codegenBlockNoReset() — react Function Reference

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/CodegenReactiveFunction.ts lines 518–575

function codegenBlockNoReset(
  cx: Context,
  block: ReactiveBlock,
): t.BlockStatement {
  const statements: Array<t.Statement> = [];
  for (const item of block) {
    switch (item.kind) {
      case 'instruction': {
        const statement = codegenInstructionNullable(cx, item.instruction);
        if (statement !== null) {
          statements.push(statement);
        }
        break;
      }
      case 'pruned-scope': {
        const scopeBlock = codegenBlockNoReset(cx, item.instructions);
        statements.push(...scopeBlock.body);
        break;
      }
      case 'scope': {
        const temp = new Map(cx.temp);
        codegenReactiveScope(cx, statements, item.scope, item.instructions);
        cx.temp = temp;
        break;
      }
      case 'terminal': {
        const statement = codegenTerminal(cx, item.terminal);
        if (statement === null) {
          break;
        }
        if (item.label !== null && !item.label.implicit) {
          const block =
            statement.type === 'BlockStatement' && statement.body.length === 1
              ? statement.body[0]
              : statement;
          statements.push(
            t.labeledStatement(
              t.identifier(codegenLabel(item.label.id)),
              block,
            ),
          );
        } else if (statement.type === 'BlockStatement') {
          statements.push(...statement.body);
        } else {
          statements.push(statement);
        }
        break;
      }
      default: {
        assertExhaustive(
          item,
          `Unexpected item kind \`${(item as any).kind}\``,
        );
      }
    }
  }
  return t.blockStatement(statements);
}