JarCastingjom
jom is a Kotlin/JVM parser combinator library. It is heavily inspired by the great Rust library nom.
Installation
Add a dependency to jom. Have a look at the GitHub Releases for the most recent version.
Gradle
repositories {
mavenCentral()
}
dependencies {
implementation("io.yegair.jom:jom:$jomVersion")
}
Maven
<dependency>
<groupId>io.yegair.jom</groupId>
<artifactId>jom</artifactId>
<version>${jom.version}</version>
</dependency>
Write a Parser
For more detailed examples have a look at the docs.
val camelCase =
// map applies a single parser and then maps its output
// by applying a custom function
map(
// pair applies two parsers in sequence and returns
// their result as a Kotlin Pair
pair(
// satisfy1 reads one or more UTF-8 code points that match
// a given predicate and returns a string containing all
// matched code points
satisfy1 { cp, _ -> cp.isLowerCase() },
// many0 applies a parser zero or more times until it no longer matches
// it then returns a list containing all results in order
many0(
// the second parameter given to satisfy1 is the index
// of the codepoint within the current parser invocation
satisfy1 { cp, index ->
when (index) {
0 -> cp.isUpperCase()
else -> cp.isLowerCase()
}
}
)
)
) { (first, rest) ->
// first is the result of the first satisfy1 parser
// rest is the result of the many0 parser
listOf(first) + rest
}