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mayAllocate() — react Function Reference

Architecture documentation for the mayAllocate() function in InferReactiveScopeVariables.ts from the react codebase.

Function typescript BabelCompiler Validation calls 2 called by 1

Entity Profile

Dependency Diagram

graph TD
  25afae47_3217_0d09_3179_995552e8b339["mayAllocate()"]
  f041318d_301f_daad_4198_91d141b3039d["InferReactiveScopeVariables.ts"]
  25afae47_3217_0d09_3179_995552e8b339 -->|defined in| f041318d_301f_daad_4198_91d141b3039d
  b474edef_a60d_b132_2ae0_98f6768ec241["findDisjointMutableValues()"]
  b474edef_a60d_b132_2ae0_98f6768ec241 -->|calls| 25afae47_3217_0d09_3179_995552e8b339
  f4ce4a75_9bb6_f3be_c3c6_eb60cb87ce0e["doesPatternContainSpreadElement()"]
  25afae47_3217_0d09_3179_995552e8b339 -->|calls| f4ce4a75_9bb6_f3be_c3c6_eb60cb87ce0e
  d7fde76c_4fd9_feb3_299b_798689f05bc6["assertExhaustive()"]
  25afae47_3217_0d09_3179_995552e8b339 -->|calls| d7fde76c_4fd9_feb3_299b_798689f05bc6
  style 25afae47_3217_0d09_3179_995552e8b339 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/InferReactiveScopeVariables.ts lines 209–270

function mayAllocate(_env: Environment, instruction: Instruction): boolean {
  const {value} = instruction;
  switch (value.kind) {
    case 'Destructure': {
      return doesPatternContainSpreadElement(value.lvalue.pattern);
    }
    case 'PostfixUpdate':
    case 'PrefixUpdate':
    case 'Await':
    case 'DeclareLocal':
    case 'DeclareContext':
    case 'StoreLocal':
    case 'LoadGlobal':
    case 'MetaProperty':
    case 'TypeCastExpression':
    case 'LoadLocal':
    case 'LoadContext':
    case 'StoreContext':
    case 'PropertyDelete':
    case 'ComputedLoad':
    case 'ComputedDelete':
    case 'JSXText':
    case 'TemplateLiteral':
    case 'Primitive':
    case 'GetIterator':
    case 'IteratorNext':
    case 'NextPropertyOf':
    case 'Debugger':
    case 'StartMemoize':
    case 'FinishMemoize':
    case 'UnaryExpression':
    case 'BinaryExpression':
    case 'PropertyLoad':
    case 'StoreGlobal': {
      return false;
    }
    case 'TaggedTemplateExpression':
    case 'CallExpression':
    case 'MethodCall': {
      return instruction.lvalue.identifier.type.kind !== 'Primitive';
    }
    case 'RegExpLiteral':
    case 'PropertyStore':
    case 'ComputedStore':
    case 'ArrayExpression':
    case 'JsxExpression':
    case 'JsxFragment':
    case 'NewExpression':
    case 'ObjectExpression':
    case 'UnsupportedNode':
    case 'ObjectMethod':
    case 'FunctionExpression': {
      return true;
    }
    default: {
      assertExhaustive(
        value,
        `Unexpected value kind \`${(value as any).kind}\``,
      );
    }
  }
}

Domain

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Frequently Asked Questions

What does mayAllocate() do?
mayAllocate() is a function in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/InferReactiveScopeVariables.ts.
Where is mayAllocate() defined?
mayAllocate() is defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/InferReactiveScopeVariables.ts at line 209.
What does mayAllocate() call?
mayAllocate() calls 2 function(s): assertExhaustive, doesPatternContainSpreadElement.
What calls mayAllocate()?
mayAllocate() is called by 1 function(s): findDisjointMutableValues.

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