apple / swift-syntax
Duplication

Places in code with 6 or more lines that are exactly the same.

Intro
  • For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
  • Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
  • You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
Learn more...
Duplication Overall
  • 23% duplication:
    • 60,277 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
    • 14,249 duplicated lines
  • 35,553 duplicates
system23% (14,249 lines)
Duplication per Extension
swift23% (14,249 lines)
Duplication per Component (primary)
Sources/SwiftSyntax/gyb_generated25% (11,441 lines)
Sources/SwiftSyntaxBuilder/gyb_generated22% (2,518 lines)
Sources/SwiftSyntax5% (142 lines)
lit_tests28% (114 lines)
Sources/SwiftSyntaxParser9% (28 lines)
Sources/SwiftSyntaxBuilder5% (6 lines)
ROOT0% (0 lines)
Sources/SwiftSyntaxBuilder/gyb_helpers0% (0 lines)
Sources/SwiftSyntaxParser/gyb_generated0% (0 lines)
Sources/_CSwiftSyntax/include0% (0 lines)
Sources/_CSwiftSyntax/src0% (0 lines)
lit_tests/incrParse0% (0 lines)

Duplication Between Components (50+ lines)

G Sources/SwiftSyntax Sources/SwiftSyntax Sources/SwiftSyntaxParser Sources/SwiftSyntaxParser Sources/SwiftSyntax--Sources/SwiftSyntaxParser 56

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Longest Duplicates
The list of 20 longest duplicates.
See data for all 35,553 duplicates...
Size#FoldersFilesLinesCode
54 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 1874:1942 (1%)
5093:5161 (1%)
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54 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 1539:1607 (1%)
1874:1942 (1%)
 view
54 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 1539:1607 (1%)
5093:5161 (1%)
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40 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 583:633 (1%)
2186:2236 (1%)
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38 x 2 lit_tests
lit_tests
coloring_configs.swift
coloring_configs.swift
 11:92 (23%)
100:181 (23%)
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38 x 2 lit_tests
lit_tests
coloring_configs.swift
coloring_configs.swift
 11:92 (23%)
190:271 (23%)
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38 x 2 lit_tests
lit_tests
coloring_configs.swift
coloring_configs.swift
 100:181 (23%)
190:271 (23%)
 view
37 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 284:330 (1%)
1543:1589 (1%)
 view
37 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 284:330 (1%)
1878:1924 (1%)
 view
37 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 284:330 (1%)
5097:5143 (1%)
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35 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 1874:1917 (1%)
2815:2858 (1%)
 view
35 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 1539:1582 (1%)
2815:2858 (1%)
 view
35 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 2815:2858 (1%)
5093:5136 (1%)
 view
34 x 2 Sources/SwiftSyntax/gyb_generated
Sources/SwiftSyntax/gyb_generated
SyntaxCollections.swift
SyntaxCollections.swift
 6431:6488 (<1%)
6679:6736 (<1%)
 view
34 x 2 Sources/SwiftSyntax/gyb_generated
Sources/SwiftSyntax/gyb_generated
SyntaxCollections.swift
SyntaxCollections.swift
 5435:5492 (<1%)
6431:6488 (<1%)
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34 x 2 Sources/SwiftSyntax/gyb_generated
Sources/SwiftSyntax/gyb_generated
SyntaxCollections.swift
SyntaxCollections.swift
 5435:5492 (<1%)
6679:6736 (<1%)
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34 x 2 Sources/SwiftSyntax/gyb_generated
Sources/SwiftSyntax/gyb_generated
SyntaxCollections.swift
SyntaxCollections.swift
 5435:5492 (<1%)
7426:7483 (<1%)
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34 x 2 Sources/SwiftSyntax/gyb_generated/syntax_nodes
Sources/SwiftSyntax/gyb_generated/syntax_nodes
SyntaxDeclNodes.swift
SyntaxDeclNodes.swift
 280:322 (<1%)
2186:2228 (<1%)
 view
34 x 2 Sources/SwiftSyntax/gyb_generated
Sources/SwiftSyntax/gyb_generated
SyntaxCollections.swift
SyntaxCollections.swift
 1205:1262 (<1%)
6679:6736 (<1%)
 view
34 x 2 Sources/SwiftSyntax/gyb_generated
Sources/SwiftSyntax/gyb_generated
SyntaxCollections.swift
SyntaxCollections.swift
 1205:1262 (<1%)
6431:6488 (<1%)
 view
Duplicated Units
The list of top 1 duplicated units.
See data for all 1 unit duplicate
Size#FoldersFilesLinesCode
10 x 2 Sources/SwiftSyntax
Sources/SwiftSyntax
IncrementalParseTransition.swift
SyntaxClassifier.swift
 392:403 
176:187 
 view