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Songlin Jia

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Escape with Your Self: Sound and Expressive Bidirectional Typing with Avoidance for(…)PLDI 20262026-06-15
Presents an algorithmic design for reachability types that proves sound and decidable bidirectional typing and avoidance, mechanized in Lean 4 and accompanied…
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Typestate via Revocable CapabilitiesPLDI 20262026-06-15
Presents a Scala 3 compiler extension (prototype in Stella) that implements flow-sensitive revocation, ties capabilities to objects via path-dependent…
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Modeling Reachability Types with Logical Relations -- Semantic Type Soundness,(…)OOPSLA 20252025-10-16
Presents a formal logical-relations model for reachability types that augments standard relations with relational store typing to localize heap reasoning, and…
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Polymorphic Reachability Types: Tracking Freshness, Aliasing, and Separation in(…)OOPSLA 20242024-10-20
Presents a type system that adds a freshness qualifier to reachability types so newly allocated values remain distinct until substituted, enabling precise…
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Polymorphic Reachability Types: Tracking Freshness, Aliasing, and Separation in ...POPL 20242024-01-14
Introduces a new freshness qualifier (diamond) that marks allocations whose reachability may materialize later, and designs two calculi (λ✦ and F✦ calculi)…
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Graph IRs for Impure Higher-Order Languages: Making Aggressive Optimizations Af...OOPSLA 20232023-10-23
A typed graph IR combines reachability types with an effect system to compute precise, flow-sensitive effect dependencies without CFA by doing type-based…
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