c2iec

transpiler to convert ansii c-code to structured text

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	a/test/expr-unary.test.expected		b/test/expr-unary.test.expected
	...		...
6	a := ~4;	6	a := ~4;
7	a := b^;	7	a := b^;
8	a := -a;	8	a := -a;
9	a := +a;	9	a := +a;
10	a := ~a;	10	a := ~a;
		11
11	END_FUNCTION	12	END_FUNCTION