Package com.google.gwt.dev.jjs.ast.js

Examples of com.google.gwt.dev.jjs.ast.js.JMultiExpression

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          JExpressionStatement stmtExpr = (JExpressionStatement) stmt;
          if (stmtExpr.getExpr() instanceof JMultiExpression) {
            // Promote a multi's expressions to the current block
            x.removeStmt(i);
            int start = i;
            JMultiExpression multi = ((JMultiExpression) stmtExpr.getExpr());
            for (JExpression expr : multi.getExpressions()) {
              x.addStmt(i++, expr.makeStatement());
            }
            i = start - 1;
            continue;
          }
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      JExpression replacement;
      if (exprs.size() == 1) {
        replacement = exprs.get(0);
      } else {
        replacement = new JMultiExpression(x.getSourceInfo(), exprs);
      }

      ctx.replaceMe(this.accept(replacement));
    }
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       */
      if (ignoringExpressionOutput.contains(x)) {
        if (!x.getTarget().isEmpty()) {
          return;
        }
        JMultiExpression multi = new JMultiExpression(x.getSourceInfo());
        multi.addExpressions(x.getArgs());
        if (x.hasClinit()) {
          multi.addExpressions(
              createClinitCall(x.getSourceInfo(), x.getTarget().getEnclosingType()));
        }
        ignoringExpressionOutput.add(multi);
        ctx.replaceMe(this.accept(multi));
        ignoringExpressionOutput.remove(multi);
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        lvalues.remove(x.getArg());
      }

      if (isNonEmptyMultiExpression(x.getArg())) {
        List<JExpression> expressions = ((JMultiExpression) x.getArg()).getExpressions();
        JMultiExpression result = new JMultiExpression(x.getArg().getSourceInfo(),
            expressions.subList(0, expressions.size() - 1));
        result.addExpressions(new JPostfixOperation(x.getSourceInfo(), x.getOp(),
            expressions.get(expressions.size() - 1)));
        ctx.replaceMe(result);
        return;
      }
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      }

      // If the argument is a multiexpression restructure it if possible.
      if (isNonEmptyMultiExpression(x.getArg())) {
        List<JExpression> expressions = ((JMultiExpression) x.getArg()).getExpressions();
        JMultiExpression result = new JMultiExpression(x.getArg().getSourceInfo(),
            expressions.subList(0, expressions.size() - 1));
        result.addExpressions(new JPrefixOperation(x.getSourceInfo(), x.getOp(),
            expressions.get(expressions.size() - 1)));
        ctx.replaceMe(result);
        return;
      }
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    }

    private JExpression makeReplacementForAssignment(SourceInfo info, JVariableRef variableRef,
        JExpression rhs) {
      // Replace with a multi, which may wind up empty.
      JMultiExpression multi = new JMultiExpression(info);

      // If the lhs is a field ref, evaluate it first.
      if (variableRef instanceof JFieldRef) {
        JFieldRef fieldRef = (JFieldRef) variableRef;
        JExpression instance = fieldRef.getInstance();
        if (instance != null) {
          multi.addExpressions(instance);
        }
      }

      // If there is an rhs, evaluate it second.
      if (rhs != null) {
        multi.addExpressions(rhs);
      }
      if (multi.getNumberOfExpressions() == 1) {
        return multi.getExpression(0);
      } else {
        return multi;
      }
    }
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    }

    private void replaceForPrunedParameters(JMethodCall x, JMethodCall newCall, Context ctx) {
      assert !x.getTarget().canBePolymorphic();
      List<JParameter> originalParams = methodToOriginalParamsMap.get(x.getTarget());
      JMultiExpression currentMulti = null;
      for (int i = 0, c = x.getArgs().size(); i < c; ++i) {
        JExpression arg = x.getArgs().get(i);
        JParameter param = null;
        if (i < originalParams.size()) {
          param = originalParams.get(i);
        }

        if (param != null && referencedNonTypes.contains(param)) {
          // If there is an existing multi, terminate it.
          if (currentMulti != null) {
            currentMulti.addExpressions(arg);
            newCall.addArg(currentMulti);
            currentMulti = null;
          } else {
            newCall.addArg(arg);
          }
        } else if (arg.hasSideEffects()) {
          // The argument is only needed for side effects, add it to a multi.
          if (currentMulti == null) {
            currentMulti = new JMultiExpression(x.getSourceInfo());
          }
          currentMulti.addExpressions(arg);
        }
      }

      // Add any orphaned parameters on the end. Extra params are OK.
      if (currentMulti != null) {
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            if (call.getArgs().isEmpty()) {
              ctx.removeMe();
            } else if (call.getArgs().size() == 1) {
              ctx.replaceMe(call.getArgs().get(0).makeStatement());
            } else {
              JMultiExpression multi = new JMultiExpression(call.getSourceInfo());
              multi.addExpressions(call.getArgs());
              ctx.replaceMe(multi.makeStatement());
            }
          }
        }
      }
    }
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    int numberOfExpressions = expressions.size();
    JExpression result = expressions.get(numberOfExpressions - 1);

    numberOfExpressions = expressions.size();
    if (numberOfExpressions == 0) {
      return new JMultiExpression(SourceOrigin.UNKNOWN);
    }

    expressions =  Lists.newArrayList(Collections2.filter(
        expressions.subList(0, numberOfExpressions - 1),
        Predicates.and(
            Predicates.notNull(),
            new Predicate<JExpression>() {
              @Override
              public boolean apply(JExpression expression) {
                return expression.hasSideEffects();
              }
            })));

    if (result != null && (!ignoringResult || result.hasSideEffects())) {
      expressions.add(result);
    }

    if (expressions.size() == 1) {
      // Do not create a multi expression if it consists only of the result.
      return expressions.iterator().next();
    }

    SourceInfo info = expressions.size() > 0 ? expressions.get(0).getSourceInfo() :
        SourceOrigin.UNKNOWN;
    return new JMultiExpression(info, expressions);
  }
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          JExpressionStatement stmtExpr = (JExpressionStatement) stmt;
          if (stmtExpr.getExpr() instanceof JMultiExpression) {
            // Promote a multi's expressions to the current block
            x.removeStmt(i);
            int start = i;
            JMultiExpression multi = ((JMultiExpression) stmtExpr.getExpr());
            for (JExpression expr : multi.exprs) {
              x.addStmt(i++, expr.makeStatement());
            }
            i = start - 1;
            continue;
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Related Classes of com.google.gwt.dev.jjs.ast.js.JMultiExpression

  • com.google.gwt.dev.jjs.ast.JExpression
  • com.google.gwt.dev.jjs.impl.CloneExpressionVisitor
  • com.google.gwt.dev.jjs.impl.CompoundAssignmentNormalizer$BreakupAssignOpsVisitor
  • com.google.gwt.dev.jjs.impl.DeadCodeElimination$DeadCodeVisitor
  • com.google.gwt.dev.jjs.impl.GwtAstBuilder
  • com.google.gwt.dev.jjs.impl.JavaScriptObjectNormalizer$NormalizeVisitor
  • com.google.gwt.dev.jjs.impl.JjsUtils
  • com.google.gwt.dev.jjs.impl.JsoDevirtualizer
  • com.google.gwt.dev.jjs.impl.MakeCallsStatic
  • com.google.gwt.dev.jjs.impl.MakeCallsStatic$StaticCallConverter
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