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[closes #11625 and closes #2488]add global and threadvar(with --threads:off mode ) pragmas supports for JS backend (#15772)

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* add global pragma support for js backend

* globalThis

* add support for threadvar

* more tests

* Update compiler/jsgen.nim

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
This commit is contained in:
flywind 2020-10-30 22:34:07 +08:00 • committed by GitHub
commit 2cfe5e0745
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2 changed files with 36 additions and 1 deletions
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7
compiler/jsgen.nim
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@ -1736,6 +1736,7 @@ proc genVarInit(p: PProc, v: PSym, n: PNode) =
varCode: string
varName = mangleName(p.module, v)
useReloadingGuard = sfGlobal in v.flags and p.config.hcrOn
useGlobalPragmas = sfGlobal in v.flags and ({sfPure, sfThread} * v.flags != {})
if v.constraint.isNil:
if useReloadingGuard:
@ -1743,6 +1744,10 @@ proc genVarInit(p: PProc, v: PSym, n: PNode) =
lineF(p, "if ($1 === undefined) {$n", varName)
varCode = $varName
inc p.extraIndent
elif useGlobalPragmas:
lineF(p, "if (globalThis.$1 === undefined) {$n", varName)
varCode = $varName
inc p.extraIndent
else:
varCode = "var $2"
else:
@ -1795,7 +1800,7 @@ proc genVarInit(p: PProc, v: PSym, n: PNode) =
else:
line(p, runtimeFormat(varCode & " = $3;$n", [returnType, v.loc.r, s]))
if useReloadingGuard:
if useReloadingGuard or useGlobalPragmas:
dec p.extraIndent
lineF(p, "}$n")