Method astSwitchStatement

src/backend/web-gl/function-node.js:928–1022

(ast, retArr)

  }

  astSwitchStatement(ast, retArr) {
    if (ast.type !== 'SwitchStatement') {
      throw this.astErrorOutput('Invalid switch statement', ast);
    }
    const { discriminant, cases } = ast;
    const type = this.getType(discriminant);
    const varName = `switchDiscriminant${this.astKey(ast, '_')}`;
    switch (type) {
      case 'Float':
      case 'Number':
        retArr.push(`float ${varName} = `);
        this.astGeneric(discriminant, retArr);
        retArr.push(';\n');
        break;
      case 'Integer':
        retArr.push(`int ${varName} = `);
        this.astGeneric(discriminant, retArr);
        retArr.push(';\n');
        break;
    }
    // switch with just a default:
    if (cases.length === 1 && !cases[0].test) {
      this.astGeneric(cases[0].consequent, retArr);
      return retArr;
    }

    // regular switches:
    let fallingThrough = false;
    let defaultResult = [];
    let movingDefaultToEnd = false;
    let pastFirstIf = false;
    for (let i = 0; i < cases.length; i++) {
      // default
      if (!cases[i].test) {
        if (cases.length > i + 1) {
          movingDefaultToEnd = true;
          this.astGeneric(cases[i].consequent, defaultResult);
          continue;
        } else {
          retArr.push(' else {\n');
        }
      } else {
        // all others
        if (i === 0 || !pastFirstIf) {
          pastFirstIf = true;
          retArr.push(`if (${varName} == `);
        } else {
          if (fallingThrough) {
            retArr.push(`${varName} == `);
            fallingThrough = false;
          } else {
            retArr.push(` else if (${varName} == `);
          }
        }
        if (type === 'Integer') {
          const testType = this.getType(cases[i].test);
          switch (testType) {
            case 'Number':