Add DataflowGraph and fix part of substitutions

.github/workflows/per-lib-check.yml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Regenerate all dtgen files
         run: |
-          proj dtgen --force --delete-outdated
+          proj dtgen --force
 
       - name: Run cmake
         run: |
@@ -76,9 +76,9 @@ jobs:
         run: |
           build_libs.sh kernels
 
-      # - name: Build substitutions
-      #   run: |
-      #     build_libs.sh substitutions
+      - name: Build substitutions
+        run: |
+          build_libs.sh substitutions
 
       # - name: Build compiler
       #   run: |
@@ -104,9 +104,9 @@ jobs:
         run: |
           test_libs.sh pcg
 
-      # - name: Test substitutions
-      #   run: |
-      #     test_libs.sh substitutions
+      - name: Test substitutions
+        run: |
+          test_libs.sh substitutions
 
       # - name: Test compiler
       #   run: |

.proj.toml

@@ -8,7 +8,7 @@ build_targets = [
   "op-attrs",
   "kernels",
   "pcg",
-  # "substitutions",
+  "substitutions",
   # "compiler",
   "substitution-generator",
   "local-execution", 
@@ -18,7 +18,7 @@ test_targets = [
   "utils-tests",
   "op-attrs-tests",
   "pcg-tests",
-  # "substitutions-tests",
+  "substitutions-tests",
   # "compiler-tests",
   "substitution-generator-tests",
 ]