Module core 

Core calculator module with 100% test coverage

Probar Principles:

• Error prevention: Type-safe operations prevent invalid states
• Anomaly: Automatic anomaly detection

Modules

evaluator

AST evaluator with 100% test coverage

history

Calculation history with 100% test coverage

parser

Expression parser with 100% test coverage

Structs

AnomalyValidator

Anomaly validator - automatic anomaly detection by Probar

Calculator

Core calculator implementing all arithmetic operations

Enums

AnomalyViolation

Anomaly violation types - anomalies detected during calculation

CalcError

Calculator error types - exhaustive enum ensures all cases handled

Operation

Type-safe operation enum - compile-time guarantee of valid operations

Type Aliases

CalcResult

Result type for calculator operations