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Introduction

Overlays and what they can do

Simple overlay example - creating an overlay

Adding properties

Deleting an overlay

Setting fonts the right way

More properties

Visibility

Adding text

Custom properties

Notes on properties

Improving C++ compiler output

The problem with C++ error messages

Many standard class templates have default arguments

Some types are aliases for longer things, too

Reporting type information accurately means long lines

Emacs can help - Treat C++ type names as just another kind of balanced expression

Add overlays to improve readability

Create a minor mode that runs during compilation

Parsing types as balanced expressions

Indent and fill with overlays - Use ancient "pretty printing" algorithms"

Overlays can mimic line breaks and indentation

Hiding details - Marking depths with overlays

Hiding to a target depth

Demo

Conclusion

Description:

Explore how to enhance C++ compiler diagnostics using Emacs overlays in this 21-minute conference talk from EmacsConf 2023. Learn about overlay creation, properties, and manipulation techniques before diving into practical applications for improving C++ error message readability. Discover how to treat C++ type names as balanced expressions, create a minor mode for compilation, and implement indentation and hiding strategies using overlays. Gain insights into parsing complex types, applying pretty printing algorithms, and customizing overlay depth for optimal diagnostics display. Conclude with a demonstration showcasing the power of overlays in simplifying C++ compiler output within Emacs.

Improving Compiler Diagnostics with Overlays in Emacs - EmacsConf 2023

EmacsConf and Emacs hangouts

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#Programming #Software Development #Text Editors #Emacs