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Dangling else

The dangling else is a problem in programming of parser generators in which an optional else clause in an if–then(–else) statement can make nested conditional statements ambiguous. Formally, the reference context-free grammar of the language is ambiguous, meaning there is more than one correct parse tree.

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Overview

Description

Approaches to avoid the issue

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Map overview Semantic statistics

Dangling else

Nodes29
Edges28
Triples9
Avg. degree1.93
Density0.068966
Components1

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Dangling else

Top relations

related to Avoiding ambiguity while keeping the syntax · 7
Dangling else → Depending, In, Java, Pascal, Programming, The, This
is a · 2
Dangling else → archetypal example of a shift-reduce conflict, problem in programming of parser generators in which an optional else clause in an if

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Important terminology

else grammar statements ambiguous may one statement problem parser ambiguity conflict programming languages dangling context-free examples avoid lr also executed

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Dangling elseis aproblem in programming of parser generators in which an optional else clause in an if0.90text
Dangling elseis aarchetypal example of a shift-reduce conflict0.90text
Dangling elserelated to Avoiding ambiguity while keeping the syntaxThis0.60section
Dangling elserelated to Avoiding ambiguity while keeping the syntaxThe0.60section
Dangling elserelated to Avoiding ambiguity while keeping the syntaxProgramming0.60section
Dangling elserelated to Avoiding ambiguity while keeping the syntaxPascal0.60section
Dangling elserelated to Avoiding ambiguity while keeping the syntaxJava0.60section
Dangling elserelated to Avoiding ambiguity while keeping the syntaxIn0.60section
Dangling elserelated to Avoiding ambiguity while keeping the syntaxDepending0.60section

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