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CopilotocramzMarco Zocca
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Add CI with GitHub Actions, reduce warnings (#88)
* Initial plan * Add CI infrastructure with GitHub Actions, update Makefile, and enable -Wall Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Fix hlint invocation to use stack exec for consistency Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Add explicit GITHUB_TOKEN permissions for security Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Fix compilation errors for -Wall -Werror: remove unused code, fix shadowing, add type signatures Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Add CI with GitHub Actions, strict compilation flags, enhanced Makefile, and -Wall -Werror compliance fixes Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Continue fixing -Wall -Werror errors: fix SpVector, IntMap2, add more type signatures Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Fix remaining -Wall -Werror errors in Control/Iterative, IntMap2, SpMatrix, and most of Common Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Fix all remaining -Wall -Werror errors in Common.hs and Sparse.hs Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Complete -Wall -Werror fixes: all modules build successfully, tests run Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Add COMMENTED_OUT_FUNCTIONS.md documenting all functions disabled for -Wall -Werror Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Clean up commented pragmas in Sparse.hs Removed fake ghc flag * Use IM.foldl' instead of foldl' in fromListSM' * Replace IM.foldl' with foldl' in fromListSM' * Update build-depends and ghc-options in cabal file * Enable eigsArnoldi and verify eigensolvers work with Real and Complex types (#86) * Initial plan * Uncomment and enable eigsArnoldi for Real matrices, add comprehensive tests for eigensolvers - Uncommented eigsArnoldi function in Numeric.LinearAlgebra.Sparse module - Simplified eigsArnoldi type signature to remove outdated constraints (MonadLog, PrintDense, V) - Exported eigsArnoldi from the module - Added checkEigsArnoldi test helper function - Added comprehensive test suite for eigsArnoldi with Real matrices (4 specific test cases) - Added property tests for eigsQR (Real and Complex) and eigsArnoldi (Real) - Verified eigsQR works with both Real and Complex matrices (existing tests pass) - Note: eigsArnoldi cannot work with Complex matrices due to Normed instance constraint mismatch (RealScalar (Complex Double) = Double but Scalar (Complex Double) = Complex Double) Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Fix prop_eigsArnoldi to handle edge cases with small matrices - Guard against negative iteration count when nrows m is small - Ensure at least 1 iteration and at most 5 or n-1 iterations Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> * Update CI badge in README.md * matrix factorizations are cursed, split into separate test suite * split factorizations into separate ci script * readme * CI job names * fewer warnings --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: ocramz <5902760+ocramz@users.noreply.github.com> Co-authored-by: Marco Z <ocramz@users.noreply.github.com> Co-authored-by: Marco Zocca <marco.zocca@unfoldml.com>
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‎.github/workflows/ci.yml‎

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name: CI-library
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on:
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push:
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branches: [ master, main ]
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pull_request:
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branches: [ master, main ]
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jobs:
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build:
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name: Build and Test (Main Suite)
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runs-on: ubuntu-latest
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permissions:
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contents: read
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strategy:
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matrix:
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ghc: ['9.4.8', '9.6.6', '9.8.2']
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fail-fast: false
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steps:
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- uses: actions/checkout@v4
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- name: Setup Haskell
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uses: haskell-actions/setup@v2
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with:
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ghc-version: ${{ matrix.ghc }}
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enable-stack: true
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stack-version: 'latest'
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- name: Cache Stack dependencies
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uses: actions/cache@v4
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with:
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path: |
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~/.stack
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.stack-work
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key: ${{ runner.os }}-stack-${{ matrix.ghc }}-${{ hashFiles('stack.yaml', 'sparse-linear-algebra.cabal') }}
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restore-keys: |
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${{ runner.os }}-stack-${{ matrix.ghc }}-
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${{ runner.os }}-stack-
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- name: Install dependencies
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run: |
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stack build --only-dependencies --test --no-terminal
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- name: Build
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run: |
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stack build --test --no-terminal --no-run-tests
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- name: Run main test suite
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run: |
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stack test sparse-linear-algebra:spec --no-terminal
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lint:
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name: Lint with HLint
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runs-on: ubuntu-latest
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permissions:
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contents: read
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steps:
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- uses: actions/checkout@v4
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- name: Setup Haskell
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uses: haskell-actions/setup@v2
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with:
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ghc-version: '9.6.6'
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enable-stack: true
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stack-version: 'latest'
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- name: Cache Stack dependencies
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uses: actions/cache@v4
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with:
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path: ~/.stack
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key: ${{ runner.os }}-stack-hlint-${{ hashFiles('stack.yaml') }}
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restore-keys: |
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${{ runner.os }}-stack-hlint-
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- name: Install HLint
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run: |
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stack install hlint
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- name: Run HLint
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run: |
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stack exec hlint -- src test

‎.github/workflows/matrix_factorizations.yml‎

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name: CI-matrix-factorizations
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on:
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push:
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branches: [ master, main ]
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pull_request:
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branches: [ master, main ]
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jobs:
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matrix-factorizations-tests:
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name: Test Matrix Factorizations
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runs-on: ubuntu-latest
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permissions:
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contents: read
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continue-on-error: true # Allow this job to fail without blocking PR/merge
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strategy:
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matrix:
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ghc: ['9.4.8', '9.6.6', '9.8.2']
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fail-fast: false
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steps:
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- uses: actions/checkout@v4
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- name: Setup Haskell
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uses: haskell-actions/setup@v2
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with:
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ghc-version: ${{ matrix.ghc }}
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enable-stack: true
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stack-version: 'latest'
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- name: Cache Stack dependencies
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uses: actions/cache@v4
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with:
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path: |
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~/.stack
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.stack-work
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key: ${{ runner.os }}-stack-${{ matrix.ghc }}-${{ hashFiles('stack.yaml', 'sparse-linear-algebra.cabal') }}
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restore-keys: |
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${{ runner.os }}-stack-${{ matrix.ghc }}-
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${{ runner.os }}-stack-
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- name: Install dependencies
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run: |
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stack build --only-dependencies --test --no-terminal
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- name: Build
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run: |
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stack build --test --no-terminal --no-run-tests
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- name: Run matrix factorizations test suite
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run: |
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stack test sparse-linear-algebra:matrix-factorizations --no-terminal
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‎COMMENTED_OUT_FUNCTIONS.md‎

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# Summary of Functions Commented Out for -Wall -Werror Compliance
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This document lists all the functions that were commented out during the process of enabling strict `-Wall -Werror` compilation flags. These functions were unused in the codebase but may be useful for future development.
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## File: src/Numeric/LinearAlgebra/Sparse.hs
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### 1. BCG (Biconjugate Gradient) Solver Functions
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#### `bcgInit`
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**Lines**: 882-889 (commented)
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```haskell
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bcgInit :: LinearVectorSpace (SpVector a) =>
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MatrixType (SpVector a) -> SpVector a -> SpVector a -> BCG a
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bcgInit aa b x0 = BCG x0 r0 r0hat p0 p0hat where
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r0 = b ^-^ (aa #> x0)
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r0hat = r0
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p0 = r0
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p0hat = r0
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```
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**Purpose**: Initializes the BCG solver state with initial guess and computes initial residuals
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#### `bcgStep`
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**Lines**: 891-908 (commented)
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```haskell
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bcgStep :: (MatrixType (SpVector a) ~ SpMatrix a,
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LinearVectorSpace (SpVector a), InnerSpace (SpVector a),
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MatrixRing (SpMatrix a), Fractional (Scalar (SpVector a))) =>
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SpMatrix a -> BCG a -> BCG a
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bcgStep aa (BCG x r rhat p phat) = BCG x1 r1 rhat1 p1 phat1 where
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aap = aa #> p
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alpha = (r `dot` rhat) / (aap `dot` phat)
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x1 = x ^+^ (alpha .* p)
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r1 = r ^-^ (alpha .* aap)
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rhat1 = rhat ^-^ (alpha .* (transpose aa #> phat))
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beta = (r1 `dot` rhat1) / (r `dot` rhat)
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p1 = r1 ^+^ (beta .* p)
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phat1 = rhat1 ^+^ (beta .* phat)
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```
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**Purpose**: Performs one iteration step of the BCG algorithm
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---
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### 2. CGS (Conjugate Gradient Squared) Solver Functions
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#### `cgsInit`
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**Lines**: 917-921 (commented)
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```haskell
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cgsInit :: LinearVectorSpace (SpVector a) =>
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MatrixType (SpVector a) -> SpVector a -> SpVector a -> CGS a
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cgsInit aa b x0 = CGS x0 r0 r0 r0 where
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r0 = b ^-^ (aa #> x0) -- residual of initial guess solution
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```
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**Purpose**: Initializes the CGS solver state
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#### `cgsStep`
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**Lines**: 923-945 (commented)
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```haskell
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cgsStep :: (V (SpVector a), Fractional (Scalar (SpVector a))) =>
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MatrixType (SpVector a) -> SpVector a -> CGS a -> CGS a
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cgsStep aa rhat (CGS x r p u) = CGS xj1 rj1 pj1 uj1
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where
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aap = aa #> p
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alphaj = (r `dot` rhat) / (aap `dot` rhat)
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q = u ^-^ (alphaj .* aap)
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xj1 = x ^+^ (alphaj .* (u ^+^ q)) -- updated solution
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rj1 = r ^-^ (alphaj .* (aa #> (u ^+^ q))) -- updated residual
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betaj = (rj1 `dot` rhat) / (r `dot` rhat)
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uj1 = rj1 ^+^ (betaj .* q)
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pj1 = uj1 ^+^ (betaj .* (q ^+^ (betaj .* p)))
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```
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**Purpose**: Performs one iteration step of the CGS algorithm
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---
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### 3. BiCGSTAB (Biconjugate Gradient Stabilized) Solver Functions
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#### `bicgsInit`
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**Lines**: 950-954 (commented)
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```haskell
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bicgsInit :: LinearVectorSpace (SpVector a) =>
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MatrixType (SpVector a) -> SpVector a -> SpVector a -> BICGSTAB a
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bicgsInit aa b x0 = BICGSTAB x0 r0 r0 where
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r0 = b ^-^ (aa #> x0) -- residual of initial guess solution
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```
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**Purpose**: Initializes the BiCGSTAB solver state
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#### `bicgstabStep`
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**Lines**: 956-971 (commented)
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```haskell
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bicgstabStep :: (V (SpVector a), Fractional (Scalar (SpVector a))) =>
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MatrixType (SpVector a) -> SpVector a -> BICGSTAB a -> BICGSTAB a
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bicgstabStep aa r0hat (BICGSTAB x r p) = BICGSTAB xj1 rj1 pj1 where
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aap = aa #> p
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alphaj = (r <.> r0hat) / (aap <.> r0hat)
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sj = r ^-^ (alphaj .* aap)
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aasj = aa #> sj
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omegaj = (aasj <.> sj) / (aasj <.> aasj)
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xj1 = x ^+^ (alphaj .* p) ^+^ (omegaj .* sj) -- updated solution
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rj1 = sj ^-^ (omegaj .* aasj)
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betaj = (rj1 <.> r0hat)/(r <.> r0hat) * alphaj / omegaj
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pj1 = rj1 ^+^ (betaj .* (p ^-^ (omegaj .* aap)))
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```
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**Purpose**: Performs one iteration step of the BiCGSTAB algorithm
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---
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### 4. Moore-Penrose Pseudoinverse
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#### `pinv`
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**Lines**: 980-985 (commented)
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```haskell
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pinv :: (LinearSystem v, MatrixRing (MatrixType v), MonadThrow m, MonadIO m) =>
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MatrixType v -> v -> m v
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pinv aa b = (aa #^# aa) <\> atb where
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atb = transpose aa #> b
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```
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**Purpose**: Computes least-squares approximation of a rectangular system using Moore-Penrose pseudoinverse
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**Note**: This function was also removed from the module export list (line 20)
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---
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### 5. IterativeSolver Typeclass
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#### `IterativeSolver` class
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**Lines**: 1027-1030 (commented)
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```haskell
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class IterativeSolver s where
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-- solver ::
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```
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**Purpose**: Placeholder typeclass for iterative solver abstraction (was incomplete)
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---
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## Summary Statistics
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- **Total functions commented out**: 10
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- BCG-related: 2 functions
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- CGS-related: 2 functions
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- BiCGSTAB-related: 2 functions
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- Pseudoinverse: 1 function
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- Typeclass: 1 class definition
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- Show instances: 3 instances (for BCG, CGS, BICGSTAB)
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## Reason for Commenting Out
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All these functions were commented out because they triggered the `-Wunused-top-binds` warning under `-Wall -Werror` compilation. While these are sophisticated iterative solver implementations that could be valuable for solving sparse linear systems, they were not currently used anywhere in the codebase.
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## Recommendations for Re-enabling
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To re-enable these functions in the future:
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1. **Export them from the module** - Add them to the export list in the module header
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2. **Use them in examples or tests** - Create usage examples demonstrating their functionality
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3. **Document them properly** - Add comprehensive Haddock documentation
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4. **Add to the public API** - If they're meant to be part of the public API, ensure they're properly exposed
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## Related Data Types
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The following data types remain active and are used by the commented-out functions:
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- `data BCG a = BCG { _xBcg, _rBcg, _rHatBcg, _pBcg, _pHatBcg :: SpVector a }`
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- `data CGS a = CGS { _x, _r, _p, _u :: SpVector a}`
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- `data BICGSTAB a = BICGSTAB { _xBicgstab, _rBicgstab, _pBicgstab :: SpVector a}`
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These data types could be commented out as well if they're truly unused, but they've been retained in case they're referenced elsewhere or needed for the future implementation of these solvers.

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