add type promotion for complex and real number.

[zxcd]

PR Category

Others

PR Types

New features

Description

card-78750

As there were unreasonable type promotion in Paddle, which the previous logic was aligned to the left tensor, like:

a = paddle.ones([3,3], dtype= ''int64")
b = paddle.ones([3,3], dtype = 'float32')
a+b # int64

This behavior will be fixed more in line with mathematical logic, like:

a = paddle.ones([3,3], dtype= ''int64")
b = paddle.ones([3,3], dtype = 'float32')
a+b # float32

Furthermore, after discussion, we will limit the behavior of automatic type promotion to floating-point numbers, and between real and complex numbers in Tensor and Tensor. Tensor and Scalar will still support all dtypes.

## Before:
a = paddle.ones([3,3], dtype= ''int32")
b = paddle.ones([3,3], dtype = 'int64')
a+b # int64

## After:
a = paddle.ones([3,3], dtype= ''int32")
b = paddle.ones([3,3], dtype = 'int64')
a+b # raise TypeError

Those PR https://github.com/PaddlePaddle/Paddle/pull/60638 , https://github.com/PaddlePaddle/Paddle/pull/59518 fixed the behavior in few APIs between floating-point numbers in Tensor and Tensor.

This PR will support all binary operation API, and type promotion between real and complex numbers in Tensor and Tensor. Also the behavior between Tensor and Scalar will be corrected.

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