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solving when problem

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This commit is contained in:
Pavel Talanov
2012-01-30 20:22:16 +04:00
parent b377e74a23
commit 746714bb5e
6 changed files with 308 additions and 484 deletions
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js/src/com/google/dart/compiler/util/AstUtil.java
+33
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@@ -328,6 +328,10 @@ public class AstUtil {
return equals(expression, program.getTrueLiteral());
}
public static JsExpression assignment(JsExpression left, JsExpression right) {
return new JsBinaryOperation(JsBinaryOperator.ASG, left, right);
}
public static JsBinaryOperation sum(JsExpression left, JsExpression right) {
return new JsBinaryOperation(JsBinaryOperator.ADD, left, right);
}
@@ -343,4 +347,33 @@ public class AstUtil {
public static JsBinaryOperation typeof(JsExpression expression, JsStringLiteral string) {
return equals(new JsPrefixOperation(JsUnaryOperator.TYPEOF, expression), string);
}
public static interface Mutator {
public JsNode mutate(JsNode node);
}
//TODO: refactor and review
public static JsNode mutateLastExpression(JsNode node, Mutator mutator) {
if (node instanceof JsBlock) {
JsBlock block = (JsBlock) node;
List<JsStatement> statements = block.getStatements();
int size = statements.size();
statements.set(size - 1,
AstUtil.convertToStatement(mutateLastExpression(statements.get(size - 1), mutator)));
return block;
}
if (node instanceof JsIf) {
JsIf ifExpr = (JsIf) node;
ifExpr.setThenStmt(AstUtil.convertToStatement(mutateLastExpression(ifExpr.getThenStmt(), mutator)));
JsStatement elseStmt = ifExpr.getElseStmt();
if (elseStmt != null) {
ifExpr.setElseStmt(AstUtil.convertToStatement(mutateLastExpression(elseStmt, mutator)));
}
return ifExpr;
}
if (node instanceof JsExprStmt) {
return AstUtil.convertToStatement(mutateLastExpression(((JsExprStmt) node).getExpression(), mutator));
}
return mutator.mutate(node);
}
}