calkt
0.0.5indexedSupports parsing and calculating various expressions, offering extensible parsers and modules for math and unit conversions. Enables custom operators and unit calculations.
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Supports parsing and calculating various expressions, offering extensible parsers and modules for math and unit conversions. Enables custom operators and unit calculations.
Calkt is a Kotlin library that supports parsing and calculating various expressions. Parser is written in a way to have an ability to be extended.
The result of running example/Main.kt:
Enter math expression to calculate: 2 + 2 * 2
Parsed as: 2 plus (2 times 2)
Result: 6
Enter an expression with units to calculate: (1km - 0.5mi) + 2 yd to inches
Parsed as: (((1 Kilometers) minus (0.5 Miles)) plus (2 Yards)).convert(Inches)
Result: 7886.272 Inches
You can get latest version from Releases tab on GitHub.
dependencies {
implementation("me.y9san9.calkt:units:$version")
}
The library consists of several different modules:
Module with all basic types for parsing and calculating. Here
you can find ParseContext and CalculateContext as well as
functions to launch parsers/calculators.
Module with implementation of basic math expressions that any
calculator can calculate. This is where you can find logic to
calculate numbers combined with basic supported operators (
+, -, *, /). You can implement your own operator, like
in this example (% operator).
Module with implementation of math expressions with units. It
depends on math module heavily and does not do any calculations
on its own. There is a logic to support calculation and
conversions of units like 1 km + 2, 1km to inches, etc.
Module with all the examples you need to know. If something is missing, PRs are welcome.
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