import { FormulaBinaryExpression, FormulaFunctionExp } from './api/api-models';
export declare function isFormulaFunction(value: any): value is FormulaFunctionExp;
/**
 * Parses the quoted body of a `FORMULA()` call into a nested AST.
 * Returns `undefined` when the source does not match the supported grammar (two field references joined by `+` or `-`)
 * so the caller can report the error through the parser's normal error handling.
 */
export declare function parseFormulaExpression(source: string): FormulaBinaryExpression | undefined;
/**
 * Renders a formula AST back to its normalized source form, e.g. `Amount - ExpectedRevenue`.
 * Used by the composer and to populate `parameters` when parsing.
 * Throws when a hand-built AST does not describe two field references joined by `+` or `-`,
 * so a malformed formula never composes to invalid SOQL silently.
 */
export declare function renderFormulaExpression(formula: FormulaBinaryExpression): string;