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mapTerminalSuccessors() — react Function Reference

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

Function typescript MIRInfrastructure HIR calls 2 called by 3

Entity Profile

Dependency Diagram

graph TD
  1e59d6f3_b074_b12f_86b8_b6d2fe62021a["mapTerminalSuccessors()"]
  2f3caf55_cc64_415c_55dd_9771ba7dc210["visitors.ts"]
  1e59d6f3_b074_b12f_86b8_b6d2fe62021a -->|defined in| 2f3caf55_cc64_415c_55dd_9771ba7dc210
  ce70693f_ea04_ec00_ebf7_471842f5db19["assertTerminalSuccessorsExist()"]
  ce70693f_ea04_ec00_ebf7_471842f5db19 -->|calls| 1e59d6f3_b074_b12f_86b8_b6d2fe62021a
  00391787_ef55_81af_824a_4d0b6e524ba2["_shrink()"]
  00391787_ef55_81af_824a_4d0b6e524ba2 -->|calls| 1e59d6f3_b074_b12f_86b8_b6d2fe62021a
  8469c07f_bb75_970a_4a16_a21afba094e1["alignReactiveScopesToBlockScopesHIR()"]
  8469c07f_bb75_970a_4a16_a21afba094e1 -->|calls| 1e59d6f3_b074_b12f_86b8_b6d2fe62021a
  d0270ab6_a621_bd55_a1b9_a5cad8b406b2["makeInstructionId()"]
  1e59d6f3_b074_b12f_86b8_b6d2fe62021a -->|calls| d0270ab6_a621_bd55_a1b9_a5cad8b406b2
  d7fde76c_4fd9_feb3_299b_798689f05bc6["assertExhaustive()"]
  1e59d6f3_b074_b12f_86b8_b6d2fe62021a -->|calls| d7fde76c_4fd9_feb3_299b_798689f05bc6
  style 1e59d6f3_b074_b12f_86b8_b6d2fe62021a fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/HIR/visitors.ts lines 708–960

export function mapTerminalSuccessors(
  terminal: Terminal,
  fn: (block: BlockId) => BlockId,
): Terminal {
  switch (terminal.kind) {
    case 'goto': {
      const target = fn(terminal.block);
      return {
        kind: 'goto',
        block: target,
        variant: terminal.variant,
        id: makeInstructionId(0),
        loc: terminal.loc,
      };
    }
    case 'if': {
      const consequent = fn(terminal.consequent);
      const alternate = fn(terminal.alternate);
      const fallthrough = fn(terminal.fallthrough);
      return {
        kind: 'if',
        test: terminal.test,
        consequent,
        alternate,
        fallthrough,
        id: makeInstructionId(0),
        loc: terminal.loc,
      };
    }
    case 'branch': {
      const consequent = fn(terminal.consequent);
      const alternate = fn(terminal.alternate);
      const fallthrough = fn(terminal.fallthrough);
      return {
        kind: 'branch',
        test: terminal.test,
        consequent,
        alternate,
        fallthrough,
        id: makeInstructionId(0),
        loc: terminal.loc,
      };
    }
    case 'switch': {
      const cases = terminal.cases.map(case_ => {
        const target = fn(case_.block);
        return {
          test: case_.test,
          block: target,
        };
      });
      const fallthrough = fn(terminal.fallthrough);
      return {
        kind: 'switch',
        test: terminal.test,
        cases,
        fallthrough,
        id: makeInstructionId(0),
        loc: terminal.loc,
      };
    }
    case 'logical': {
      const test = fn(terminal.test);
      const fallthrough = fn(terminal.fallthrough);
      return {
        kind: 'logical',
        test,
        fallthrough,
        operator: terminal.operator,
        id: makeInstructionId(0),
        loc: terminal.loc,
      };
    }
    case 'ternary': {
      const test = fn(terminal.test);
      const fallthrough = fn(terminal.fallthrough);
      return {
        kind: 'ternary',
        test,
        fallthrough,
        id: makeInstructionId(0),

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Frequently Asked Questions

What does mapTerminalSuccessors() do?
mapTerminalSuccessors() is a function in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/HIR/visitors.ts.
Where is mapTerminalSuccessors() defined?
mapTerminalSuccessors() is defined in compiler/packages/babel-plugin-react-compiler/src/HIR/visitors.ts at line 708.
What does mapTerminalSuccessors() call?
mapTerminalSuccessors() calls 2 function(s): assertExhaustive, makeInstructionId.
What calls mapTerminalSuccessors()?
mapTerminalSuccessors() is called by 3 function(s): _shrink, alignReactiveScopesToBlockScopesHIR, assertTerminalSuccessorsExist.

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