Opened 14 years ago

Last modified 13 years ago

#1560 closed defect (wontfix)

Erroneous MetaModelica error for match expression

Reported by: Per Östlund Owned by: Per Östlund
Priority: normal Milestone:
Component: Version:
Keywords: Cc: Per Östlund, Martin Sjölund

Description

The following doesn't work when compiling with +g=MetaModelica:

package test
  function f
    input list<String> inStrs;
    output list<String> outStrs;
  algorithm
    outStrs := match(inStrs)
      local

      // This doesn't work:
      case ("this" :: _) then {"this"};

      // This does work:
      case ("this" :: _)
        equation
          s = {"this"};
        then
          s;

      else inStrs;
    end match;
  end f;

  constant list<String> str = f({"this", "isn't", "working!"});
end test;

The following error is generated:

[test.mo:6:5-11:14:writable] Error: Match expression has mismatched result types:
  list<String>
  String[1]

This pattern is used by Tpl.takeLineOrString, which makes it impossible to call that function (or any function that uses that function) from a mos-script. It's easy to work around by introducing an extra variable though.

Change History (1)

comment:1 by Martin Sjölund, 13 years ago

Works with +d=rml (problem in the language specification; fixed in MetaModelica 2.0 which will be implemented when someone feels like it)

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