Add support for providing modules written in SMNP language (LanguageModuleProvider extension class)

app/src/main/kotlin/io/smnp/interpreter/DefaultInterpreter.kt

@@ -8,7 +8,7 @@ import io.smnp.evaluation.evaluator.RootEvaluator
 import io.smnp.evaluation.model.enumeration.EvaluationResult
 import java.io.File
 
-class Interpreter {
+class DefaultInterpreter : Interpreter {
     private val tokenizer = DefaultTokenizer()
     private val parser = RootParser()
     private val evaluator = RootEvaluator()
@@ -46,4 +46,6 @@ class Interpreter {
         val lines = file.readLines()
         run(lines, printTokens, printAst, dryRun)
     }
+
+    override fun run(code: String) = run(code, printTokens = false, printAst = false, dryRun = false)
 }

app/src/main/kotlin/io/smnp/interpreter/LanguageModuleInterpreter.kt

@@ -0,0 +1,47 @@
+package io.smnp.interpreter
+
+import io.smnp.dsl.ast.parser.RootParser
+import io.smnp.dsl.token.tokenizer.DefaultTokenizer
+import io.smnp.environment.DefaultEnvironment
+import io.smnp.environment.Environment
+import io.smnp.evaluation.evaluator.Evaluator
+import io.smnp.evaluation.evaluator.ExtendEvaluator
+import io.smnp.evaluation.evaluator.FunctionDefinitionEvaluator
+import io.smnp.evaluation.model.enumeration.EvaluationResult
+import io.smnp.type.module.Module
+
+class LanguageModuleInterpreter : Interpreter {
+   private var rootModule = Module.create("<root>")
+   private val tokenizer = DefaultTokenizer()
+   private val parser = RootParser()
+   private val evaluator = Evaluator.repeat(
+      Evaluator.assert(Evaluator.oneOf(
+         FunctionDefinitionEvaluator(),
+         ExtendEvaluator()
+      ), "function definition or extend statement")
+   )
+
+   override fun updateRootModule(newRootModule: Module) {
+      rootModule = newRootModule
+   }
+
+   override fun run(code: String) {
+      val lines = code.split("\n")
+      val tokens = tokenizer.tokenize(lines)
+      val ast = parser.parse(tokens)
+
+      val environment = createEnvironment()
+      val result = evaluator.evaluate(ast.node, environment)
+
+      if (result.result == EvaluationResult.FAILED) {
+         throw RuntimeException("Evaluation failed")
+      }
+   }
+
+   private fun createEnvironment(): Environment {
+      val environment = DefaultEnvironment(rootModule)
+      environment.loadModule("smnp.lang")
+
+      return environment
+   }
+}