X-Git-Url: http://secure.phpeclipse.com

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Block.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Block.java
new file mode 100644
index 0000000..2e00658
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Block.java
@@ -0,0 +1,160 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v0.5 
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v05.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ ******************************************************************************/
+package net.sourceforge.phpdt.internal.compiler.ast;
+
+import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
+import net.sourceforge.phpdt.internal.compiler.codegen.*;
+import net.sourceforge.phpdt.internal.compiler.flow.*;
+import net.sourceforge.phpdt.internal.compiler.lookup.*;
+
+public class Block extends Statement {
+	
+	public Statement[] statements;
+	public int explicitDeclarations;
+	// the number of explicit declaration , used to create scope
+	public BlockScope scope;
+	public static final Block None = new Block(0);
+	
+	public Block(int explicitDeclarations) {
+		this.explicitDeclarations = explicitDeclarations;
+	}
+	
+	public FlowInfo analyseCode(
+		BlockScope currentScope,
+		FlowContext flowContext,
+		FlowInfo flowInfo) {
+
+		// empty block
+		if (statements == null)
+			return flowInfo;
+		for (int i = 0, max = statements.length; i < max; i++) {
+			Statement stat;
+			if (!flowInfo.complainIfUnreachable((stat = statements[i]), scope)) {
+				flowInfo = stat.analyseCode(scope, flowContext, flowInfo);
+			}
+		}
+		return flowInfo;
+	}
+
+	public static final Block EmptyWith(int sourceStart, int sourceEnd) {
+
+		//return an empty block which position is s and e
+		Block bk = new Block(0);
+		bk.sourceStart = sourceStart;
+		bk.sourceEnd = sourceEnd;
+		return bk;
+	}
+
+	/**
+	 * Code generation for a block
+	 */
+	public void generateCode(BlockScope currentScope, CodeStream codeStream) {
+
+		if ((bits & IsReachableMASK) == 0) {
+			return;
+		}
+		int pc = codeStream.position;
+		if (statements != null) {
+			for (int i = 0, max = statements.length; i < max; i++) {
+				statements[i].generateCode(scope, codeStream);
+			}
+		} // for local variable debug attributes
+		if (scope != currentScope) { // was really associated with its own scope
+			codeStream.exitUserScope(scope);
+		}
+		codeStream.recordPositionsFrom(pc, this.sourceStart);
+	}
+
+	public boolean isEmptyBlock() {
+
+		return statements == null;
+	}
+
+	public void resolve(BlockScope upperScope) {
+
+		if (statements != null) {
+			scope =
+				explicitDeclarations == 0
+					? upperScope
+					: new BlockScope(upperScope, explicitDeclarations);
+			int i = 0, length = statements.length;
+			while (i < length)
+				statements[i++].resolve(scope);
+		}
+	}
+
+	public void resolveUsing(BlockScope givenScope) {
+
+		// this optimized resolve(...) is sent only on none empty blocks
+		scope = givenScope;
+		if (statements != null) {
+			int i = 0, length = statements.length;
+			while (i < length)
+				statements[i++].resolve(scope);
+		}
+	}
+
+	public String toString(int tab) {
+
+		String s = tabString(tab);
+		if (this.statements == null) {
+			s += "{\n"; //$NON-NLS-1$
+			s += tabString(tab);
+			s += "}"; //$NON-NLS-1$
+			return s;
+		}
+		s += "{\n"; //$NON-NLS-1$
+		s += this.toStringStatements(tab);
+		s += tabString(tab);
+		s += "}"; //$NON-NLS-1$
+		return s;
+	}
+
+	public String toStringStatements(int tab) {
+
+		if (this.statements == null)
+			return ""; //$NON-NLS-1$
+		StringBuffer buffer = new StringBuffer();
+		for (int i = 0; i < statements.length; i++) {
+			buffer.append(statements[i].toString(tab + 1));
+			if (statements[i] instanceof Block) {
+				buffer.append("\n"); //$NON-NLS-1$
+			} else {
+				buffer.append(";\n"); //$NON-NLS-1$
+			}
+		};
+		return buffer.toString();
+	}
+
+	public void traverse(
+		IAbstractSyntaxTreeVisitor visitor,
+		BlockScope blockScope) {
+
+		if (visitor.visit(this, blockScope)) {
+			if (statements != null) {
+				int statementLength = statements.length;
+				for (int i = 0; i < statementLength; i++)
+					statements[i].traverse(visitor, scope);
+			}
+		}
+		visitor.endVisit(this, blockScope);
+	}
+	
+	/**
+	 * Dispatch the call on its last statement.
+	 */
+	public void branchChainTo(Label label) {
+		 if (this.statements != null) {
+		 	this.statements[statements.length - 1].branchChainTo(label);
+		 }
+	}
+	
+}
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