eachPatternItem() — react Function Reference

Architecture documentation for the eachPatternItem() function in visitors.ts from the react codebase.

Function typescript MIRInfrastructure HIR calls 1 called by 1

Entity Profile

MIRInfrastructure→ HIR→ eachPatternItem() — react Function Reference

Dependency Diagram

graph TD
  13924a9d_e73a_6d54_de57_dd59bb471df1["eachPatternItem()"]
  2f3caf55_cc64_415c_55dd_9771ba7dc210["visitors.ts"]
  13924a9d_e73a_6d54_de57_dd59bb471df1 -->|defined in| 2f3caf55_cc64_415c_55dd_9771ba7dc210
  a00426de_5aa3_d680_a1fe_29201ff58984["computeSignatureForInstruction()"]
  a00426de_5aa3_d680_a1fe_29201ff58984 -->|calls| 13924a9d_e73a_6d54_de57_dd59bb471df1
  d7fde76c_4fd9_feb3_299b_798689f05bc6["assertExhaustive()"]
  13924a9d_e73a_6d54_de57_dd59bb471df1 -->|calls| d7fde76c_4fd9_feb3_299b_798689f05bc6
  style 13924a9d_e73a_6d54_de57_dd59bb471df1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/HIR/visitors.ts lines 375–418

export function* eachPatternItem(
  pattern: Pattern,
): Iterable<Place | SpreadPattern> {
  switch (pattern.kind) {
    case 'ArrayPattern': {
      for (const item of pattern.items) {
        if (item.kind === 'Identifier') {
          yield item;
        } else if (item.kind === 'Spread') {
          yield item;
        } else if (item.kind === 'Hole') {
          continue;
        } else {
          assertExhaustive(
            item,
            `Unexpected item kind \`${(item as any).kind}\``,
          );
        }
      }
      break;
    }
    case 'ObjectPattern': {
      for (const property of pattern.properties) {
        if (property.kind === 'ObjectProperty') {
          yield property.place;
        } else if (property.kind === 'Spread') {
          yield property;
        } else {
          assertExhaustive(
            property,
            `Unexpected item kind \`${(property as any).kind}\``,
          );
        }
      }
      break;
    }
    default: {
      assertExhaustive(
        pattern,
        `Unexpected pattern kind \`${(pattern as any).kind}\``,
      );
    }
  }
}