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8.1 Compound Addition and Assignment

void operator+=(int x, int y)
x += y is equivalent to x = x + y.

void operator+=(real x, real y)
x += y is equivalent to x = x + y.

void operator+=(vector x, real y)
x += y is equivalent to x = x + y.

void operator+=(row_vector x, real y)
x += y is equivalent to x = x + y.

void operator+=(matrix x, real y)
x += y is equivalent to x = x + y.

void operator+=(vector x, vector y)
x += y is equivalent to x = x + y.

void operator+=(row_vector x, row_vector y)
x += y is equivalent to x = x + y.

void operator+=(matrix x, matrix y)
x += y is equivalent to x = x + y.