The Wolfram Language makes it easy to "bulletproof" packages, and prevent features of their environment from affecting their internal operation.

Localizing Variables »

Module — localize names of variables

Namespace Bulletproofing

BeginPackage — isolate names by declaring a separate context for package functions

Begin — isolate names in the implementation of a package

Symbol Protection

Protect — protect a symbol against redefinition

ReadProtected — protect against definitions being read

Locked — attribute to prevent protection from being changed

Evaluation Bulletproofing

Block — block out changes to system or other variables

BlockRandom — block out reseeding of pseudorandom generators

CheckAbort  ▪  TimeConstrained  ▪  MemoryConstrained  ▪  PropagateAborts

Error & Exception Handling

Confirm — confirm that evaluation of an expression does not generate a failure

Enclose — catch errors detected by Confirm, etc.

ConfirmBy  ▪  ConfirmMatch  ▪  ConfirmQuiet  ▪  ConfirmAssert

Failsafe — create a version of a function protected against bad input

Assert — abort if an assertion fails

Evaluation State Bulletproofing

WithCleanup — run cleanup code even if an evaluation is aborted

AbortProtect — protect the evaluation of an expression from aborts

Function Bulletproofing

CheckArguments — issue messages for incorrect arguments or options

ArgumentsOptions — separate arguments and options for a function

Version Compatibility

$VersionNumber — Wolfram System version number for comparisons

$SystemID — short description of computer system

Notebook Interface Bulletproofing

Deploy  ▪  Selectable  ▪  Editable  ▪  Visible  ▪  CellContext