add_lollipop_relation

plantuml/parser/integration_test/component_diagram/relation_invalid_arrow_parsed_as_association/relation_invalid_arrow_parsed_as_association.puml → plantuml/parser/integration_test/component_diagram/invalid_component_left_inverse_generic_lollipop/invalid_component_left_inverse_generic_lollipop.puml

@@ -10,13 +10,13 @@
 '
 ' SPDX-License-Identifier: Apache-2.0
 ' *******************************************************************************
-@startuml
+@startuml invalid_component_left_inverse_generic_lollipop.puml
 
 package "Pkg" as Pkg {
     component "Component A" as ComponentA <<component>>
     interface "IService" as IService
 
-    ComponentA --() IService : association
+    ComponentA ()-- IService : invalid
 }
 
 @enduml

plantuml/parser/integration_test/component_diagram/invalid_component_left_inverse_generic_lollipop/output.yaml

@@ -0,0 +1,19 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+invalid_component_left_inverse_generic_lollipop.puml:
+  error:
+    type: "InvalidRelationship"
+    fields:
+      from: "ComponentA"
+      to: "IService"
+      reason: "Unsupported interface decorator syntax: only ')-' and '--()' (Provided) plus '-(' (Required) are supported; '()--' is rejected"

plantuml/parser/integration_test/component_diagram/invalid_interface_decor_between_components/output.yaml

@@ -16,4 +16,4 @@ invalid_interface_decor_between_components.puml:
     fields:
       from: "A"
       to: "B"
-      reason: "Interface decorators '-(' and ')-' require exactly one Interface endpoint"
+      reason: "Interface decorators '-(', ')-', and '--()' require exactly one Interface endpoint"

plantuml/parser/integration_test/component_diagram/invalid_interface_decor_between_interfaces/output.yaml

@@ -16,4 +16,4 @@ invalid_interface_decor_between_interfaces.puml:
     fields:
       from: "ILeft"
       to: "IRight"
-      reason: "Interface decorators '-(' and ')-' are not allowed between two interfaces"
+      reason: "Interface decorators '-(', ')-', and '--()' are not allowed between two interfaces"

plantuml/parser/integration_test/component_diagram/invalid_interface_left_generic_lollipop/invalid_interface_left_generic_lollipop.puml

@@ -0,0 +1,22 @@
+' *******************************************************************************
+' Copyright (c) 2026 Contributors to the Eclipse Foundation
+'
+' See the NOTICE file(s) distributed with this work for additional
+' information regarding copyright ownership.
+'
+' This program and the accompanying materials are made available under the
+' terms of the Apache License Version 2.0 which is available at
+' https://www.apache.org/licenses/LICENSE-2.0
+'
+' SPDX-License-Identifier: Apache-2.0
+' *******************************************************************************
+@startuml invalid_interface_left_generic_lollipop.puml
+
+package "Pkg" as Pkg {
+    interface "IProvided" as IProvided
+    component "A" as A <<component>>
+
+    IProvided --() A : invalid
+}
+
+@enduml

plantuml/parser/integration_test/component_diagram/invalid_interface_left_generic_lollipop/output.yaml

@@ -0,0 +1,19 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+invalid_interface_left_generic_lollipop.puml:
+  error:
+    type: "InvalidRelationship"
+    fields:
+      from: "IProvided"
+      to: "A"
+      reason: "Decorator binding requires a Component or component-stereotyped element on the left and Interface on the right"

plantuml/parser/integration_test/component_diagram/invalid_interface_left_inverse_generic_lollipop/invalid_interface_left_inverse_generic_lollipop.puml

@@ -0,0 +1,22 @@
+' *******************************************************************************
+' Copyright (c) 2026 Contributors to the Eclipse Foundation
+'
+' See the NOTICE file(s) distributed with this work for additional
+' information regarding copyright ownership.
+'
+' This program and the accompanying materials are made available under the
+' terms of the Apache License Version 2.0 which is available at
+' https://www.apache.org/licenses/LICENSE-2.0
+'
+' SPDX-License-Identifier: Apache-2.0
+' *******************************************************************************
+@startuml invalid_interface_left_inverse_generic_lollipop.puml
+
+package "Pkg" as Pkg {
+    interface "IProvided" as IProvided
+    component "A" as A <<component>>
+
+    IProvided ()-- A : invalid
+}
+
+@enduml

plantuml/parser/integration_test/component_diagram/invalid_interface_left_inverse_generic_lollipop/output.yaml

@@ -0,0 +1,19 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+invalid_interface_left_inverse_generic_lollipop.puml:
+  error:
+    type: "InvalidRelationship"
+    fields:
+      from: "IProvided"
+      to: "A"
+      reason: "Unsupported interface decorator syntax: only ')-' and '--()' (Provided) plus '-(' (Required) are supported; '()--' is rejected"

plantuml/parser/integration_test/component_diagram/invalid_interface_left_required_decorator/invalid_interface_left_required_decorator.puml

@@ -0,0 +1,22 @@
+' *******************************************************************************
+' Copyright (c) 2026 Contributors to the Eclipse Foundation
+'
+' See the NOTICE file(s) distributed with this work for additional
+' information regarding copyright ownership.
+'
+' This program and the accompanying materials are made available under the
+' terms of the Apache License Version 2.0 which is available at
+' https://www.apache.org/licenses/LICENSE-2.0
+'
+' SPDX-License-Identifier: Apache-2.0
+' *******************************************************************************
+@startuml
+
+package "Pkg" as Pkg {
+    interface "IReq" as IReq
+    component "A" as A <<component>>
+
+    IReq -( A : invalid
+}
+
+@enduml

plantuml/parser/integration_test/component_diagram/invalid_interface_left_required_decorator/output.yaml

@@ -0,0 +1,19 @@
+# *******************************************************************************
+# Copyright (c) 2026 Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+# *******************************************************************************
+invalid_interface_left_required_decorator.puml:
+  error:
+    type: "InvalidRelationship"
+    fields:
+      from: "IReq"
+      to: "A"
+      reason: "Decorator binding requires a Component or component-stereotyped element on the left and Interface on the right"

plantuml/parser/integration_test/component_diagram/relation_invalid_arrow_parsed_as_association/output.json → plantuml/parser/integration_test/component_diagram/relation_generic_lollipop_provided_to_component/output.json

@@ -1,5 +1,5 @@
 {
-    "relation_invalid_arrow_parsed_as_association.puml": {
+    "relation_generic_lollipop_provided_to_component.puml": {
         "Pkg.ComponentA": {
             "id": "Pkg.ComponentA",
             "name": "Component A",
@@ -10,9 +10,9 @@
             "relations": [
                 {
                     "target": "Pkg.IService",
-                    "annotation": "association",
-                    "relation_type": "Association",
-                    "source_role": "None",
+                    "annotation": "provides",
+                    "relation_type": "InterfaceBinding",
+                    "source_role": "Provided",
                     "source_location": {
                       "file": "",
                       "line": 19

plantuml/parser/integration_test/component_diagram/relation_generic_lollipop_provided_to_component/relation_generic_lollipop_provided_to_component.puml

@@ -0,0 +1,22 @@
+' *******************************************************************************
+' Copyright (c) 2026 Contributors to the Eclipse Foundation
+'
+' See the NOTICE file(s) distributed with this work for additional
+' information regarding copyright ownership.
+'
+' This program and the accompanying materials are made available under the
+' terms of the Apache License Version 2.0 which is available at
+' https://www.apache.org/licenses/LICENSE-2.0
+'
+' SPDX-License-Identifier: Apache-2.0
+' *******************************************************************************
+@startuml relation_generic_lollipop_provided_to_component.puml
+
+package "Pkg" as Pkg {
+    component "Component A" as ComponentA <<component>>
+    interface "IService" as IService
+
+    ComponentA --() IService : provides
+}
+
+@enduml

plantuml/parser/puml_resolver/src/component_diagram/src/component_relations.md

@@ -26,6 +26,7 @@
 - Interface binding (component-left only):
   - Provided interface:
     - `Component )- Interface`
+    - `Component --() Interface`
   - Required interface:
     - `Component -( Interface`
 
@@ -36,15 +37,19 @@
 The following forms are rejected:
 
 - Interface )- Component
+  - accepted by PlantUML Preview, but rejected by the resolver
 - Interface -( Component
+  - accepted by PlantUML Preview, but rejected by the resolver
+- Interface ()-- Component
+  - invalid in PlantUML Preview and rejected by the resolver
+- Component ()-- Interface
+  - invalid in PlantUML Preview and rejected by the resolver
+- Interface --() Component
+  - accepted by PlantUML Preview, but rejected by the resolver
 
 ### Generic lollipop decorators
 
-The following forms are resolved as plain associations and do not carry interface-binding semantics:
-  - `Component --() Interface`
-  - `Interface ()-- Component`
-
-Note: Use canonical component-left forms such as `Component )- Interface` or `Component -( Interface` when you need interface binding behavior.
+The generic lollipop form `Component --() Interface` is resolved as a provided interface binding.
 
 ### Resolver constraints
 

plantuml/parser/puml_resolver/src/component_diagram/src/component_resolver.rs

@@ -452,14 +452,14 @@ impl ComponentResolver {
     }
 
     // Supported relation syntaxes:
-    // - Interface binding: `)-`, `-(`
+    // - Interface binding: `)-`, `-(`, `--()`
     // - Directed: `-->`, `<--`, `..>`, `<..`
     // - Undirected: `--`, `..`
     fn parse_arrow(relation: &Relation) -> Result<ArrowAnalysis, ComponentResolverError> {
         let (left, right, middle) = Self::arrow_parts(&relation.arrow);
         let line = relation.arrow.line.raw.as_str();
 
-        let has_provided_token = left == ")";
+        let has_provided_token = left == ")" || left == "()" || middle == "()";
         let has_required_token = middle == "(" || right == "(";
 
         if has_provided_token && has_required_token {
@@ -476,13 +476,17 @@ impl ComponentResolver {
         // of `"-"`.  Direction is visual-only and does not affect semantics.
         let is_lollipop_line = line.chars().all(|c| c == '-') && !line.is_empty();
 
-        let decor_role = if is_lollipop_line && left == ")" && middle.is_empty() && right.is_empty()
-        {
-            Some(EndpointRole::Provided)
-        } else if is_lollipop_line
+        let is_canonical_provided =
+            is_lollipop_line && left == ")" && middle.is_empty() && right.is_empty();
+        let is_generic_lollipop_provided =
+            is_lollipop_line && left.is_empty() && middle == "()" && right.is_empty();
+        let is_required = is_lollipop_line
             && left.is_empty()
-            && ((middle == "(" && right.is_empty()) || (middle.is_empty() && right == "("))
-        {
+            && ((middle == "(" && right.is_empty()) || (middle.is_empty() && right == "("));
+
+        let decor_role = if is_canonical_provided || is_generic_lollipop_provided {
+            Some(EndpointRole::Provided)
+        } else if is_required {
             Some(EndpointRole::Required)
         } else {
             None
@@ -550,7 +554,7 @@ impl ComponentResolver {
             return Some(ComponentResolverError::InvalidRelationship {
                 from: input.relation.lhs.clone(),
                 to: input.relation.rhs.clone(),
-                reason: "Interface decorators '-(' and ')-' require exactly one Interface endpoint"
+                reason: "Interface decorators '-(', ')-', and '--()' require exactly one Interface endpoint"
                     .to_string(),
             });
         }
@@ -564,7 +568,7 @@ impl ComponentResolver {
             return Some(ComponentResolverError::InvalidRelationship {
                 from: input.relation.lhs.clone(),
                 to: input.relation.rhs.clone(),
-                reason: "Interface decorators '-(' and ')-' are not allowed between two interfaces"
+                reason: "Interface decorators '-(', ')-', and '--()' are not allowed between two interfaces"
                     .to_string(),
             });
         }
@@ -599,13 +603,12 @@ impl ComponentResolver {
             return Some(ComponentResolverError::InvalidRelationship {
                 from: input.relation.lhs.clone(),
                 to: input.relation.rhs.clone(),
-                reason: "Unsupported interface decorator syntax: only ')-' (Provided) and '-(' (Required) are supported"
+                reason: "Unsupported interface decorator syntax: only ')-' and '--()' (Provided) plus '-(' (Required) are supported; '()--' is rejected"
                     .to_string(),
             });
         }
         None
     }
-
     fn rule_port_role_consistency(
         input: &RelationValidationInput<'_>,
     ) -> Option<ComponentResolverError> {

plantuml/parser/puml_resolver/src/component_diagram/tests/component_resolver_test.rs

@@ -95,8 +95,8 @@ fn test_relation_simple_name_alias() {
 }
 
 #[test]
-fn test_relation_invalid_arrow_parsed_as_association() {
-    run_component_resolver_case("relation_invalid_arrow_parsed_as_association");
+fn test_relation_generic_lollipop_provided_to_component() {
+    run_component_resolver_case("relation_generic_lollipop_provided_to_component");
 }
 
 #[test]
@@ -139,6 +139,26 @@ fn test_invalid_interface_left_decorator() {
     run_component_resolver_case("invalid_interface_left_decorator");
 }
 
+#[test]
+fn test_invalid_interface_left_required_decorator() {
+    run_component_resolver_case("invalid_interface_left_required_decorator");
+}
+
+#[test]
+fn test_invalid_interface_left_generic_lollipop() {
+    run_component_resolver_case("invalid_interface_left_generic_lollipop");
+}
+
+#[test]
+fn test_invalid_interface_left_inverse_generic_lollipop() {
+    run_component_resolver_case("invalid_interface_left_inverse_generic_lollipop");
+}
+
+#[test]
+fn test_invalid_component_left_inverse_generic_lollipop() {
+    run_component_resolver_case("invalid_component_left_inverse_generic_lollipop");
+}
+
 #[test]
 fn test_invalid_interface_binding_non_component() {
     run_component_resolver_case("invalid_interface_binding_non_component");