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fix:修改对递归函数的procedureCall类型检查，在父符号表中寻找id (#66)

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Reviewed-on: PostGuard/Canon#66
Co-authored-by: ichirinko <1621543655@qq.com>
Co-committed-by: ichirinko <1621543655@qq.com>
This commit is contained in:
ichirinko 2024-04-29 21:33:09 +08:00 committed by jackfiled
parent 03852ed2bf
commit 4d325569fa
3 changed files with 83 additions and 8 deletions
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8
Canon.Core/SemanticParser/PascalType.cs
View File

@ -52,6 +52,11 @@ public abstract class PascalType : IEquatable<PascalType>
throw new InvalidOperationException();
}
if (a == PascalBasicType.Boolean && b == PascalBasicType.Boolean)
{
return PascalBasicType.Boolean;
}
if (a == PascalBasicType.Integer && b == PascalBasicType.Integer)
{
return PascalBasicType.Integer;
@ -69,6 +74,7 @@ public abstract class PascalType : IEquatable<PascalType>
/// <returns>是否为可计算的类型</returns>
public static bool IsCalculatable(PascalType pascalType)
{
return pascalType == PascalBasicType.Integer || pascalType == PascalBasicType.Real;
return pascalType == PascalBasicType.Integer || pascalType == PascalBasicType.Real
|| pascalType == PascalBasicType.Boolean;
}
}

38
Canon.Core/SemanticParser/TypeCheckVisitor.cs
View File

@ -496,20 +496,46 @@ public class TypeCheckVisitor(ILogger<TypeCheckVisitor>? logger = null) : Syntax
public override void PostVisit(ProcedureCall procedureCall)
{
base.PostVisit(procedureCall);
// 查看procedureId是否注册
// 查看当前符号表中procedureId是否注册
if (!SymbolTable.TryGetSymbol(procedureCall.ProcedureId.IdentifierName, out Symbol? procedure))
{
// id没有定义
IsError = true;
logger?.LogError("procedure '{}' is not defined.", procedureCall.ProcedureId.IdentifierName);
logger?.LogError("procedure '{}' is not defined.", procedureCall.ProcedureId.LiteralValue);
return;
}
// 查看该符号是否为procedure
if (procedure.SymbolType is not PascalFunctionType functionType)
{
IsError = true;
logger?.LogError("Identifier '{}' is not a call-able.", procedure.SymbolName);
return;
// id不是函数类型,要找父符号表
if (!SymbolTable.TryGetParent(out SymbolTable? parent))
{
// 没找到父符号表,说明这个id是非函数变量
IsError = true;
logger?.LogError("Identifier '{}' is not a call-able.", procedureCall.ProcedureId.LiteralValue);
return;
}
if (!parent.TryGetSymbol(procedureCall.ProcedureId.IdentifierName, out Symbol? procedureParent))
{
// 找到父符号表但没有找到该id,说明这个id没定义
IsError = true;
logger?.LogError("procedure '{}' is not defined.", procedureCall.ProcedureId.LiteralValue);
return;
}
// 父符号表中找到该id
if (procedureParent.SymbolType is not PascalFunctionType functionTypeParent)
{
// 该符号不是函数类型
IsError = true;
logger?.LogError("Identifier '{}' is not a call-able.", procedureParent.SymbolName);
return;
}
// 该符号是函数类型,赋给procedure
procedure = procedureParent;
functionType = functionTypeParent;
}
procedureCall.OnParameterGenerator += (_, e) =>

45
Canon.Tests/SemanticTests/TypeCheckVisitorTests.cs
View File

@ -426,7 +426,7 @@ public class TypeCheckVisitorTests(ITestOutputHelper testOutputHelper)
end;
begin
findMin(a, b, c,error);
findmin(a, b, c,error);
(* Procedure call *)
end.
""";
@ -436,6 +436,32 @@ public class TypeCheckVisitorTests(ITestOutputHelper testOutputHelper)
}
[Fact]
public void RecursionProcedureCallTest()
{
const string program = """
program main;
var a, b:integer; c:real;
function Test0(var a1:integer; b1:integer; c1:real):integer;
begin
test0(a1,b1,c1+0.5);
end;
function Test1(var a1:integer; b1:integer; c1:real):integer;
begin
test0(1,1,1.0);
end;
begin
teSt1(a,b,1.02);
test(a, b, c);
end.
""";
TypeCheckVisitor visitor = CheckType(program);
Assert.True(visitor.IsError);
}
[Fact]
public void ArrayAssignIndexTest()
{
@ -506,6 +532,23 @@ public class TypeCheckVisitorTests(ITestOutputHelper testOutputHelper)
CheckType(program);
}
[Fact]
public void BooleanOperatorTest()
{
const string program = """
program main;
var flag, tag : boolean;
error:integer;
begin
tag := flag or tag;
flag := flag and error;
end.
""";
TypeCheckVisitor visitor = CheckType(program);
Assert.True(visitor.IsError);
}
private TypeCheckVisitor CheckType(string program)
{
ProgramStruct root = CompilerHelpers.Analyse(program);