id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
3294	Precalculate less functions	Rüdiger Franke	somebody	"The example `Modelica.Utilities.Examples.readRealParameterModel` is all about reading model parameters at simulation time.
{{{#!mo
model readRealParameterModel ""Demonstrate usage of Examples.readRealParameter/.expression""
  import SI = Modelica.SIunits;
  extends Modelica.Icons.Example;
  parameter String file = Modelica.Utilities.Files.loadResource(""modelica://Modelica/Resources/Data/Utilities/Examples_readRealParameters.txt"") ""File on which data is present"";
  parameter SI.Inertia J = readRealParameter(file, ""J"") ""Inertia"";
  parameter SI.Angle phi_rel0 = readRealParameter(file, ""phi_rel0"") ""Relative angle"";
  parameter SI.AngularVelocity w_rel0 = readRealParameter(file, ""w_rel0"") ""Relative angular velocity"";
end readRealParameterModel;
}}}

OpenModelica evaluates everything at translation time. This can hardly be counted as a passed test. The `file` must be read at simulation time.

As of today one can generally introduce some dummy inputs, whose values are not known at translation time, and pass them to a function like `readReadParameter`. Then the evaluation of the function is shifted to the simulation time -- and it works fine typically.

How can the translation of OpenModelica be changed to evaluate less functions, so that models like `readRealParameterModel` work as intended, without tricks?
"	defect	new	high	Future	Frontend	trunk