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

Examples of com.google.gwt.dev.jjs.ast.JNullLiteral

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        triviallyFalse = true;
      }

      if (triviallyTrue) {
        // replace with a simple null test
        JNullLiteral nullLit = program.getLiteralNull();
        JBinaryOperation neq =
            new JBinaryOperation(x.getSourceInfo(), program.getTypePrimitiveBoolean(),
                JBinaryOperator.NEQ, x.getExpr(), nullLit);
        ctx.replaceMe(neq);
      } else if (triviallyFalse) {
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      if (program.typeOracle.canTriviallyCast(argType, toType)
          // don't depend on type-tightener having run
          || (program.typeOracle.willCrossCastLikeJso(argType) && program.typeOracle
          .willCrossCastLikeJso(toType))) {
        // trivially true if non-null; replace with a null test
        JNullLiteral nullLit = program.getLiteralNull();
        JBinaryOperation eq =
            new JBinaryOperation(x.getSourceInfo(), program.getTypePrimitiveBoolean(),
                JBinaryOperator.NEQ, x.getExpr(), nullLit);
        ctx.replaceMe(eq);
      } else {
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        triviallyFalse = true;
      }

      if (triviallyTrue) {
        // replace with a simple null test
        JNullLiteral nullLit = program.getLiteralNull();
        JBinaryOperation neq = new JBinaryOperation(program, x.getSourceInfo(),
            program.getTypePrimitiveBoolean(), JBinaryOperator.NEQ,
            x.getExpr(), nullLit);
        ctx.replaceMe(neq);
      } else if (triviallyFalse) {
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        ReplaceSideEffectsInLvalue replacer = new ReplaceSideEffectsInLvalue(
            multi);
        JExpression newLhs = replacer.accept(x.getLhs());
        localIndex = pushUsedLocals;

        JNullLiteral litNull = program.getLiteralNull();
        JBinaryOperation operation = new JBinaryOperation(program,
            x.getSourceInfo(), newLhs.getType(), JBinaryOperator.DIV, newLhs,
            x.getRhs());
        JBinaryOperation asg = new JBinaryOperation(program, x.getSourceInfo(),
            newLhs.getType(), JBinaryOperator.ASG, newLhs, operation);
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      JType argType = x.getExpr().getType();
      if (argType instanceof JClassType
          && program.typeOracle.canTriviallyCast((JClassType) argType,
              x.getTestType())) {
        // trivially true if non-null; replace with a null test
        JNullLiteral nullLit = program.getLiteralNull();
        JBinaryOperation eq = new JBinaryOperation(program, x.getSourceInfo(),
            program.getTypePrimitiveBoolean(), JBinaryOperator.NEQ,
            x.getExpr(), nullLit);
        ctx.replaceMe(eq);
      } else {
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Related Classes of com.google.gwt.dev.jjs.ast.JNullLiteral

  • com.google.gwt.dev.jjs.impl.CastNormalizer$ReplaceTypeChecksVisitor
  • com.google.gwt.dev.jjs.impl.CompoundAssignmentNormalizer$BreakupAssignOpsVisitor
  • com.google.gwt.dev.jjs.impl.ImplementCastsAndTypeChecks$ReplaceTypeChecksVisitor
  • com.google.gwt.dev.jjs.impl.TypeTightener$TightenTypesVisitor
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