mirror of
https://github.com/nim-lang/Nim.git
synced 2025-12-29 01:14:41 +00:00
2bd1aa186e
* New/better macro pragmas, make some experimental fix #15920, close #18212, close #14781, close #6696, close https://github.com/nim-lang/RFCs/issues/220 Variable macro pragmas have been changed to only take a unary section node. They can now also be applied in sections with multiple variables, as well as `const` sections. They also accept arguments. Templates now support macro pragmas, mirroring other routine types. Type and variable macro pragmas have been made experimental. Symbols without parentheses instatiating nullary macros or templates has also been documented in the experimental manual. A check for a redefinition error based on the left hand side of variable definitions when using variable macro pragmas was disabled. This nerfs `byaddr` specifically, however this has been documented as a consequence of the experimental features `byaddr` uses. Given how simple these changes are I'm worried if I'm missing something. * accomodate compiler boot * allow weird pragmas * add test for #10994 * remove some control flow, try remove some logic
50 lines
971 B
Nim
50 lines
971 B
Nim
discard """
|
|
targets: "c cpp js"
|
|
"""
|
|
|
|
import std/decls
|
|
|
|
template fun() =
|
|
var s = @[10,11,12]
|
|
var a {.byaddr.} = s[0]
|
|
a+=100
|
|
doAssert s == @[110,11,12]
|
|
doAssert a is int
|
|
var b {.byaddr.}: int = s[0]
|
|
doAssert a.addr == b.addr
|
|
|
|
when false:
|
|
# template specific redeclaration issue
|
|
# see https://github.com/nim-lang/Nim/issues/8275
|
|
doAssert not compiles(block:
|
|
# redeclaration not allowed
|
|
var foo = 0
|
|
var foo {.byaddr.} = s[0])
|
|
|
|
doAssert not compiles(block:
|
|
# ditto
|
|
var foo {.byaddr.} = s[0]
|
|
var foo {.byaddr.} = s[0])
|
|
|
|
block:
|
|
var b {.byaddr.} = s[1] # redeclaration ok in sub scope
|
|
b = 123
|
|
|
|
doAssert s == @[110,123,12]
|
|
|
|
b = b * 10
|
|
doAssert s == @[1100,123,12]
|
|
|
|
doAssert not compiles(block:
|
|
var b2 {.byaddr.}: float = s[2])
|
|
|
|
doAssert compiles(block:
|
|
var b2 {.byaddr.}: int = s[2])
|
|
|
|
proc fun2() = fun()
|
|
fun()
|
|
fun2()
|
|
static: fun2()
|
|
when false: # pending bug #13887
|
|
static: fun()
|