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On 19 August 2016 at 18:27, Eric V. Smith <eric@trueblade.com> wrote:
For something else that would become significantly more complicated to implement, you need look no further than the stdlib's own tokenizer module. So Python itself would require changes to parsers/lexers in Python/ast.c, IDLE, and Lib/tokenizer.py. In addition it would require adding tokens to Include/tokens.h and the generated Lib/token.py, and everyone using those files would need to adapt.
Not that it's impossible, of course. But don't underestimate the amount of work this proposal would cause to the many places in and outside of Python that examine Python code.
And if folks want to do something more clever than regex based single colour string highlighting, Python's own AST module is available to help them out: >>> tree = ast.parse("f'example{parsing:formatting}and trailer'") >>> ast.dump(tree) "Module(body=[Expr(value=JoinedStr(values=[Str(s='example'), FormattedValue(value=Name(id='parsing', ctx=Load()), conversion=-1, format_spec=Str(s='formatting')), Str(s='and trailer')]))])" Extracting the location of the field expression for syntax highlighting: >>> ast.dump(tree.body[0].value.values[1].value) "Name(id='parsing', ctx=Load())" (I haven't shown it in the example, but AST nodes have lineno and col_offset fields so you can relocate the original source code for processing) Cheers, Nick. -- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia