Migrate function definition parser to Kotlin

src/main/kotlin/dsl/ast/model/node/FunctionDefinitionArgumentsNode.kt

@@ -0,0 +1,5 @@
+package dsl.ast.model.node
+
+import dsl.token.model.entity.TokenPosition
+
+class FunctionDefinitionArgumentsNode(items: List<Node>, position: TokenPosition) : AbstractIterableNode(items, position)

src/main/kotlin/dsl/ast/model/node/FunctionDefinitionNode.kt

@@ -0,0 +1,20 @@
+package dsl.ast.model.node
+
+import dsl.token.model.entity.TokenPosition
+
+class FunctionDefinitionNode(identifier: Node, arguments: Node, body: Node, position: TokenPosition) : Node(3, position) {
+    val identifier: Node
+    get() = children[0]
+
+    val arguments: Node
+    get() = children[1]
+
+    val body: Node
+    get() = children[2]
+
+    init {
+        children[0] = identifier
+        children[1] = arguments
+        children[2] = body
+    }
+}

src/main/kotlin/dsl/ast/parser/FunctionDefinitionArgumentParser.kt

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+package dsl.ast.parser
+
+import dsl.ast.model.entity.ParserOutput
+import dsl.token.model.entity.TokenList
+
+class FunctionDefinitionArgumentParser : Parser() {
+    override fun tryToParse(input: TokenList): ParserOutput {
+        return oneOf(listOf(
+            OptionalFunctionDefinitionArgumentParser(),
+            RegularFunctionDefinitionArgumentParser()
+        )).parse(input)
+    }
+}

src/main/kotlin/dsl/ast/parser/FunctionDefinitionArgumentsParser.kt

@@ -0,0 +1,8 @@
+package dsl.ast.parser
+
+import dsl.ast.model.node.FunctionDefinitionArgumentsNode
+import dsl.token.model.enumeration.TokenType
+
+class FunctionDefinitionArgumentsParser : AbstractIterableParser(TokenType.OPEN_PAREN, FunctionDefinitionArgumentParser(), TokenType.CLOSE_PAREN, {
+    list, tokenPosition -> FunctionDefinitionArgumentsNode(list,  tokenPosition)
+})

src/main/kotlin/dsl/ast/parser/FunctionDefinitionParser.kt

@@ -0,0 +1,19 @@
+package dsl.ast.parser
+
+import dsl.ast.model.entity.ParserOutput
+import dsl.ast.model.node.FunctionDefinitionNode
+import dsl.token.model.entity.TokenList
+import dsl.token.model.enumeration.TokenType
+
+class FunctionDefinitionParser : Parser() {
+    override fun tryToParse(input: TokenList): ParserOutput {
+        return allOf(listOf(
+            terminal(TokenType.FUNCTION),
+            assert(SimpleIdentifierParser(), "function/method name"),
+            assert(FunctionDefinitionArgumentsParser(), "function/method arguments list"),
+            assert(BlockParser(), "function/method body")
+        )) {
+            FunctionDefinitionNode(it[1], it[2], it[3], it[0].position)
+        }.parse(input)
+    }
+}