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📄 prefer-reduce-type-parameter.ts

📊 Analysis Summary

Metric	Count
🔧 Functions	9
📦 Imports	6
📊 Variables & Constants	2
📑 Type Aliases	1

📚 Table of Contents

• Imports
• Variables & Constants
• Functions
• Type Aliases

🛠️ File Location:

📂 packages/eslint-plugin/src/rules/prefer-reduce-type-parameter.ts

📦 Imports

Name	Source
TSESTree	@typescript-eslint/utils
createRule	../util
getConstrainedTypeAtLocation	../util
getParserServices	../util
isStaticMemberAccessOfValue	../util
isTypeAssertion	../util

---

Variables & Constants

Name	Type	Kind	Value	Exported
isAssertionNecessary	boolean	const	`!checker.isTypeAssignableTo(
initializerType,
assertedType,
)`	✗
fixes	any[]	const	`[
fixer.removeRange([
secondArg.range[0],
secondArg.expression.range[0],
]),
fixer.removeRange([
secondArg.expression.range[1],
secondArg.range[1],
]),
]`	✗

---

Functions

isArrayType(type: ts.Type): boolean

Code

function isArrayType(type: ts.Type): boolean {
      return tsutils
        .unionConstituents(type)
        .every(unionPart =>
          tsutils
            .intersectionConstituents(unionPart)
            .every(t => checker.isArrayType(t) || checker.isTupleType(t)),
        );
    }

• Parameters:
• type: ts.Type
• Return Type: boolean
• Calls:
• tsutils .unionConstituents(type) .every
• tsutils .intersectionConstituents(unionPart) .every
• checker.isArrayType
• checker.isTupleType

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

fix(fixer: any): any[]

Code

fixer => {
              const fixes = [
                fixer.removeRange([
                  secondArg.range[0],
                  secondArg.expression.range[0],
                ]),
                fixer.removeRange([
                  secondArg.expression.range[1],
                  secondArg.range[1],
                ]),
              ];

              if (!callee.parent.typeArguments) {
                fixes.push(
                  fixer.insertTextAfter(
                    callee,
                    `<${context.sourceCode.getText(secondArg.typeAnnotation)}>`,
                  ),
                );
              }

              return fixes;
            }

• Parameters:
• fixer: any
• Return Type: any[]
• Calls:
• fixer.removeRange
• fixes.push
• fixer.insertTextAfter
• context.sourceCode.getText

---

Type Aliases

MemberExpressionWithCallExpressionParent

type MemberExpressionWithCallExpressionParent = {
  parent: TSESTree.CallExpression;
} & TSESTree.MemberExpression;

---