QCDLab · Radonirinaunimi · Aug 8, 2025 · Aug 6, 2025 · Aug 7, 2025 · Aug 7, 2025
diff --git a/docs/development-with-pixi.md b/docs/development-with-pixi.md
@@ -426,16 +426,3 @@ pixi run cargo publish --manifest-path neopdf/Cargo.toml
 # Publish Python package
 pixi run maturin upload --manifest-path neopdf_pyapi/Cargo.toml target/wheels/*
 ```
-
----
-
-## Additional Resources
-
-- [Pixi Documentation](https://pixi.sh/latest/)
-- [Rust Book](https://doc.rust-lang.org/book/)
-- [PyO3 Documentation](https://pyo3.rs/)
-- [Cargo-c Documentation](https://crates.io/crates/cargo-c)
-- [Maturin Documentation](https://www.maturin.rs/)
-
-For more information about `NeoPDF` development, see the [Design and Features](./design-and-features.md)
-documentation.
diff --git a/docs/index.md b/docs/index.md
@@ -59,7 +59,15 @@ widely used, have limitations in terms of extensibility and features. `NeoPDF` a
 - **[CLI Tutorials](./cli-tutorials.md)**: Learn how to use the command-line interface
 - **[Examples](./examples/)**: Code examples for Python, C++, C, and Fortran APIs
 
-## Source Code & Bug Report
+---
 
-- [GitHub Repository](https://github.com/radonirinaunimi/neopdf)
-- Issues and feature requests welcome!
+## Additional Resources
+
+- [Pixi Documentation](https://pixi.sh/latest/)
+- [Rust Book](https://doc.rust-lang.org/book/)
+- [PyO3 Documentation](https://pyo3.rs/)
+- [Cargo-c Documentation](https://crates.io/crates/cargo-c)
+- [Maturin Documentation](https://www.maturin.rs/)
+
+For more information about `NeoPDF` development, see the [Design and Features](./design-and-features.md)
+documentation.
diff --git a/neopdf_capi/tests/check-capi.cpp b/neopdf_capi/tests/check-capi.cpp
@@ -223,9 +223,8 @@ int main() {
     // Test loading all the PDF members
     test_all_pdf_members();
 
-    // TODO: Add the NeoPDF set to the container in order for this to run.
     // Test lazy loading of PDF members
-    // test_lazy_loading();
+    test_lazy_loading();
 
     return EXIT_SUCCESS;
 }
diff --git a/neopdf_capi/tests/check-capi.output b/neopdf_capi/tests/check-capi.output
@@ -440113,3 +440113,112 @@ Statistics across all members:
 Mean: 1.42541543e+00
 Std Dev: 2.82655375e-01
 Relative Std Dev: 1.98296839e-01
+=== Test Lazy Loading of PDF Members ===
+Successfully loaded lazy iterator for NNPDF40_nnlo_as_01180
+
+Evaluating xfxQ2 for pid=1, x=1.00000000e-09, Q2=2.72250000e+00 across all members (lazily):
+  Member         LHAPDF         NeoPDF     Rel. Diff.
+-----------------------------------------------------
+       0 1.42541540e+00 1.42541540e+00 0.00000000e+00
+       1 1.28310830e+00 1.28310830e+00 0.00000000e+00
+       2 1.24648150e+00 1.24648150e+00 0.00000000e+00
+       3 1.48007830e+00 1.48007830e+00 0.00000000e+00
+       4 2.00118680e+00 2.00118680e+00 0.00000000e+00
+       5 1.94587930e+00 1.94587930e+00 0.00000000e+00
+       6 2.01315070e+00 2.01315070e+00 0.00000000e+00
+       7 1.73958930e+00 1.73958930e+00 0.00000000e+00
+       8 1.64001710e+00 1.64001710e+00 0.00000000e+00
+       9 1.87880250e+00 1.87880250e+00 0.00000000e+00
+      10 9.94812780e-01 9.94812780e-01 0.00000000e+00
+      11 1.24554390e+00 1.24554390e+00 0.00000000e+00
+      12 1.53881200e+00 1.53881200e+00 0.00000000e+00
+      13 1.90481180e+00 1.90481180e+00 0.00000000e+00
+      14 1.35892930e+00 1.35892930e+00 0.00000000e+00
+      15 1.67742320e+00 1.67742320e+00 0.00000000e+00
+      16 1.19951660e+00 1.19951660e+00 0.00000000e+00
+      17 2.01186040e+00 2.01186040e+00 0.00000000e+00
+      18 8.77923840e-01 8.77923840e-01 0.00000000e+00
+      19 1.39693710e+00 1.39693710e+00 0.00000000e+00
+      20 1.58166250e+00 1.58166250e+00 0.00000000e+00
+      21 1.30415690e+00 1.30415690e+00 0.00000000e+00
+      22 1.46281290e+00 1.46281290e+00 0.00000000e+00
+      23 1.39477730e+00 1.39477730e+00 0.00000000e+00
+      24 1.30934740e+00 1.30934740e+00 0.00000000e+00
+      25 1.47699570e+00 1.47699570e+00 0.00000000e+00
+      26 1.32462930e+00 1.32462930e+00 0.00000000e+00
+      27 1.39440600e+00 1.39440600e+00 0.00000000e+00
+      28 9.00165850e-01 9.00165850e-01 0.00000000e+00
+      29 1.39276130e+00 1.39276130e+00 0.00000000e+00
+      30 1.45169690e+00 1.45169690e+00 0.00000000e+00
+      31 1.73044690e+00 1.73044690e+00 0.00000000e+00
+      32 1.12628440e+00 1.12628440e+00 0.00000000e+00
+      33 1.83265990e+00 1.83265990e+00 0.00000000e+00
+      34 1.44063440e+00 1.44063440e+00 0.00000000e+00
+      35 1.66159840e+00 1.66159840e+00 0.00000000e+00
+      36 1.37628450e+00 1.37628450e+00 0.00000000e+00
+      37 1.04626240e+00 1.04626240e+00 0.00000000e+00
+      38 1.16326380e+00 1.16326380e+00 0.00000000e+00
+      39 1.34427000e+00 1.34427000e+00 0.00000000e+00
+      40 1.07978740e+00 1.07978740e+00 0.00000000e+00
+      41 1.37272760e+00 1.37272760e+00 0.00000000e+00
+      42 1.73826560e+00 1.73826560e+00 0.00000000e+00
+      43 3.59445390e-01 3.59445390e-01 0.00000000e+00
+      44 1.18493000e+00 1.18493000e+00 0.00000000e+00
+      45 7.99628970e-01 7.99628970e-01 0.00000000e+00
+      46 1.55006810e+00 1.55006810e+00 0.00000000e+00
+      47 2.01700900e+00 2.01700900e+00 0.00000000e+00
+      48 1.24464830e+00 1.24464830e+00 0.00000000e+00
+      49 1.05926120e+00 1.05926120e+00 0.00000000e+00
+      50 1.34637890e+00 1.34637890e+00 0.00000000e+00
+      51 1.86542200e+00 1.86542200e+00 0.00000000e+00
+      52 1.56982910e+00 1.56982910e+00 0.00000000e+00
+      53 1.15230920e+00 1.15230920e+00 0.00000000e+00
+      54 1.28064420e+00 1.28064420e+00 0.00000000e+00
+      55 1.54869390e+00 1.54869390e+00 0.00000000e+00
+      56 1.57082160e+00 1.57082160e+00 0.00000000e+00
+      57 1.44521140e+00 1.44521140e+00 0.00000000e+00
+      58 1.53817640e+00 1.53817640e+00 0.00000000e+00
+      59 1.69237530e+00 1.69237530e+00 0.00000000e+00
+      60 1.27139630e+00 1.27139630e+00 0.00000000e+00
+      61 1.73865260e+00 1.73865260e+00 0.00000000e+00
+      62 1.14424360e+00 1.14424360e+00 0.00000000e+00
+      63 1.44268230e+00 1.44268230e+00 0.00000000e+00
+      64 1.28023720e+00 1.28023720e+00 0.00000000e+00
+      65 1.60165700e+00 1.60165700e+00 0.00000000e+00
+      66 1.04626240e+00 1.04626240e+00 0.00000000e+00
+      67 1.16441480e+00 1.16441480e+00 0.00000000e+00
+      68 1.41341290e+00 1.41341290e+00 0.00000000e+00
+      69 1.58258270e+00 1.58258270e+00 0.00000000e+00
+      70 1.20533680e+00 1.20533680e+00 0.00000000e+00
+      71 1.43851600e+00 1.43851600e+00 0.00000000e+00
+      72 1.49413510e+00 1.49413510e+00 0.00000000e+00
+      73 1.53866190e+00 1.53866190e+00 0.00000000e+00
+      74 1.38659170e+00 1.38659170e+00 0.00000000e+00
+      75 1.61133190e+00 1.61133190e+00 0.00000000e+00
+      76 1.43125020e+00 1.43125020e+00 0.00000000e+00
+      77 1.20365080e+00 1.20365080e+00 0.00000000e+00
+      78 1.25475130e+00 1.25475130e+00 0.00000000e+00
+      79 1.48319610e+00 1.48319610e+00 0.00000000e+00
+      80 1.75233480e+00 1.75233480e+00 0.00000000e+00
+      81 1.76230480e+00 1.76230480e+00 0.00000000e+00
+      82 1.38272320e+00 1.38272320e+00 0.00000000e+00
+      83 1.54763630e+00 1.54763630e+00 0.00000000e+00
+      84 1.70718440e+00 1.70718440e+00 0.00000000e+00
+      85 1.39041830e+00 1.39041830e+00 0.00000000e+00
+      86 1.05842140e+00 1.05842140e+00 0.00000000e+00
+      87 1.50258870e+00 1.50258870e+00 0.00000000e+00
+      88 1.34099640e+00 1.34099640e+00 0.00000000e+00
+      89 1.32557380e+00 1.32557380e+00 0.00000000e+00
+      90 1.39426300e+00 1.39426300e+00 0.00000000e+00
+      91 1.54469430e+00 1.54469430e+00 0.00000000e+00
+      92 1.06132340e+00 1.06132340e+00 0.00000000e+00
+      93 1.45966680e+00 1.45966680e+00 0.00000000e+00
+      94 1.46429390e+00 1.46429390e+00 0.00000000e+00
+      95 1.39241350e+00 1.39241350e+00 0.00000000e+00
+      96 8.79929950e-01 8.79929950e-01 0.00000000e+00
+      97 1.41834220e+00 1.41834220e+00 0.00000000e+00
+      98 1.55531500e+00 1.55531500e+00 0.00000000e+00
+      99 1.76796650e+00 1.76796650e+00 0.00000000e+00
+     100 1.53457410e+00 1.53457410e+00 0.00000000e+00
+
+Successfully iterated through all members lazily.
diff --git a/neopdf_capi/tests/check-oop.cpp b/neopdf_capi/tests/check-oop.cpp
@@ -262,9 +262,8 @@ int main() {
     // Test the PDF interpolations by loading all the members
     test_all_pdf_members();
 
-    // TODO: Add the NeoPDF set to the container to in order for this to run.
     // Test the lazy loading of PDF members
-    // test_lazy_loading();
+    test_lazy_loading();
 
     return EXIT_SUCCESS;
 }
diff --git a/neopdf_capi/tests/check-oop.output b/neopdf_capi/tests/check-oop.output
@@ -440614,3 +440614,110 @@ Statistics across all members:
 Mean: 1.42541543e+00
 Std Dev: 2.82655375e-01
 Relative Std Dev: 1.98296839e-01
+=== Test NeoPDFLazy class (lazy loading) ===
+Initialized lazy loader for NNPDF40_nnlo_as_01180.neopdf.lz4
+  Member         LHAPDF         NeoPDF     Rel. Diff.
+-----------------------------------------------------
+       0 1.42541540e+00 1.42541540e+00 0.00000000e+00
+       1 1.28310830e+00 1.28310830e+00 0.00000000e+00
+       2 1.24648150e+00 1.24648150e+00 0.00000000e+00
+       3 1.48007830e+00 1.48007830e+00 0.00000000e+00
+       4 2.00118680e+00 2.00118680e+00 0.00000000e+00
+       5 1.94587930e+00 1.94587930e+00 0.00000000e+00
+       6 2.01315070e+00 2.01315070e+00 0.00000000e+00
+       7 1.73958930e+00 1.73958930e+00 0.00000000e+00
+       8 1.64001710e+00 1.64001710e+00 0.00000000e+00
+       9 1.87880250e+00 1.87880250e+00 0.00000000e+00
+      10 9.94812780e-01 9.94812780e-01 0.00000000e+00
+      11 1.24554390e+00 1.24554390e+00 0.00000000e+00
+      12 1.53881200e+00 1.53881200e+00 0.00000000e+00
+      13 1.90481180e+00 1.90481180e+00 0.00000000e+00
+      14 1.35892930e+00 1.35892930e+00 0.00000000e+00
+      15 1.67742320e+00 1.67742320e+00 0.00000000e+00
+      16 1.19951660e+00 1.19951660e+00 0.00000000e+00
+      17 2.01186040e+00 2.01186040e+00 0.00000000e+00
+      18 8.77923840e-01 8.77923840e-01 0.00000000e+00
+      19 1.39693710e+00 1.39693710e+00 0.00000000e+00
+      20 1.58166250e+00 1.58166250e+00 0.00000000e+00
+      21 1.30415690e+00 1.30415690e+00 0.00000000e+00
+      22 1.46281290e+00 1.46281290e+00 0.00000000e+00
+      23 1.39477730e+00 1.39477730e+00 0.00000000e+00
+      24 1.30934740e+00 1.30934740e+00 0.00000000e+00
+      25 1.47699570e+00 1.47699570e+00 0.00000000e+00
+      26 1.32462930e+00 1.32462930e+00 0.00000000e+00
+      27 1.39440600e+00 1.39440600e+00 0.00000000e+00
+      28 9.00165850e-01 9.00165850e-01 0.00000000e+00
+      29 1.39276130e+00 1.39276130e+00 0.00000000e+00
+      30 1.45169690e+00 1.45169690e+00 0.00000000e+00
+      31 1.73044690e+00 1.73044690e+00 0.00000000e+00
+      32 1.12628440e+00 1.12628440e+00 0.00000000e+00
+      33 1.83265990e+00 1.83265990e+00 0.00000000e+00
+      34 1.44063440e+00 1.44063440e+00 0.00000000e+00
+      35 1.66159840e+00 1.66159840e+00 0.00000000e+00
+      36 1.37628450e+00 1.37628450e+00 0.00000000e+00
+      37 1.04626240e+00 1.04626240e+00 0.00000000e+00
+      38 1.16326380e+00 1.16326380e+00 0.00000000e+00
+      39 1.34427000e+00 1.34427000e+00 0.00000000e+00
+      40 1.07978740e+00 1.07978740e+00 0.00000000e+00
+      41 1.37272760e+00 1.37272760e+00 0.00000000e+00
+      42 1.73826560e+00 1.73826560e+00 0.00000000e+00
+      43 3.59445390e-01 3.59445390e-01 0.00000000e+00
+      44 1.18493000e+00 1.18493000e+00 0.00000000e+00
+      45 7.99628970e-01 7.99628970e-01 0.00000000e+00
+      46 1.55006810e+00 1.55006810e+00 0.00000000e+00
+      47 2.01700900e+00 2.01700900e+00 0.00000000e+00
+      48 1.24464830e+00 1.24464830e+00 0.00000000e+00
+      49 1.05926120e+00 1.05926120e+00 0.00000000e+00
+      50 1.34637890e+00 1.34637890e+00 0.00000000e+00
+      51 1.86542200e+00 1.86542200e+00 0.00000000e+00
+      52 1.56982910e+00 1.56982910e+00 0.00000000e+00
+      53 1.15230920e+00 1.15230920e+00 0.00000000e+00
+      54 1.28064420e+00 1.28064420e+00 0.00000000e+00
+      55 1.54869390e+00 1.54869390e+00 0.00000000e+00
+      56 1.57082160e+00 1.57082160e+00 0.00000000e+00
+      57 1.44521140e+00 1.44521140e+00 0.00000000e+00
+      58 1.53817640e+00 1.53817640e+00 0.00000000e+00
+      59 1.69237530e+00 1.69237530e+00 0.00000000e+00
+      60 1.27139630e+00 1.27139630e+00 0.00000000e+00
+      61 1.73865260e+00 1.73865260e+00 0.00000000e+00
+      62 1.14424360e+00 1.14424360e+00 0.00000000e+00
+      63 1.44268230e+00 1.44268230e+00 0.00000000e+00
+      64 1.28023720e+00 1.28023720e+00 0.00000000e+00
+      65 1.60165700e+00 1.60165700e+00 0.00000000e+00
+      66 1.04626240e+00 1.04626240e+00 0.00000000e+00
+      67 1.16441480e+00 1.16441480e+00 0.00000000e+00
+      68 1.41341290e+00 1.41341290e+00 0.00000000e+00
+      69 1.58258270e+00 1.58258270e+00 0.00000000e+00
+      70 1.20533680e+00 1.20533680e+00 0.00000000e+00
+      71 1.43851600e+00 1.43851600e+00 0.00000000e+00
+      72 1.49413510e+00 1.49413510e+00 0.00000000e+00
+      73 1.53866190e+00 1.53866190e+00 0.00000000e+00
+      74 1.38659170e+00 1.38659170e+00 0.00000000e+00
+      75 1.61133190e+00 1.61133190e+00 0.00000000e+00
+      76 1.43125020e+00 1.43125020e+00 0.00000000e+00
+      77 1.20365080e+00 1.20365080e+00 0.00000000e+00
+      78 1.25475130e+00 1.25475130e+00 0.00000000e+00
+      79 1.48319610e+00 1.48319610e+00 0.00000000e+00
+      80 1.75233480e+00 1.75233480e+00 0.00000000e+00
+      81 1.76230480e+00 1.76230480e+00 0.00000000e+00
+      82 1.38272320e+00 1.38272320e+00 0.00000000e+00
+      83 1.54763630e+00 1.54763630e+00 0.00000000e+00
+      84 1.70718440e+00 1.70718440e+00 0.00000000e+00
+      85 1.39041830e+00 1.39041830e+00 0.00000000e+00
+      86 1.05842140e+00 1.05842140e+00 0.00000000e+00
+      87 1.50258870e+00 1.50258870e+00 0.00000000e+00
+      88 1.34099640e+00 1.34099640e+00 0.00000000e+00
+      89 1.32557380e+00 1.32557380e+00 0.00000000e+00
+      90 1.39426300e+00 1.39426300e+00 0.00000000e+00
+      91 1.54469430e+00 1.54469430e+00 0.00000000e+00
+      92 1.06132340e+00 1.06132340e+00 0.00000000e+00
+      93 1.45966680e+00 1.45966680e+00 0.00000000e+00
+      94 1.46429390e+00 1.46429390e+00 0.00000000e+00
+      95 1.39241350e+00 1.39241350e+00 0.00000000e+00
+      96 8.79929950e-01 8.79929950e-01 0.00000000e+00
+      97 1.41834220e+00 1.41834220e+00 0.00000000e+00
+      98 1.55531500e+00 1.55531500e+00 0.00000000e+00
+      99 1.76796650e+00 1.76796650e+00 0.00000000e+00
+     100 1.53457410e+00 1.53457410e+00 0.00000000e+00
+
+Successfully iterated through all members lazily.
diff --git a/neopdf_fapi/Makefile b/neopdf_fapi/Makefile
@@ -3,7 +3,7 @@ FFLAGS = -Wall -Wextra -O0 -g -ffree-line-length-none
 NEOPDF_LIBS != pkg-config neopdf_capi --libs
 LHAPDF_LIBS != pkg-config lhapdf --libs
 
-PROGRAMS = check-fapi
+PROGRAMS = check-fapi check-lazy-fapi check-writer-fapi
 
 all: $(PROGRAMS)
 

diff --git a/neopdf_fapi/check-lazy-fapi.output b/neopdf_fapi/check-lazy-fapi.output
@@ -0,0 +1,15 @@
+--------------------------
+    Member        NeOPDF
+--------------------------
+         0   1.13226E+00
+         1   1.14743E+00
+         2   1.10990E+00
+         3   1.14187E+00
+         4   1.11390E+00
+         5   1.13719E+00
+         6   1.14899E+00
+         7   1.15309E+00
+         8   1.14448E+00
+         9   1.12533E+00
+        10   1.13197E+00
+--------------------------
diff --git a/neopdf_fapi/check-writer-fapi.output b/neopdf_fapi/check-writer-fapi.output