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31.41 Expressions (supersedes IEEE 1364-2001 26.6.26)</div>
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1) For an operator whose type is vpiMultiConcat, the first operand shall be the multiplier expression. The remaining operands shall be the expressions within the concatenation. </p>
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2) The property vpiDecompile will return a string with a functionally equivalent expression to the original expression within the HDL. Parenthesis shall be added only to preserve precedence. Each operand and operator shall be separated by a single space character. No additional white space shall be added due to parenthesis. </p>
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3) New vpiOpTypes: vpiInsideOp, vpiMatchOp, vpiCastOp, vpiPreIncOp, vpiPostIncOp, vpiPreDecOp, vpiPostDecOp, vpiIffOp, vpiCycleDelayOp. The cast operation is represented as a unary operation, with its sole argument being the expression being cast, and the typespec of the cast expression being the type to which the argument is being cast. </p>
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4) New vpiConstType: vpiNullConst, vpiOneStepConst, vpiUnboundedConst. The constant vpiUnboundedConst represents the $ value used in assertion ranges. </p>
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5) The one to one relation to typespec must always be available for vpiCastOp operations and for simple expressions. For other expressions it is implementation dependent whether there is any associated typespec. </p>
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6) Variable slices are represented by part-selects whose parent simple expression is an array variable.</p></div>
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