diff dmd/Catch.d @ 0:10317f0c89a5

Initial commit
author korDen
date Sat, 24 Oct 2009 08:42:06 +0400
parents
children cab4c37afb89
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dmd/Catch.d	Sat Oct 24 08:42:06 2009 +0400
@@ -0,0 +1,88 @@
+module dmd.Catch;
+
+import dmd.Loc;
+import dmd.Type;
+import dmd.Scope;
+import dmd.Identifier;
+import dmd.VarDeclaration;
+import dmd.Statement;
+import dmd.OutBuffer;
+import dmd.Id;
+import dmd.TypeIdentifier;
+import dmd.Util;
+import dmd.ScopeDsymbol;
+import dmd.HdrGenState;
+import dmd.BE;
+
+class Catch
+{
+    Loc loc;
+    Type type;
+    Identifier ident;
+    VarDeclaration var = null;
+    Statement handler;
+
+    this(Loc loc, Type t, Identifier id, Statement handler)
+	{
+		//printf("Catch(%s, loc = %s)\n", id.toChars(), loc.toChars());
+		this.loc = loc;
+		this.type = t;
+		this.ident = id;
+		this.handler = handler;
+	}
+
+    Catch syntaxCopy()
+	{
+		assert(false);
+	}
+
+    void semantic(Scope sc)
+	{
+		ScopeDsymbol sym;
+
+		//printf("Catch.semantic(%s)\n", ident.toChars());
+
+	version (IN_GCC) {
+	} else {
+		if (sc.tf)
+		{
+			/* This is because the _d_local_unwind() gets the stack munged
+			 * up on this. The workaround is to place any try-catches into
+			 * a separate function, and call that.
+			 * To fix, have the compiler automatically convert the finally
+			 * body into a nested function.
+			 */
+			error(loc, "cannot put catch statement inside finally block");
+		}
+	}
+
+		sym = new ScopeDsymbol();
+		sym.parent = sc.scopesym;
+		sc = sc.push(sym);
+
+		if (!type)
+			type = new TypeIdentifier(Loc(0), Id.Object_);
+		type = type.semantic(loc, sc);
+		if (!type.toBasetype().isClassHandle())
+			error("can only catch class objects, not '%s'", type.toChars());
+		else if (ident)
+		{
+			var = new VarDeclaration(loc, type, ident, null);
+			var.parent = sc.parent;
+			sc.insert(var);
+		}
+		handler = handler.semantic(sc);
+
+		sc.pop();
+	}
+
+    BE blockExit()
+	{
+		return handler ? handler.blockExit() : BE.BEfallthru;
+	}
+
+    void toCBuffer(OutBuffer buf, HdrGenState* hgs)
+	{
+		assert(false);
+	}
+}
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