void;
    visitInterfaceBefore(context: Context): void;
    visitOperation(context: Context): void;
    visitNamespaceAfter(context: Context): void;
    writeOutputType(t: Type): void;
    writeOutputUnion(union: Union): void;
    writeInputType(t: Type): void;
    writeInput(f: Field, from: string, allowPtr: boolean): string;
    writeInputField(f: Field): void;
    writeInputUnion(union: Union): void;
}
export declare class InputOutputVisitor extends BaseVisitor {
    imports: Set<string>;
    input: {
        [name: string]: NamedType;
    };
    output: {
        [name: string]: NamedType;
    };
    private aliases;
    constructor(writer: Writer, aliases: {
        [key: string]: Import;
    });
    visitOperation(context: Context): void;
    visitParameter(context: Context): void;
    checkSingleType(a: AnyType): void;
    checkType(context: Context, a: AnyType, m: {
        [name: string]: AnyType;
    }, types?: Set<string>): void;
}
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