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fix: 调整输出的格式 (#78)

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Reviewed-on: PostGuard/Canon#78
This commit is contained in:
jackfiled 2024-05-10 16:45:21 +08:00
parent f993d49856
commit 1908561d31
5 changed files with 122 additions and 43 deletions
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99
Canon.Core/SemanticParser/CodeGeneratorVisitor.cs
View File

@ -146,6 +146,19 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
Builder.EndScope();
}
public override void PreVisit(Factor factor)
{
base.PreVisit(factor);
factor.OnParethnesisGenerator += (_, e) => { e.Expression.IsCondition = factor.IsCondition; };
factor.OnNotGenerator += (_, e) => { e.Factor.IsCondition = factor.IsCondition; };
factor.OnUminusGenerator += (_, e) => { e.Factor.IsCondition = factor.IsCondition; };
factor.OnPlusGenerator += (_, e) => { e.Factor.IsCondition = factor.IsCondition; };
}
public override void PostVisit(Factor factor)
{
base.PostVisit(factor);
@ -256,7 +269,23 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
return;
}
variable.VariableName = variable.Identifier.IdentifierName;
// 虽然这里这样可能会生成来类似于 &*x 的代码
// 但是可以正常运行
variable.VariableName =
symbol.Reference ? $"*{variable.Identifier.IdentifierName}" : variable.Identifier.IdentifierName;
}
public override void PreVisit(Term term)
{
base.PreVisit(term);
term.OnMultiplyGenerator += (_, e) =>
{
e.Left.IsCondition = term.IsCondition;
e.Right.IsCondition = term.IsCondition;
};
term.OnFactorGenerator += (_, e) => { e.Factor.IsCondition = term.IsCondition; };
}
public override void PostVisit(Term term)
@ -276,6 +305,19 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
};
}
public override void PreVisit(SimpleExpression simpleExpression)
{
base.PreVisit(simpleExpression);
simpleExpression.OnAddGenerator += (_, e) =>
{
e.Left.IsCondition = simpleExpression.IsCondition;
e.Right.IsCondition = simpleExpression.IsCondition;
};
simpleExpression.OnTermGenerator += (_, e) => { e.Term.IsCondition = simpleExpression.IsCondition; };
}
public override void PostVisit(SimpleExpression simpleExpression)
{
base.PostVisit(simpleExpression);
@ -298,6 +340,16 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
{
base.PreVisit(expression);
expression.OnSimpleExpressionGenerator += (_, e) =>
{
e.SimpleExpression.IsCondition = expression.IsCondition;
};
expression.OnRelationGenerator += (_, e) =>
{
e.Left.IsCondition = expression.IsCondition;
e.Right.IsCondition = expression.IsCondition;
};
if (expression.IsWhileCondition)
{
GenerateWhileLabel();
@ -306,6 +358,7 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
""");
}
}
public override void PostVisit(Expression expression)
{
base.PostVisit(expression);
@ -422,7 +475,11 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
{
base.PreVisit(statement);
statement.OnIfGenerator += (_, e) => { e.Condition.IsIfCondition = true; };
statement.OnIfGenerator += (_, e) =>
{
e.Condition.IsIfCondition = true;
e.Condition.IsCondition = true;
};
statement.OnForGenerator += (_, e) =>
{
@ -445,16 +502,6 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
statement.OnAssignGenerator += (_, e) =>
{
if (!SymbolTable.TryGetSymbol(e.Variable.Identifier.IdentifierName, out Symbol? symbol))
{
return;
}
if (symbol.Reference)
{
e.Variable.VariableName = "*" + e.Variable.VariableName;
}
Builder.AddLine($"{e.Variable.VariableName} = {e.Expression.VariableName};");
};
@ -686,7 +733,7 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
if (procedureId == "write" || procedureId == "writeln")
{
string result = $"printf(\"{GenerateFormatString(parameters) + isReturn}\"";
string result = $"printf(\"{GenerateFormatString(parameters, true) + isReturn}\"";
foreach (Expression parameter in parameters)
{
@ -748,7 +795,22 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
{
if (parameterType.IsVar)
{
parameterValue += $", &{parameter.VariableName}";
// 这里需要判断parameter是否也为引用类型
if (SymbolTable.TryGetSymbol(parameter.VariableName, out Symbol? parameterSymboe))
{
if (parameterSymboe.Reference)
{
parameterValue += $", {parameter.VariableName}";
}
else
{
parameterValue += $", &{parameter.VariableName}";
}
}
else
{
parameterValue += $", &{parameter.VariableName}";
}
}
else
{
@ -768,22 +830,23 @@ public class CodeGeneratorVisitor : TypeCheckVisitor
{
if (expression.VariableType == PascalBasicType.Integer)
{
value += "%d ";
value += "%d";
}
if (expression.VariableType == PascalBasicType.Real)
{
// 这里需要按照输出调整
value += output ? "%.6lf " : "%lf ";
// 在输出real的前面需要添加一个空格
value += output ? "%.6lf" : "%lf";
}
if (expression.VariableType == PascalBasicType.Character)
{
value += "%c ";
value += "%c";
}
}
return value.Trim();
return value;
}
private static string GenerateBasicTypeString(PascalType pascalType)

5
Canon.Core/SyntaxNodes/Expression.cs
View File

@ -48,6 +48,11 @@ public class Expression : NonTerminatedSyntaxNode
/// </summary>
public bool IsIfCondition { get; set; }
/// <summary>
/// 是否为条件判断语句
/// </summary>
public bool IsCondition { get; set; }
/// <summary>
/// 是否为WHILE语句中的条件语句
/// </summary>

15
Canon.Core/SyntaxNodes/Factor.cs
View File

@ -50,6 +50,11 @@ public class Factor : NonTerminatedSyntaxNode
{
public override NonTerminatorType Type => NonTerminatorType.Factor;
/// <summary>
/// 是否为条件判断语句
/// </summary>
public bool IsCondition { get; set; }
public override void PreVisit(SyntaxNodeVisitor visitor)
{
visitor.PreVisit(this);
@ -158,10 +163,11 @@ public class Factor : NonTerminatedSyntaxNode
else
{
// factor -> id ( )
OnProcedureCallGenerator?.Invoke(this, new ProcedureCallGeneratorEventArgs
{
ProcedureName = terminatedSyntaxNode.Token.Convert<IdentifierSemanticToken>()
});
OnProcedureCallGenerator?.Invoke(this,
new ProcedureCallGeneratorEventArgs
{
ProcedureName = terminatedSyntaxNode.Token.Convert<IdentifierSemanticToken>()
});
}
}
else if (Children.Count == 4)
@ -177,7 +183,6 @@ public class Factor : NonTerminatedSyntaxNode
}
else
{
SemanticToken token = Children[0].Convert<TerminatedSyntaxNode>().Token;
Factor factor = Children[1].Convert<Factor>();

23
Canon.Core/SyntaxNodes/SimpleExpression.cs
View File

@ -21,6 +21,11 @@ public class SimpleExpression : NonTerminatedSyntaxNode
{
public override NonTerminatorType Type => NonTerminatorType.SimpleExpression;
/// <summary>
/// 是否为条件判断语句
/// </summary>
public bool IsCondition { get; set; }
public override void PreVisit(SyntaxNodeVisitor visitor)
{
visitor.PreVisit(this);
@ -52,19 +57,17 @@ public class SimpleExpression : NonTerminatedSyntaxNode
{
if (Children.Count == 1)
{
OnTermGenerator?.Invoke(this, new TermGeneratorEventArgs
{
Term = Children[0].Convert<Term>()
});
OnTermGenerator?.Invoke(this, new TermGeneratorEventArgs { Term = Children[0].Convert<Term>() });
}
else
{
OnAddGenerator?.Invoke(this, new AddGeneratorEventArgs
{
Left = Children[0].Convert<SimpleExpression>(),
Operator = Children[1].Convert<AddOperator>(),
Right = Children[2].Convert<Term>()
});
OnAddGenerator?.Invoke(this,
new AddGeneratorEventArgs
{
Left = Children[0].Convert<SimpleExpression>(),
Operator = Children[1].Convert<AddOperator>(),
Right = Children[2].Convert<Term>()
});
}
OnTermGenerator = null;

23
Canon.Core/SyntaxNodes/Term.cs
View File

@ -21,6 +21,11 @@ public class Term : NonTerminatedSyntaxNode
{
public override NonTerminatorType Type => NonTerminatorType.Term;
/// <summary>
/// 是否为条件判断语句
/// </summary>
public bool IsCondition { get; set; }
public override void PreVisit(SyntaxNodeVisitor visitor)
{
visitor.PreVisit(this);
@ -52,19 +57,17 @@ public class Term : NonTerminatedSyntaxNode
{
if (Children.Count == 1)
{
OnFactorGenerator?.Invoke(this, new FactorGeneratorEventArgs
{
Factor = Children[0].Convert<Factor>()
});
OnFactorGenerator?.Invoke(this, new FactorGeneratorEventArgs { Factor = Children[0].Convert<Factor>() });
}
else
{
OnMultiplyGenerator?.Invoke(this, new MultiplyGeneratorEventArgs
{
Left = Children[0].Convert<Term>(),
Operator = Children[1].Convert<MultiplyOperator>(),
Right = Children[2].Convert<Factor>()
});
OnMultiplyGenerator?.Invoke(this,
new MultiplyGeneratorEventArgs
{
Left = Children[0].Convert<Term>(),
Operator = Children[1].Convert<MultiplyOperator>(),
Right = Children[2].Convert<Factor>()
});
}
OnFactorGenerator = null;