gistfile1.xml

<zone name="meta.preprocessor.c.include">
            <starts-with>
                <expression>^\s*#\s*(include|import)\b\s+</expression>
                <capture number="1" name="keyword.control.import.include.c"/>
            </starts-with>
            <ends-with>
                <expression>(?=(?://|/\*))|$</expression>
                <capture number="1" name="keyword.control.import.include.c"/>
            </ends-with>
            <subzones>
                <zone name="punctuation.separator.continuation.c">
                    <expression>(?>\\\s*\n)</expression>
                </zone>
                <zone name="string.quoted.double.include.c">
                    <starts-with>
                        <expression>"</expression>
                        <capture number="0" name="punctuation.definition.string.begin.c"/>
                    </starts-with>
                    <ends-with>
                        <expression>"</expression>
                        <capture number="0" name="punctuation.definition.string.end.c"/>
                    </ends-with>
                </zone>
                <zone name="string.quoted.other.lt-gt.include.c">
                    <starts-with>
                        <expression>&lt;</expression>
                        <capture number="0" name="punctuation.definition.string.begin.c"/>
                    </starts-with>
                    <ends-with>
                        <expression>></expression>
                        <capture number="0" name="punctuation.definition.string.end.c"/>
                    </ends-with>
                </zone>
            </subzones>
        </zone>