Function statementToFunction

src/common/sourceCodeManipulations.ts:204–224

* statement => function () { catchAndReturnErrors(return statement); } * statement; statement => function () { catchAndReturnErrors(statement; return statement); }

(
  parameterNames: ReadonlyArray<string>,
  statements: ReadonlyArray<Statement>,
  preserveThis: boolean,
  catchAndReturnErrors: boolean,
)

 * statement; statement => function () { catchAndReturnErrors(statement; return statement); }
 */
function statementToFunction(
  parameterNames: ReadonlyArray<string>,
  statements: ReadonlyArray<Statement>,
  preserveThis: boolean,
  catchAndReturnErrors: boolean,
) {
  const last = statements[statements.length - 1];
  if (last.type !== 'ReturnStatement') {
    const expr = statementToExpression(last);
    if (expr) {
      statements = [...statements.slice(0, -1), { type: 'ReturnStatement', argument: expr }];
    }
  }

  return codeToFunctionExecutingCode(
    parameterNames,
    statements,
    preserveThis,
    catchAndReturnErrors,
  );
}

export function statementToExpression(stmt: Statement): Expression | undefined {
  switch (stmt.type) {