simontoth, 1 month ago to cpp

When working with exceptions in C++, there are three main levels of guarantees a function can provide when an exception is thrown.

🧵👇

Compiler Explorer link: https://compiler-explorer.com/z/T9YKKa5oW

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simontoth, 2 months ago to cpp

The std::forward is a conditional r-value (specifically x-value) cast.

std::forward is primarily designed to work in conjunction with universal references and will only cast to an r-value if the template argument isn't an l-value reference type.

Compiler Explorer link: https://compiler-explorer.com/z/E5dcPh6T3

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simontoth, 4 months ago to cpp

C++20 introduced a set of safe integral comparison functions that can compare different integral types without introducing accidental conversions.

Compiler Explorer: https://compiler-explorer.com/z/3Phjhrcqv

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simontoth, 4 months ago to cpp

📆 Day 21 of Advent of Code 2023 is here. Today, we are counting reachable spaces.

🧐 Very sneaky problem today (specifically part two).

🤓 Maths to the rescue.

https://open.substack.com/pub/simontoth/p/daily-bite-of-c-advent-of-code-day-f73?r=1g4l8a&utm_campaign=post&utm_medium=web

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simontoth, 4 months ago to cpp

📆 Day 18 of Advent of Code 2023 is here. Today, we are digging out a lava duct.

🤯 Part two today was a horrible debug-fest for me.

😋 Anyone who found part two easy? 😅

https://open.substack.com/pub/simontoth/p/daily-bite-of-c-advent-of-code-day-e9d?r=1g4l8a&utm_campaign=post&utm_medium=web

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simontoth, 5 months ago to cpp

📆 Day 7 of Advent of Code 2023 is here. Today, we are analyzing "Poker" hands.

😴 I have to apologize for laziness today. I went the easy route.

🤔 Did you take the time to come up with a fancy encoding to analyze the hands?

https://open.substack.com/pub/simontoth/p/daily-bite-of-c-advent-of-code-day-078?r=1g4l8a&utm_campaign=post&utm_medium=web

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simontoth, 5 months ago to cpp

📆 Day 2 of Advent of Code 2023 is here. Today, we are parsing information about cubes.

😱 Did you struggle with the parsing?
😉 What was your approach?

https://open.substack.com/pub/simontoth/p/daily-bite-of-c-advent-of-code-day-e49?r=1g4l8a&utm_campaign=post&utm_medium=web

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simontoth, 7 months ago to cpp

C++20 introduced the <bit> header with a group of functions for manipulating and querying bits in unsigned integers.

These functions were previously only available as compiler extensions.

Compiler Explorer link: https://compiler-explorer.com/z/qEWzzcfv9

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simontoth, 10 months ago to cpp

Tuesday common C++ interview problem: O(1) region sum.

Given a 2D grid of integers, provide a method that calculates the sum of a sub-region:

• int64_t Grid::region_sum(Coord top_left, Coord bottom_right) const;

The methods must operate in O(1). You are allowed preprocessing and O(|grid|) memory.

Solve it yourself: https://compiler-explorer.com/z/nxvqrqfWq
Solution: https://compiler-explorer.com/z/31GMbscxT

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simontoth, 10 months ago to cpp

The C++23 standard introduced a monadic interface for std::optional<T>.

• transform(f(T)->U)->std::optional<U>

only invoked when the source isn't empty

• and_then(f(T)->std::optional<U>)->std::optional<U>

only invoked when the source isn't empty

• or_else(f()->std::optional<T>)->std::optional<T>

only invoked when the source is empty

Compiler Explorer link: https://compiler-explorer.com/z/4dzc776Gq

#cpp #cplusplus #coding #programming #dailybiteofcpp