tutorial intro to includes

packages/squiggle-lang/__tests__/ReducerProject/ReducerProject_tutorial_1_multisource_test.res

@@ -63,5 +63,54 @@ Case "Running multiple sources"
         bindings3->InternalExpressionValue.IEvBindings->InternalExpressionValue.toString,
       )->expect == ("Ok(())", "@{x: 1,y: 2,z: 3}")
     })
+
+    test("Intro to including", () => {
+      /* Though it would not be practical for a storybook, 
+        let's write the same project above with includes.
+        You will see that parsing includes is setting the dependencies the same way as before.
+ */
+      let project = Project.createProject()
+
+      /* This time source1 and source2 are not depending on anything */
+      Project.setSource(project, "source1", "x=1")
+      Project.setSource(project, "source2", "y=2")
+
+      Project.setSource(
+        project,
+        "source3",
+        `
+      #include "source1"
+      #include "source2"
+      z=3`,
+      )
+      /* We need to parse the includes to set the dependencies */
+      Project.parseIncludes(project, "source3")
+
+      /* Now we can run the project */
+      Project.runAll(project)
+
+      /* And let's check the result and bindings of source3 
+      This time you are getting all the variables because we are including the other sources 
+      Behind the scenes parseIncludes is setting the dependencies */
+      let result3 = Project.getResult(project, "source3")
+      let bindings3 = Project.getBindings(project, "source3")
+
+      (
+        result3->InternalExpressionValue.toStringOptionResult,
+        bindings3->InternalExpressionValue.IEvBindings->InternalExpressionValue.toString,
+      )->expect == ("Ok(())", "@{x: 1,y: 2,z: 3}")
+      /* 
+      Doing it like this is too verbose for a storybook 
+      But I hope you have seen the relation of setContinues and parseIncludes 
+      */
+      /* 
+         Dealing with includes needs more. 
+         - There are parse errors
+         - There are cyclic includes
+         - And the depended source1 and source2 is not already there in the project
+         - If you knew the includes before hand there would not be point of the include directive.
+         More on those on the next section.
+      */
+    })
   })
 })

packages/squiggle-lang/src/rescript/ForTS/ForTS__Types.res

@@ -21,4 +21,3 @@
 @genType type pointSetDistribution = ForTS_Distribution_PointSetDistribution.pointSetDistribution //re-export
 @genType type sampleSetDistribution = ForTS_Distribution_SampleSetDistribution.sampleSetDistribution //re-export
 @genType type symbolicDistribution = ForTS_Distribution_SymbolicDistribution.symbolicDistribution //re-export
-