///
public static NeuOperation Execute(
this NeuInterpreter interpreter,
bool inGlobalScope,
NeuKeyword kindKeyword,
NeuIdentifierPattern idPattern,
NeuInitClause initClause)
{
var id = idPattern.GetIdentifier();
if (id == null)
{
throw new Exception();
}
///
var name = id.Source;
if (IsNullOrWhiteSpace(name))
{
throw new Exception();
}
///
var initializer = initClause.GetInitializer();
if (initializer == null)
{
throw new Exception();
}
///
var initValue = interpreter.Execute(initializer);
///
switch (true)
{
case var _
when
inGlobalScope &&
kindKeyword.KeywordType == NeuKeywordType.Let:
var globalScopedLet = interpreter.CreateVar(name, null, null, null, initValue);
if (globalScopedLet == null)
{
throw new Exception();
}
return(globalScopedLet);
///
case var _
when
inGlobalScope &&
kindKeyword.KeywordType == NeuKeywordType.Var:
var globalScopedVar = interpreter.CreateVar(name, null, null, null, initValue);
if (globalScopedVar == null)
{
throw new Exception();
}
return(globalScopedVar);
///
case var _
when
kindKeyword.KeywordType == NeuKeywordType.Let:
var hoistedLet = interpreter.HoistVar(kindKeyword.KeywordType, name, initValue);
if (hoistedLet == null)
{
throw new Exception();
}
return(hoistedLet);
///
case var _
when
kindKeyword.KeywordType == NeuKeywordType.Var:
var hoistedVar = interpreter.HoistVar(kindKeyword.KeywordType, name, initValue);
if (hoistedVar == null)
{
throw new Exception();
}
return(hoistedVar);
///
default:
throw new Exception();
}
}
public static NeuIdentifier?GetIdentifier(
this NeuIdentifierPattern idPattern)
{
return(idPattern.GetFirstOrDefault <NeuIdentifier>());
}
