*
   * <p>Unlike {@link Float#parseFloat(String)}, this method returns {@code null} instead of
   * throwing an exception if parsing fails. Valid inputs are exactly those accepted by {@link
   * Float#valueOf(String)}, except that leading and trailing whitespace is not permitted.
   *
   * <p>This implementation is likely to be faster than {@code Float.parseFloat} if many failures
   * are expected.
   *

     * @return The setting value as a float.
     */
    public float getAsFloat(final String key, final float defaultValue) {
        return getAs(key, defaultValue, Float::parseFloat);
    }

    /**
     * Retrieves a setting value as a boolean.
     * @param key The key of the setting.
     * @param defaultValue The default value if the setting is not found.

        }
        if (value instanceof Double) {
            return ((Double) value).floatValue();
        }
        if (value != null) {
            try {
                return Float.parseFloat(value.toString());
            } catch (final NumberFormatException e) {
                logger.warn("Failed to parse boost value: expression={}, value={}", boostExpression, value, e);
                return 0.0f;

        assertEquals(Long.parseLong(expected), DocumentUtil.getValue(doc, "key1", Long.class).longValue());
        assertEquals(Float.parseFloat(expected), DocumentUtil.getValue(doc, "key1", Float.class).floatValue());
        assertEquals(Double.parseDouble(expected), DocumentUtil.getValue(doc, "key1", Double.class).doubleValue());

	value, err := strconv.ParseUint(str, 0, 64)
	if err != nil {
		p.errorf("%s", err)
	}
	return value
}

func (p *Parser) atof(str string) float64 {
	value, err := strconv.ParseFloat(str, 64)
	if err != nil {
		p.errorf("%s", err)
	}
	return value
}

// EOF represents the end of input.
var EOF = lex.Make(scanner.EOF, "EOF")

func (p *Parser) next() lex.Token {