--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Check that annotation present in the AST are either primitive or user-declared
+# There is no verification on the syntax or the semantic of the annotation: just the name is checked
+#
+# Specific phases or tools have to process their annotation and check them correclty.
+module check_annotation
+
+import phase
+import annotation
+
+redef class ToolContext
+ var check_annotation_phase: Phase = new CheckAnnotationPhase(self, null)
+end
+
+private class CheckAnnotationPhase
+ super Phase
+
+ # The map of all declared user annotation
+ # note: lazy because toolcontex is set in the init
+ var declared_annotations = new MModuleMultiData[String](toolcontext.modelbuilder.model) is lazy
+
+ # The current module.
+ var mmodule: nullable MModule = null
+
+ redef fun process_nmodule(nmodule)
+ do
+ # Get the mmodule
+ var mmodule = nmodule.mmodule
+ assert mmodule != null
+ self.mmodule = mmodule
+
+ # If no decl block then quit
+ var nmoduledecl = nmodule.n_moduledecl
+ if nmoduledecl == null then return
+
+ var modelbuilder = toolcontext.modelbuilder
+
+ # Get all the new annotations
+ var annots = nmoduledecl.get_annotations("new_annotation")
+
+ # Add each new annotations in the map
+ for annot in annots do
+ var name = annot.arg_as_id(modelbuilder)
+ if name == null then continue
+
+ declared_annotations[mmodule].add(name)
+ #annot.debug "add {mmodule}: {name}"
+ end
+ end
+
+ # Raw new-line separated list of primitive annotation
+ # Note: empty-lines will be ignored since there is no annotation named by the empty string.
+ var primtives_annotations_list = """
+new_annotation
+
+fixed
+lazy
+noinit
+readonly
+writable
+cached
+
+pkgconfig
+c_compiler_option
+c_linker_option
+
+platform
+"""
+
+ # Efficient set build from `primtives_annotations_list`
+ var primtives_annotations = new HashSet[String].from(primtives_annotations_list.split("\n"))
+
+ # All user-declared annotations for each mmodule
+ var user_annotations = new HashMap[MModule, HashSet[String]]
+
+ redef fun process_annotated_node(node, nat)
+ do
+ var name = nat.name
+ if primtives_annotations.has(name) then return
+
+ var mmodule = self.mmodule
+ assert mmodule != null
+
+ # Lazily build the full user-list
+ var annots = user_annotations.get_or_null(mmodule)
+ if annots == null then
+ annots = new HashSet[String]
+ annots.add_all(declared_annotations.lookup_joined_values(mmodule, private_visibility))
+ user_annotations[mmodule] = annots
+ end
+ #nat.debug "for {mmodule}: {annots.join(" ")}"
+
+ if annots.has(name) then return
+
+ toolcontext.modelbuilder.warning(nat, "Warning: unknown annotation `{name}`")
+
+ annots.add(name) # to avoid multiple errors on the same name
+ end
+end