3 Array Expressions ¶

Array expressions in Blitz++ are implemented using the expression templates technique. Unless otherwise noted, expression evaluation will never generate temporaries or multiple loops; an expression such as

Array<int,1> A, B, C, D;    // ...

A = B + C + D;

will result in code similar to

for (int i=A.lbound(firstDim); i <= A.ubound(firstDim); ++i)
    A[i] = B[i] + C[i] + D[i];

• Expression evaluation order
• Expression operands
• Array operands
• Expression operators
• Assignment operators
• Index placeholders
• Type promotion
• Single-argument math functions
• Two-argument math functions
• Declaring your own math functions on arrays
• Tensor notation
• Array reductions
• Complete reductions
• Partial Reductions
• where statements