/**
 * Type alias declaration emission — returns CSharpTypeDeclarationAst | null
 */
import { IrStatement } from "@tsonic/frontend";
import { EmitterContext } from "../../types.js";
import type { CSharpTypeDeclarationAst } from "../../core/format/backend-ast/types.js";
/**
 * Emit a type alias declaration as CSharpTypeDeclarationAst | null.
 *
 * Returns null for non-structural aliases (type-only, erased in C#). For structural (object) type aliases,
 * returns a sealed class or struct declaration.
 */
export declare const emitTypeAliasDeclaration: (stmt: Extract<IrStatement, {
    kind: "typeAliasDeclaration";
}>, context: EmitterContext) => [CSharpTypeDeclarationAst | null, EmitterContext];
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