private KecaknoahAstNode ParseFirstLevel(Queue<KecaknoahToken> tokens)
{
var result = new KecaknoahAstNode();
tokens.SkipLogicalLineBreak();
try
{
while (tokens.Count != 0)
{
var t = tokens.Dequeue();
switch (t.Type)
{
case KecaknoahTokenType.ClassKeyword:
result.AddNode(ParseClass(tokens));
break;
case KecaknoahTokenType.FuncKeyword:
result.AddNode(ParseFunction(tokens, true));
break;
default:
throw new KecaknoahParseException(t.CreateErrorAt("トップレベルにはクラスとメソッド以外は定義できません。"));
}
tokens.SkipLogicalLineBreak();
}
}
catch (KecaknoahParseException)
{
throw;
}
return result;
}
private KecaknoahAstNode ParseFirstLevel(Queue<KecaknoahToken> tokens)
{
var result = new KecaknoahAstNode();
tokens.SkipLogicalLineBreak();
try
{
while (tokens.Count != 0)
{
var t = tokens.Dequeue();
switch (t.Type)
{
case KecaknoahTokenType.UseKeyword:
t = tokens.Dequeue();
if (t.Type != KecaknoahTokenType.StringLiteral) throw new KecaknoahParseException(t.CreateErrorAt("use文には文字列を指定してください。"));
result.AddNode(new KecaknoahUseAstNode { Target = t.TokenString });
break;
case KecaknoahTokenType.ClassKeyword:
result.AddNode(ParseClass(tokens));
break;
case KecaknoahTokenType.FuncKeyword:
result.AddNode(ParseFunction(tokens, true));
break;
default:
throw new KecaknoahParseException(t.CreateErrorAt("トップレベルにはクラスとメソッド、use文以外は定義できません。"));
}
tokens.SkipLogicalLineBreak();
}
}
catch (KecaknoahParseException)
{
throw;
}
return result;
}