CallExpression()

in packages/metro/src/ModuleGraph/output/reverse-dependency-map-references.js [34:71]

• 30 lines of code
• 7 McCabe index (conditional complexity)

      CallExpression(path: NodePath<CallExpression>, state: State) {
        const {node} = path;

        if (node.callee.name === `${state.opts.globalPrefix}__d`) {
          // $FlowFixMe Flow error uncovered by typing Babel more strictly
          const lastArg = node.arguments[0].params.slice(-1)[0];
          // $FlowFixMe Flow error uncovered by typing Babel more strictly
          const depMapName: ?string = lastArg && lastArg.name;

          if (depMapName == null) {
            return;
          }

          const body = path.get('arguments.0.body');
          invariant(
            !Array.isArray(body),
            'meetro: Expected `body` to be a single path.',
          );

          const scope = body.scope;
          const binding = nullthrows(scope.getBinding(depMapName));

          binding.referencePaths.forEach(({parentPath}) => {
            const memberNode = parentPath?.node;

            if (
              memberNode != null &&
              memberNode.type === 'MemberExpression' &&
              memberNode.property.type === 'NumericLiteral'
            ) {
              const numericLiteral = t.numericLiteral(
                state.opts.dependencyIds[memberNode.property.value],
              );
              nullthrows(parentPath).replaceWith(numericLiteral);
            }
          });
        }
      },