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printConcrete() — react Function Reference

Architecture documentation for the printConcrete() function in Types.ts from the react codebase.

Function typescript BabelCompiler Validation calls 2 called by 4

Entity Profile

Dependency Diagram

graph TD
  c0b647d9_982f_2dc6_de63_c350aa5665d4["printConcrete()"]
  912702ee_f06e_77d9_d237_a41c50607cdf["Types.ts"]
  c0b647d9_982f_2dc6_de63_c350aa5665d4 -->|defined in| 912702ee_f06e_77d9_d237_a41c50607cdf
  17f69d0d_e4c0_8640_3524_a834e66c3fee["printUnificationError()"]
  17f69d0d_e4c0_8640_3524_a834e66c3fee -->|calls| c0b647d9_982f_2dc6_de63_c350aa5665d4
  5b033808_ef9f_1c72_998b_14de0ddb4423["substitute()"]
  5b033808_ef9f_1c72_998b_14de0ddb4423 -->|calls| c0b647d9_982f_2dc6_de63_c350aa5665d4
  38999144_d544_edc0_6efe_18d9bf834ada["printType()"]
  38999144_d544_edc0_6efe_18d9bf834ada -->|calls| c0b647d9_982f_2dc6_de63_c350aa5665d4
  083068a4_661f_1478_1674_e6ffb5dd6334["printResolved()"]
  083068a4_661f_1478_1674_e6ffb5dd6334 -->|calls| c0b647d9_982f_2dc6_de63_c350aa5665d4
  38999144_d544_edc0_6efe_18d9bf834ada["printType()"]
  c0b647d9_982f_2dc6_de63_c350aa5665d4 -->|calls| 38999144_d544_edc0_6efe_18d9bf834ada
  d7fde76c_4fd9_feb3_299b_798689f05bc6["assertExhaustive()"]
  c0b647d9_982f_2dc6_de63_c350aa5665d4 -->|calls| d7fde76c_4fd9_feb3_299b_798689f05bc6
  style c0b647d9_982f_2dc6_de63_c350aa5665d4 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/Flood/Types.ts lines 194–260

export function printConcrete<T>(
  type: ConcreteType<T>,
  printType: (_: T) => string,
): string {
  switch (type.kind) {
    case 'Mixed':
      return 'mixed';
    case 'Number':
      return 'number';
    case 'String':
      return 'string';
    case 'Boolean':
      return 'boolean';
    case 'Void':
      return 'void';
    case 'Nullable':
      return `${printType(type.type)} | void`;
    case 'Array':
      return `Array<${printType(type.element)}>`;
    case 'Set':
      return `Set<${printType(type.element)}>`;
    case 'Map':
      return `Map<${printType(type.key)}, ${printType(type.value)}>`;
    case 'Function': {
      const typeParams = type.typeParameters
        ? `<${type.typeParameters.map(tp => `T${tp}`).join(', ')}>`
        : '';
      const params = type.params.map(printType).join(', ');
      const returnType = printType(type.returnType);
      return `${typeParams}(${params}) => ${returnType}`;
    }
    case 'Component': {
      const params = [...type.props.entries()]
        .map(([k, v]) => `${k}: ${printType(v)}`)
        .join(', ');
      const comma = type.children != null && type.props.size > 0 ? ', ' : '';
      const children =
        type.children != null ? `children: ${printType(type.children)}` : '';
      return `component (${params}${comma}${children})`;
    }
    case 'Generic':
      return `T${type.id}`;
    case 'Object': {
      const name = `Object [${[...type.members.keys()].map(key => JSON.stringify(key)).join(', ')}]`;
      return `${name}`;
    }
    case 'Tuple': {
      const name = `Tuple ${type.members}`;
      return `${name}`;
    }
    case 'Structural': {
      const name = `Structural ${type.id}`;
      return `${name}`;
    }
    case 'Enum': {
      return 'TODO enum printing';
    }
    case 'Union': {
      return type.members.map(printType).join(' | ');
    }
    case 'Instance': {
      return type.name;
    }
    default:
      assertExhaustive(type, `Unknown type: ${JSON.stringify(type)}`);
  }
}

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Frequently Asked Questions

What does printConcrete() do?
printConcrete() is a function in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/Flood/Types.ts.
Where is printConcrete() defined?
printConcrete() is defined in compiler/packages/babel-plugin-react-compiler/src/Flood/Types.ts at line 194.
What does printConcrete() call?
printConcrete() calls 2 function(s): assertExhaustive, printType.
What calls printConcrete()?
printConcrete() is called by 4 function(s): printResolved, printType, printUnificationError, substitute.

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