M2compiler-V3/compiler/tests/t_fwdtype.mod

MODULE tfwdtype;
// REJECTED BY DESIGN: a module-level forward type reference (a global
// whose type is declared further down).  Modula-2 requires declaration
// before use; only a POINTER's base type may forward-reference.  gm2
// accepts this as a leniency.  Expects "undeclared identifier".
VAR g : Later;
TYPE Later = RECORD x, y : INTEGER END;
VAR ExitCode : INTEGER;
BEGIN
  g.x := 40; g.y := 2;
  ExitCode := g.x + g.y
END tfwdtype.