llcppsigfetch:func pointer

chore/_xtool/llcppsigfetch/parse/cvt.go

@@ -217,8 +217,7 @@ func (ct *Converter) ProcessType(t clang.Type) ast.Expr {
 		expr = &ast.LvalueRefType{X: ct.ProcessType(t.NonReferenceType())}
 	case clang.TypeFunctionProto:
 		// function type will only collect return type, params will be collected in ProcessFuncDecl
-		ret := ct.ProcessType(t.ResultType())
-		expr = &ast.FuncType{Ret: ret}
+		expr = ct.ProcessFunctionType(t)
 	case clang.TypeConstantArray, clang.TypeIncompleteArray, clang.TypeVariableArray, clang.TypeDependentSizedArray:
 		if t.Kind == clang.TypeConstantArray {
 			len := (*c.Char)(c.Malloc(unsafe.Sizeof(c.Char(0)) * 20))
@@ -238,6 +237,30 @@ func (ct *Converter) ProcessType(t clang.Type) ast.Expr {
 	return expr
 }
 
+// For function types, we can only obtain the parameter types, but not the parameter names.
+// This is because we cannot reverse-lookup the corresponding declaration node from a function type.
+// Note: For function declarations, parameter names are collected in the ProcessFuncDecl method.
+func (ct *Converter) ProcessFunctionType(t clang.Type) *ast.FuncType {
+	// Note: Attempting to get the type declaration for a function type will result in CursorNoDeclFound
+	// cursor := t.TypeDeclaration()
+	// This would return CursorNoDeclFound
+
+	ret := ct.ProcessType(t.ResultType())
+	params := &ast.FieldList{List: make([]*ast.Field, 0)}
+	numArgs := t.NumArgTypes()
+	for i := 0; i < int(numArgs); i++ {
+		argType := t.ArgType(c.Uint(i))
+		params.List = append(params.List, &ast.Field{
+			Type: ct.ProcessType(argType),
+		})
+	}
+
+	return &ast.FuncType{
+		Ret:    ret,
+		Params: params,
+	}
+}
+
 func (ct *Converter) ProcessTypeDefDecl(cursor clang.Cursor) *ast.TypedefDecl {
 	name := cursor.String()
 	defer name.Dispose()
@@ -260,7 +283,6 @@ func (ct *Converter) ProcessFuncDecl(cursor clang.Cursor) *ast.FuncDecl {
 		fmt.Println("failed to process function type")
 		return nil
 	}
-
 	params := ct.ProcessFieldList(cursor)
 	funcType.Params = params
 	fn := &ast.FuncDecl{

chore/_xtool/llcppsigfetch/parse/cvt_test/decl_test/struct_test/llgo.expect

@@ -148,6 +148,84 @@ TestStructDecl Case 3:
 	}
 }
 
+TestStructDecl Case 4:
+{
+	"temp.h":	{
+		"decls":	[{
+				"Loc":	{
+					"File":	"temp.h"
+				},
+				"Doc":	{
+					"List":	[]
+				},
+				"Parent":	null,
+				"Name":	{
+					"Name":	"A"
+				},
+				"Type":	{
+					"Tag":	0,
+					"Fields":	{
+						"List":	[{
+								"Type":	{
+									"Kind":	6,
+									"Flags":	0
+								},
+								"Doc":	{
+									"List":	[]
+								},
+								"Comment":	{
+									"List":	[]
+								},
+								"Names":	[{
+										"Name":	"a"
+									}]
+							}, {
+								"Type":	{
+									"X":	{
+										"Params":	{
+											"List":	[{
+													"Type":	{
+														"Kind":	6,
+														"Flags":	0
+													},
+													"Doc":	null,
+													"Comment":	null,
+													"Names":	[]
+												}, {
+													"Type":	{
+														"Kind":	6,
+														"Flags":	0
+													},
+													"Doc":	null,
+													"Comment":	null,
+													"Names":	[]
+												}]
+										},
+										"Ret":	{
+											"Kind":	6,
+											"Flags":	0
+										}
+									}
+								},
+								"Doc":	{
+									"List":	[]
+								},
+								"Comment":	{
+									"List":	[]
+								},
+								"Names":	[{
+										"Name":	"Foo"
+									}]
+							}]
+					},
+					"Methods":	[]
+				}
+			}],
+		"includes":	[],
+		"macros":	[]
+	}
+}
+
 
 #stderr
 

chore/_xtool/llcppsigfetch/parse/cvt_test/decl_test/struct_test/struct.go

@@ -18,6 +18,10 @@ func TestStructDecl() {
 		`struct A {
 			int a, b;
 		};`,
+		`struct A {
+			int a;
+		    int (*Foo)(int, int);
+		};`,
 	}
 	test.RunTest("TestStructDecl", testCases)
 }

chore/_xtool/llcppsigfetch/parse/cvt_test/decl_test/typedef_test/llgo.expect

@@ -61,6 +61,53 @@ TestTypeDefDecl Case 2:
 	}
 }
 
+TestTypeDefDecl Case 3:
+{
+	"temp.h":	{
+		"decls":	[{
+				"Loc":	{
+					"File":	"temp.h"
+				},
+				"Doc":	{
+					"List":	[]
+				},
+				"Parent":	null,
+				"Name":	{
+					"Name":	"Foo"
+				},
+				"Type":	{
+					"X":	{
+						"Params":	{
+							"List":	[{
+									"Type":	{
+										"Kind":	6,
+										"Flags":	0
+									},
+									"Doc":	null,
+									"Comment":	null,
+									"Names":	[]
+								}, {
+									"Type":	{
+										"Kind":	6,
+										"Flags":	0
+									},
+									"Doc":	null,
+									"Comment":	null,
+									"Names":	[]
+								}]
+						},
+						"Ret":	{
+							"Kind":	6,
+							"Flags":	0
+						}
+					}
+				}
+			}],
+		"includes":	[],
+		"macros":	[]
+	}
+}
+
 
 #stderr
 

chore/_xtool/llcppsigfetch/parse/cvt_test/decl_test/typedef_test/typedef.go

@@ -12,6 +12,8 @@ func TestTypeDefDecl() {
 
 		`typedef int INT;
 		 typedef INT STANDARD_INT;`,
+
+		`typedef int (*Foo)(int, int);`,
 	}
 	test.RunTest("TestTypeDefDecl", testCases)
 }

chore/_xtool/llcppsigfetch/parse/cvt_test/type_test/llgo.expect

@@ -169,6 +169,34 @@ Type: class a::b::c:
 	},
 	"Tag":	3
 }
+Type: int (*)(int, char):
+{
+	"X":	{
+		"Params":	{
+			"List":	[{
+					"Type":	{
+						"Kind":	6,
+						"Flags":	0
+					},
+					"Doc":	null,
+					"Comment":	null,
+					"Names":	[]
+				}, {
+					"Type":	{
+						"Kind":	2,
+						"Flags":	1
+					},
+					"Doc":	null,
+					"Comment":	null,
+					"Names":	[]
+				}]
+		},
+		"Ret":	{
+			"Kind":	6,
+			"Flags":	0
+		}
+	}
+}
 
 #stderr
 todo: unknown builtin type: Ibm128

chore/_xtool/llcppsigfetch/parse/cvt_test/type_test/type.go

@@ -111,6 +111,8 @@ func TestNonBuiltinTypes() {
 		 }
 		 }
 		 class a::b::c`,
+
+		`int (*p)(int, char);`,
 	}
 
 	for _, t := range tests {