# Contributing guidelines

## Pull Request Checklist

Before sending your pull requests, make sure you do the following:

-   Read the [contributing guidelines](CONTRIBUTING.md).
-   Read the [Code of Conduct](CODE_OF_CONDUCT.md).
-   Ensure you have signed the
    [Contributor License Agreement (CLA)](https://cla.developers.google.com/).
-   Check if your changes are consistent with the

            throw new IllegalArgumentException("Expecting collection with single element, got multiple.");
        }
        return element;
    }

    public static <T> Collection<? extends T> checkedCast(Class<T> type, Collection<?> input) {
        for (Object o : input) {
            castNullable(type, o);
        }
        return uncheckedNonnullCast(input);
    }

    @Nullable

   * @throws IllegalArgumentException if {@code value} is greater than {@link Character#MAX_VALUE}
   *     or less than {@link Character#MIN_VALUE}
   */
  public static char checkedCast(long value) {
    char result = (char) value;
    checkArgument(result == value, "Out of range: %s", value);
    return result;
  }

  /**
   * Returns the {@code char} nearest in value to {@code value}.
   *

   * @throws IllegalArgumentException if {@code value} is greater than {@link Character#MAX_VALUE}
   *     or less than {@link Character#MIN_VALUE}
   */
  public static char checkedCast(long value) {
    char result = (char) value;
    checkArgument(result == value, "Out of range: %s", value);
    return result;
  }

  /**
   * Returns the {@code char} nearest in value to {@code value}.
   *

            throw new IllegalArgumentException("Expecting collection with single element, got multiple.");
        }
        return element;
    }

    public static <T> Collection<? extends T> checkedCast(Class<T> type, Collection<?> input) {
        logDeprecation(7);
        for (Object o : input) {
            castNullable(type, o);
        }
        return uncheckedNonnullCast(input);
    }

		// referenced by name. Also no need to do overwriting
		// check, as same hash indicates same content.
		var checkHash func() (symAndSize, bool)
		var addToHashMap func(symAndSize)
		var h64 uint64        // only used for hashed64Def
		var h *goobj.HashType // only used for hashedDef
		if kind == hashed64Def {
			checkHash = func() (symAndSize, bool) {
				h64 = r.Hash64(li - uint32(r.ndef))
				s, existed := st.hashed64Syms[h64]

   * @throws IllegalArgumentException if {@code value} is greater than {@link Short#MAX_VALUE} or
   *     less than {@link Short#MIN_VALUE}
   */
  public static short checkedCast(long value) {
    short result = (short) value;
    checkArgument(result == value, "Out of range: %s", value);
    return result;
  }

  /**
   * Returns the {@code short} nearest in value to {@code value}.
   *

   * @throws IllegalArgumentException if {@code value} is greater than {@link Short#MAX_VALUE} or
   *     less than {@link Short#MIN_VALUE}
   */
  public static short checkedCast(long value) {
    short result = (short) value;
    checkArgument(result == value, "Out of range: %s", value);
    return result;
  }

  /**
   * Returns the {@code short} nearest in value to {@code value}.
   *

   * @throws IllegalArgumentException if {@code value} is greater than {@link Integer#MAX_VALUE} or
   *     less than {@link Integer#MIN_VALUE}
   */
  public static int checkedCast(long value) {
    int result = (int) value;
    checkArgument(result == value, "Out of range: %s", value);
    return result;
  }

  /**
   * Returns the {@code int} nearest in value to {@code value}.
   *

	// moduledata linked list.
	MOVD	runtime·lastmoduledatap(SB), R1
	MOVD	R2, moduledata_next(R1)
	MOVD	R2, runtime·lastmoduledatap(SB)

	// Restore R6-R15.
	LMG	48(R15), R6, R15
	RET

TEXT ·checkASM(SB),NOSPLIT,$0-1
	MOVB	$1, ret+0(FP)
	RET

// gcWriteBarrier informs the GC about heap pointer writes.
//
// gcWriteBarrier does NOT follow the Go ABI. It accepts the