Class Lexer

java.lang.Object

ca.mcscert.jpipe.compiler.model.Transformation<org.antlr.v4.runtime.CharStream, org.antlr.v4.runtime.CommonTokenStream>

ca.mcscert.jpipe.compiler.steps.transformations.Lexer

public final class Lexer
extends Transformation<org.antlr.v4.runtime.CharStream, org.antlr.v4.runtime.CommonTokenStream>

Delegate to ANTLR the task of "lexing" the character stream into relevant tokens.

Lexing errors are reported as non-fatal diagnostics via the CompilationContext, allowing subsequent steps (e.g. the parser) to still run and accumulate further errors before the pipeline decides to abort.

Nested Class Summary

Nested classes/interfaces inherited from class Transformation

Transformation.Step<I,O>

Field Summary

Fields inherited from class Transformation

logger

Constructor Summary

Constructors

Constructor	Description
Lexer()

Method Summary

Modifier and Type	Method	Description
protected org.antlr.v4.runtime.CommonTokenStream	run(org.antlr.v4.runtime.CharStream input, CompilationContext ctx)	Business logic of this step.

Methods inherited from class Transformation

andThen, fire, of, shouldLog, stepName

Methods inherited from class Object

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

Constructor Details

Lexer

public Lexer()

Method Details

run

protected org.antlr.v4.runtime.CommonTokenStream run(org.antlr.v4.runtime.CharStream input,
 CompilationContext ctx)

Description copied from class: Transformation

Business logic of this step. Must not return null; may throw any exception. Use ctx to report non-fatal diagnostics or inspect previously accumulated errors.

Specified by:

run in class Transformation<org.antlr.v4.runtime.CharStream, org.antlr.v4.runtime.CommonTokenStream>

Parameters:

input - the value produced by the previous step.

ctx - compilation context carrying the source path and diagnostic bag.

Returns:

the transformed value — never null.