Malcolm: Usability improvements in GCC 9

David Malcolm writes about improved diagnostics and more in the GCC 9 release. "Speaking of annotations, this example shows another new GCC 9 feature: diagnostics can label regions of the source code to show pertinent information. Here, what’s most important are the types of the left-hand and right-hand sides of the '+' operator, so GCC highlights them inline. Notice how the diagnostic also uses color to distinguish the two operands from each other and the operator."

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