I have a few simplistic code confusions

[Altera_Forum]

First question: 

Say we have:  a : STD_LOGIC_VECTOR(0 TO 4); b : STD_LOGIC_VECTOR(2 TO 6);  b <= "10100"; a <= b;   How do the bits get assigned to "a" here? Does it go like this: b ---------------- a bit2 -- goes to -- bit0 bit3 -- goes to -- bit1 bit4 -- goes to -- bit2 bit5 -- goes to -- bit3 bit6 -- goes to -- bit4   Likewise: Say we have:  a : STD_LOGIC_VECTOR(2 DOWNTO 0); b : STD_LOGIC_VECTOR(2 TO 9);  b <= "10100110"; a(2 DOWNTO 1) <= b(5 TO 6);   How do the bits get assigned to "a" here? Does it go like this: b ---------------- a bit5 -- goes to -- bit2 bit6 -- goes to -- bit1      Second question: When I'm looking at something like this, this is a logic gate/construct right?   b <= NOT(v) OR w OR (NOT(x) AND NOT(y) AND NOT(z));  I would just look at this in the same way as a logic diagram right? If NOTv is high OR w is high OR NOTx AND NOTy AND NOTz is high (all three), then b will be given a high?

[Altera_Forum]

1. Correct. The position always matches based assigning 'left <= 'left and so on. 

2. Yes, this is a logic construct. But be aware the synthesis tool will do logic reduction to remove unnecessary logic and may merge cells if they have the same function, etc. So any diagrams may not be identical to your code, but should be functionally identical.