notes/r2.0/dom ast/example-ast.txt

Example AST
===========

The Java program shown in source form first is followed by a representation
of of its AST.

================
package com.example;

import java.util.*;

public class HelloWorld {
	public static void main(String[] args) {
		System.out.println("Hello" + " world");
	}
}
================
<CompilationUnit
	package:
	<PackageDeclaration
		name:
		<QualifiedName
			qualifier: <SimpleName identifier: "com">
			name: <SimpleName identifier: "example">
		>
	>
	imports:
		[
		<ImportDeclaration
			name:
				<QualifiedName
					qualifier: <SimpleName identifier: "java">
					name: <SimpleName identifier: "util">
				>
			isOnDemand: true
		>
		]
	types:
		[
		<TypeDeclaration
			isInterface: false
			modifiers: IModifier.PUBLIC
			name:
				<SimpleName identifier: "HelloWorld">
			superclass: null
			superInterfaces: []
			bodyDeclarations:
				[
				<MethodDeclaration
					isConstructor: false
					modifiers: IModifier.PUBLIC | IModifier.STATIC
					selector: <SimpleName identifier: "main">
					returnType:
						<PrimitiveType primitiveTypeCode: PrimitiveType.VOID>
					parameters:
						[
						<SingleVariableDeclaration
							modifiers: IModifier.NONE
							type:
								<ArrayType
									componentType:
										<SimpleType
											name:
												<SimpleName identifier: "String">
										>
									>
								>
							name:
								<SimpleName identifier: "args">
							initializer: null
						>
						]
					thrownExceptions: []
					body:
						<Block
							statements:
								[
								<ExpressionStatement
									expression:
										<MethodInvocation
											expression:
												<QualifiedName
													qualifier:
														<SimpleName identifier: "System">
													name:
														<SimpleName identifier: "out">
												>
											name:
												<SimpleName identifier: "println">
											arguments:
												[
												<InfixExpression
													operator: InfixExpression.Operator.PLUS
													leftOperand:
														<StringLiteral escapedValue: "\"Hello\"">
													rightOperand:
														<StringLiteral escapedValue: "\" world\"">
													extendedOperands: []
												>
												]
										>
										]
								>
								]
						>
				>
				]
		]