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
Parser
measuring 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
1
to 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.