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#
#
# The Nim Compiler
# (c) Copyright 2013 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
# included from jsgen.nim
## Type info generation for the JS backend.
proc rope(arg: Int128): Rope = rope($arg)
proc genTypeInfo(p: PProc, typ: PType): Rope
proc genObjectFields(p: PProc, typ: PType, n: PNode): Rope =
var
s, u: Rope
field: PSym
b: PNode
result = ""
case n.kind
of nkRecList:
if n.len == 1:
result = genObjectFields(p, typ, n[0])
else:
s = ""
for i in 0..<n.len:
if i > 0: s.add(", \L")
s.add(genObjectFields(p, typ, n[i]))
result = ("{kind: 2, len: $1, offset: 0, " &
"typ: null, name: null, sons: [$2]}") % [rope(n.len), s]
of nkSym:
field = n.sym
s = genTypeInfo(p, field.typ)
result = ("{kind: 1, offset: \"$1\", len: 0, " &
"typ: $2, name: $3, sons: null}") %
[mangleName(p.module, field), s,
makeJSString(field.name.s)]
of nkRecCase:
if (n[0].kind != nkSym): internalError(p.config, n.info, "genObjectFields")
field = n[0].sym
s = genTypeInfo(p, field.typ)
for i in 1..<n.len:
b = n[i] # branch
u = ""
case b.kind
of nkOfBranch:
if b.len < 2:
internalError(p.config, b.info, "genObjectFields; nkOfBranch broken")
for j in 0..<b.len - 1:
if u != "": u.add(", ")
if b[j].kind == nkRange:
u.addf("[$1, $2]", [rope(getOrdValue(b[j][0])),
rope(getOrdValue(b[j][1]))])
else:
u.add(rope(getOrdValue(b[j])))
of nkElse:
u = rope(lengthOrd(p.config, field.typ))
else: internalError(p.config, n.info, "genObjectFields(nkRecCase)")
if result != "": result.add(", \L")
result.addf("[setConstr($1), $2]",
[u, genObjectFields(p, typ, lastSon(b))])
result = ("{kind: 3, offset: \"$1\", len: $3, " &
"typ: $2, name: $4, sons: [$5]}") % [
mangleName(p.module, field), s,
rope(lengthOrd(p.config, field.typ)), makeJSString(field.name.s), result]
else: internalError(p.config, n.info, "genObjectFields")
proc objHasTypeField(t: PType): bool {.inline.} =
tfInheritable in t.flags or t.baseClass != nil
proc genObjectInfo(p: PProc, typ: PType, name: Rope) =
let kind = if objHasTypeField(typ): tyObject else: tyTuple
var s = ("var $1 = {size: 0, kind: $2, base: null, node: null, " &
"finalizer: null};$n") % [name, rope(ord(kind))]
prepend(p.g.typeInfo, s)
p.g.typeInfo.addf("var NNI$1 = $2;$n",
[rope(typ.id), genObjectFields(p, typ, typ.n)])
p.g.typeInfo.addf("$1.node = NNI$2;$n", [name, rope(typ.id)])
if (typ.kind == tyObject) and (typ.baseClass != nil):
p.g.typeInfo.addf("$1.base = $2;$n",
[name, genTypeInfo(p, typ.baseClass.skipTypes(skipPtrs))])
proc genTupleFields(p: PProc, typ: PType): Rope =
var s: Rope = ""
for i in 0..<typ.len:
if i > 0: s.add(", \L")
s.addf("{kind: 1, offset: \"Field$1\", len: 0, " &
"typ: $2, name: \"Field$1\", sons: null}",
[i.rope, genTypeInfo(p, typ[i])])
result = ("{kind: 2, len: $1, offset: 0, " &
"typ: null, name: null, sons: [$2]}") % [rope(typ.len), s]
proc genTupleInfo(p: PProc, typ: PType, name: Rope) =
var s = ("var $1 = {size: 0, kind: $2, base: null, node: null, " &
"finalizer: null};$n") % [name, rope(ord(typ.kind))]
prepend(p.g.typeInfo, s)
p.g.typeInfo.addf("var NNI$1 = $2;$n",
[rope(typ.id), genTupleFields(p, typ)])
p.g.typeInfo.addf("$1.node = NNI$2;$n", [name, rope(typ.id)])
proc genEnumInfo(p: PProc, typ: PType, name: Rope) =
var s: Rope = ""
for i in 0..<typ.n.len:
if (typ.n[i].kind != nkSym): internalError(p.config, typ.n.info, "genEnumInfo")
let field = typ.n[i].sym
if i > 0: s.add(", \L")
let extName = if field.ast == nil: field.name.s else: field.ast.strVal
s.addf("\"$1\": {kind: 1, offset: $1, typ: $2, name: $3, len: 0, sons: null}",
[rope(field.position), name, makeJSString(extName)])
var n = ("var NNI$1 = {kind: 2, offset: 0, typ: null, " &
"name: null, len: $2, sons: {$3}};$n") % [rope(typ.id), rope(typ.n.len), s]
s = ("var $1 = {size: 0, kind: $2, base: null, node: null, " &
"finalizer: null};$n") % [name, rope(ord(typ.kind))]
prepend(p.g.typeInfo, s)
p.g.typeInfo.add(n)
p.g.typeInfo.addf("$1.node = NNI$2;$n", [name, rope(typ.id)])
if typ.baseClass != nil:
p.g.typeInfo.addf("$1.base = $2;$n",
[name, genTypeInfo(p, typ.baseClass)])
proc genTypeInfo(p: PProc, typ: PType): Rope =
let t = typ.skipTypes({tyGenericInst, tyDistinct, tyAlias, tySink, tyOwned})
result = "NTI$1" % [rope(t.id)]
if containsOrIncl(p.g.typeInfoGenerated, t.id): return
case t.kind
of tyDistinct:
result = genTypeInfo(p, t.skipModifier)
of tyPointer, tyProc, tyBool, tyChar, tyCstring, tyString, tyInt..tyUInt64:
var s =
"var $1 = {size: 0,kind: $2,base: null,node: null,finalizer: null};$n" %
[result, rope(ord(t.kind))]
prepend(p.g.typeInfo, s)
of tyVar, tyLent, tyRef, tyPtr, tySequence, tyRange, tySet, tyOpenArray:
var s =
"var $1 = {size: 0, kind: $2, base: null, node: null, finalizer: null};$n" %
[result, rope(ord(t.kind))]
prepend(p.g.typeInfo, s)
p.g.typeInfo.addf("$1.base = $2;$n",
[result, genTypeInfo(p, t.elementType)])
of tyArray:
var s =
"var $1 = {size: 0, kind: $2, base: null, node: null, finalizer: null};$n" %
[result, rope(ord(t.kind))]
prepend(p.g.typeInfo, s)
p.g.typeInfo.addf("$1.base = $2;$n",
[result, genTypeInfo(p, t.elementType)])
of tyEnum: genEnumInfo(p, t, result)
of tyObject: genObjectInfo(p, t, result)
of tyTuple: genTupleInfo(p, t, result)
of tyStatic:
if t.n != nil: result = genTypeInfo(p, skipModifier t)
else: internalError(p.config, "genTypeInfo(" & $t.kind & ')')
else: internalError(p.config, "genTypeInfo(" & $t.kind & ')')
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