Introduce column number in AST nodes #1724
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This PR introduces column numbers in all AST nodes.
It also modifies the existing tests for the parser, and adds a lot more cases in a different class. I have gone through
Parsermeasuring code coverage to ensure that the tests cover (almost) all the cases - the things I didn't really test are the non-standard things like xml, array comprehension, or let expression.There is a breaking change: in case of a function call such as:
rhino will now assign line
1to the expression, not line2(i.e. we assign the start of the expression, not the position of the parenthesis for the function call). This is for coherency with other parsers - I've checked what happen via https://astexplorer.net/ and it seems like the consensus is what I have implemented.