Put placeholder and default value in yassnippet

Question

I would like to create a yassnippet with a placeholder, so something like

value = $1(insert_value)

with the meaning that I would like to see the text "insert value" but when I press TAB and then type something, the text is replaced.

I would also like that the placeholder actually becomes a real text if I do not press TAB or I press TAB twice.

How these things can me done? Thank you

Answer 1

The behavior you describe is provided by placeholder fields, such as ${1:default value}. After pressing tab once to navigate to the field, you can type a replacement value. Or you can hit tab again to keep the default.