import { ElementAccessExpr, Expr, ParameterDecl, PropAccessExpr, Stmt, VariableStmt } from "@functionless/ast";
/**
 * Returns a string array representing the property access starting from a named identity.
 *
 * Does not return the identity name given.
 *
 * (event) => {
 *   event.prop1.prop2
 * }
 *
 * Given the PropertyAccessExpr for "prop2", this function will return ["prop1", "prop2"];
 */
export declare const getReferencePath: (expression: Expr) => ReferencePath | undefined;
export declare const getPropertyAccessKeyFlatten: (expr: PropAccessExpr | ElementAccessExpr, scope: EventScope) => string | number;
/**
 * Normalize retrieving the name of a property between a element access and property access expression.
 */
export declare const getPropertyAccessKey: (expr: PropAccessExpr | ElementAccessExpr) => string | number;
export interface ReferencePath {
    identity: string;
    reference: (string | number)[];
}
export declare const isReferencePath: (x: any) => x is ReferencePath;
export interface EventScope {
    [key: string]: Expr | undefined;
}
/**
 * Attempts to remove references by flattening constant references and replaces local variables with properties.
 * Updates expressions in place to avoid new AST types.
 *
 * const val = "sam"
 * return val + " is cool"
 *
 * Becomes return "sam" + "is cool"
 *
 * const obj = { val: "hi" }
 * return obj.val + " there"
 *
 * Becomes return "hi" + " there"
 *
 * Also does some optimization like turning templated strings of all constants into a string constant.
 */
export declare const flattenExpression: (expr: Expr, scope: EventScope) => Expr;
export declare const flattenStatementsScope: (stmts: VariableStmt[]) => Record<string, Expr | undefined>;
export declare type EventReference = ReferencePath & {
    reference: [string] | ["detail", ...string[]];
};
export declare function assertValidEventReference(eventReference?: ReferencePath, eventName?: ParameterDecl, utilsName?: ParameterDecl): asserts eventReference is EventReference;
export declare const flattenReturnEvent: (stmts: Stmt[]) => Expr;
export declare const deploymentOnlyModule = true;
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