[dsch] making isOk and isErr as discriminators #1
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WalkthroughThe changes encompass significant modifications to the documentation, interfaces, and implementation of the Changes
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Actionable comments posted: 0
Outside diff range and nitpick comments (1)
README.md (1)
162-172: Enhance the clarity of the documentation.The changes provide a clear explanation of the
Result<T, E>type and its relationship withOk<T>andErr<E>types, enhancing the clarity of the documentation.Please fix the minor grammatical issue in the following sentence:
-`Result<T, E>` is a generic type that represents either success or failure, and is an union of `Ok<T>` and `Err<E>` types: +`Result<T, E>` is a generic type that represents either success or failure, and is a union of `Ok<T>` and `Err<E>` types:Tools
LanguageTool
[misspelling] ~163-~163: Use “a” instead of ‘an’ if the following word doesn’t start with a vowel sound, e.g. ‘a sentence’, ‘a university’.
Context: ...sents either success or failure, and is an union ofOk<T>andErr<E>types: ...(EN_A_VS_AN)
Review details
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Review profile: CHILL
Files selected for processing (34)
- README.md (3 hunks)
- bundle-types.sh (0 hunks)
- examples/book-and-authors.ts (1 hunks)
- examples/equation-pipe.ts (1 hunks)
- examples/equations.ts (1 hunks)
- examples/imports.ts (0 hunks)
- examples/methods.ts (1 hunks)
- examples/parser.ts (1 hunks)
- package.json (1 hunks)
- src/Err.ts (2 hunks)
- src/Ok.ts (2 hunks)
- src/async-do-gen.test.ts (0 hunks)
- src/async-do-gen.ts (0 hunks)
- src/async-methods.ts (2 hunks)
- src/async.test.ts (1 hunks)
- src/async.ts (1 hunks)
- src/do-gen.test.ts (0 hunks)
- src/do-gen.ts (0 hunks)
- src/do.test.ts (1 hunks)
- src/do.ts (1 hunks)
- src/fn/is-promise.test.ts (1 hunks)
- src/fn/is-promise.ts (1 hunks)
- src/guards.ts (1 hunks)
- src/index.test.ts (0 hunks)
- src/index.ts (1 hunks)
- src/lists.ts (5 hunks)
- src/objects.test.ts (6 hunks)
- src/objects.ts (2 hunks)
- src/result.test.ts (8 hunks)
- src/sync-methods.ts (1 hunks)
- src/sync.ts (1 hunks)
- src/types.test.ts (1 hunks)
- src/types.ts (2 hunks)
- webpack.config.js (0 hunks)
Files not reviewed due to no reviewable changes (8)
- bundle-types.sh
- examples/imports.ts
- src/async-do-gen.test.ts
- src/async-do-gen.ts
- src/do-gen.test.ts
- src/do-gen.ts
- src/index.test.ts
- webpack.config.js
Files skipped from review due to trivial changes (4)
- examples/parser.ts
- src/async.test.ts
- src/objects.test.ts
- src/types.test.ts
Additional context used
LanguageTool
README.md
[misspelling] ~163-~163: Use “a” instead of ‘an’ if the following word doesn’t start with a vowel sound, e.g. ‘a sentence’, ‘a university’.
Context: ...sents either success or failure, and is an union ofOk<T>andErr<E>types: ...(EN_A_VS_AN)
Additional comments not posted (81)
src/async.ts (1)
3-3: Verify the impact of the export change on the codebase.The export statement for
async-do-genhas been removed and a new export statement fordohas been added. This change suggests a shift in the module's public API and may impact how consumers of this module interact with its asynchronous capabilities.Run the following script to verify the usage of
async-do-genanddomodules in the codebase:Verification successful
Export change aligns with codebase usage patterns
The removal of the 'async-do-gen' export and addition of the 'do' export in
src/async.tsis consistent with the usage patterns across the codebase. Key findings:
- No references to 'async-do-gen' were found, indicating its removal won't impact the codebase.
- The 'do' module is widely used and exported from multiple files, including
src/sync.ts,src/index.ts, and nowsrc/async.ts.- The change appears to be part of a refactoring effort to consolidate functionality into the 'do' module.
This modification aligns with the existing structure and doesn't introduce conflicts or breaking changes in the codebase.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `async-do-gen` and `do` modules in the codebase. # Test 1: Search for the usage of `async-do-gen`. Expect: No occurrences. rg --type typescript -A 5 $'async-do-gen' # Test 2: Search for the usage of `do`. Expect: Occurrences of the new module usage. rg --type typescript -A 5 $'do'Length of output: 141
Script:
#!/bin/bash # Description: Verify the usage of `async-do-gen` and `do` modules in the codebase. # Test 1: Search for the usage and imports of `async-do-gen`. Expect: No occurrences. echo "Searching for 'async-do-gen' usage:" fd -e ts -e tsx | xargs rg 'async-do-gen' echo "Searching for 'async-do-gen' imports:" fd -e ts -e tsx | xargs rg "from ['\"].*async-do-gen['\"]" # Test 2: Search for the usage and imports of `do`. Expect: Occurrences of the new module usage. echo "Searching for 'do' usage:" fd -e ts -e tsx | xargs rg '\bdo\b' -A 5 echo "Searching for 'do' imports:" fd -e ts -e tsx | xargs rg "from ['\"].*do['\"]"Length of output: 2567
src/sync.ts (1)
3-3: Verify the impact on dependent modules.The change looks good. However, please ensure that all dependent modules that relied on the
do-genexports have been updated to use thedoexports instead.Run the following script to verify the usage of
do-genexports:Verification successful
Verification successful: No usage of 'do-gen' found in the codebase.
The change from exporting 'do-gen' to exporting 'do' appears to have been implemented correctly. Our thorough search of the TypeScript files in the project revealed no remaining references to 'do-gen', either in import statements or elsewhere in the code.
The presence of 'src/do.ts' in the file list aligns with the new export statement, confirming that the transition from 'do-gen' to 'do' has been carried out consistently.
Based on this evidence, it seems that all necessary updates have been made, and there should be no issues with dependent modules related to this change.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that `do-gen` exports are not used in the codebase. # Test: Search for the usage of `do-gen` exports. Expect: No occurrences. rg --type typescript $'from \'\.\/do-gen\''Length of output: 140
Script:
#!/bin/bash # Description: Verify that `do-gen` exports are not used in the codebase. # Test: Search for the usage of `do-gen` imports (both relative and non-relative). Expect: No occurrences. rg --type typescript "from ['\"]\.?/do-gen['\"]" # Additionally, search for any mentions of 'do-gen' in TypeScript files to catch any potential usages rg --type typescript "do-gen"Length of output: 154
Script:
#!/bin/bash # Description: Verify that `do-gen` exports are not used in the codebase. # Search for 'do-gen' imports in .ts and .tsx files echo "Searching for 'do-gen' imports:" rg -g '*.{ts,tsx}' "from ['\"]\.?/do-gen['\"]" # Search for any mentions of 'do-gen' in .ts and .tsx files echo "Searching for any mentions of 'do-gen':" rg -g '*.{ts,tsx}' "do-gen" # List all .ts and .tsx files for reference echo "List of all TypeScript files:" find . -name "*.ts" -o -name "*.tsx"Length of output: 1491
src/fn/is-promise.ts (1)
1-2: LGTM!The
isPromisefunction is a useful utility for checking if a value is a Promise. It follows the best practices for type checking and type narrowing in TypeScript.
- The use of a type predicate
value is Promise<unknown>allows for type narrowing when the function returnstrue.- The check for
value != nullensures that the function doesn't throw an error when accessing thethenproperty on a null or undefined value.- The check for
typeof value.then === 'function'is a common way to identify a Promise object, as thethenmethod is a characteristic of Promises.The function is concise and can help ensure type safety when working with Promises in TypeScript.
src/index.ts (1)
Line range hint
1-6: Verify the impact of the export changes on the codebase.The changes in the exports look good. The removal of
do-genandasync-do-genexports and the addition of thedoexport seem to align with the PR objectives.However, please ensure that:
- The removal of
do-genandasync-do-genexports does not break any existing functionality in the codebase.- The addition of the
doexport is the intended module to be exposed.Run the following script to verify the impact of the export changes:
Verification successful
Export changes verified: No issues found
The verification process has been completed successfully. Here are the findings:
- No imports of the removed modules 'do-gen' and 'async-do-gen' were found in the codebase, confirming that their removal from the exports in src/index.ts does not break any existing functionality.
- The newly added 'do' export is only imported in a test file (src/do.test.ts), which is expected and appropriate.
These results indicate that the changes in exports are consistent with the usage in the codebase and do not introduce any breaking changes or unintended consequences.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the impact of the export changes on the codebase. # Test 1: Search for any imports of the removed modules. Expect: No results. rg --type typescript $'import.*from.*\'(\.\/)?do-gen\'' rg --type typescript $'import.*from.*\'(\.\/)?async-do-gen\'' # Test 2: Search for any imports of the added module. Expect: Only valid imports. rg --type typescript -A 5 $'import.*from.*\'(\.\/)?do\''Length of output: 533
Script:
#!/bin/bash # Description: Verify the impact of the export changes on the codebase (corrected version). # Test 1: Search for any imports of the removed modules. Expect: No results. echo "Searching for imports of 'do-gen':" rg --type typescript "import.*from.*['\"](\\./)?(do-gen)['\"]" echo "Searching for imports of 'async-do-gen':" rg --type typescript "import.*from.*['\"](\\./)?(async-do-gen)['\"]" # Test 2: Search for any imports of the added module. Expect: Only valid imports. echo "Searching for imports of 'do':" rg --type typescript -A 5 "import.*from.*['\"](\\./)?(do)['\"]"Length of output: 574
Script:
#!/bin/bash # Description: Verify the impact of the export changes on the codebase (using fd and generic search). # Find all TypeScript files typescript_files=$(fd -e ts -e tsx) # Test 1: Search for any imports of the removed modules. Expect: No results. echo "Searching for imports of 'do-gen':" echo "$typescript_files" | xargs rg "import.*from.*['\"](\\./)?(do-gen)['\"]" echo "Searching for imports of 'async-do-gen':" echo "$typescript_files" | xargs rg "import.*from.*['\"](\\./)?(async-do-gen)['\"]" # Test 2: Search for any imports of the added module. Expect: Only valid imports. echo "Searching for imports of 'do':" echo "$typescript_files" | xargs rg -A 5 "import.*from.*['\"](\\./)?(do)['\"]"Length of output: 4847
src/guards.ts (2)
13-13: Verify the impact of changingisErrfrom a method to a property.Similar to the change in
isOk, the modification fromvalue.isErr()tovalue.isErrsuggests thatisErris now a property instead of a method. This could impact the structure of theResultclass and the usage ofisErrthroughout the codebase.Please ensure that this change is consistent with the intended design and doesn't break existing code that might expect
isErrto execute logic.Run the following script to verify the usage of
isErr:Verification successful
Verification confirms consistent usage of
isErras a propertyThe change from
isErr()method toisErrproperty has been consistently implemented across the entire codebase. Key findings:
- No occurrences of
isErr()method calls were found.- Multiple instances of
isErrproperty access are present in various files.- The
isErrproperty is correctly defined in bothOkandErrclasses.- The
isErrfunction inguards.tsnow uses property access (value.isErr).This change appears to be part of a deliberate refactoring effort and has been applied uniformly throughout the project.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `isErr` in the codebase. # Test 1: Search for method calls to `isErr()`. Expect: No occurrences. rg --type typescript $'\.isErr\(\)' # Test 2: Search for property access to `isErr`. Expect: Only valid occurrences. rg --type typescript $'\.isErr\b'Length of output: 140
Script:
#!/bin/bash # Description: Verify the usage of `isErr` in the codebase using more generic search patterns. # Search for TypeScript files echo "TypeScript files in the repository:" fd -e ts -e tsx # Test 1: Search for method calls to `isErr()` echo -e "\nSearching for method calls to isErr():" rg '\.isErr\(\)' -g '*.ts' -g '*.tsx' # Test 2: Search for property access to `isErr` echo -e "\nSearching for property access to isErr:" rg '\.isErr\b' -g '*.ts' -g '*.tsx' # Test 3: Search for any occurrence of `isErr` to catch potential edge cases echo -e "\nSearching for any occurrence of isErr:" rg 'isErr' -g '*.ts' -g '*.tsx'Length of output: 4886
10-10: Verify the impact of changingisOkfrom a method to a property.The change from
value.isOk()tovalue.isOkimplies thatisOkis now a property rather than a method. This could affect how theResultclass is structured and howisOkis used throughout the codebase.Please ensure that this change aligns with the intended design and doesn't break existing code that might expect
isOkto execute logic.Run the following script to verify the usage of
isOk:Verification successful
Change from
isOk()method toisOkproperty is verified and consistentThe modification in
src/guards.tschangingisOkfrom a method call to a property access is verified to be consistent with the rest of the codebase. Key findings:
- No occurrences of
isOk()method calls were found in the codebase.- Multiple instances of
isOkproperty access are present across various files.isOkis declared as a readonly property insrc/types.tsfor bothOkandErrtypes.This change aligns with the intended design and doesn't appear to break existing code. The
isOkproperty is being used correctly in conditional statements, assertions, and other contexts throughout the project.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `isOk` in the codebase. # Test 1: Search for method calls to `isOk()`. Expect: No occurrences. rg --type typescript $'\.isOk\(\)' # Test 2: Search for property access to `isOk`. Expect: Only valid occurrences. rg --type typescript $'\.isOk\b'Length of output: 138
Script:
#!/bin/bash # Description: Verify the usage of `isOk` in the codebase using alternative methods. # Search for TypeScript and JavaScript files echo "Searching for TypeScript and JavaScript files:" find . -type f \( -name "*.ts" -o -name "*.tsx" -o -name "*.js" -o -name "*.jsx" \) echo -e "\nSearching for method calls to isOk():" find . -type f \( -name "*.ts" -o -name "*.tsx" -o -name "*.js" -o -name "*.jsx" \) -print0 | xargs -0 grep -n '\.isOk()' echo -e "\nSearching for property access to isOk:" find . -type f \( -name "*.ts" -o -name "*.tsx" -o -name "*.js" -o -name "*.jsx" \) -print0 | xargs -0 grep -n '\.isOk\b' echo -e "\nSearching for declarations of isOk:" find . -type f \( -name "*.ts" -o -name "*.tsx" -o -name "*.js" -o -name "*.jsx" \) -print0 | xargs -0 grep -n 'isOk:'Length of output: 3271
src/do.ts (4)
1-6: LGTM!The import statements are correct and necessary for the functionality of this module. There are no unused imports.
8-10: LGTM!The type definitions for
JobandAsyncJobare clear, accurate, and well-suited for the intended functionality. The use of generator functions and theoutvariance annotation is appropriate.
12-17: LGTM!The
processIteratorResultfunction correctly handles the different states of the iterator result. The use ofensureResultanderrfunctions ensures type safety and proper error handling. The type annotations provide clear documentation of the expected inputs and outputs.
19-35: LGTM!The
Dofunction overloads and implementation provide a clear and flexible interface for handling both synchronous and asynchronous jobs. The use ofisPromiseallows for dynamic handling of iterator results, while theprocessIteratorResultfunction ensures proper processing of the results. The return type annotations accurately reflect the possible outcomes of the function.src/fn/is-promise.test.ts (4)
5-8: LGTM!The test case correctly checks that
isPromisereturnstruefor a new Promise.
10-13: LGTM!The test case correctly checks that
isPromisereturnstruefor a resolved Promise.
15-19: LGTM!The test case correctly checks that
isPromisereturnstruefor a rejected Promise. Good job catching the rejection to avoid unhandled promise rejection warning.
21-30: LGTM!The test case thoroughly checks that
isPromisereturnsfalsefor various non-promise values. The assertions cover a good range of data types.examples/equations.ts (1)
41-41: Verify the change fromisOk()toisOk.The code has been updated to use the
isOkproperty instead of theisOk()method for checking the success state of theresultobject.Please ensure that this change aligns with the new implementation of the
Result<T, E>type and its associated functionalities. IfisOkwas originally a method that performed additional logic, this change could potentially impact the behavior of the code.src/objects.ts (2)
18-18: Verify the impact of the change on the function's behavior.The change from
result.isErr()toresult.isErris consistent with the PR objective of makingisOkandisErras discriminators. However, it alters the expected behavior of the error check from a function call to a property evaluation.Please ensure that this change does not introduce any unintended consequences in the control flow and error handling of the
reduceObjectfunction. Consider adding test cases to cover the scenarios affected by this modification.
38-38: Verify the impact of the change on the function's behavior.The change from
result.isOk()toresult.isOkis consistent with the PR objective of makingisOkandisErras discriminators. However, it alters the expected behavior of the success check from a function call to a property evaluation.Please ensure that this change does not introduce any unintended consequences in the control flow and result handling of the
reduceObjectErrfunction. Consider adding test cases to cover the scenarios affected by this modification.examples/equation-pipe.ts (1)
54-54: Verify the impact of changingisOk()toisOkacross the codebase.The change from
result.isOk()toresult.isOkaligns with the PR objective of makingisOka discriminator (property) instead of a method. This simplifies the way the success state of theResultis accessed.However, this is likely a breaking change for consumers of the
Resulttype who were using theisOk()method. Please ensure all usages ofisOk()are updated toisOkacross the codebase.Run the following script to verify the usage of
isOk:Verification successful
Verification successful:
isOk()method consistently replaced withisOkpropertyThe verification process has confirmed that the change from
isOk()method toisOkproperty has been consistently applied across the codebase. No occurrences of the oldisOk()method were found, while multiple instances of the newisOkproperty usage were detected.The new
isOkproperty is being used in various files, including:
- src/sync.test.ts
- src/objects.ts
- src/result.test.ts
- src/objects.test.ts
- src/lists.ts
- src/guards.ts
- src/async-methods.ts
- examples/methods.ts
- examples/equations.ts
- examples/equation-pipe.ts
This change aligns with the PR objective of making
isOka discriminator (property) instead of a method. The consistent implementation across different parts of the codebase suggests that the change has been thoroughly applied.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all usages of `isOk` have been updated from a method to a property. # Test 1: Search for the old `isOk()` method usage. Expect: No results. rg --type typescript $'\.isOk\(\)' # Test 2: Search for the new `isOk` property usage. Expect: Only valid usages of the property, no methods. rg --type typescript $'\.isOk\b'Length of output: 138
Script:
#!/bin/bash # Description: Verify all usages of `isOk` have been updated from a method to a property. # Find TypeScript files echo "TypeScript files in the repository:" fd '\.(ts|tsx)$' # Test 1: Search for the old `isOk()` method usage. Expect: No results. echo -e "\nSearching for old isOk() method usage:" fd '\.(ts|tsx)$' | xargs rg '\.isOk\(\)' # Test 2: Search for the new `isOk` property usage. Expect: Only valid usages of the property, no methods. echo -e "\nSearching for new isOk property usage:" fd '\.(ts|tsx)$' | xargs rg '\.isOk\b'Length of output: 2468
examples/book-and-authors.ts (4)
1-1: LGTM!The import statement has been updated correctly to include the necessary functions from
@cardellini/ts-result.
15-20: LGTM!The
getBookWithAuthorsfunction has been updated to use theDonotation correctly, and the function logic remains intact.
22-30: Great job on improving type safety and clarity!The new
getBookWithAuthors2function has an explicit return type that clearly defines the success and error types. This improves the function's contract and makes it easier to understand and use.The function implementation using the
Donotation is consistent with the updatedgetBookWithAuthorsfunction and looks good.
33-34: LGTM!The
fetchBookfunction has been updated to explicitly type theokreturn values asBook, which enhances type safety and clarity. The changes look good.src/Ok.ts (5)
7-7: LGTM!The change in the implemented interface from
ResulttoOkenhances the clarity and type safety of the code by making the class's purpose more explicit.
10-12: LGTM!The transformation of
isOkfrom a method to a getter property enhances the readability and usability of the class by allowing the check to be accessed as a property rather than a function call. This change promotes a more idiomatic use of TypeScript's capabilities.
14-16: LGTM!The transformation of
isErrfrom a method to a getter property enhances the readability and usability of the class by allowing the check to be accessed as a property rather than a function call. This change promotes a more idiomatic use of TypeScript's capabilities.
102-102: LGTM!The change in the return type of the
okfunction fromResult<T, never>toOk<T>aligns it with the new implementation ofOkImpl. This enhances the clarity and type safety of the code by making the function's purpose more explicit.
1-5: LGTM!The addition of the
AsyncOkandOktypes in the import statements aligns the imports with the usage of these types in the updated code.src/Err.ts (3)
1-5: LGTM!The import statement correctly adds the new types
AsyncErrandErrto the existingResultimport.
107-107: Verify the impact of the return type change on the codebase.The change in the return type of the
errfunction fromResult<never, E>toErr<E>looks good and aligns with the newErrinterface implemented by theErrImplclass.Run the following script to verify the usage of the
errfunction across the codebase:Verification successful
The change in the return type of
errfunction is safe and consistent with its usage across the codebase.The extensive analysis of the
errfunction usage throughout the codebase reveals that the change fromResult<never, E>toErr<E>as the return type is compatible with all existing implementations. Theerrfunction is used in various contexts, including synchronous and asynchronous operations, and the new return type aligns well with the overall error handling strategy in the project.No instances were found where the
errfunction is used in a way that would specifically require it to returnResult<never, E>. TheErr<E>type appears to be a more specific subtype ofResult<never, E>, which explains the seamless integration with existing code.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of the `err` function across the codebase. # Test: Search for occurrences of `err(`. Expect: Only usage consistent with the `Err<E>` return type. rg --type typescript $'err\('Length of output: 65
Script:
#!/bin/bash # Description: Verify the usage of the `err` function across the codebase. # Find all TypeScript files and search for 'err(' pattern fd -e ts -e tsx -x rg -n -C 2 'err\('Length of output: 30365
7-16: Verify the impact of the interface change on the codebase.The change in the implemented interface from
ResulttoErrlooks good and aligns with the class's intended use as an error state. TheisOkandisErrgetters also correctly define the state of the instance.Suggestion: Consider removing the
// eslint-disable-line class-methods-use-thiscomments and updating the linter configuration ifthisis not needed in getters.Run the following script to verify the usage of
ErrImplacross the codebase:Verification successful
The interface change from Result to Err is consistent across the codebase.
After thorough verification, I can confirm that the change in the implemented interface from
ResulttoErrfor theErrImplclass does not negatively impact the codebase. The usage ofErrImplis consistent with its new interface in all occurrences found:
- In
src/guards.ts, it's correctly imported and used for type checking.- In
src/Err.ts, the implementation matches the reviewed code, and it's used appropriately in other methods and exports.The current implementation appears to be correct and consistent. No further changes are necessary regarding the interface change.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of `ErrImpl` across the codebase. # Test: Search for occurrences of `ErrImpl`. Expect: Only usage consistent with the `Err` interface. rg --type typescript $'ErrImpl'Length of output: 65
Script:
#!/bin/bash # Description: Verify the usage of `ErrImpl` across the codebase. # Search for ErrImpl occurrences without specifying file type echo "Searching for ErrImpl occurrences:" rg 'ErrImpl' # Find TypeScript files and search for ErrImpl within them echo -e "\nSearching for ErrImpl in TypeScript files:" fd -e ts -e tsx | xargs rg 'ErrImpl' # Search for import statements related to ErrImpl echo -e "\nSearching for ErrImpl imports:" rg 'import.*ErrImpl'Length of output: 1018
src/sync-methods.ts (2)
59-59: LGTM!The changes to the
biMapfunction signature are consistent with the TypeScript best practices for defining generic type parameters. The reordering and introduction of default types may enhance type inference and usability.
63-63: LGTM!The changes to the
biChainfunction signature are consistent with the TypeScript best practices for defining generic type parameters. The reordering and introduction of default types may enhance type inference and usability, similar to the changes made tobiMap.src/types.ts (6)
1-5: LGTM!The change from type alias to interface for
Ok<T>provides a more structured definition and enhances type safety. ExtendingResultInterface<T, never>ensures thatOkhas all the necessary methods. Thevalueproperty holds the successful result value, and theisOkandisErrdiscriminator properties make it easier to distinguish betweenOkandErrinstances.
7-11: LGTM!The change from type alias to interface for
Err<E>provides a more structured definition and enhances type safety. ExtendingResultInterface<never, E>ensures thatErrhas all the necessary methods. Theerrorproperty holds the error value, and theisOkandisErrdiscriminator properties make it easier to distinguish betweenOkandErrinstances.
Line range hint
13-38: LGTM!The change from type alias to interface for
ResultInterface<T, E>allows for a more structured approach to defining the behavior of results. The interface consolidates the methods related to result handling, such asmap,chain,unwrap, etc., providing a consistent way to handle results. The methods have appropriate type signatures to ensure type safety. This change enhances the expressiveness and usability of the result types and promotes a more structured and consistent approach to handling results.
41-41: LGTM!The redefinition of
Result<T, E>as a union ofOk<T>andErr<E>reinforces the concept that a result can either be successful (Ok) or erroneous (Err). It leverages the newly definedOkandErrinterfaces, enhancing the clarity and expressiveness of theResulttype. This change ensures that aResultcan only be either anOkor anErr, improving type safety.
44-44: LGTM!The update to
ErrTypeOf<T>ensures that it correctly infers the error type from the newErrinterface structure. This change maintains the correctness of theErrTypeOftype extraction utility.
45-45: LGTM!The update to
OkTypeOf<T>ensures that it correctly infers the value type from the newOkinterface structure. This change maintains the correctness of theOkTypeOftype extraction utility.src/async-methods.ts (3)
20-20: LGTM!The change simplifies the code by removing the dependency on the
Guardsmodule for checking if the result is ok. It maintains the original functionality while improving clarity.
27-27: LGTM!The change simplifies the code by removing the dependency on the
Guardsmodule for checking if the result is an error. It maintains the original functionality while improving clarity.
91-93: LGTM!The change simplifies the code by removing the dependency on the
Guardsmodule for checking if the result is ok or an error. It maintains the original functionality while improving clarity.package.json (2)
47-47: LGTM!Updating the TypeScript dependency to
^5.6.2is a non-breaking change that may introduce new features, improvements, or bug fixes. Ensure that the project still compiles and passes all tests with this updated version.
Line range hint
1-1: Verify the impact of the removed exports.The removal of the
"./sync/do"and"./async/do"entries from the exports section suggests a refactoring or removal of these specific functionalities. This could impact how developers interact with the library's API.Please ensure that:
- The removal is intentional and aligns with the library's goals.
- The documentation has been updated to reflect these changes.
- Dependent projects have been updated to handle the removed exports.
Run the following script to verify the usage of the removed exports in the codebase:
Verification successful
Removal of exports appears to be safe.
The verification process shows that the removed exports ("./sync/do" and "./async/do") are not referenced anywhere in the codebase. This suggests that their removal from package.json is likely a cleanup of unused or deprecated paths and should not negatively impact the project.
However, please note:
- Files like
src/do.ts,src/async.ts, andsrc/sync.tsstill exist, indicating that similar functionality might be exported through different paths.- Ensure that the documentation is updated to reflect any changes in how these functionalities should be imported and used.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of the removed exports in the codebase. # Test: Search for the usage of the removed exports. Expect: No occurrences. rg --type typescript -e $'sync/do|async/do'Length of output: 79
Script:
#!/bin/bash # Description: Verify the usage of the removed exports in the codebase. # Search for the removed export paths in all files echo "Searching for removed export paths:" rg -e '"./sync/do"|"./async/do"' --type-add 'code:*.{js,ts,jsx,tsx}' -t code # Search for potential usage of 'sync/do' and 'async/do' in all files echo "Searching for potential usage of removed exports:" rg -e 'sync/do|async/do' --type-add 'code:*.{js,ts,jsx,tsx}' -t code # List all JavaScript and TypeScript files in the repository echo "Listing all JavaScript and TypeScript files:" fd -e js -e ts -e jsx -e tsxLength of output: 1525
examples/methods.ts (2)
23-24: Verify ifisErris defined as a property getter and assess the impact of this change.The change from method call syntax (
isErr()) to property access (isErr) alters the semantics and potentially the behavior. Please ensure thatisErris defined as a property getter to avoid unexpected results.Assess the impact of this change on the public API and existing code that relies on the method call syntax. Consider generating a script to search the codebase for potential breaking changes:
Verification successful
These new scripts should help us gather the necessary information without relying on TypeScript-specific file type recognition. We'll search for the definition of
isErr, look for any remaining method calls, and check for property accesses. This will give us a clearer picture of howisErris defined and used throughout the codebase.
This new script will search for property accesses of
isOkandisErrwithout using the problematic negative lookahead. It will also search for usage ofGuards.isOkandGuards.isErrin tests, which we observed in the previous results. This should give us a comprehensive view of how these properties are used throughout the codebase.
Changes to
isOkandisErrare correct and consistent throughout the codebaseThe transition from method calls to property access for
isOkandisErrhas been successfully implemented across the entire codebase. Key findings:
isErris properly defined as a getter in bothErrandOkclasses (src/Err.ts and src/Ok.ts).- No occurrences of
isOk()orisErr()method calls were found.- Property accesses (e.g.,
result.isOk,result.isErr) are consistently used in all relevant files.- The changes in
examples/methods.tsalign with the implementation and usage in other parts of the codebase.These changes maintain the correct behavior while simplifying the API. No breaking changes or inconsistencies were identified.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Search for potential breaking changes related to `isOk` and `isErr` method calls. # Test 1: Search for `isOk` method calls. Expect: No occurrences of `isOk()`. rg --type typescript $'\.isOk\(\)' # Test 2: Search for `isErr` method calls. Expect: No occurrences of `isErr()`. rg --type typescript $'\.isErr\(\)'Length of output: 142
Script:
#!/bin/bash # Description: Verify isErr definition and search for method calls and property accesses # Search for the definition of isErr echo "Searching for isErr definition:" rg "(?:get )?isErr\s*[\(:]" --type-add 'code:*.{js,ts,jsx,tsx}' -t code # Search for any remaining isOk() and isErr() method calls echo -e "\nSearching for isOk() and isErr() method calls:" rg "\.(isOk|isErr)\(\)" --type-add 'code:*.{js,ts,jsx,tsx}' -t code # Search for isOk and isErr property accesses echo -e "\nSearching for isOk and isErr property accesses:" rg "\.(isOk|isErr)(?!\()" --type-add 'code:*.{js,ts,jsx,tsx}' -t codeLength of output: 1225
Script:
#!/bin/bash # Description: Search for isOk and isErr property accesses echo "Searching for isOk and isErr property accesses:" rg "\.(isOk|isErr)\b" --type-add 'code:*.{js,ts,jsx,tsx}' -t code echo -e "\nSearching for isOk and isErr usage in tests:" rg "Guards\.(isOk|isErr)" --type-add 'code:*.{js,ts,jsx,tsx}' -t codeLength of output: 3257
15-16: Verify ifisOkis defined as a property getter and assess the impact of this change.The change from method call syntax (
isOk()) to property access (isOk) alters the semantics and potentially the behavior. Please ensure thatisOkis defined as a property getter to avoid unexpected results.Assess the impact of this change on the public API and existing code that relies on the method call syntax. Consider generating a script to search the codebase for potential breaking changes:
Verification successful
Verification complete: Change to property access is consistent and appears correct
The codebase analysis confirms that the change from method calls (
isOk(),isErr()) to property access (isOk,isErr) has been consistently applied across the project. No instances of the old method call syntax were found, and the new property access syntax is used correctly in various contexts, including conditionals and type guards.While we couldn't directly locate the definitions of
isOkandisErr, their usage strongly suggests they are indeed properties:
- Used in conditional statements:
if (result.isOk),if (result.isErr)- Used in type guards:
<T>(value: Result<T, unknown>): value is Ok<T> => value.isOk;The change appears to be intentional and consistently implemented, reducing the likelihood of breaking changes. However, to ensure complete correctness:
- Double-check the definitions of
isOkandisErrin yourResulttype or class to confirm they are properly defined as properties or getters.- Review the
Resulttype implementation to ensure it aligns with this new property access pattern.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Search for potential breaking changes related to `isOk` and `isErr` method calls. # Test 1: Search for `isOk` method calls. Expect: No occurrences of `isOk()`. rg --type typescript $'\.isOk\(\)' # Test 2: Search for `isErr` method calls. Expect: No occurrences of `isErr()`. rg --type typescript $'\.isErr\(\)'Length of output: 142
Script:
#!/bin/bash # Description: Search for potential breaking changes related to `isOk` and `isErr`, and their definitions # Search for old method call syntax echo "Searching for old method call syntax:" rg '\.isOk\(\)' --type-add 'ts:*.{ts,tsx}' -t ts rg '\.isErr\(\)' --type-add 'ts:*.{ts,tsx}' -t ts # Search for new property access syntax echo "Searching for new property access syntax:" rg '\.isOk(?!\()' --type-add 'ts:*.{ts,tsx}' -t ts rg '\.isErr(?!\()' --type-add 'ts:*.{ts,tsx}' -t ts # Search for isOk definition as a property or method echo "Searching for isOk definition:" ast-grep --lang typescript --pattern 'class $_ { $$$ isOk$_: $_$_ { $$$ } $$$ }' ast-grep --lang typescript --pattern 'class $_ { $$$ isOk$_($_) { $$$ } $$$ }' # Search for isErr definition as a property or method echo "Searching for isErr definition:" ast-grep --lang typescript --pattern 'class $_ { $$$ isErr$_: $_$_ { $$$ } $$$ }' ast-grep --lang typescript --pattern 'class $_ { $$$ isErr$_($_) { $$$ } $$$ }'Length of output: 2308
Script:
#!/bin/bash # Description: Refined search for isOk and isErr usage and definitions # Search for any remaining old method call syntax echo "Searching for any remaining old method call syntax:" rg '\.(isOk|isErr)\(\)' --type-add 'ts:*.{ts,tsx}' -t ts # Search for new property access syntax echo "Searching for new property access syntax:" rg '\.(isOk|isErr)(?!\()' --type-add 'ts:*.{ts,tsx}' -t ts --pcre2 # Search for isOk and isErr definitions echo "Searching for isOk and isErr definitions:" ast-grep --lang typescript --pattern 'isOk: $_' ast-grep --lang typescript --pattern 'isOk($_) { $$ }' ast-grep --lang typescript --pattern 'isErr: $_' ast-grep --lang typescript --pattern 'isErr($_) { $$ }' # Search for class or interface containing isOk and isErr echo "Searching for class or interface containing isOk and isErr:" ast-grep --lang typescript --pattern 'class $_ { $$ isOk $$ isErr $$ }' ast-grep --lang typescript --pattern 'interface $_ { $$ isOk $$ isErr $$ }'Length of output: 3732
src/lists.ts (5)
29-29: LGTM!The change from
result.isErr()toresult.isErris consistent with the PR objective of makingisOkandisErrdiscriminators. The modification does not introduce any apparent issues.
58-58: LGTM!The change from
result.isOk()toresult.isOkis consistent with the PR objective of makingisOkandisErrdiscriminators. The modification does not introduce any apparent issues.
156-156: LGTM!The change from
result.isOk()toresult.isOkis consistent with the PR objective of makingisOkandisErrdiscriminators. The modification does not introduce any apparent issues.
183-183: LGTM!The change from
res.isErr()tores.isErris consistent with the PR objective of makingisOkandisErrdiscriminators. The modification does not introduce any apparent issues.
207-207: LGTM!The change from
res.isErr()tores.isErris consistent with the PR objective of makingisOkandisErrdiscriminators. The modification does not introduce any apparent issues.src/do.test.ts (7)
30-41: LGTM!The
qerfunction correctly implements the quadratic formula and handles the different cases based on the coefficients. The use of theDoconstruct makes the code readable and easy to follow.
116-129: LGTM!The
okIfPersonfunction correctly validates an unknown value as aPersonobject using a series of validation functions. The use of theDoconstruct makes the validation logic readable and easy to follow. The error paths are correctly mapped toPersonValidationErrorobjects.
199-206: LGTM!The
getBookfunction correctly retrieves a book by its ID using theDoconstruct with an async generator function. The use ofokIfExiststo handle the case when the book is not found makes the code more readable.
217-226: LGTM!The
findAuthorAmonghigher-order function correctly creates an index map of authors by their ID for efficient lookup. The returned function usesokIfExiststo handle the case when the author is not found, making the code more readable.
228-239: LGTM!The
getBookWithAuthorsfunction correctly retrieves a book with its authors by the book ID using theDoconstruct with an async generator function. The use of thecollectfunction withfindAuthorAmongto retrieve the book's authors makes the code readable and easy to follow.
310-315: LGTM!The
getChigher-order function correctly uses theDoconstruct with an async generator function to handle different cases based on the inputx. The use ofyield*to await the result fromgetBmakes the code readable and easy to follow.
43-322: LGTM!The test cases cover various scenarios for the
qer,okIfPerson,getBookWithAuthors, andgetCfunctions. The use ofitandit.eachfunctions makes the test cases readable and easy to follow. Theexpectfunction is used correctly to assert the expected results. The test case forgetCcorrectly checks the return type of the function using theExpectandEqualtypes.README.md (4)
1-4: LGTM!The reformatting of the badge section improves readability and visual clarity.
115-118: LGTM!The code segment demonstrates the correct usage of the
Resulttype and its associated functionalities in an async context.
174-244: LGTM!The changes significantly enhance the documentation by providing detailed information about the
Ok<T>,Err<E>, andResultInterface<T, E>interfaces and their usage.
246-266: LGTM!The changes provide clear documentation for the
okanderrconstructor functions, including their function signatures.src/result.test.ts (20)
27-27: Type assertion is correct.The type assertion is necessary to set up the test case with a union type.
Line range hint
29-34: Type narrowing is working as expected.Inside the if statement guarded by
isResult, the type ofresultis correctly narrowed toResult<string, 'foo'>. The type check usingExpectandEqualconfirms this.
63-63: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
Line range hint
69-76: Type narrowing is working as expected.Inside the if statement guarded by
isOk, the type ofresultis correctly narrowed toOk<'foo'>. The type checks usingExpectandEqualconfirm the narrowed type ofresultand the type ofresult.value.
81-81: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
90-96: Type narrowing is working as expected in the else branch.In the else branch, the type of
resultis correctly narrowed toErr<string>because it failed theisOkcheck. The type checks usingExpectandEqualconfirm the narrowed type ofresultand the type ofresult.error.
101-101: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
107-111: Type narrowing is working as expected with theisOkproperty.Inside the if statement guarded by the
isOkproperty check, the type ofresultis correctly narrowed toOk<'foo'>. The type check usingExpectandEqualconfirms this.
116-116: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
125-128: Type narrowing is working as expected in the else branch with theisOkproperty.In the else branch, the type of
resultis correctly narrowed toErr<'bar'>because it failed theisOkproperty check. The type check usingExpectandEqualconfirms this.
143-143: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
Line range hint
150-153: Type narrowing is working as expected.Inside the if statement guarded by
isErr, the type ofresultis correctly narrowed toErr<'foo'>. The type check usingExpectandEqualconfirms this.
159-159: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
169-172: Type narrowing is working as expected in the else branch.In the else branch, the type of
resultis correctly narrowed toOk<string>because it failed theisErrcheck. The type check usingExpectandEqualconfirms this.
177-177: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
184-188: Type narrowing is working as expected with theisErrproperty.Inside the if statement guarded by the
isErrproperty check, the type ofresultis correctly narrowed toErr<'foo'>. The type check usingExpectandEqualconfirms this.
193-193: Type assertion is correct.The type assertion is necessary to set up the test case with a
Resulttype.
203-206: Type narrowing is working as expected in the else branch with theisErrproperty.In the else branch, the type of
resultis correctly narrowed toOk<string>because it failed theisErrproperty check. The type check usingExpectandEqualconfirms this.
917-934: The test case correctly verifies the composition law forbiMapmethod calls on anOkresult.The test case compares the result of chained
biMapmethod calls with the result of a singlebiMapcall using composed functions. This is in accordance with the composition law forbiMap, which states thatbiMap(f, h).biMap(g, i)should be equal tobiMap(g ∘ f, i ∘ h), where∘denotes function composition.
959-975: The test case correctly verifies the composition law forbiMapmethod calls on anErrresult.The test case compares the result of chained
biMapmethod calls with the result of a singlebiMapcall using composed functions. This is in accordance with the composition law forbiMap, which states thatbiMap(f, h).biMap(g, i)should be equal to `biMap(g ∘ f, i
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Actionable comments posted: 0
Outside diff range and nitpick comments (3)
README.md (3)
163-163: Typographical Error: Use 'a union' instead of 'an union'In line 163, the phrase "is an union of
Ok<T>andErr<E>types:" should use 'a' instead of 'an' because 'union' starts with a consonant sound.Apply this diff to correct the error:
-is an union of `Ok<T>` and `Err<E>` types: +is a union of `Ok<T>` and `Err<E>` types:Tools
LanguageTool
[misspelling] ~163-~163: Use “a” instead of ‘an’ if the following word doesn’t start with a vowel sound, e.g. ‘a sentence’, ‘a university’.
Context: ...sents either success or failure, and is an union ofOk<T>andErr<E>types: ...(EN_A_VS_AN)
411-412: Incomplete Sentence: Add a Subject for ClarityThe description of the
.valueproperty lacks a subject in the second sentence. For better readability, consider adding a subject to form a complete sentence.Apply this diff to revise the sentence:
-Returns the value of `Ok<T>`. Could be accessed if and only if the `Result<T, E>` is explicitly narrowed to `Ok<T>`. +Returns the value of `Ok<T>`. It can be accessed if and only if the `Result<T, E>` is explicitly narrowed to `Ok<T>`.Tools
LanguageTool
[style] ~411-~411: To form a complete sentence, be sure to include a subject.
Context: ...value: T Returns the value ofOk<T>. Could be accessed if and only if the `Result<...(MISSING_IT_THERE)
454-455: Incomplete Sentence: Add a Subject for ClarityIn the description of the
.errorproperty, the second sentence is missing a subject. Adding a subject improves the grammatical structure and readability.Apply this diff to revise the sentence:
-Returns the error of `Err<E>`. Could be accessed if and only if the `Result<T, E>` is explicitly narrowed to `Err<E>`. +Returns the error of `Err<E>`. It can be accessed if and only if the `Result<T, E>` is explicitly narrowed to `Err<E>`.Tools
LanguageTool
[style] ~454-~454: To form a complete sentence, be sure to include a subject.
Context: ...rror: E Returns the error ofErr<E>. Could be accessed if and only if the `Result<...(MISSING_IT_THERE)
Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (9)
- .eslintrc.json (1 hunks)
- README.md (17 hunks)
- examples/simple-recover.ts (1 hunks)
- src/Err.ts (1 hunks)
- src/Ok.ts (1 hunks)
- src/lists.ts (5 hunks)
- src/result.test.ts (8 hunks)
- src/sync-methods.ts (3 hunks)
- src/types.ts (2 hunks)
Files skipped from review as they are similar to previous changes (5)
- src/Err.ts
- src/Ok.ts
- src/lists.ts
- src/result.test.ts
- src/sync-methods.ts
Additional context used
LanguageTool
README.md
[misspelling] ~163-~163: Use “a” instead of ‘an’ if the following word doesn’t start with a vowel sound, e.g. ‘a sentence’, ‘a university’.
Context: ...sents either success or failure, and is an union ofOk<T>andErr<E>types: ...(EN_A_VS_AN)
[style] ~411-~411: To form a complete sentence, be sure to include a subject.
Context: ...value: T Returns the value ofOk<T>. Could be accessed if and only if the `Result<...(MISSING_IT_THERE)
[style] ~454-~454: To form a complete sentence, be sure to include a subject.
Context: ...rror: E Returns the error ofErr<E>. Could be accessed if and only if the `Result<...(MISSING_IT_THERE)
Additional comments not posted (11)
examples/simple-recover.ts (2)
3-6: LGTM!The function logic is correct, and the implementation is accurate. It correctly checks if a number is odd and returns the appropriate
Resulttype.
8-11: LGTM!The function logic is correct, and the implementation is accurate. It correctly uses the
okIfOddfunction to check if the input is odd and chains an error handling operation to return the next odd number if the input is even. Theunwrapmethod is used appropriately to extract the value from theResulttype..eslintrc.json (1)
64-66: LGTM!The addition of
"esm/**/*"and"dist/**/*"to theignorePatternsarray is a sensible change. It prevents ESLint from flagging potential issues in the generated ES module outputs and distribution files, which is a common practice.src/types.ts (5)
1-5: Excellent refactoring to enhance clarity and type safety!The transition from type alias to interface for
Ok<T>, along with the addition ofisOkandisErrproperties, provides a more structured and expressive approach to defining the behavior of successful results. The use ofnevertype for the error generic parameter reinforces the concept that anOkresult cannot have an error value.These changes promote better type inference, usability, and safety in handling success cases throughout the codebase.
7-11: Great refactoring to improve clarity and type safety for error results!Similar to the changes made to
Ok<T>, the transition from type alias to interface forErr<E>, along with the addition ofisOkandisErrproperties, provides a more structured and expressive approach to defining the behavior of error results. The use ofnevertype for the success generic parameter reinforces the concept that anErrresult cannot have a success value.These modifications enhance type inference, usability, and safety in handling error cases throughout the codebase.
Line range hint
13-38: Excellent refactoring to improve structure and functionality of the result type!Replacing the
Result<T, E>type alias with theResultInterface<T, E>interface is a great decision. It allows for a more structured approach to defining the behavior of results by consolidating the related methods, such asmap,chain, andunwrap, in a single interface. This change enhances code organization and readability.The addition of
biMapandbiChainmethods is a valuable enhancement, as they provide more flexibility in handling both success and error cases simultaneously. These methods enable developers to apply transformations to both the success and error values in a single operation, leading to more concise and expressive code.Overall, these modifications significantly improve the structure, expressiveness, and functionality of the result type.
41-41: Great update to reinforce the concept of a result being either success or error!Redefining the
Result<T, E>type alias as a union ofOk<T>andErr<E>is a fantastic change. It clearly conveys the idea that a result can only be in one of two states: success or error. By leveraging the newly definedOk<T>andErr<E>interfaces, this change ensures that a result always adheres to the expected structure and behavior.This modification enhances the clarity, expressiveness, and type safety of the result type throughout the codebase.
44-45: Excellent update to maintain compatibility and type safety of the extraction utilities!Updating the
ErrTypeOfandOkTypeOftype extraction utilities to reflect the new interface structure is a crucial change. It ensures that these utilities continue to correctly infer the success and error types from the updatedOkandErrinterfaces. By maintaining compatibility with the new result type structure, these changes promote type safety and accurate type inference when extracting specific types from a result value.This modification demonstrates attention to detail and a commitment to maintaining a consistent and reliable type system throughout the codebase.
README.md (3)
179-185: Well-DefinedOk<T>InterfaceThe definition of the
Ok<T>interface is clear and correctly extendsResultInterface<T, never>with appropriate properties. This enhances type safety and clarity when working with successful results.
198-207: Well-DefinedErr<E>InterfaceThe definition of the
Err<E>interface is well-structured and correctly extendsResultInterface<never, E>with the appropriate properties. This provides consistency and clarity when handling error cases.
220-247: Introduction ofResultInterface<T, E>Enhances ConsistencyThe addition of the
ResultInterface<T, E>interface standardizes the common methods available forResultinstances. This promotes code reuse and maintainability across the codebase.
Summary by CodeRabbit
Release Notes
New Features
Result<T, E>,Ok<T>, andErr<E>types, improving clarity and usability.ResultInterface<T, E>for common methods related to result handling.getBookWithAuthors2function for improved book and author fetching with better error handling.isPromiseutility function to check if a value is a Promise.Bug Fixes
isOkandisErr.Chores
^5.6.2.asyncDoanddo-gen.Tests
isPromisefunction to validate its behavior across various scenarios.