Comments (2)
Hi!
I think a good first step would be to report the lines where lexical errors occur. I will try to implement that by adding the line number in the Lexer
struct in lexer.rs so it can be used in errors. Then I will also add it to the Span
struct in lexer.rs so it can be used later during the parsing.
What do you think about it?
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Span
is sufficient to track source code locations, it can be translated back into line numbers, and the lexer already reports errors in that way. The challenge is to add spans to AST nodes and keep them around, without them getting in the way everywhere. The first thing that comes to mind is to add a Span
to every AST node, but that means having to update every match, so it is very invasive, and it also pollutes the matches with this span field that you usually don’t care about. I am not aware of an elegant solution, but I also haven’t researched or thought about this extensively yet.
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Related Issues (19)
- Write a custom lexer HOT 1
- Expose access to bounding box edges HOT 2
- Add support for raw, multiline string literals HOT 1
- Windows support HOT 2
- Add support for raster images HOT 1
- Syntax highlighting HOT 2
- Unable to build on 32 bit platforms HOT 2
- Accessing glyphs by glyph index or name HOT 6
- Support drawing svg subsets
- Panic when raw string literal ends with a blank line HOT 1
- Operators should associate left, not right HOT 1
- Expose .x and .y fields on coords HOT 1
- Allow arithmetic with colors
- Allow custom dimensions HOT 3
- Add element as text backend
- Rotate and bounding boxes
- Highlight on multiline string syntax error is wrong
- Please document how to use lists HOT 1
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