Examples/test-suite/java/cpp20_abbreviated_template_runme.java

import cpp20_abbreviated_template.*;

public class cpp20_abbreviated_template_runme {

  static {
    try {
      System.loadLibrary("cpp20_abbreviated_template");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[]) {
    // Single auto parameter.
    if (cpp20_abbreviated_template.twice_int(5) != 10)
      throw new RuntimeException("twice_int(5)");
    if (cpp20_abbreviated_template.twice_short((short)7) != 14)
      throw new RuntimeException("twice_short(7)");

    // Two auto parameters with mixed types (int * double => double).
    if (cpp20_abbreviated_template.scale_id(3, 2.5) != 7.5)
      throw new RuntimeException("scale_id(3, 2.5)");

    // Three auto parameters.
    if (cpp20_abbreviated_template.sum3_iii(1, 2, 3) != 6)
      throw new RuntimeException("sum3_iii(1, 2, 3)");

    // Unnamed auto parameter.
    if (cpp20_abbreviated_template.unnamed_auto_int(99) != 42)
      throw new RuntimeException("unnamed_auto_int(99)");

    // Constrained auto.
    if (cpp20_abbreviated_template.twice_numeric_int(7) != 14)
      throw new RuntimeException("twice_numeric_int(7)");

    // Mixed type-constraints.
    if (cpp20_abbreviated_template.scale_mixed_id(3, 2.5) != 7.5)
      throw new RuntimeException("scale_mixed_id(3, 2.5)");

    // Same type-constraint on multiple parms.
    if (cpp20_abbreviated_template.add_same_int(4, 5) != 9)
      throw new RuntimeException("add_same_int(4, 5)");

    // Unnamed constrained auto.
    if (cpp20_abbreviated_template.unnamed_constrained_int(99) != 42)
      throw new RuntimeException("unnamed_constrained_int(99)");

    // Constrained auto return type with explicit trailing return type.
    if (cpp20_abbreviated_template.half(10) != 5)
      throw new RuntimeException("half(10)");
    if (cpp20_abbreviated_template.cube_constrained_int(3) != 27)
      throw new RuntimeException("cube_constrained_int(3)");

    // Plain auto return type + constrained auto parameter + trailing return type.
    if (cpp20_abbreviated_template.twice_n_arrow_int(7) != 14)
      throw new RuntimeException("twice_n_arrow_int(7)");

    // A decltype in the trailing return type names the parameter, so the %template argument gives the return type.
    if (cpp20_abbreviated_template.shadow_placeholder_double(2.5) != 2.5)
      throw new RuntimeException("shadow_placeholder_double(2.5)");
    if (cpp20_abbreviated_template.second_placeholder_id(1, 2.5) != 2.5)
      throw new RuntimeException("second_placeholder_id(1, 2.5)");
    if (cpp20_abbreviated_template.constrained_arrow_double(1.25) != 2.5)
      throw new RuntimeException("constrained_arrow_double(1.25)");

    // Auto parameter pack - one wrapped parameter per type given to %template.
    if (cpp20_abbreviated_template.sum_all_ii(1, 2) != 3)
      throw new RuntimeException("sum_all_ii(1, 2)");
    if (cpp20_abbreviated_template.sum_all_iii(1, 2, 3) != 6)
      throw new RuntimeException("sum_all_iii(1, 2, 3)");
    if (cpp20_abbreviated_template.sum_numeric_ii(4, 5) != 9)
      throw new RuntimeException("sum_numeric_ii(4, 5)");

    // Ordinary parameter ahead of an auto parameter pack.
    if (cpp20_abbreviated_template.offset_sum_ii(1, 2, 3) != 6)
      throw new RuntimeException("offset_sum_ii(1, 2, 3)");

    // A pack followed by a plain parameter, which invents no template parameter of its own.
    if (cpp20_abbreviated_template.pack_then_plain_ii(1, 2, 7) != 207)
      throw new RuntimeException("pack_then_plain_ii(1, 2, 7)");
    if (cpp20_abbreviated_template.pack_then_plain_numeric_ii(1, 2, 5.0) != 205)
      throw new RuntimeException("pack_then_plain_numeric_ii(1, 2, 5.0)");

    // The size of each pack, which a wrong partition between them changes.
    if (cpp20_abbreviated_template.count_two_packs_ii(1, 2) != 200)
      throw new RuntimeException("count_two_packs_ii(1, 2)");

    if (cpp20_abbreviated_template.count_two_packs_iii(1, 2, 3) != 300)
      throw new RuntimeException("count_two_packs_iii(1, 2, 3)");
    if (cpp20_abbreviated_template.count_two_packs_renamed(1, 2, 3, 4) != 400)
      throw new RuntimeException("count_two_packs_renamed(1, 2, 3, 4)");
    if (cpp20_abbreviated_template.count_pack_then_one_iii(1, 2, 3) != 203)
      throw new RuntimeException("count_pack_then_one_iii(1, 2, 3)");
    if (cpp20_abbreviated_template.count_trailing_pack_ii(1, 2, 3) != 102)
      throw new RuntimeException("count_trailing_pack_ii(1, 2, 3)");

    // Undecorated auto parameter pack.
    if (cpp20_abbreviated_template.sum_bare_ii(1, 2) != 3)
      throw new RuntimeException("sum_bare_ii(1, 2)");
    if (cpp20_abbreviated_template.sum_bare_iii(1, 2, 3) != 6)
      throw new RuntimeException("sum_bare_iii(1, 2, 3)");
    if (cpp20_abbreviated_template.unnamed_bare_ii(7, 8) != 42)
      throw new RuntimeException("unnamed_bare_ii(7, 8)");

    // The pack determines the arity of the wrapper.
    try {
      cpp20_abbreviated_template.class.getMethod("sum_all_ii", int.class, int.class);
    } catch (NoSuchMethodException e) {
      throw new RuntimeException("sum_all_ii should take two arguments");
    }
    try {
      cpp20_abbreviated_template.class.getMethod("sum_all_ii", int.class, int.class, int.class);
      throw new RuntimeException("sum_all_ii should take two arguments");
    } catch (NoSuchMethodException expected) {
    }

    // An 'auto&&' pack wraps as pointer parms in Java, like any other 'auto&&' parm.
    try {
      cpp20_abbreviated_template.class.getMethod("sum_fwd_ii", SWIGTYPE_p_int.class, SWIGTYPE_p_int.class);
    } catch (NoSuchMethodException e) {
      throw new RuntimeException("sum_fwd_ii should take two pointer arguments");
    }

    // Constrained 'Numeric auto' return without a trailing return type - SWIG cannot deduce so the function is ignored.
    try {
      cpp20_abbreviated_template.class.getMethod("half_numeric", int.class);
      throw new RuntimeException("half_numeric should be ignored (deduced return type)");
    } catch (NoSuchMethodException expected) {
    }
  }
}