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Casting a line into Guppy's depths

An ongoing log of everything I'm discovering about Guppy — a quantum programming language built by Quantinuum.

Recent Activity

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Video Wed Apr 15 watch
A visit to Quantinuum's Reimei quantum computer at Riken's facility in Wako, Japan
PR Wed Apr 15 view PR
PR #1651 perf: std.collections.Queue.pop constant time instead of linear time
Webinar Tue Apr 14 view
NVIDIA Quantum Day: AI for Applications: Unlocking Quantum Algorithms at Scale (Steve Clark, Head of AI, Quantinuum)

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// quantum circuit — 3 qubits
Pull Requests · Post #13
performance
PR #1651: Optimizing Queue Pop Performance
Replaced the linear-time std.collections.Queue.pop with a circular-buffer implementation that provides constant-time push, pop, and peek operations.
Apr 15, 2026 ~3 min read
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Recent Pull Requests

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Pull Requests · #12
documentation
PR #1589: Clearer Docstrings for the Angle Type
Improved the docstring for Guppy's angle class to explicitly document the half-turns convention, clarify the relationship to radians, and note that angles do not wrap around.
Mar 27, 2026 · 2 min Read ↗
Pull Requests · #11
fix
PR #1551: Fixing Nested Modifier Propagation
Fixed a bug where nested with modifier blocks (dagger, control, power) silently ignored outer modifier constraints instead of correctly propagating them through the compilation pipeline.
Mar 13, 2026 · 3 min Read ↗
Pull Requests · #10
feature
PR #1527: Clearer Errors When Misusing Guppy Objects in comptime()
Added a dedicated error diagnostic for using Guppy functions or types inside comptime() expressions, replacing raw Python tracebacks with a message that explains the problem and how to fix it.
Feb 27, 2026 · 2 min Read ↗