TOperatorJumpTable::MakeError

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Unreal Engine C++ API Reference > Runtime > Core > Misc > TOperatorJumpTable

References

&42;return MakeError  
&40;  
    FExpressionError(LOCTEXT("DivisionByZero","Division by zero."))  
&41;  
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&42;return MakeError &40;     FExpressionError(LOCTEXT("DivisionByZero","Division by zero.")) &41;

Remarks

Map an expression node to a binary operator with the specified implementation.

The callable type must match the declaration Ret(OperandL, OperandR, [, Context]), where: Ret = Any DEFINE_EXPRESSION_NODE_TYPE type, OR FExpressionResult OperandL = Any DEFINE_EXPRESSION_NODE_TYPE type OperandR = Any DEFINE_EXPRESSION_NODE_TYPE type Context = (optional) const ptr to user-supplied arbitrary context

Examples that binds a '/' token to a function that attempts to do a division: JumpTable.MapUnary({ return A / B; }); // Runtime exception on div/0 JumpTable.MapUnary({ if (!Ctxt->IsMathEnabled()) { return A; } return A / B; // Runtime exception on div/0 }); JumpTable.MapUnary( -> FExpressionResult { if (!Ctxt->IsMathEnabled()) { return MakeError(FExpressionError(LOCTEXT("MathNotEnabled", "Math is not enabled."))); } else if (B == 0) { /** Map an expression node to a binary operator with the specified implementation.

The callable type must match the declaration Ret(OperandL, OperandR, [, Context]), where: Ret = Any DEFINE_EXPRESSION_NODE_TYPE type, OR FExpressionResult OperandL = Any DEFINE_EXPRESSION_NODE_TYPE type OperandR = Any DEFINE_EXPRESSION_NODE_TYPE type Context = (optional) const ptr to user-supplied arbitrary context

Examples that binds a '/' token to a function that attempts to do a division: JumpTable.MapUnary({ return A / B; }); // Runtime exception on div/0 JumpTable.MapUnary({ if (!Ctxt->IsMathEnabled()) { return A; } return A / B; // Runtime exception on div/0 }); JumpTable.MapUnary( -> FExpressionResult { if (!Ctxt->IsMathEnabled()) { return MakeError(FExpressionError(LOCTEXT("MathNotEnabled", "Math is not enabled."))); } else if (B == 0) { /**