Class ConstantCoalescingOrError

java.lang.Object

org.ek9lang.compiler.common.RuleSupport

org.ek9lang.compiler.common.TypedSymbolAccess

org.ek9lang.compiler.phase5.ConstantCoalescingOrError

All Implemented Interfaces:

Consumer<EK9Parser.ExpressionContext>

final class ConstantCoalescingOrError
extends TypedSymbolAccess
implements Consumer<EK9Parser.ExpressionContext>

Detects coalescing expressions where both operands are literals (E08094).

Expressions like 5 <? 3 (always 3), "alpha" >? "beta" (always "beta"), or 1.0 <=? 2.0 (always 1.0) have predetermined results and indicate logic errors, dead code, or copy-paste mistakes.

Exemptions: coalescing expressions inside require, assert, and constrain statements are not flagged, as these are test assertions where literal expressions serve a documentation purpose.

Only the coalescing comparison operators (<?, >?, <=?, >=?) are checked. These use ctx.coalescing_equality in the grammar, not ctx.op.

Field Summary

Fields inherited from class RuleSupport

errorListener, symbolsAndScopes

Constructor Summary

Constructors

Constructor	Description
ConstantCoalescingOrError(SymbolsAndScopes symbolsAndScopes, ErrorListener errorListener)

Method Summary

Modifier and Type	Method	Description
void	accept(EK9Parser.ExpressionContext ctx)

Methods inherited from class TypedSymbolAccess

getRecordedAndTypedSymbol, isProcessingScopePure, recordATypedSymbol

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface Consumer

andThen

Constructor Details

ConstantCoalescingOrError

ConstantCoalescingOrError(SymbolsAndScopes symbolsAndScopes,
 ErrorListener errorListener)

Method Details

accept

public void accept(EK9Parser.ExpressionContext ctx)

Specified by:

accept in interface Consumer<EK9Parser.ExpressionContext>