fix: 'else if' is now lowered into an else > if > else

Cargo.toml

@@ -52,6 +52,7 @@ project = { path = "./compiler/plc_project/", package = "plc_project", features
 ] }
 plc_xml = { path = "./compiler/plc_xml" }
 test_utils = { path = "./tests/test_utils" }
+plc_lowering = { path = "./compiler/plc_lowering" }
 serial_test = "*"
 tempfile = "3"
 encoding_rs.workspace = true

compiler/plc_ast/src/ser.rs

@@ -317,9 +317,13 @@ impl AstVisitor for AstSerializer {
         child.walk(self)
     }
 
-    fn visit_exit_statement(&mut self, _node: &AstNode) {}
+    fn visit_exit_statement(&mut self, _node: &AstNode) {
+        self.result.push_str("EXIT;");
+    }
 
-    fn visit_continue_statement(&mut self, _node: &AstNode) {}
+    fn visit_continue_statement(&mut self, _node: &AstNode) {
+        self.result.push_str("CONTINUE;");
+    }
 
     fn visit_return_statement(&mut self, stmt: &ReturnStatement, _node: &AstNode) {
         stmt.walk(self)

compiler/plc_driver/src/pipelines.rs

@@ -42,7 +42,10 @@ use plc_header_generator::{
     GenerateHeaderOptions,
 };
 use plc_index::GlobalContext;
-use plc_lowering::{inheritance::InheritanceLowerer, retain::RetainParticipant};
+use plc_lowering::{
+    control_statement::ControlStatementParticipant, inheritance::InheritanceLowerer,
+    retain::RetainParticipant,
+};
 use project::{
     object::Object,
     project::{LibraryInformation, Project},
@@ -300,6 +303,7 @@ impl<T: SourceContainer> BuildPipeline<T> {
                 self.context.provider(),
                 self.context.should_generate_external_constructors(),
             )),
+            Box::new(ControlStatementParticipant::new(self.context.provider())),
             Box::new(PropertyLowerer::new(self.context.provider())),
             Box::new(RetainParticipant::new(self.context.provider())),
             Box::new(AggregateTypeLowerer::new(self.context.provider())),

compiler/plc_driver/src/pipelines/participant.rs

@@ -22,7 +22,10 @@ use plc::{
 use plc_diagnostics::diagnostics::Diagnostic;
 use plc_lowering::{
     retain::RetainParticipant,
-    {inheritance::InheritanceLowerer, initializer::Initializer},
+    {
+        control_statement::ControlStatementParticipant, inheritance::InheritanceLowerer,
+        initializer::Initializer,
+    },
 };
 use project::{object::Object, project::LibraryInformation};
 use source_code::SourceContainer;
@@ -319,3 +322,11 @@ impl PipelineParticipantMut for RetainParticipant {
         project.index(self.ids.clone())
     }
 }
+
+impl PipelineParticipantMut for ControlStatementParticipant {
+    fn pre_index(&mut self, parsed_project: ParsedProject) -> ParsedProject {
+        let ParsedProject { mut units } = parsed_project;
+        self.lower_control_statements(&mut units);
+        ParsedProject { units }
+    }
+}