/**
 * Pattern lowering for local declarations (AST-only).
 *
 * Handles destructuring for local variable declarations:
 * - identifier patterns
 * - array patterns (including tuple lowering)
 * - object patterns
 *
 * Also exports shared helpers used by static and assignment lowering.
 */
import { IrExpression, IrPattern, IrType } from "@tsonic/frontend";
import { EmitterContext } from "../emitter-types/index.js";
import type { CSharpExpressionAst, CSharpStatementAst, CSharpTypeAst } from "../core/format/backend-ast/types.js";
export declare const objectTypeAst: CSharpTypeAst;
export declare const tupleElementMemberName: (index: number) => string;
export declare const emitTupleElementAccessAst: (inputExpr: CSharpExpressionAst, index: number) => CSharpExpressionAst;
export declare const emitTupleRestArrayAst: (inputExpr: CSharpExpressionAst, tupleType: Extract<IrType, {
    kind: "tupleType";
}>, startIndex: number) => CSharpExpressionAst;
export declare const generateTemp: (prefix: string, ctx: EmitterContext) => [string, EmitterContext];
export declare const emitDefaultExprAst: (expr: IrExpression, ctx: EmitterContext) => [CSharpExpressionAst, EmitterContext];
export type LoweringResultAst = {
    readonly statements: readonly CSharpStatementAst[];
    readonly context: EmitterContext;
};
export declare const lowerPatternAst: (pattern: IrPattern, inputExpr: CSharpExpressionAst, type: IrType | undefined, ctx: EmitterContext) => LoweringResultAst;
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