removeArrayPatternElements() — react Function Reference

Architecture documentation for the removeArrayPatternElements() function in minimize.ts from the react codebase.

Function typescript BabelCompiler Optimization calls 1

Entity Profile

BabelCompiler→ Optimization→ removeArrayPatternElements() — react Function Reference

Dependency Diagram

graph TD
  27003f5d_89b4_ba4d_31a6_0695ab151779["removeArrayPatternElements()"]
  9c061da8_dbf8_4168_823d_991654a3c55d["minimize.ts"]
  27003f5d_89b4_ba4d_31a6_0695ab151779 -->|defined in| 9c061da8_dbf8_4168_823d_991654a3c55d
  7a9af496_ef6a_d9e8_8eaf_1f386f49e4b3["cloneAst()"]
  27003f5d_89b4_ba4d_31a6_0695ab151779 -->|calls| 7a9af496_ef6a_d9e8_8eaf_1f386f49e4b3
  style 27003f5d_89b4_ba4d_31a6_0695ab151779 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/snap/src/minimize.ts lines 1618–1652

function* removeArrayPatternElements(ast: t.File): Generator<t.File> {
  // Collect all array patterns with elements
  const patternSites: Array<{patternIndex: number; elementCount: number}> = [];
  let patternIndex = 0;
  t.traverseFast(ast, node => {
    if (t.isArrayPattern(node) && node.elements.length > 0) {
      patternSites.push({patternIndex, elementCount: node.elements.length});
      patternIndex++;
    }
  });

  // For each pattern, try removing each element (from end to start)
  for (const {patternIndex: targetPatternIdx, elementCount} of patternSites) {
    for (let elemIdx = elementCount - 1; elemIdx >= 0; elemIdx--) {
      const cloned = cloneAst(ast);
      let idx = 0;
      let modified = false;

      t.traverseFast(cloned, node => {
        if (modified) return;
        if (t.isArrayPattern(node) && node.elements.length > 0) {
          if (idx === targetPatternIdx && elemIdx < node.elements.length) {
            node.elements.splice(elemIdx, 1);
            modified = true;
          }
          idx++;
        }
      });

      if (modified) {
        yield cloned;
      }
    }
  }
}