|
private Parse ( |
||
| fn | ||
| form | ISeq | |
| retTag | object | |
| return | ||
public static Expr Parse(ParserContext pcon, ISeq form, string name)
{
ISeq origForm = form;
FnExpr fn = new FnExpr(Compiler.TagOf(form));
fn._src = form;
if (((IMeta)form.first()).meta() != null)
{
fn._onceOnly = RT.booleanCast(RT.get(RT.meta(form.first()), KW_ONCE));
}
fn.ComputeNames(form, name);
List <string> prims = new List <string>();
//arglist might be preceded by symbol naming this fn
if (RT.second(form) is Symbol)
{
Symbol nm = (Symbol)RT.second(form);
fn._thisName = nm.Name;
fn._isStatic = false; // RT.booleanCast(RT.get(nm.meta(), Compiler.STATIC_KEY));
form = RT.cons(Compiler.FnSym, RT.next(RT.next(form)));
}
// Normalize body
//now (fn [args] body...) or (fn ([args] body...) ([args2] body2...) ...)
//turn former into latter
if (RT.second(form) is IPersistentVector)
{
form = RT.list(Compiler.FnSym, RT.next(form));
}
fn.SpanMap = (IPersistentMap)Compiler.SourceSpanVar.deref();
GenContext newContext = null;
GenContext context = Compiler.CompilerContextVar.deref() as GenContext ?? Compiler.EvalContext;
newContext = context.WithNewDynInitHelper(fn.InternalName + "__dynInitHelper_" + RT.nextID().ToString());
Var.pushThreadBindings(RT.map(Compiler.CompilerContextVar, newContext));
try
{
try
{
Var.pushThreadBindings(RT.mapUniqueKeys(
Compiler.ConstantsVar, PersistentVector.EMPTY,
Compiler.ConstantIdsVar, new IdentityHashMap(),
Compiler.KeywordsVar, PersistentHashMap.EMPTY,
Compiler.VarsVar, PersistentHashMap.EMPTY,
Compiler.KeywordCallsitesVar, PersistentVector.EMPTY,
Compiler.ProtocolCallsitesVar, PersistentVector.EMPTY,
Compiler.VarCallsitesVar, Compiler.EmptyVarCallSites(),
Compiler.NoRecurVar, null));
SortedDictionary <int, FnMethod> methods = new SortedDictionary <int, FnMethod>();
FnMethod variadicMethod = null;
for (ISeq s = RT.next(form); s != null; s = RT.next(s))
{
FnMethod f = FnMethod.Parse(fn, (ISeq)RT.first(s), fn._isStatic);
if (f.IsVariadic)
{
if (variadicMethod == null)
{
variadicMethod = f;
}
else
{
throw new ParseException("Can't have more than 1 variadic overload");
}
}
else if (!methods.ContainsKey(f.RequiredArity))
{
methods[f.RequiredArity] = f;
}
else
{
throw new ParseException("Can't have 2 overloads with the same arity.");
}
if (f.Prim != null)
{
prims.Add(f.Prim);
}
}
if (variadicMethod != null && methods.Count > 0 && methods.Keys.Max() >= variadicMethod.NumParams)
{
throw new ParseException("Can't have fixed arity methods with more params than the variadic method.");
}
if (fn._isStatic && fn.Closes.count() > 0)
{
throw new ParseException("static fns can't be closures");
}
IPersistentCollection allMethods = null;
foreach (FnMethod method in methods.Values)
{
allMethods = RT.conj(allMethods, method);
}
if (variadicMethod != null)
{
allMethods = RT.conj(allMethods, variadicMethod);
}
fn._methods = allMethods;
fn._variadicMethod = variadicMethod;
fn.Keywords = (IPersistentMap)Compiler.KeywordsVar.deref();
fn.Vars = (IPersistentMap)Compiler.VarsVar.deref();
fn.Constants = (PersistentVector)Compiler.ConstantsVar.deref();
fn.KeywordCallsites = (IPersistentVector)Compiler.KeywordCallsitesVar.deref();
fn.ProtocolCallsites = (IPersistentVector)Compiler.ProtocolCallsitesVar.deref();
fn.VarCallsites = (IPersistentSet)Compiler.VarCallsitesVar.deref();
fn._constantsID = RT.nextID();
}
finally
{
Var.popThreadBindings();
}
IPersistentMap fmeta = RT.meta(origForm);
if (fmeta != null)
{
fmeta = fmeta.without(RT.LineKey).without(RT.ColumnKey).without(RT.SourceSpanKey).without(RT.FileKey);
}
fn._hasMeta = RT.count(fmeta) > 0;
IPersistentVector primTypes = PersistentVector.EMPTY;
foreach (string typename in prims)
{
primTypes = primTypes.cons(Type.GetType(typename));
}
fn.Compile(
fn.IsVariadic ? typeof(RestFn) : typeof(AFunction),
null,
primTypes,
fn._onceOnly,
newContext);
if (fn.SupportsMeta)
{
return(new MetaExpr(fn, MapExpr.Parse(pcon.EvalOrExpr(), fmeta)));
}
else
{
return(fn);
}
}
finally
{
if (newContext != null)
{
Var.popThreadBindings();
}
}
}
public static Expr Parse(object frm, string name)
{
ISeq form = (ISeq)frm;
FnExpr fn = new FnExpr(Compiler.TagOf(form));
if (((IMeta)form.first()).meta() != null)
{
fn._onceOnly = RT.booleanCast(RT.get(RT.meta(form.first()), KW_ONCE));
fn._superName = (string)RT.get(RT.meta(form.first()), KW_SUPER_NAME);
}
fn.ComputeNames(form, name);
try
{
Var.pushThreadBindings(RT.map(
Compiler.CONSTANTS, PersistentVector.EMPTY,
Compiler.KEYWORDS, PersistentHashMap.EMPTY,
Compiler.VARS, PersistentHashMap.EMPTY));
//arglist might be preceded by symbol naming this fn
if (RT.second(form) is Symbol)
{
fn._thisName = ((Symbol)RT.second(form)).Name;
form = RT.cons(Compiler.FN, RT.next(RT.next(form)));
}
// Normalize body
// If it is (fn [arg...] body ...), turn it into
// (fn ([arg...] body...))
// so that we can treat uniformly as (fn ([arg...] body...) ([arg...] body...) ... )
if (RT.second(form) is IPersistentVector)
{
form = RT.list(Compiler.FN, RT.next(form));
}
FnMethod variadicMethod = null;
SortedDictionary <int, FnMethod> methods = new SortedDictionary <int, FnMethod>();
for (ISeq s = RT.next(form); s != null; s = RT.next(s))
{
FnMethod f = FnMethod.Parse(fn, (ISeq)RT.first(s));
if (f.IsVariadic)
{
if (variadicMethod == null)
{
variadicMethod = f;
}
else
{
throw new Exception("Can't have more than 1 variadic overload");
}
}
else if (!methods.ContainsKey(f.RequiredArity))
{
methods[f.RequiredArity] = f;
}
else
{
throw new Exception("Can't have 2 overloads with the same arity.");
}
}
if (variadicMethod != null && methods.Count > 0 && methods.Keys.Max() >= variadicMethod.NumParams)
{
throw new Exception("Can't have fixed arity methods with more params than the variadic method.");
}
IPersistentCollection allMethods = null;
foreach (FnMethod method in methods.Values)
{
allMethods = RT.conj(allMethods, method);
}
if (variadicMethod != null)
{
allMethods = RT.conj(allMethods, variadicMethod);
}
fn._methods = allMethods;
fn._variadicMethod = variadicMethod;
fn._keywords = (IPersistentMap)Compiler.KEYWORDS.deref();
fn._vars = (IPersistentMap)Compiler.VARS.deref();
fn._constants = (PersistentVector)Compiler.CONSTANTS.deref();
fn._constantsID = RT.nextID();
}
finally
{
Var.popThreadBindings();
}
// JAVA: fn.compile();
return(fn);
}
