fix(llcppsymg):avoid ignore flag process overload

_xtool/llcppsymg/internal/symg/parse.go

@@ -130,12 +130,15 @@ func (p *SymbolProcessor) beRecv(cur clang.Cursor) (ok bool, isPtr bool, typeNam
 
 // sqlite3_finalize -> .Close -> method
 // sqlite3_open -> Open -> function
-func (p *SymbolProcessor) customGoName(mangled string) (goName string, isMethod bool, ok bool) {
+func (p *SymbolProcessor) customGoName(mangled string) (goName string, isMethod bool, isIgnore bool, ok bool) {
 	if customName, ok := p.customSymMap[mangled]; ok {
+		if customName == "-" {
+			return "-", false, true, true
+		}
 		name, found := strings.CutPrefix(customName, ".")
-		return name, found, true
+		return name, found, false, true
 	}
-	return "", false, false
+	return "", false, false, false
 }
 
 func (p *SymbolProcessor) genGoName(cursor clang.Cursor, symbolName string) string {
@@ -148,7 +151,12 @@ func (p *SymbolProcessor) genGoName(cursor clang.Cursor, symbolName string) stri
 		convertedName = name.GoName(originName, p.prefixes, p.inCurPkg(cursor))
 	}
 
-	customGoName, toMethod, isCustom := p.customGoName(symbolName)
+	customGoName, toMethod, isIgnore, isCustom := p.customGoName(symbolName)
+
+	// Early return if symbol should be ignored
+	if isIgnore {
+		return customGoName
+	}
 
 	// 1. for class method,gen method name
 	if parent := cursor.SemanticParent(); parent.Kind == clang.CursorClassDecl {

_xtool/llcppsymg/internal/symg/testdata/c/c.c

@@ -10,6 +10,7 @@ Foo *Foo_ParseWithLength(const char *value, size_t buffer_length) {}
 Foo *Foo_ParseWithSize(const char *value, size_t buffer_length) {}
 
 Foo *Foo_ignoreFunc() {}
+Foo *Foo_ignoreFunc2() {}
 
 // config Foo_ForBar to Bar,so Foo_Bar to Bar__1
 void Foo_Bar() {}

_xtool/llcppsymg/internal/symg/testdata/c/c.h

@@ -17,6 +17,9 @@ Foo *Foo_ParseWithLength(const char *value, size_t buffer_length);
 Foo *Foo_ParseWithSize(const char *value, size_t buffer_length);
 
 Foo *Foo_ignoreFunc();
+// https://github.com/goplus/llcppg/issues/522
+Foo *Foo_ignoreFunc2();
+
 
 // config Foo_ForBar to Bar,so Foo_Bar to Bar__1
 void Foo_Bar();

_xtool/llcppsymg/internal/symg/testdata/c/expect.json

@@ -73,5 +73,10 @@
     "mangle": "Foo_ignoreFunc",
     "c++": "Foo_ignoreFunc()",
     "go": "-"
+  },
+  {
+    "mangle": "Foo_ignoreFunc2",
+    "c++": "Foo_ignoreFunc2()",
+    "go": "-"
   }
 ]

_xtool/llcppsymg/internal/symg/testdata/c/llcppg.cfg

@@ -10,6 +10,7 @@
 		"Foo_Delete":"Delete",
 		"Foo_ParseWithSize":".ParseWithSize",
 		"Foo_ignoreFunc":"-",
+		"Foo_ignoreFunc2":"-",
 		"Foo_ForBar":"Bar",
 		"Foo_Bar2":"Bar2",
 		"Foo_ForBar2":"Bar2",