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Writer Class — react Architecture

Architecture documentation for the Writer class in PrintReactiveFunction.ts from the react codebase.

Class typescript BabelCompiler

Entity Profile

Dependency Diagram

graph TD
  b243acad_c177_f3f5_fda5_38b82f61b907["Writer"]
  d77f9ffb_2d12_7d1f_126f_8c05214f0059["PrintReactiveFunction.ts"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|defined in| d77f9ffb_2d12_7d1f_126f_8c05214f0059
  8a52692c_8193_dcb7_9fbe_d7318477cdc3["constructor()"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|method| 8a52692c_8193_dcb7_9fbe_d7318477cdc3
  afa33e13_3155_69d3_5b6a_8a49d72f5cf1["complete()"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|method| afa33e13_3155_69d3_5b6a_8a49d72f5cf1
  08b5ffb9_71a2_1b17_07aa_5fc920192756["append()"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|method| 08b5ffb9_71a2_1b17_07aa_5fc920192756
  134ef693_e561_ad46_e66b_04323b6d08cd["newline()"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|method| 134ef693_e561_ad46_e66b_04323b6d08cd
  ccaebcb0_5128_cdb1_7336_203ff87e3e3c["write()"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|method| ccaebcb0_5128_cdb1_7336_203ff87e3e3c
  d0290dff_c442_0216_dbb6_27657f40b130["writeLine()"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|method| d0290dff_c442_0216_dbb6_27657f40b130
  49a02012_cdfd_58a3_d7f3_fb778e20ab1b["indented()"]
  b243acad_c177_f3f5_fda5_38b82f61b907 -->|method| 49a02012_cdfd_58a3_d7f3_fb778e20ab1b

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PrintReactiveFunction.ts lines 409–457

export class Writer {
  #out: Array<string> = [];
  #line: string;
  #depth: number;

  constructor({depth}: {depth: number} = {depth: 0}) {
    this.#depth = Math.max(depth, 0);
    this.#line = '';
  }

  complete(): string {
    const line = this.#line.trimEnd();
    if (line.length > 0) {
      this.#out.push(line);
    }
    return this.#out.join('\n');
  }

  append(s: string): void {
    this.write(s);
  }

  newline(): void {
    const line = this.#line.trimEnd();
    if (line.length > 0) {
      this.#out.push(line);
    }
    this.#line = '';
  }

  write(s: string): void {
    if (this.#line.length === 0 && this.#depth > 0) {
      // indent before writing
      this.#line = '  '.repeat(this.#depth);
    }
    this.#line += s;
  }

  writeLine(s: string): void {
    this.write(s);
    this.newline();
  }

  indented(f: () => void): void {
    this.#depth++;
    f();
    this.#depth--;
  }
}

Domain

Defined In

Source

Frequently Asked Questions

What is the Writer class?
Writer is a class in the react codebase, defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PrintReactiveFunction.ts.
Where is Writer defined?
Writer is defined in compiler/packages/babel-plugin-react-compiler/src/ReactiveScopes/PrintReactiveFunction.ts at line 409.

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