Crate spectrafit_graph 

spectrafit-graph — DAG compilation and evaluation engine.

Exposes three top-level functions consumed by the solver and pyo3 bindings:

• evaluate — sum of all node contributions at given x-points
• evaluate_components — per-node contributions
• jacobian — full analytical Jacobian matrix [n_points × n_free_params]

Structs

CompiledGraph

The compiled representation of a FitGraphSpec, ready for evaluation.

TiedParam

A single tied-parameter assignment: target = expr.

TiedPlan

A dependency-ordered plan for evaluating tied parameters.

Enums

BinOp

A binary arithmetic operator in the restricted grammar.

Expr

Parsed expression abstract syntax tree.

GraphError

Errors produced by the graph compiler and executor.

Functions

evaluate

Evaluate the model sum across all nodes at the given x-points.

evaluate_compiled

Evaluate the model sum at each x-point.

evaluate_compiled_indexed

Evaluate the model sum using pre-computed per-node parameter buffers.

evaluate_components

Evaluate each node independently.

evaluate_components_compiled

Evaluate each node independently.

jacobian

Compute the full analytical Jacobian matrix for use by the solver.

jacobian_compiled

Compute the analytical Jacobian matrix using a pre-built flat param map.

jacobian_compiled_indexed

Compute the analytical Jacobian using pre-computed per-node param buffers.

jacobian_compiled_indexed_into

Compute the analytical Jacobian using a reusable row-major scratch buffer.

jacobian_compiled_indexed_weighted_into

Compute the weighted analytical Jacobian into a reusable row-major buffer.

parse_expr

Parse a restricted-grammar expression string into an Expr AST.

residuals_compiled_indexed_into

Compute weighted residuals r[i] = (ŷ[i] − y[i]) / σ[i] into out using pre-computed per-node parameter buffers. Honours per-node dataset_index scoping for simultaneous multi-dataset fits (a no-op for single-dataset / fully-global graphs).