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
1	FUNCTION test:DINT;	1	FUNCTION test:DINT;
		2	a: DINT;
2	b: POINTER TO DINT;	3	b: POINTER TO DINT;
3	a := -1;	4	a := -1;
4	a := +2;	5	a := +2;
5	a := ~4;	6	a := ~4;
6	a := b^;	7	a := b^;
7	a := -a;	8	a := -a;
8	a := +a;	9	a := +a;
9	a := ~a;	10	a := ~a;
10		11	END_FUNCTION