Examples of com.google.gwt.dev.js.ast.JsBlock

com.google.gwt.dev.js.ast.JsBlock
Represents a JavaScript block statement.

           * This indicates that the function was attached to a clause of a
           * control function and not into an existing block. We'll replace the
           * single JsExprStmt with a JsBlock that contains all of the
           * statements.
           */
          JsBlock b = new JsBlock(x.getSourceInfo().makeChild(
              InliningVisitor.class, "Block required for control function"));
          b.getStatements().addAll(statements);
          ctx.replaceMe(b);
          return;


        } else {
          // Insert the new statements into the original context

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    public void endVisit(JsFunction x, JsContext<JsExpression> ctx) {
      if (!functionStack.pop().equals(x)) {
        throw new InternalCompilerException("Unexpected function popped");
      }


      JsBlock body = x.getBody();
      List<JsName> newLocalVariables = newLocalVariableStack.pop();


      addVars(x, body, newLocalVariables);
    }

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     */
    @Override
    public boolean visit(JsProgramFragment x, JsContext<JsProgramFragment> ctx) {
      programFunction = new JsFunction(program.getSourceInfo(),
          program.getScope());
      programFunction.setBody(new JsBlock(x.getSourceInfo()));
      functionStack.push(programFunction);
      newLocalVariableStack.push(new ArrayList<JsName>());
      return true;
    }

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        while (statements.size() > MAX_BLOCK_SIZE && i.hasNext()) {
          JsStatement current = i.next();


          if (statementsInNewBlock == null) {
            // Replace the current statement with a new block
            JsBlock newBlock = new JsBlock(sourceInfo);
            statementsInNewBlock = newBlock.getStatements();
            i.set(newBlock);
          } else {
            /*
             * There's an open replacement block, remove the statement from its
             * current block.

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      for (int i = 0; i < stmts.size(); i++) {
        JsStatement stmt = stmts.get(i);


        if (stmt instanceof JsBlock) {
          // Promote a sub-block's children to the current block.
          JsBlock block = (JsBlock) stmt;
          stmts.remove(i);
          stmts.addAll(i, block.getStatements());
          i--;
          didChange = true;
          continue;
        }

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        if (cond.isBooleanFalse()) {
          // Unless it contains break/continue statements
          FindBreakContinueStatementsVisitor visitor = new FindBreakContinueStatementsVisitor();
          visitor.accept(x.getBody());
          if (!visitor.hasBreakContinueStatements()) {
            JsBlock block = new JsBlock(makeSourceInfo(x,
                "Simplified always-false condition"));
            block.getStatements().add(x.getBody());
            block.getStatements().add(expr.makeStmt());
            ctx.replaceMe(accept(block));
          }
        }
      }
    }

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      if (expr instanceof CanBooleanEval) {
        CanBooleanEval cond = (CanBooleanEval) expr;


        // If false, replace with initializers and condition.
        if (cond.isBooleanFalse()) {
          JsBlock block = new JsBlock(makeSourceInfo(x,
              "Simplified always-false condition"));
          if (x.getInitExpr() != null) {
            block.getStatements().add(x.getInitExpr().makeStmt());
          }
          if (x.getInitVars() != null) {
            block.getStatements().add(x.getInitVars());
          }
          block.getStatements().add(expr.makeStmt());
          JsStatement decls = ensureDeclarations(x.getBody());
          if (decls != null) {
            block.getStatements().add(decls);
          }
          ctx.replaceMe(accept(block));
        }
      }
    }

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      if (expr instanceof CanBooleanEval) {
        CanBooleanEval cond = (CanBooleanEval) expr;


        // If false, replace with condition.
        if (cond.isBooleanFalse()) {
          JsBlock block = new JsBlock(makeSourceInfo(x,
              "Simplified always-false condition"));
          block.getStatements().add(expr.makeStmt());
          JsStatement decls = ensureDeclarations(x.getBody());
          if (decls != null) {
            block.getStatements().add(decls);
          }
          ctx.replaceMe(accept(block));
        }
      }
    }

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      if (stmts.isEmpty()) {
        return null;
      } else if (stmts.size() == 1) {
        return stmts.get(0);
      } else {
        JsBlock jsBlock = new JsBlock(makeSourceInfo(stmt,
            "Ensuring declarations"));
        jsBlock.getStatements().addAll(stmts);
        return jsBlock;
      }
    }

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    private boolean tryStaticEvalIf(JsIf x, CanBooleanEval cond,
        JsContext<JsStatement> ctx) {
      JsStatement thenStmt = x.getThenStmt();
      JsStatement elseStmt = x.getElseStmt();
      if (cond.isBooleanTrue()) {
        JsBlock block = new JsBlock(makeSourceInfo(x,
            "Simplified always-true condition"));
        block.getStatements().add(x.getIfExpr().makeStmt());
        if (thenStmt != null) {
          block.getStatements().add(thenStmt);
        }
        JsStatement decls = ensureDeclarations(elseStmt);
        if (decls != null) {
          block.getStatements().add(decls);
        }
        ctx.replaceMe(accept(block));
        return true;
      } else if (cond.isBooleanFalse()) {
        JsBlock block = new JsBlock(makeSourceInfo(x,
            "Simplified always-false condition"));
        block.getStatements().add(x.getIfExpr().makeStmt());
        if (elseStmt != null) {
          block.getStatements().add(elseStmt);
        }
        JsStatement decls = ensureDeclarations(thenStmt);
        if (decls != null) {
          block.getStatements().add(decls);
        }
        ctx.replaceMe(accept(block));
        return true;
      } else {
        return false;

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