Class StringInterpolationAsmGenerator

java.lang.Object

org.ek9lang.compiler.backend.jvm.AbstractAsmGenerator

org.ek9lang.compiler.backend.jvm.StringInterpolationAsmGenerator

All Implemented Interfaces:

Consumer<StringInterpolationInstr>

final class StringInterpolationAsmGenerator
extends AbstractAsmGenerator
implements Consumer<StringInterpolationInstr>

Generates JVM bytecode for STRING_INTERPOLATION IR instructions.

Uses invokedynamic with StringConcatFactory.makeConcatWithConstants(MethodHandles.Lookup, String, MethodType, String, Object...) for optimal string concatenation. This approach:

• Creates a single String allocation (no intermediate objects)
• No StringBuilder or temporary String objects
• JVM can inline and optimize the concatenation
• Matches how Java 9+ compiles string concatenation

The recipe string uses
as placeholder for dynamic arguments and literal text is embedded directly in the recipe.

Example:

// EK9: `Hello ${name}, count: ${count}`
// Recipe: "Hello 
, count: 
"
// Dynamic args: [name_str, count_str]

Field Summary

Fields inherited from class AbstractAsmGenerator

classWriter, constructTargetTuple

Constructor Summary

Constructors

Constructor	Description
StringInterpolationAsmGenerator(ConstructTargetTuple constructTargetTuple, OutputVisitor outputVisitor, org.objectweb.asm.ClassWriter classWriter)

Method Summary

Modifier and Type	Method	Description
void	accept(StringInterpolationInstr instr)	Generate JVM bytecode for a string interpolation instruction.

Methods inherited from class AbstractAsmGenerator

convertToJvmDescriptor, convertToJvmName, extractFieldName, generateBooleanLiteral, generateCharacterLiteral, generateDebugInfo, generateFloatLiteral, generateIntegerLiteral, generateLoadVariable, generateLocalVariableTable, generateMethodDescriptor, generateObjectLiteral, generateStackOperation, generateStoreVariable, generateStoreVariableAsInt, generateStringLiteral, getCurrentMethodVisitor, getFieldDescriptor, getMethodContext, getOrCreateLabel, getOwnerClassName, getVariableIndex, isFieldAccess, isVariableAllocated, isVariableFieldAccess, setCurrentMethodVisitor, setSharedMethodContext, trackTempVariableFromLiteral, trackTempVariableFromLoad

Methods inherited from class Object

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

Methods inherited from interface Consumer

andThen

Constructor Details

StringInterpolationAsmGenerator

StringInterpolationAsmGenerator(ConstructTargetTuple constructTargetTuple,
 OutputVisitor outputVisitor,
 org.objectweb.asm.ClassWriter classWriter)

Method Details

accept

public void accept(StringInterpolationInstr instr)

Generate JVM bytecode for a string interpolation instruction.

Processing steps:

1. Execute setup instructions ($ conversions for non-String expressions)
2. Build recipe string from literal parts
3. Collect dynamic argument variable names
4. Load all dynamic arguments onto stack
5. Emit invokedynamic with StringConcatFactory
6. Store result

Specified by:

accept in interface Consumer<StringInterpolationInstr>