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## Summary of the Pull Request This PR continues the tradition of alphabetical progress. After [MBGA](#41961), we move on to **MCBA — Make Calculator Better Again!** - Introduces limited automatic correction and completion of expressions. - The goal is to allow uninterrupted typing and avoid disruptions when a partially entered expression is temporarily invalid (which previously caused the result to be replaced by an error message or hidden by the fallback). - The implementation intentionally aims for a sweet spot: - Ignores trailing binary operators. - Automatically closes all opened parentheses. - It is not exhaustive; for example, incomplete constants or functions may still result in an invalid query. - Copy current result to the search bar. - Adds an option to copy the current result to the search bar when the user types `=` at the end of the expression. - Adds a new menu item for the same action. - Fixes the **Save** command to also copy the result to the query. - Adds support for the `factorial(x)` function and the `x!` expression. - Factorial calculations are supported up to `170!` (limited by `double`), but display is constrained by decimal conversion and allows direct display of results up to `20!`. - Adds support for the `sign(x)` function. - Adds support for the `π` symbol as an alternative to the `pi` constant. - Adds a context menu item to the result list item and fallback that displays the octal representation of the result. - Implements beautification of the query: - Converts technical symbols such as `*` or `/` to `×` or `÷`, respectively. - Not enabled for fallbacks for now, since the item text should match the query to keep the score intact. - Implements additional normalization of symbols in the query: - Percent: `％`, `%`, `﹪` - Minus: `−`, `-`, `–`, `—` - Factorial: `！`, `!` - Multiplication: `*`, `×`, `∗`, `·`, `⋅`, `✕`, `✖`, `\u2062` (invisible times) - Division: `/`, `÷`, `➗`, `:` - Allows use of `²` and `³` as alternatives to `^2` and `^3`. - Updates the unit test that was culture sensitive to force en-US output (not an actual fix, but at least it clears false positive for now) - Fixes pre-parsing of scientific notation to prevent capturing minus sign as part of it. - Fixes normalization/rounding of the result, so it can display small values (the current solution turned it into a string with scientific notation and couldn't parse it back). - Updates test with new cases ## Pictures? Moving! Previous behavior: https://github.com/user-attachments/assets/ebcdcd85-797a-44f9-a8b1-a0f2f33c6b42 New behavior: https://github.com/user-attachments/assets/5bd94663-a0d0-4d7d-8032-1030e79926c3 <!-- Please review the items on the PR checklist before submitting--> ## PR Checklist - [x] Closes: #43481 - [x] Closes: #43460 - [x] Closes: #42078 - [x] Closes: #41839 - [x] Closes: #39659 - [x] Closes: #40502 - [x] Related to: #41715 <!-- - [ ] Closes: #yyy (add separate lines for additional resolved issues) --> - [ ] **Communication:** I've discussed this with core contributors already. If the work hasn't been agreed, this work might be rejected - [x] **Tests:** Added/updated and all pass - [ ] **Localization:** All end-user-facing strings can be localized - [ ] **Dev docs:** Added/updated - [ ] **New binaries:** Added on the required places - [ ] [JSON for signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json) for new binaries - [ ] [WXS for installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs) for new binaries and localization folder - [ ] [YML for CI pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml) for new test projects - [ ] [YML for signed pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml) - [ ] **Documentation updated:** If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys) and link it here: #xxx <!-- Provide a more detailed description of the PR, other things fixed, or any additional comments/features here --> ## Detailed Description of the Pull Request / Additional comments <!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well --> ## Validation Steps Performed
C++/WinRT CalculatorEngine Project Overview
This project wraps the exprtk expression parsing library with a C++/WinRT component,
making advanced mathematical evaluation capabilities available to Windows applications.
It is designed specifically to provide calculation support for the CmdPal calculator extension.
Using exprtk
This project uses exprtk as the expression parsing and evaluation engine.
How to use exprtk in this project:
-
The exprtk header file (
exprtk.hpp) is included in the project source. -
You can use exprtk to parse and evaluate mathematical expressions in your C++ code. For example:
#include "exprtk.hpp" exprtk::expression<double> expression; exprtk::parser<double> parser; std::string formula = "3 + 4 * 2"; parser.compile(formula, expression); double result = expression.value();
How to update exprtk:
- Download the latest
exprtk.hppfrom the official repository. - Replace the existing
exprtk.hppfile in the project with the new version. - Rebuild the project to ensure compatibility and take advantage of any updates.