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add warning or error when using bigint with floating point types

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#1,991 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
csharp, powershell
Domain
tooling

Research direction

No file, test, or entry point is named. Start by locating the analyzer rule or type-checking entry point for arithmetic expressions, then reproduce the two examples from the issue; done means bigint combined with floating-point addition or multiplication receives a warning or error instead of silently producing the shown incorrect results.

Written by the indexing model from the issue text.

Description

Issue - New Rule Up-for-Grabs

Summary of the new feature

When you use bigint and add or multiply a floating point number, the result is wrong.
I discussed it with the PowerShell team but they don't want to fix it.
https://github.com/PowerShell/PowerShell/issues/21341

[double]$r = [bigint]5 * [double]1.5
Write-Host "bigint: $r"
The result is "bigint: 5"

[double]$r = [bigint]5 + [double]1.5
Write-Host "bigint: $r"
The result is "bigint: 6"

What is the latest version of PSScriptAnalyzer at the point of writing
1.22.0

Dominant language
C#
Stars
2.2k
Forks
415
Avg merge
13h 1m
Merged PRs (30d)
2

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