Neal Gafter writes: I just fixed a bug in the implementation of constant folding in the C# and VB.Net compilers. They used to require O(n^2) space. Now they require O(n) space. The naive approach to implementing string concatenation for an expression such as "S1" + "S2" + "S3" is to recursively visit the left-hand and right-hand operands and compute their constant string values, and then concatenate these strings to produce the constant string for the concatenation. It seems obviously ...
