Fixed location reporting in structure fields

compiler/teal0/backend/IRGen.jrag

@@ -269,6 +269,9 @@ aspect IRGen {
 		m.getIRFunctions().add(f);
 	}
 
+	// Custom postprocessing operations after initial IR construction, e.g., to work around circular dependencies
+	public void Decl.postprocessIR() {}
+
 	syn IRModule Module.genIR() {
 		String name = getName().stream().collect(Collectors.joining("::"));
 
@@ -278,6 +281,7 @@ aspect IRGen {
 		// Add code for all class elements
 		for (Decl d : getDecls()) {
 			d.addIRToModule(m);
+			d.postprocessIR();
 		}
 
 		// FIXME: do we still need this code?  What does it do that the loop above doesn't do already?

compiler/teal2/backend/IRGenType.jrag

@@ -14,12 +14,25 @@ aspect IRGenType {
 		klass.setSourceLocation(this.sourceLocation());
 		// set formal type parameters
 		for (TypeVarDecl d : getTypeFormals()) {
-			klass.addIRTypeFormal(d.genIR());
+			IRTypeFormal formal = d.genIR();
+			formal.setSourceLocation(d.sourceLocation());
+			klass.addIRTypeFormal(formal);
 		}
 
 		return klass;
 	}
 
+	@Override
+	public void TypeDecl.postprocessIR() {
+		IRClass klass = this.genIRStruct();
+		// set fields
+		for (VarDecl d : getFunFormals()) {
+			IRVar field = d.genIR();
+			field.setSourceLocation(d.sourceLocation());
+			klass.addIRVar(field);
+		}
+	}
+
 	public void TypeDecl.genCode(IRClass klass) {
 		// add the class argument parameters as fields
 		for (VarDecl d : getFunFormals()) {