bonkmaykr/otyaSMILEBASIC
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変数宣言実装中

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otya128
2015-06-11 19:29:34 +09:00
parent 7c383dff1a
commit c050d4e066
4 changed files with 64 additions and 12 deletions
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55
SMILEBASIC/parser.d
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@@ -36,6 +36,8 @@ class Lexical
table['<'] = TokenType.Less;
table['>'] = TokenType.Greater;
table['!'] = TokenType.LogicalNot;
table['['] = TokenType.LBracket;
table[']'] = TokenType.RBracket;
reserved["OR"] = TokenType.Or;
reserved["AND"] = TokenType.And;
reserved["XOR"] = TokenType.Xor;
@@ -534,7 +536,7 @@ class Parser
case TokenType.Var:
lex.popFront();
node = var();
break;
return node;
default:
syntaxError();
break;
@@ -544,30 +546,59 @@ class Parser
}
Statement var()
{
Token token = lex.front();
if(token.type != TokenType.Iden)
Var var = new Var();
Token token;
while(true)
{
//TODO:VAR("A")の実装
syntaxError();
return null;
token = lex.front();
if(token.type != TokenType.Iden)
{
//TODO:VAR("A")の実装
syntaxError();
return null;
}
auto v = defineVar();
var.addDefineVar(cast(DefineVariable)v);
//VARの評価順は順番通り
//VAR iden[=expr],
if(token.type == TokenType.Comma)
{
lex.popFront();
writeln("NOTIMPL");
syntaxError();
}
else
{
break;
}
}
return var;
}
Statement defineVar()
{
Token token = lex.front();
wstring name = token.value.stringValue;
lex.popFront();
token = lex.front();
Expression expr;
//VAR iden[
if(token.type == TokenType.LBracket)
{
lex.popFront();
while(true)
{
expr = expression();
token = lex.front();
}
}
//VAR iden=expr
if(token.type == TokenType.Equal)
{
lex.popFront();
expr = expression();
token = lex.front();
}
DefineVariable node = new DefineVariable(name, expr);
//VARの評価順は順番通り
//VAR iden[=expr],
if(token.type == TokenType.Comma)
{
lex.popFront();
}
return node;
}
For forStatement()