bonkmaykr/otyaSMILEBASIC
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関数呼び出しの実�

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otya128
2015-06-03 21:52:09 +09:00
parent 9ed79ef448
commit 421f90d717
4 changed files with 100 additions and 3 deletions
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61
SMILEBASIC/parser.d
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@@ -23,6 +23,7 @@ class Lexical
table['/'] = TokenType.Div;
table['('] = TokenType.LParen;
table[')'] = TokenType.RParen;
table[','] = TokenType.Comma;
}
bool empty()
{
@@ -56,6 +57,21 @@ class Lexical
token = Token(TokenType.Integer, Value(num));
break;
}
if(c.isAlpha())
{
wstring iden;
for(;i < code.length;i++)
{
c = code[i];
if(!c.isAlpha())
{
break;
}
iden ~= c;
}
token = Token(TokenType.Iden, Value(iden));
break;
}
if(table[cast(char)c] == TokenType.Unknown)
{
//error
@@ -173,6 +189,22 @@ class Parser
}
}
break;
case NodeType.Variable:
return 100;
case NodeType.CallFunction:
{
auto func = cast(CallFunction)exp;
int result = 100;
if(func.name == "ADD")
{
result = 0;
foreach(Expression i ; func.args)
{
result += calc(i);
}
}
return result;
}
default:
return - - -1;
}
@@ -224,6 +256,35 @@ class Parser
version(none)stdout.flush();
node = new Constant(Value(token.value.integerValue));
break;
case TokenType.Iden:
if(!lex.empty())
lex.popFront();
if(lex.front().type == TokenType.LParen)
{
auto func = new CallFunction(token.value.stringValue);
node = func;
//関数呼び出しだった
while(true)
{
lex.popFront();
token = lex.front();
if(token.type == TokenType.Comma)
{
func.addArg(new VoidExpression());
lex.popFront();
token = lex.front();
}
else
func.addArg(expression());
if(lex.front().type == TokenType.RParen) break;
}
}
else
{
return new Variable(token.value.stringValue);
}
break;
case TokenType.LParen:
lex.popFront();
node = expression();