Struct FlowGraph 

pub struct FlowGraph {
    pub name: String,
    pub target: FlowTarget,
    pub workgroup_size: Option<u32>,
    pub inputs: Vec<FlowInput>,
    pub nodes: Vec<FlowNode>,
    pub outputs: Vec<FlowOutput>,
    pub topo_order: Vec<usize>,
    pub steps: Vec<FlowStep>,
    pub chains: Vec<FlowChain>,
    pub uses: Vec<FlowUse>,
}

A parsed @flow block — the DAG intermediate representation

Fields

name: String

Name of the flow (referenced by CSS flow: name)

target: FlowTarget

Target pipeline: fragment shader or compute shader

workgroup_size: Option<u32>

Workgroup size for compute flows (default: 64)

inputs: Vec<FlowInput>

Input declarations (builtins, buffers, CSS properties)

nodes: Vec<FlowNode>

Processing nodes (the DAG vertices)

outputs: Vec<FlowOutput>

Output declarations (what the flow produces)

topo_order: Vec<usize>

Cached topological order (node indices, set after validation)

steps: Vec<FlowStep>

Semantic step declarations (expanded to nodes during validation)

chains: Vec<FlowChain>

Chain declarations (desugared to steps, then expanded to nodes)

uses: Vec<FlowUse>

Composition imports (inlined during validation)

Implementations

impl FlowGraph

pub fn new(name: impl Into<String>) -> Self

Create a new empty flow graph

impl FlowGraph

pub fn validate( &mut self, flow_registry: Option<&HashMap<String, FlowGraph>>, ) -> Result<(), Vec<FlowError>>

Validate the flow graph: detect cycles, check types, resolve references.

On success, populates topo_order with node indices in dependency order. On failure, returns all errors found.

Pass a flow registry for use resolution. Pass None for standalone validation.

pub fn validate_standalone(&mut self) -> Result<(), Vec<FlowError>>

Convenience: validate without a flow registry (no use support).

Trait Implementations

impl Clone for FlowGraph

fn clone(&self) -> FlowGraph

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FlowGraph

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.