Class PreferStringInterpolationOrError

java.lang.Object

org.ek9lang.compiler.phase5.PreferStringInterpolationOrError

All Implemented Interfaces:

Consumer<EK9Parser.ExpressionContext>

final class PreferStringInterpolationOrError
extends Object
implements Consumer<EK9Parser.ExpressionContext>

Detects string concatenation chains with 3 or more parts and recommends string interpolation instead (E11068).

EK9 has a bespoke STRING_INTERPOLATION IR instruction that backends optimise to a single allocation. In contrast, each + on strings calls the pure _add operator, creating a new intermediate String object per operation. A chain of a + " " + b + " " + c creates 4 temporaries; the equivalent interpolation `${a} ${b} ${c}` creates 1.

Only flags chains at the root of the left-associative tree to prevent double-reporting. Non-String addition (arithmetic) is ignored via a type check.

Constructor Summary

Constructors

Constructor	Description
PreferStringInterpolationOrError(SymbolsAndScopes symbolsAndScopes, ErrorListener errorListener)

Method Summary

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

Methods inherited from class Object

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

Methods inherited from interface Consumer

andThen

Constructor Details

PreferStringInterpolationOrError

PreferStringInterpolationOrError(SymbolsAndScopes symbolsAndScopes,
 ErrorListener errorListener)

Method Details

accept

public void accept(EK9Parser.ExpressionContext ctx)

Specified by:

accept in interface Consumer<EK9Parser.ExpressionContext>