https://github.com/stevencyb/goeval

A GoLang library for simple expression evaluation.
https://github.com/stevencyb/goeval

Last synced: 7 days ago
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A GoLang library for simple expression evaluation.

• Host: GitHub
• URL: https://github.com/stevencyb/goeval
• Owner: StevenCyb
• License: mit
• Created: 2024-04-09T08:23:26.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-04-10T09:54:39.000Z (over 1 year ago)
• Last Synced: 2024-04-10T11:36:28.828Z (over 1 year ago)
• Language: Go
• Homepage:
• Size: 7.81 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# goeval

A GoLang library for simple expression evaluation.

```go

expr.Eval("true  && true") # true 

expr.Eval("2+3")   # 5 

expr.Eval("1+3>3") # true 

expr.Eval("('fo'!='bar')&&(2!=3)") # true 

```

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## Logical Operation

Supported logical operations are `&&` and `||`.

* On text, `"true"` or `'true'` (case insensitive) is `true`, else `false`

* On numbers greater zero is `true`, else `false`

## Comparison Operation

Supported comparisons are `==`, `!=`, `<`, `>`, `<=` or `>=`.

While equal and not equal directly uses the value. Greater(equal) and smaller(equal) will behave different:

* On boolean a `0` and `1` is used (`true>0` = `true`, `false>0` = `false`).

* On text the length is used (`"hello">"hey"` = `true`).

## Arithmetic Operation

Supported arithmetics are `+`, `-`, `*`, `/` and `%`.

* On boolean a `0` and `1` is used (`true+0` = `1`, `false+0` = `0`).

* On text the length is used (`"foo"+"bar"` = `6`).

## Context

Context can be used to group a part of the expression to prioritize the evaluation.