Analyze
Dependency analysis
Dependency Analysis
1. Create Dependency Graph
Create unconnected vertices in the design’s dependency graph for every VHDL library object and every design unit.
The vertex’s ID field is set to a unique identifying string.
The following patterns are used:
- Libraries
The normalized library name:
library.- Contexts
The normalized library and context name:
library.context.- Entities
The normalized library and entity name:
library.entity.- Architectures
The normalized library, entity and architecture name in parenthesis:
library.entity(architecture).- Packages
The normalized library and package name:
library.package.- Package Bodies
The normalized library and package name:
library.package(body).
The vertex’s Value field references to the library or design unit object respectively.
Each vertex has two attributes:
"kind"A kind attribute is set to an enumeration value of
DependencyGraphVertexKindrepresenting vertex kind (type)."predefined"A predefined attribute is set to
True, if the library or design unit is a VHDL predefined language entity from e.g. fromstdorieee.
Lastly, every vertex is assigned to a :py:attr:~pyVHDLModel.DesignUnit.DesignUnit._dependencyVertex field. Thus,
there is a double reference from graph’s vertex via Value to the DOM object as well as in reverse via
_dependencyVertex to the representing vertex.
predefinedLibraries = ("std", "ieee")
for libraryIdentifier, library in self._libraries.items():
dependencyVertex = Vertex(vertexID=f"{libraryIdentifier}", value=library, graph=self._dependencyGraph)
dependencyVertex["kind"] = DependencyGraphVertexKind.Library
dependencyVertex["predefined"] = libraryIdentifier in predefinedLibraries
library._dependencyVertex = dependencyVertex
for contextIdentifier, context in library._contexts.items():
dependencyVertex = Vertex(vertexID=f"{libraryIdentifier}.{contextIdentifier}", value=context, graph=self._dependencyGraph)
dependencyVertex["kind"] = DependencyGraphVertexKind.Context
dependencyVertex["predefined"] = context._library._normalizedIdentifier in predefinedLibraries
context._dependencyVertex = dependencyVertex