iverilog/docs/ROADMAP.md

Feature roadmap (one-by-one)

Each item should be a dedicated feat/<name> branch, with tests/examples and a STATUS.md update. Merge only into this fork’s default branch (master).

Tier A — Compiler SV foundations (block Accellera UVM)

1. Parameterized classes — class C #(type T = int); / C#(byte) — needed for uvm_*#(T), config_db
2. Associative arrays — int aa[string];
3. Virtual interfaces + eventing on vif.clk
4. Clocking blocks — enough for @(vif.cb)
5. mailbox / semaphore builtins (or solid class equivalents with blocking put/get)
6. Constraints + randomize() / randomize() with — start unconstrained rand, then solver
7. $cast / $typename hardening for factory patterns
8. Covergroups — functional coverage
9. DPI-C — optional but common in real flows

Tier B — Library / methodology (on top of Tier A)

10. Grow uvm/ toward Accellera-shaped APIs: reporting, phases/objections, factory, config_db, TLM, sequences
11. Smoke: trimmed “hello UVM”, then larger Accellera UVM 1.2 slices as features land

Already usable baseline (do not re-do first)

Classes, packages, strings, queues/dynamic arrays, locators/reductions/ordering, chained calls — extend only when a UVM example needs a gap.

Out of scope

• Claiming “UVM 1.2 supported” until Accellera’s library compiles and runs
• Opening PRs to steveicarus/iverilog for this track (see WORKFLOW.md)