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Use cases:
* We want to break out some code to a separate function,
but there are outbound gotos or accesses to local variables.
* We want to inline some recurring pattern (with access to
gotos and local variables).
Goals:
* Avoid deep indentation and large functions.
* Isolate interface/implementation so the function can be type-checked etc.
on it's own (but not necessarily compiled, since needs to be inlined).
* Make it clear which variables are used/modified and not.
Syntax ideas:
Option 1 (simple paste):
snippet swap_if_nonzero(int someparam)
using var int somevar
using var int othervar
using goto end
using return int {
if someparam == 0 goto error
if somevar == 0 return -1
int tmp = somevar
somevar = othervar
othervar = tmp
}
func f(int x) -> int {
var int somevar
var int othervar
...
paste swap_if_nonzero(x)
return somevar
error:
...
}
Option 2 ("function" paste):
snippet swap_if_nonzero(int someparam) -> int
using var int somevar
using var int othervar
using goto end {
if someparam == 0 goto error
if somevar == 0 return -1
int tmp = somevar
somevar = othervar
othervar = tmp
return somevar
}
func f(int x) -> int {
var int somevar
var int othervar
...
return paste swap_if_nonzero(x)
error:
...
}
Option 3 (typed paste):
snippet type swapsnippet(int someparam)
using var int somevar
using var int othervar
using goto end
using return int
snippet swapsnippet swap_if_nonzero
if someparam == 0 goto error
if somevar == 0 return -1
int tmp = somevar
somevar = othervar
othervar = tmp
}
func f(int x) -> int {
var int somevar
var int othervar
...
paste swap_if_nonzero(x)
return somevar
error:
...
}
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