This book constitutes the proceedings of the 23nd Asian Symposium on Programming Languages and Systems, APLAS 2025, held in Bengaluru, India, October 2730, 2025.

The 13 full papers presented here were carefully reviewed and selected from 28 submissions.They were focused on the following topical sections: Type Systems, Safety, and Verification; Control, Effects, and Decidability; Quantum Programming and Logic; Program Analysis, Specifications, and Decision Procedures; AI and Compiler Optimisation for Performance.

Inhalt

**.- Type Systems, Safety, and Verification.
.- Memory Safety: Uniqueness as Separation.
.- Fair Termination for Resource-Aware Active Objects.
.- A Formal Foundation for Equational Reasoning on Probabilistic Programs.
.- Control, Effects, and Decidability.
.- Reachability is Decidable for ATM-Typable Finitary PCF with Effect Handlers.
.- Expressive Power of One-Shot Control Operators and Coroutines.
.- Positive Sharing and Abstract Machines.
.- Quantum Programming and Logic.
.- IMALL with a Mixed-State Modality: A Logical Approach to Quantum Computation.
.- A Quantum-Control Lambda-Calculus with Multiple Measurement Bases.
.- Program Analysis, Specifications, and Decision Procedures.
.- Checking Consistency of Event-driven Traces.
.- Specification Inference modulo Oracles for Database-backed Web Applications.
.- Decision Procedures for A Theory of String Sequences.
.- AI and Compiler Optimisation for Performance.**
.- ELTC: An End-to-End Large Language Model-Based Tensor Compilation Optimization Framework.
.- Performance Optimization of HPC Workloads in Cloud Using AI-Driven Algorithms.