fix(selfhost): generic struct compilation, explicit generic args, method calls, field access

- parser: add parserIsTypeArgListAhead() for Func<Type>(args) and Type<T> { ... }
- hir_lower: method call desugaring with typeName tracking, self keyword,
  ekField typeName propagation, variable type tracking, strip '*' suffix
  from pointer type names in method calls, fix externFuncs buffer overflow
  (64 -> 256 elements) that corrupted structCount
- qbe_backend: QBE_FindStruct, QBE_FieldOffset, QBE_TypeSize helpers;
  hStructInit field-by-field codegen; hFieldPtr with offset + auto-load;
  hAssign/hStore special case for hFieldPtr (generate pointer, not value);
  fix null as *HirNode -> null as *void for extraData comparisons

_selfhost/src/cli.bux

@@ -96,7 +96,6 @@ func Cli_Compile(source: String, sourceName: String) -> String {
     }
     Print("HIR funcCount=");
     PrintInt(hirMod.funcCount);
-    PrintLine("");
 
     // Phase 5: QBE SSA code generation
     let qbeCode: String = QbeBackend_Generate(hirMod);
@@ -344,15 +343,11 @@ func Cli_MergeFileInto(target: *Module, path: String, skipNames: *String, skipCo
     }
     Print("DEBUG: MergeFileInto done, added=");
     PrintInt(added);
-    PrintLine("");
     return added;
 }
 
 func Cli_CopyModuleDecls(target: *Module, source: *Module) {
     if source == null as *Module || source.firstItem == null as *Decl { return; }
-    Print("DEBUG: copy start, source.itemCount=");
-    PrintInt(source.itemCount);
-    PrintLine("");
     var decl: *Decl = source.firstItem;
     var limit: int = 0;
     while decl != null as *Decl && limit < 10000 {
@@ -365,7 +360,6 @@ func Cli_CopyModuleDecls(target: *Module, source: *Module) {
     }
     source.firstItem = null as *Decl;
     source.itemCount = 0;
-    PrintLine("DEBUG: copy end");
 }
 
 func Cli_BuildProject(projectDir: String) -> int {
@@ -457,7 +451,6 @@ func Cli_BuildProject(projectDir: String) -> int {
 
     Print("DEBUG: userMerged.itemCount=");
     PrintInt(userMerged.itemCount);
-    PrintLine("");
 
     // Collect user declaration names for shadow detection
     let maxNames: int = 2048;
@@ -482,7 +475,6 @@ func Cli_BuildProject(projectDir: String) -> int {
             let stdFiles: *String = bux_list_dir(stdSubdir, ".bux", &stdFileCount);
             Print("DEBUG: stdFileCount=");
             PrintInt(stdFileCount);
-            PrintLine("");
             if stdFileCount > 0 {
                 Print("Merging ");
                 PrintInt(stdFileCount);
@@ -492,7 +484,6 @@ func Cli_BuildProject(projectDir: String) -> int {
                 while si < stdFileCount {
                     Print("DEBUG: merging stdlib file ");
                     PrintInt(si);
-                    PrintLine("");
                     // Skip Channel.bux for debugging
                     if String_Eq(stdFiles[si], "./../stdlib/Std/Channel.bux") {
                         PrintLine("DEBUG: skipping Channel.bux");
@@ -505,7 +496,6 @@ func Cli_BuildProject(projectDir: String) -> int {
                 }
                 Print("Stdlib declarations added: ");
                 PrintInt(stdAdded);
-                PrintLine("");
             }
         }
     }
@@ -520,23 +510,29 @@ func Cli_BuildProject(projectDir: String) -> int {
     }
     Print("userMerged actual count=");
     PrintInt(countTest);
-    PrintLine("");
     Print("userMerged.itemCount=");
     PrintInt(userMerged.itemCount);
-    PrintLine("");
     var du: *Decl = userMerged.firstItem;
     while du != null as *Decl {
         if du.kind == dkFunc {
             Print("user func ");
             PrintLine(du.strValue);
         }
+        if du.kind == dkStruct {
+            Print("user struct ");
+            Print(du.strValue);
+            PrintInt(du.fieldCount);
+        }
+        if du.kind == dkImpl {
+            Print("user impl ");
+            PrintLine(du.strValue);
+        }
         du = du.childDecl2;
     }
     Cli_CopyModuleDecls(merged, userMerged);
     PrintLine("DEBUG: copy done");
     Print("merged.itemCount=");
     PrintInt(merged.itemCount);
-    PrintLine("");
     PrintLine("DEBUG: copy done");
 
     Print("Merged ");
@@ -679,12 +675,10 @@ func Cli_RunProject(projectDir: String) -> int {
 func Cli_Run(args: *String, argCount: int) -> int {
     Print("Cli_Run argCount=");
     PrintInt(argCount);
-    PrintLine("");
     if argCount < 2 {
         PrintLine("Bux Self-Hosting Compiler v0.2.0");
         PrintLine("Usage: buxc <command> [args]");
         PrintLine("Commands: build, check, run, version");
-        PrintLine("");
         PrintLine("Pipeline modules:");
         PrintLine("  Lexer      ✅  695 lines");
         PrintLine("  Parser     ✅ 1004 lines");

_selfhost/src/hir_lower.bux

@@ -105,6 +105,24 @@ func Lcx_LowerExpr(ctx: *LowerCtx, expr: *Expr) -> *HirNode {
         n.strValue = expr.strValue;
         let sym: Symbol = Scope_Lookup(ctx.scope, expr.strValue);
         n.typeKind = sym.typeKind;
+        if expr.refType != null as *TypeExpr {
+            n.typeName = expr.refType.typeName;
+        }
+        if sym.typeName != null as String && !String_Eq(sym.typeName, "") {
+            n.typeName = sym.typeName;
+        }
+        return n;
+    }
+
+    // self → variable reference named "self"
+    if kind == ekSelf {
+        n.kind = hVar;
+        n.strValue = "self";
+        let sym: Symbol = Scope_Lookup(ctx.scope, "self");
+        n.typeKind = sym.typeKind;
+        if sym.typeName != null as String && !String_Eq(sym.typeName, "") {
+            n.typeName = sym.typeName;
+        }
         return n;
     }
 
@@ -135,6 +153,41 @@ func Lcx_LowerExpr(ctx: *LowerCtx, expr: *Expr) -> *HirNode {
     // Call
     if kind == ekCall {
         n.kind = hCall;
+        // Method call desugaring: obj.method(args) → Type_method(obj, args)
+        if expr.child1 != null as *Expr && expr.child1.kind == ekField {
+            let methodName: String = expr.child1.strValue;
+            var receiverTypeName: String = "";
+            if expr.child1.child1 != null as *Expr && expr.child1.child1.kind == ekIdent {
+                let sym: Symbol = Scope_Lookup(ctx.scope, expr.child1.child1.strValue);
+                receiverTypeName = sym.typeName;
+            }
+            if String_Eq(receiverTypeName, "") && expr.child1.child1 != null as *Expr && expr.child1.child1.refType != null as *TypeExpr {
+                receiverTypeName = expr.child1.child1.refType.typeName;
+            }
+            if !String_Eq(receiverTypeName, "") {
+                // Strip trailing '*' from pointer type names (e.g. "Box*" → "Box")
+                var baseName: String = receiverTypeName;
+                let len: int = bux_strlen(baseName) as int;
+                if len > 0 {
+                    let lastChar: String = bux_str_slice(baseName, (len - 1) as uint, 1);
+                    if String_Eq(lastChar, "*") {
+                        baseName = bux_str_slice(baseName, 0, (len - 1) as uint);
+                    }
+                }
+                n.strValue = String_Concat(baseName, "_");
+                n.strValue = String_Concat(n.strValue, methodName);
+            }
+            // Lower receiver as first argument
+            let recv: *HirNode = Lcx_LowerExpr(ctx, expr.child1.child1);
+            n.child1 = recv;
+            // Lower remaining arguments
+            if expr.child2 != null as *Expr {
+                let extra: *HirNode = Lcx_LowerExpr(ctx, expr.child2);
+                // Chain extra args after receiver via child2/child3
+                n.child2 = extra;
+            }
+            return n;
+        }
         // Get callee name
         if expr.child1 != null as *Expr && expr.child1.kind == ekIdent {
             n.strValue = expr.child1.strValue;
@@ -163,6 +216,10 @@ func Lcx_LowerExpr(ctx: *LowerCtx, expr: *Expr) -> *HirNode {
         n.kind = hFieldPtr;
         n.child1 = Lcx_LowerExpr(ctx, expr.child1);
         n.strValue = expr.strValue;
+        // Get struct type from base expr refType
+        if expr.child1 != null as *Expr && expr.child1.refType != null as *TypeExpr {
+            n.typeName = expr.child1.refType.typeName;
+        }
         return n;
     }
 
@@ -286,6 +343,13 @@ func Lcx_LowerStmt(ctx: *LowerCtx, stmt: *Stmt) -> *HirNode {
                 alloca.typeName = stmt.refStmtType.typeName;
             }
         }
+        // Add to scope for field offset lookups
+        var sym: Symbol;
+        sym.kind = skVar;
+        sym.name = stmt.strValue;
+        sym.typeKind = alloca.typeKind;
+        sym.typeName = alloca.typeName;
+        discard Scope_Define(ctx.scope, sym);
         // store the init value
         n.kind = hStore;
         n.child1 = alloca;
@@ -430,6 +494,27 @@ func Lcx_LowerFunc(ctx: *LowerCtx, decl: *Decl) -> *HirFunc {
         f.retTypeKind = 0;
     }
 
+    // Add parameters to hir_lower scope for field offset lookups
+    var pi: int = 0;
+    while pi < decl.paramCount {
+        var p: *Param = null as *Param;
+        if pi == 0 { p = &decl.param0; }
+        else if pi == 1 { p = &decl.param1; }
+        else if pi == 2 { p = &decl.param2; }
+        else if pi == 3 { p = &decl.param3; }
+        else if pi == 4 { p = &decl.param4; }
+        else if pi == 5 { p = &decl.param5; }
+        if p != null as *Param && p.refParamType != null as *TypeExpr {
+            var sym: Symbol;
+            sym.kind = skVar;
+            sym.name = p.name;
+            sym.typeKind = Lcx_ResolveTypeKind(p.refParamType);
+            sym.typeName = p.refParamType.typeName;
+            discard Scope_Define(ctx.scope, sym);
+        }
+        pi = pi + 1;
+    }
+
     if decl.refBody != null as *Block {
         f.body = Lcx_LowerBlock(ctx, decl.refBody, -1);
     } else {
@@ -449,7 +534,7 @@ func HirLower_LowerModule(mod: *Module, sema: *Sema) -> *HirModule {
     ctx.scope = sema.scope;
     ctx.funcs = bux_alloc(256 as uint * sizeof(HirFunc)) as *HirFunc;
     ctx.funcCount = 0;
-    ctx.externFuncs = bux_alloc(64 as uint * sizeof(HirFunc)) as *HirFunc;
+    ctx.externFuncs = bux_alloc(256 as uint * sizeof(HirFunc)) as *HirFunc;
     ctx.externCount = 0;
     ctx.varCounter = 0;
 
@@ -473,6 +558,20 @@ func HirLower_LowerModule(mod: *Module, sema: *Sema) -> *HirModule {
             ctx.funcs[ctx.funcCount] = *f;
             ctx.funcCount = ctx.funcCount + 1;
         }
+        if decl.kind == dkImpl {
+            let implTypeName: String = decl.strValue;
+            var implDecl: *Decl = decl.childDecl1;
+            while implDecl != null as *Decl {
+                if implDecl.kind == dkFunc {
+                    let mangled: String = String_Concat(implTypeName, "_");
+                    implDecl.strValue = String_Concat(mangled, implDecl.strValue);
+                    let f: *HirFunc = Lcx_LowerFunc(ctx, implDecl);
+                    ctx.funcs[ctx.funcCount] = *f;
+                    ctx.funcCount = ctx.funcCount + 1;
+                }
+                implDecl = implDecl.childDecl2;
+            }
+        }
         if decl.kind == dkExternFunc {
             let f: *HirFunc = Lcx_LowerFunc(ctx, decl);
             ctx.externFuncs[ctx.externCount] = *f;
@@ -534,11 +633,13 @@ func HirLower_LowerModule(mod: *Module, sema: *Sema) -> *HirModule {
         decl = decl.childDecl2;
     }
 
+
     hm.funcCount = ctx.funcCount;
     hm.funcs = ctx.funcs;
     hm.externCount = ctx.externCount;
     hm.externFuncs = ctx.externFuncs;
 
+
     return hm;
 }
 

_selfhost/src/parser.bux

@@ -44,6 +44,29 @@ func parserPeek(p: *Parser, ahead: int) -> int {
     return tkEndOfFile;
 }
 
+// Lookahead to determine if '<' starts a type argument list.
+func parserIsTypeArgListAhead(p: *Parser) -> bool {
+    if !parserCheck(p, tkLt) { return false; }
+    var depth: int = 0;
+    var ahead: int = 0;
+    while true {
+        let kind: int = parserPeek(p, ahead);
+        if kind == tkEndOfFile || kind == tkLBrace || kind == tkSemicolon {
+            return false;
+        }
+        if kind == tkLt {
+            depth = depth + 1;
+        } else if kind == tkGt {
+            depth = depth - 1;
+            if depth == 0 {
+                return true;
+            }
+        }
+        ahead = ahead + 1;
+    }
+    return false;
+}
+
 func parserAdvance(p: *Parser) -> LexToken {
     let tok: LexToken = parserCurToken(p);
     if p.pos < p.tokenCount {
@@ -331,6 +354,25 @@ func parserParsePostfix(p: *Parser) -> *Expr {
             continue;
         }
 
+        // Generic call: Func<Type>(args)  or  Type<T> { ... }
+        if kind == tkLt {
+            if left.kind == ekIdent && parserIsTypeArgListAhead(p) {
+                discard parserAdvance(p); // <
+                let ta0: LexToken = parserExpect(p, tkIdent, "expected type argument");
+                left.genericCallee = left.strValue;
+                left.genericTypeArg0 = ta0.text;
+                left.genericTypeArgCount = 1;
+                if parserMatch(p, tkComma) {
+                    let ta1: LexToken = parserExpect(p, tkIdent, "expected type argument");
+                    left.genericTypeArg1 = ta1.text;
+                    left.genericTypeArgCount = 2;
+                }
+                discard parserExpect(p, tkGt, "expected '>' to close type arguments");
+                // After generic args, continue loop to handle call or struct init
+                continue;
+            }
+        }
+
         // Index: expr[expr]
         if kind == tkLBracket {
             discard parserAdvance(p);
@@ -1285,7 +1327,7 @@ func parserParseDecl(p: *Parser) -> *Decl {
                 if d.methodCount == 0 {
                     d.childDecl1 = m;
                 } else if d.methodCount == 1 {
-                    d.childDecl2 = m;
+                    d.childDecl1.childDecl2 = m;
                 }
                 d.methodCount = d.methodCount + 1;
             } else {

_selfhost/src/qbe_backend.bux

@@ -266,7 +266,7 @@ func QBE_IsTerminator(node: *HirNode) -> bool {
     if node.kind == hBreak { return true; }
     if node.kind == hContinue { return true; }
     if node.kind == hIf {
-        if node.extraData != null as *HirNode {
+        if node.extraData != null as *void {
             return QBE_IsTerminator(node.child2) && QBE_IsTerminator(node.extraData as *HirNode);
         }
         return false;
@@ -307,6 +307,74 @@ func QBE_FindFunc(qbe: *QbeEmitter, name: String) -> *HirFunc {
     return null as *HirFunc;
 }
 
+// ---------------------------------------------------------------------------
+// Helper: find struct by name in module
+// ---------------------------------------------------------------------------
+
+func QBE_FindStruct(qbe: *QbeEmitter, name: String) -> *HirStruct {
+    if qbe.mod == null as *HirModule || name == null as String { return null as *HirStruct; }
+    var i: int = 0;
+    while i < qbe.mod.structCount {
+        if String_Eq(qbe.mod.structs[i].name, name) {
+            return &qbe.mod.structs[i];
+        }
+        i = i + 1;
+    }
+    return null as *HirStruct;
+}
+
+// ---------------------------------------------------------------------------
+// Helper: compute field offset in a struct
+// ---------------------------------------------------------------------------
+
+func QBE_FieldOffset(qbe: *QbeEmitter, structName: String, fieldName: String) -> int {
+    let st: *HirStruct = QBE_FindStruct(qbe, structName);
+    if st == null as *HirStruct { return 0; }
+    var off: int = 0;
+    var fi: int = 0;
+    while fi < st.fieldCount {
+        if String_Eq(st.fields[fi].name, fieldName) {
+            return off;
+        }
+        let ftype: String = st.fields[fi].typeName;
+        var fsz: int = 8;
+        if String_Eq(ftype, "int8") || String_Eq(ftype, "uint8") || String_Eq(ftype, "bool8") || String_Eq(ftype, "char8") { fsz = 1; }
+        else if String_Eq(ftype, "int16") || String_Eq(ftype, "uint16") || String_Eq(ftype, "bool16") || String_Eq(ftype, "char16") { fsz = 2; }
+        else if String_Eq(ftype, "int32") || String_Eq(ftype, "uint32") || String_Eq(ftype, "bool32") || String_Eq(ftype, "char32") || String_Eq(ftype, "float32") { fsz = 4; }
+        off = off + fsz;
+        fi = fi + 1;
+    }
+    return 0;
+}
+
+// ---------------------------------------------------------------------------
+// Helper: type size in bytes
+// ---------------------------------------------------------------------------
+
+func QBE_TypeSize(qbe: *QbeEmitter, kind: int, typeName: String) -> int {
+    if kind == tyNamed && typeName != null as String && !String_Eq(typeName, "") {
+        let st: *HirStruct = QBE_FindStruct(qbe, typeName);
+        if st != null as *HirStruct && st.fields != null as *HirStructField {
+            var sz: int = 0;
+            var fi: int = 0;
+            while fi < st.fieldCount {
+                let ftype: String = st.fields[fi].typeName;
+                var fsz: int = 8;
+                if String_Eq(ftype, "int8") || String_Eq(ftype, "uint8") || String_Eq(ftype, "bool8") || String_Eq(ftype, "char8") { fsz = 1; }
+                else if String_Eq(ftype, "int16") || String_Eq(ftype, "uint16") || String_Eq(ftype, "bool16") || String_Eq(ftype, "char16") { fsz = 2; }
+                else if String_Eq(ftype, "int32") || String_Eq(ftype, "uint32") || String_Eq(ftype, "bool32") || String_Eq(ftype, "char32") || String_Eq(ftype, "float32") { fsz = 4; }
+                sz = sz + fsz;
+                fi = fi + 1;
+            }
+            return sz;
+        }
+    }
+    if kind == tyBool8 || kind == tyChar8 || kind == tyInt8 || kind == tyUInt8 { return 1; }
+    if kind == tyBool16 || kind == tyChar16 || kind == tyInt16 || kind == tyUInt16 { return 2; }
+    if kind == tyBool32 || kind == tyChar32 || kind == tyInt32 || kind == tyUInt32 || kind == tyFloat32 { return 4; }
+    return 8;
+}
+
 // ---------------------------------------------------------------------------
 // Helper: determine QBE type for any HIR node
 // ---------------------------------------------------------------------------
@@ -411,6 +479,23 @@ func QBE_EmitExpr(qbe: *QbeEmitter, node: *HirNode) -> String {
         var target: String = "";
         if node.child1 != null as *HirNode && node.child1.kind == hVar {
             target = QBE_LocalName(node.child1.strValue);
+        } else if node.child1 != null as *HirNode && node.child1.kind == hFieldPtr {
+            // Field assignment: generate pointer, not auto-load value
+            let base: String = QBE_EmitExpr(qbe, node.child1.child1);
+            let ptrTmp: String = QBE_FreshTemp(qbe);
+            var structName: String = node.child1.typeName;
+            if structName == null as String || String_Eq(structName, "") {
+                structName = node.child1.child1.typeName;
+            }
+            let offset: int = QBE_FieldOffset(qbe, structName, node.child1.strValue);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, ptrTmp);
+            QBE_Emit(qbe, " =l add ");
+            QBE_Emit(qbe, QBE_EnsureLocal(base));
+            QBE_Emit(qbe, ", ");
+            QBE_Emit(qbe, String_FromInt(offset as int64));
+            QBE_EmitLine(qbe, "");
+            target = ptrTmp;
         } else {
             target = QBE_EmitExpr(qbe, node.child1);
             if String_Eq(target, "") { return "0"; }
@@ -659,18 +744,84 @@ func QBE_EmitExpr(qbe: *QbeEmitter, node: *HirNode) -> String {
         return tmp;
     }
 
-    // Field pointer: &obj.field
+    // Field pointer: &obj.field  (with auto-load for rvalue contexts)
     if kind == hFieldPtr {
         let base: String = QBE_EmitExpr(qbe, node.child1);
-        let tmp: String = QBE_FreshTemp(qbe);
+        let ptrTmp: String = QBE_FreshTemp(qbe);
-        // add base, offset — need to know offset; for now assume 0 for first field
+        var structName: String = node.typeName;
+        if structName == null as String || String_Eq(structName, "") {
+            structName = node.child1.typeName;
+        }
+        let offset: int = QBE_FieldOffset(qbe, structName, node.strValue);
         QBE_EmitIndent(qbe);
-        QBE_Emit(qbe, tmp);
+        QBE_Emit(qbe, ptrTmp);
         QBE_Emit(qbe, " =l add ");
         QBE_Emit(qbe, QBE_EnsureLocal(base));
-        QBE_Emit(qbe, ", 0");
+        QBE_Emit(qbe, ", ");
+        QBE_Emit(qbe, String_FromInt(offset as int64));
         QBE_EmitLine(qbe, "");
-        return tmp;
+        // Auto-load value from field address (rvalue context)
+        let valTmp: String = QBE_FreshTemp(qbe);
+        let fty: String = QbeBackend_TypeWord(node.typeKind);
+        QBE_EmitIndent(qbe);
+        QBE_Emit(qbe, valTmp);
+        QBE_Emit(qbe, " =");
+        QBE_Emit(qbe, fty);
+        QBE_Emit(qbe, " load");
+        QBE_Emit(qbe, fty);
+        QBE_Emit(qbe, " ");
+        QBE_Emit(qbe, QBE_EnsureLocal(ptrTmp));
+        QBE_EmitLine(qbe, "");
+        return valTmp;
+    }
+
+    // Struct init: allocate and fill fields
+    if kind == hStructInit {
+        let st: *HirStruct = QBE_FindStruct(qbe, node.strValue);
+        var structSize: int = 0;
+        if st != null as *HirStruct {
+            var si: int = 0;
+            while si < st.fieldCount {
+                let ftype: String = st.fields[si].typeName;
+                var fsz: int = 8;
+                if String_Eq(ftype, "int8") || String_Eq(ftype, "uint8") || String_Eq(ftype, "bool8") || String_Eq(ftype, "char8") { fsz = 1; }
+                else if String_Eq(ftype, "int16") || String_Eq(ftype, "uint16") || String_Eq(ftype, "bool16") || String_Eq(ftype, "char16") { fsz = 2; }
+                else if String_Eq(ftype, "int32") || String_Eq(ftype, "uint32") || String_Eq(ftype, "bool32") || String_Eq(ftype, "char32") || String_Eq(ftype, "float32") { fsz = 4; }
+                structSize = structSize + fsz;
+                si = si + 1;
+            }
+        }
+        let ptr: String = QBE_FreshTemp(qbe);
+        QBE_EmitIndent(qbe);
+        QBE_Emit(qbe, ptr);
+        QBE_Emit(qbe, " =l alloc4 ");
+        let szStr: String = String_FromInt(structSize as int64);
+        QBE_Emit(qbe, szStr);
+        QBE_EmitLine(qbe, "");
+        // Store each field
+        var field: *HirNode = node.child1;
+        while field != null as *HirNode {
+            let fval: String = QBE_EmitExpr(qbe, field.child1);
+            let foff: int = QBE_FieldOffset(qbe, node.strValue, field.strValue);
+            let fptr: String = QBE_FreshTemp(qbe);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, fptr);
+            QBE_Emit(qbe, " =l add ");
+            QBE_Emit(qbe, QBE_EnsureLocal(ptr));
+            QBE_Emit(qbe, ", ");
+            QBE_Emit(qbe, String_FromInt(foff as int64));
+            QBE_EmitLine(qbe, "");
+            let fty: String = QbeBackend_TypeWord(field.child1.typeKind);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, "store");
+            QBE_Emit(qbe, fty);
+            QBE_Emit(qbe, " ");
+            QBE_Emit(qbe, QBE_EnsureLocal(fval));
+            QBE_Emit(qbe, ", ");
+            QBE_EmitLine(qbe, QBE_EnsureLocal(fptr));
+            field = field.child3;
+        }
+        return ptr;
     }
 
     // Index pointer: &arr[idx]  (for pointer indexing)
@@ -744,6 +895,34 @@ func QBE_EmitStmt(qbe: *QbeEmitter, node: *HirNode) {
             }
             return;
         }
+        // Field assignment: target is hFieldPtr, need pointer not value
+        if node.child1 != null as *HirNode && node.child1.kind == hFieldPtr {
+            let base: String = QBE_EmitExpr(qbe, node.child1.child1);
+            let ptrTmp: String = QBE_FreshTemp(qbe);
+            var structName: String = node.child1.typeName;
+            if structName == null as String || String_Eq(structName, "") {
+                structName = node.child1.child1.typeName;
+            }
+            let offset: int = QBE_FieldOffset(qbe, structName, node.child1.strValue);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, ptrTmp);
+            QBE_Emit(qbe, " =l add ");
+            QBE_Emit(qbe, QBE_EnsureLocal(base));
+            QBE_Emit(qbe, ", ");
+            QBE_Emit(qbe, String_FromInt(offset as int64));
+            QBE_EmitLine(qbe, "");
+            let val: String = QBE_EmitExpr(qbe, node.child2);
+            let ty: String = QBE_NodeType(qbe, node.child2);
+            if String_Eq(val, "") { val = "0"; }
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, "store");
+            QBE_Emit(qbe, ty);
+            QBE_Emit(qbe, " ");
+            QBE_Emit(qbe, QBE_EnsureLocal(val));
+            QBE_Emit(qbe, ", ");
+            QBE_EmitLine(qbe, QBE_EnsureLocal(ptrTmp));
+            return;
+        }
         // Plain assignment
         let target: String = QBE_EmitExpr(qbe, node.child1);
         let val: String = QBE_EmitExpr(qbe, node.child2);
@@ -786,7 +965,7 @@ func QBE_EmitStmt(qbe: *QbeEmitter, node: *HirNode) {
         QBE_Emit(qbe, ", ");
         QBE_Emit(qbe, lThen);
         QBE_Emit(qbe, ", ");
-        var hasElse: bool = node.extraData != null as *HirNode;
+        var hasElse: bool = node.extraData != null as *void;
         if hasElse {
             QBE_EmitLine(qbe, lElse);
         } else {

_selfhost/src/sema.bux

@@ -2,6 +2,8 @@
 // Validates types, resolves identifiers, checks function calls.
 module Sema {
 
+
+
 // ---------------------------------------------------------------------------
 // Sema context
 // ---------------------------------------------------------------------------
@@ -130,6 +132,12 @@ func Sema_CheckExpr(sema: *Sema, expr: *Expr) -> int {
             Sema_EmitError(sema, expr.line, expr.column, "undeclared identifier");
             return tyUnknown;
         }
+        if sym.typeName != null as String && !String_Eq(sym.typeName, "") {
+            let te: *TypeExpr = bux_alloc(sizeof(TypeExpr)) as *TypeExpr;
+            te.kind = tekNamed;
+            te.typeName = sym.typeName;
+            expr.refType = te;
+        }
         return sym.typeKind;
     }
 
@@ -212,6 +220,10 @@ func Sema_CheckStmt(sema: *Sema, stmt: *Stmt) {
         sym.kind = skVar;
         sym.name = stmt.strValue;
         sym.typeKind = initType;
+        sym.typeName = "";
+        if stmt.refStmtType != null as *TypeExpr {
+            sym.typeName = stmt.refStmtType.typeName;
+        }
         sym.isMutable = stmt.boolValue;
         sym.isPublic = false;
         discard Scope_Define(sema.scope, sym);
@@ -350,9 +362,22 @@ func Sema_Analyze(mod: *Module) -> *Sema {
             // Add parameters to scope
             var i: int = 0;
             while i < decl.paramCount {
+                var p: *Param = null as *Param;
+                if i == 0 { p = &decl.param0; }
+                else if i == 1 { p = &decl.param1; }
+                else if i == 2 { p = &decl.param2; }
+                else if i == 3 { p = &decl.param3; }
+                else if i == 4 { p = &decl.param4; }
+                else if i == 5 { p = &decl.param5; }
                 var pSym: Symbol;
                 pSym.kind = skVar;
-                pSym.typeKind = tyInt; // simplified
+                if p != null as *Param && p.refParamType != null as *TypeExpr {
+                    pSym.typeKind = Sema_ResolveType(s, p.refParamType);
+                    pSym.typeName = p.refParamType.typeName;
+                } else {
+                    pSym.typeKind = tyInt;
+                    pSym.typeName = "";
+                }
                 pSym.isMutable = false;
                 if i == 0 { pSym.name = decl.param0.name; }
                 else if i == 1 { pSym.name = decl.param1.name; }

demo_app/bux.toml

@@ -0,0 +1,7 @@
+[Package]
+Name    = "demo_app"
+Version = "0.1.0"
+Type    = "bin"
+
+[Build]
+Output = "Bin"

demo_app/src/Main.bux

@@ -0,0 +1,29 @@
+// Structs - Basic struct usage
+import Std::Io::{PrintLine, PrintInt};
+
+
+struct Point {
+    x: int;
+    y: int;
+}
+
+func AddPoints(a: Point, b: Point) -> Point {
+    let result: Point = Point { x: a.x + b.x, y: a.y + b.y };
+    return result;
+}
+
+func Main() -> int {
+    let p1: Point = Point { x: 10, y: 20 };
+    let p2: Point = Point { x: 5, y: 15 };
+    let sum: Point = AddPoints(p1, p2);
+    
+    PrintLine("Point sum:");
+    PrintLine("x = ");
+    PrintInt(sum.x);
+    PrintLine("");
+    PrintLine("y = ");
+    PrintInt(sum.y);
+    PrintLine("");
+    
+    return 0;
+}

src_bux/cli.bux

@@ -96,7 +96,6 @@ func Cli_Compile(source: String, sourceName: String) -> String {
     }
     Print("HIR funcCount=");
     PrintInt(hirMod.funcCount);
-    PrintLine("");
 
     // Phase 5: QBE SSA code generation
     let qbeCode: String = QbeBackend_Generate(hirMod);
@@ -344,15 +343,11 @@ func Cli_MergeFileInto(target: *Module, path: String, skipNames: *String, skipCo
     }
     Print("DEBUG: MergeFileInto done, added=");
     PrintInt(added);
-    PrintLine("");
     return added;
 }
 
 func Cli_CopyModuleDecls(target: *Module, source: *Module) {
     if source == null as *Module || source.firstItem == null as *Decl { return; }
-    Print("DEBUG: copy start, source.itemCount=");
-    PrintInt(source.itemCount);
-    PrintLine("");
     var decl: *Decl = source.firstItem;
     var limit: int = 0;
     while decl != null as *Decl && limit < 10000 {
@@ -365,7 +360,6 @@ func Cli_CopyModuleDecls(target: *Module, source: *Module) {
     }
     source.firstItem = null as *Decl;
     source.itemCount = 0;
-    PrintLine("DEBUG: copy end");
 }
 
 func Cli_BuildProject(projectDir: String) -> int {
@@ -457,7 +451,6 @@ func Cli_BuildProject(projectDir: String) -> int {
 
     Print("DEBUG: userMerged.itemCount=");
     PrintInt(userMerged.itemCount);
-    PrintLine("");
 
     // Collect user declaration names for shadow detection
     let maxNames: int = 2048;
@@ -482,7 +475,6 @@ func Cli_BuildProject(projectDir: String) -> int {
             let stdFiles: *String = bux_list_dir(stdSubdir, ".bux", &stdFileCount);
             Print("DEBUG: stdFileCount=");
             PrintInt(stdFileCount);
-            PrintLine("");
             if stdFileCount > 0 {
                 Print("Merging ");
                 PrintInt(stdFileCount);
@@ -492,7 +484,6 @@ func Cli_BuildProject(projectDir: String) -> int {
                 while si < stdFileCount {
                     Print("DEBUG: merging stdlib file ");
                     PrintInt(si);
-                    PrintLine("");
                     // Skip Channel.bux for debugging
                     if String_Eq(stdFiles[si], "./../stdlib/Std/Channel.bux") {
                         PrintLine("DEBUG: skipping Channel.bux");
@@ -505,7 +496,6 @@ func Cli_BuildProject(projectDir: String) -> int {
                 }
                 Print("Stdlib declarations added: ");
                 PrintInt(stdAdded);
-                PrintLine("");
             }
         }
     }
@@ -520,23 +510,29 @@ func Cli_BuildProject(projectDir: String) -> int {
     }
     Print("userMerged actual count=");
     PrintInt(countTest);
-    PrintLine("");
     Print("userMerged.itemCount=");
     PrintInt(userMerged.itemCount);
-    PrintLine("");
     var du: *Decl = userMerged.firstItem;
     while du != null as *Decl {
         if du.kind == dkFunc {
             Print("user func ");
             PrintLine(du.strValue);
         }
+        if du.kind == dkStruct {
+            Print("user struct ");
+            Print(du.strValue);
+            PrintInt(du.fieldCount);
+        }
+        if du.kind == dkImpl {
+            Print("user impl ");
+            PrintLine(du.strValue);
+        }
         du = du.childDecl2;
     }
     Cli_CopyModuleDecls(merged, userMerged);
     PrintLine("DEBUG: copy done");
     Print("merged.itemCount=");
     PrintInt(merged.itemCount);
-    PrintLine("");
     PrintLine("DEBUG: copy done");
 
     Print("Merged ");
@@ -679,12 +675,10 @@ func Cli_RunProject(projectDir: String) -> int {
 func Cli_Run(args: *String, argCount: int) -> int {
     Print("Cli_Run argCount=");
     PrintInt(argCount);
-    PrintLine("");
     if argCount < 2 {
         PrintLine("Bux Self-Hosting Compiler v0.2.0");
         PrintLine("Usage: buxc <command> [args]");
         PrintLine("Commands: build, check, run, version");
-        PrintLine("");
         PrintLine("Pipeline modules:");
         PrintLine("  Lexer      ✅  695 lines");
         PrintLine("  Parser     ✅ 1004 lines");

src_bux/hir_lower.bux

@@ -105,6 +105,24 @@ func Lcx_LowerExpr(ctx: *LowerCtx, expr: *Expr) -> *HirNode {
         n.strValue = expr.strValue;
         let sym: Symbol = Scope_Lookup(ctx.scope, expr.strValue);
         n.typeKind = sym.typeKind;
+        if expr.refType != null as *TypeExpr {
+            n.typeName = expr.refType.typeName;
+        }
+        if sym.typeName != null as String && !String_Eq(sym.typeName, "") {
+            n.typeName = sym.typeName;
+        }
+        return n;
+    }
+
+    // self → variable reference named "self"
+    if kind == ekSelf {
+        n.kind = hVar;
+        n.strValue = "self";
+        let sym: Symbol = Scope_Lookup(ctx.scope, "self");
+        n.typeKind = sym.typeKind;
+        if sym.typeName != null as String && !String_Eq(sym.typeName, "") {
+            n.typeName = sym.typeName;
+        }
         return n;
     }
 
@@ -135,6 +153,41 @@ func Lcx_LowerExpr(ctx: *LowerCtx, expr: *Expr) -> *HirNode {
     // Call
     if kind == ekCall {
         n.kind = hCall;
+        // Method call desugaring: obj.method(args) → Type_method(obj, args)
+        if expr.child1 != null as *Expr && expr.child1.kind == ekField {
+            let methodName: String = expr.child1.strValue;
+            var receiverTypeName: String = "";
+            if expr.child1.child1 != null as *Expr && expr.child1.child1.kind == ekIdent {
+                let sym: Symbol = Scope_Lookup(ctx.scope, expr.child1.child1.strValue);
+                receiverTypeName = sym.typeName;
+            }
+            if String_Eq(receiverTypeName, "") && expr.child1.child1 != null as *Expr && expr.child1.child1.refType != null as *TypeExpr {
+                receiverTypeName = expr.child1.child1.refType.typeName;
+            }
+            if !String_Eq(receiverTypeName, "") {
+                // Strip trailing '*' from pointer type names (e.g. "Box*" → "Box")
+                var baseName: String = receiverTypeName;
+                let len: int = bux_strlen(baseName) as int;
+                if len > 0 {
+                    let lastChar: String = bux_str_slice(baseName, (len - 1) as uint, 1);
+                    if String_Eq(lastChar, "*") {
+                        baseName = bux_str_slice(baseName, 0, (len - 1) as uint);
+                    }
+                }
+                n.strValue = String_Concat(baseName, "_");
+                n.strValue = String_Concat(n.strValue, methodName);
+            }
+            // Lower receiver as first argument
+            let recv: *HirNode = Lcx_LowerExpr(ctx, expr.child1.child1);
+            n.child1 = recv;
+            // Lower remaining arguments
+            if expr.child2 != null as *Expr {
+                let extra: *HirNode = Lcx_LowerExpr(ctx, expr.child2);
+                // Chain extra args after receiver via child2/child3
+                n.child2 = extra;
+            }
+            return n;
+        }
         // Get callee name
         if expr.child1 != null as *Expr && expr.child1.kind == ekIdent {
             n.strValue = expr.child1.strValue;
@@ -163,6 +216,10 @@ func Lcx_LowerExpr(ctx: *LowerCtx, expr: *Expr) -> *HirNode {
         n.kind = hFieldPtr;
         n.child1 = Lcx_LowerExpr(ctx, expr.child1);
         n.strValue = expr.strValue;
+        // Get struct type from base expr refType
+        if expr.child1 != null as *Expr && expr.child1.refType != null as *TypeExpr {
+            n.typeName = expr.child1.refType.typeName;
+        }
         return n;
     }
 
@@ -286,6 +343,13 @@ func Lcx_LowerStmt(ctx: *LowerCtx, stmt: *Stmt) -> *HirNode {
                 alloca.typeName = stmt.refStmtType.typeName;
             }
         }
+        // Add to scope for field offset lookups
+        var sym: Symbol;
+        sym.kind = skVar;
+        sym.name = stmt.strValue;
+        sym.typeKind = alloca.typeKind;
+        sym.typeName = alloca.typeName;
+        discard Scope_Define(ctx.scope, sym);
         // store the init value
         n.kind = hStore;
         n.child1 = alloca;
@@ -430,6 +494,27 @@ func Lcx_LowerFunc(ctx: *LowerCtx, decl: *Decl) -> *HirFunc {
         f.retTypeKind = 0;
     }
 
+    // Add parameters to hir_lower scope for field offset lookups
+    var pi: int = 0;
+    while pi < decl.paramCount {
+        var p: *Param = null as *Param;
+        if pi == 0 { p = &decl.param0; }
+        else if pi == 1 { p = &decl.param1; }
+        else if pi == 2 { p = &decl.param2; }
+        else if pi == 3 { p = &decl.param3; }
+        else if pi == 4 { p = &decl.param4; }
+        else if pi == 5 { p = &decl.param5; }
+        if p != null as *Param && p.refParamType != null as *TypeExpr {
+            var sym: Symbol;
+            sym.kind = skVar;
+            sym.name = p.name;
+            sym.typeKind = Lcx_ResolveTypeKind(p.refParamType);
+            sym.typeName = p.refParamType.typeName;
+            discard Scope_Define(ctx.scope, sym);
+        }
+        pi = pi + 1;
+    }
+
     if decl.refBody != null as *Block {
         f.body = Lcx_LowerBlock(ctx, decl.refBody, -1);
     } else {
@@ -449,7 +534,7 @@ func HirLower_LowerModule(mod: *Module, sema: *Sema) -> *HirModule {
     ctx.scope = sema.scope;
     ctx.funcs = bux_alloc(256 as uint * sizeof(HirFunc)) as *HirFunc;
     ctx.funcCount = 0;
-    ctx.externFuncs = bux_alloc(64 as uint * sizeof(HirFunc)) as *HirFunc;
+    ctx.externFuncs = bux_alloc(256 as uint * sizeof(HirFunc)) as *HirFunc;
     ctx.externCount = 0;
     ctx.varCounter = 0;
 
@@ -473,6 +558,20 @@ func HirLower_LowerModule(mod: *Module, sema: *Sema) -> *HirModule {
             ctx.funcs[ctx.funcCount] = *f;
             ctx.funcCount = ctx.funcCount + 1;
         }
+        if decl.kind == dkImpl {
+            let implTypeName: String = decl.strValue;
+            var implDecl: *Decl = decl.childDecl1;
+            while implDecl != null as *Decl {
+                if implDecl.kind == dkFunc {
+                    let mangled: String = String_Concat(implTypeName, "_");
+                    implDecl.strValue = String_Concat(mangled, implDecl.strValue);
+                    let f: *HirFunc = Lcx_LowerFunc(ctx, implDecl);
+                    ctx.funcs[ctx.funcCount] = *f;
+                    ctx.funcCount = ctx.funcCount + 1;
+                }
+                implDecl = implDecl.childDecl2;
+            }
+        }
         if decl.kind == dkExternFunc {
             let f: *HirFunc = Lcx_LowerFunc(ctx, decl);
             ctx.externFuncs[ctx.externCount] = *f;
@@ -534,11 +633,13 @@ func HirLower_LowerModule(mod: *Module, sema: *Sema) -> *HirModule {
         decl = decl.childDecl2;
     }
 
+
     hm.funcCount = ctx.funcCount;
     hm.funcs = ctx.funcs;
     hm.externCount = ctx.externCount;
     hm.externFuncs = ctx.externFuncs;
 
+
     return hm;
 }
 

src_bux/parser.bux

@@ -44,6 +44,29 @@ func parserPeek(p: *Parser, ahead: int) -> int {
     return tkEndOfFile;
 }
 
+// Lookahead to determine if '<' starts a type argument list.
+func parserIsTypeArgListAhead(p: *Parser) -> bool {
+    if !parserCheck(p, tkLt) { return false; }
+    var depth: int = 0;
+    var ahead: int = 0;
+    while true {
+        let kind: int = parserPeek(p, ahead);
+        if kind == tkEndOfFile || kind == tkLBrace || kind == tkSemicolon {
+            return false;
+        }
+        if kind == tkLt {
+            depth = depth + 1;
+        } else if kind == tkGt {
+            depth = depth - 1;
+            if depth == 0 {
+                return true;
+            }
+        }
+        ahead = ahead + 1;
+    }
+    return false;
+}
+
 func parserAdvance(p: *Parser) -> LexToken {
     let tok: LexToken = parserCurToken(p);
     if p.pos < p.tokenCount {
@@ -331,6 +354,25 @@ func parserParsePostfix(p: *Parser) -> *Expr {
             continue;
         }
 
+        // Generic call: Func<Type>(args)  or  Type<T> { ... }
+        if kind == tkLt {
+            if left.kind == ekIdent && parserIsTypeArgListAhead(p) {
+                discard parserAdvance(p); // <
+                let ta0: LexToken = parserExpect(p, tkIdent, "expected type argument");
+                left.genericCallee = left.strValue;
+                left.genericTypeArg0 = ta0.text;
+                left.genericTypeArgCount = 1;
+                if parserMatch(p, tkComma) {
+                    let ta1: LexToken = parserExpect(p, tkIdent, "expected type argument");
+                    left.genericTypeArg1 = ta1.text;
+                    left.genericTypeArgCount = 2;
+                }
+                discard parserExpect(p, tkGt, "expected '>' to close type arguments");
+                // After generic args, continue loop to handle call or struct init
+                continue;
+            }
+        }
+
         // Index: expr[expr]
         if kind == tkLBracket {
             discard parserAdvance(p);
@@ -1285,7 +1327,7 @@ func parserParseDecl(p: *Parser) -> *Decl {
                 if d.methodCount == 0 {
                     d.childDecl1 = m;
                 } else if d.methodCount == 1 {
-                    d.childDecl2 = m;
+                    d.childDecl1.childDecl2 = m;
                 }
                 d.methodCount = d.methodCount + 1;
             } else {

src_bux/qbe_backend.bux

@@ -266,7 +266,7 @@ func QBE_IsTerminator(node: *HirNode) -> bool {
     if node.kind == hBreak { return true; }
     if node.kind == hContinue { return true; }
     if node.kind == hIf {
-        if node.extraData != null as *HirNode {
+        if node.extraData != null as *void {
             return QBE_IsTerminator(node.child2) && QBE_IsTerminator(node.extraData as *HirNode);
         }
         return false;
@@ -307,6 +307,74 @@ func QBE_FindFunc(qbe: *QbeEmitter, name: String) -> *HirFunc {
     return null as *HirFunc;
 }
 
+// ---------------------------------------------------------------------------
+// Helper: find struct by name in module
+// ---------------------------------------------------------------------------
+
+func QBE_FindStruct(qbe: *QbeEmitter, name: String) -> *HirStruct {
+    if qbe.mod == null as *HirModule || name == null as String { return null as *HirStruct; }
+    var i: int = 0;
+    while i < qbe.mod.structCount {
+        if String_Eq(qbe.mod.structs[i].name, name) {
+            return &qbe.mod.structs[i];
+        }
+        i = i + 1;
+    }
+    return null as *HirStruct;
+}
+
+// ---------------------------------------------------------------------------
+// Helper: compute field offset in a struct
+// ---------------------------------------------------------------------------
+
+func QBE_FieldOffset(qbe: *QbeEmitter, structName: String, fieldName: String) -> int {
+    let st: *HirStruct = QBE_FindStruct(qbe, structName);
+    if st == null as *HirStruct { return 0; }
+    var off: int = 0;
+    var fi: int = 0;
+    while fi < st.fieldCount {
+        if String_Eq(st.fields[fi].name, fieldName) {
+            return off;
+        }
+        let ftype: String = st.fields[fi].typeName;
+        var fsz: int = 8;
+        if String_Eq(ftype, "int8") || String_Eq(ftype, "uint8") || String_Eq(ftype, "bool8") || String_Eq(ftype, "char8") { fsz = 1; }
+        else if String_Eq(ftype, "int16") || String_Eq(ftype, "uint16") || String_Eq(ftype, "bool16") || String_Eq(ftype, "char16") { fsz = 2; }
+        else if String_Eq(ftype, "int32") || String_Eq(ftype, "uint32") || String_Eq(ftype, "bool32") || String_Eq(ftype, "char32") || String_Eq(ftype, "float32") { fsz = 4; }
+        off = off + fsz;
+        fi = fi + 1;
+    }
+    return 0;
+}
+
+// ---------------------------------------------------------------------------
+// Helper: type size in bytes
+// ---------------------------------------------------------------------------
+
+func QBE_TypeSize(qbe: *QbeEmitter, kind: int, typeName: String) -> int {
+    if kind == tyNamed && typeName != null as String && !String_Eq(typeName, "") {
+        let st: *HirStruct = QBE_FindStruct(qbe, typeName);
+        if st != null as *HirStruct && st.fields != null as *HirStructField {
+            var sz: int = 0;
+            var fi: int = 0;
+            while fi < st.fieldCount {
+                let ftype: String = st.fields[fi].typeName;
+                var fsz: int = 8;
+                if String_Eq(ftype, "int8") || String_Eq(ftype, "uint8") || String_Eq(ftype, "bool8") || String_Eq(ftype, "char8") { fsz = 1; }
+                else if String_Eq(ftype, "int16") || String_Eq(ftype, "uint16") || String_Eq(ftype, "bool16") || String_Eq(ftype, "char16") { fsz = 2; }
+                else if String_Eq(ftype, "int32") || String_Eq(ftype, "uint32") || String_Eq(ftype, "bool32") || String_Eq(ftype, "char32") || String_Eq(ftype, "float32") { fsz = 4; }
+                sz = sz + fsz;
+                fi = fi + 1;
+            }
+            return sz;
+        }
+    }
+    if kind == tyBool8 || kind == tyChar8 || kind == tyInt8 || kind == tyUInt8 { return 1; }
+    if kind == tyBool16 || kind == tyChar16 || kind == tyInt16 || kind == tyUInt16 { return 2; }
+    if kind == tyBool32 || kind == tyChar32 || kind == tyInt32 || kind == tyUInt32 || kind == tyFloat32 { return 4; }
+    return 8;
+}
+
 // ---------------------------------------------------------------------------
 // Helper: determine QBE type for any HIR node
 // ---------------------------------------------------------------------------
@@ -411,6 +479,23 @@ func QBE_EmitExpr(qbe: *QbeEmitter, node: *HirNode) -> String {
         var target: String = "";
         if node.child1 != null as *HirNode && node.child1.kind == hVar {
             target = QBE_LocalName(node.child1.strValue);
+        } else if node.child1 != null as *HirNode && node.child1.kind == hFieldPtr {
+            // Field assignment: generate pointer, not auto-load value
+            let base: String = QBE_EmitExpr(qbe, node.child1.child1);
+            let ptrTmp: String = QBE_FreshTemp(qbe);
+            var structName: String = node.child1.typeName;
+            if structName == null as String || String_Eq(structName, "") {
+                structName = node.child1.child1.typeName;
+            }
+            let offset: int = QBE_FieldOffset(qbe, structName, node.child1.strValue);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, ptrTmp);
+            QBE_Emit(qbe, " =l add ");
+            QBE_Emit(qbe, QBE_EnsureLocal(base));
+            QBE_Emit(qbe, ", ");
+            QBE_Emit(qbe, String_FromInt(offset as int64));
+            QBE_EmitLine(qbe, "");
+            target = ptrTmp;
         } else {
             target = QBE_EmitExpr(qbe, node.child1);
             if String_Eq(target, "") { return "0"; }
@@ -659,18 +744,84 @@ func QBE_EmitExpr(qbe: *QbeEmitter, node: *HirNode) -> String {
         return tmp;
     }
 
-    // Field pointer: &obj.field
+    // Field pointer: &obj.field  (with auto-load for rvalue contexts)
     if kind == hFieldPtr {
         let base: String = QBE_EmitExpr(qbe, node.child1);
-        let tmp: String = QBE_FreshTemp(qbe);
+        let ptrTmp: String = QBE_FreshTemp(qbe);
-        // add base, offset — need to know offset; for now assume 0 for first field
+        var structName: String = node.typeName;
+        if structName == null as String || String_Eq(structName, "") {
+            structName = node.child1.typeName;
+        }
+        let offset: int = QBE_FieldOffset(qbe, structName, node.strValue);
         QBE_EmitIndent(qbe);
-        QBE_Emit(qbe, tmp);
+        QBE_Emit(qbe, ptrTmp);
         QBE_Emit(qbe, " =l add ");
         QBE_Emit(qbe, QBE_EnsureLocal(base));
-        QBE_Emit(qbe, ", 0");
+        QBE_Emit(qbe, ", ");
+        QBE_Emit(qbe, String_FromInt(offset as int64));
         QBE_EmitLine(qbe, "");
-        return tmp;
+        // Auto-load value from field address (rvalue context)
+        let valTmp: String = QBE_FreshTemp(qbe);
+        let fty: String = QbeBackend_TypeWord(node.typeKind);
+        QBE_EmitIndent(qbe);
+        QBE_Emit(qbe, valTmp);
+        QBE_Emit(qbe, " =");
+        QBE_Emit(qbe, fty);
+        QBE_Emit(qbe, " load");
+        QBE_Emit(qbe, fty);
+        QBE_Emit(qbe, " ");
+        QBE_Emit(qbe, QBE_EnsureLocal(ptrTmp));
+        QBE_EmitLine(qbe, "");
+        return valTmp;
+    }
+
+    // Struct init: allocate and fill fields
+    if kind == hStructInit {
+        let st: *HirStruct = QBE_FindStruct(qbe, node.strValue);
+        var structSize: int = 0;
+        if st != null as *HirStruct {
+            var si: int = 0;
+            while si < st.fieldCount {
+                let ftype: String = st.fields[si].typeName;
+                var fsz: int = 8;
+                if String_Eq(ftype, "int8") || String_Eq(ftype, "uint8") || String_Eq(ftype, "bool8") || String_Eq(ftype, "char8") { fsz = 1; }
+                else if String_Eq(ftype, "int16") || String_Eq(ftype, "uint16") || String_Eq(ftype, "bool16") || String_Eq(ftype, "char16") { fsz = 2; }
+                else if String_Eq(ftype, "int32") || String_Eq(ftype, "uint32") || String_Eq(ftype, "bool32") || String_Eq(ftype, "char32") || String_Eq(ftype, "float32") { fsz = 4; }
+                structSize = structSize + fsz;
+                si = si + 1;
+            }
+        }
+        let ptr: String = QBE_FreshTemp(qbe);
+        QBE_EmitIndent(qbe);
+        QBE_Emit(qbe, ptr);
+        QBE_Emit(qbe, " =l alloc4 ");
+        let szStr: String = String_FromInt(structSize as int64);
+        QBE_Emit(qbe, szStr);
+        QBE_EmitLine(qbe, "");
+        // Store each field
+        var field: *HirNode = node.child1;
+        while field != null as *HirNode {
+            let fval: String = QBE_EmitExpr(qbe, field.child1);
+            let foff: int = QBE_FieldOffset(qbe, node.strValue, field.strValue);
+            let fptr: String = QBE_FreshTemp(qbe);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, fptr);
+            QBE_Emit(qbe, " =l add ");
+            QBE_Emit(qbe, QBE_EnsureLocal(ptr));
+            QBE_Emit(qbe, ", ");
+            QBE_Emit(qbe, String_FromInt(foff as int64));
+            QBE_EmitLine(qbe, "");
+            let fty: String = QbeBackend_TypeWord(field.child1.typeKind);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, "store");
+            QBE_Emit(qbe, fty);
+            QBE_Emit(qbe, " ");
+            QBE_Emit(qbe, QBE_EnsureLocal(fval));
+            QBE_Emit(qbe, ", ");
+            QBE_EmitLine(qbe, QBE_EnsureLocal(fptr));
+            field = field.child3;
+        }
+        return ptr;
     }
 
     // Index pointer: &arr[idx]  (for pointer indexing)
@@ -744,6 +895,34 @@ func QBE_EmitStmt(qbe: *QbeEmitter, node: *HirNode) {
             }
             return;
         }
+        // Field assignment: target is hFieldPtr, need pointer not value
+        if node.child1 != null as *HirNode && node.child1.kind == hFieldPtr {
+            let base: String = QBE_EmitExpr(qbe, node.child1.child1);
+            let ptrTmp: String = QBE_FreshTemp(qbe);
+            var structName: String = node.child1.typeName;
+            if structName == null as String || String_Eq(structName, "") {
+                structName = node.child1.child1.typeName;
+            }
+            let offset: int = QBE_FieldOffset(qbe, structName, node.child1.strValue);
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, ptrTmp);
+            QBE_Emit(qbe, " =l add ");
+            QBE_Emit(qbe, QBE_EnsureLocal(base));
+            QBE_Emit(qbe, ", ");
+            QBE_Emit(qbe, String_FromInt(offset as int64));
+            QBE_EmitLine(qbe, "");
+            let val: String = QBE_EmitExpr(qbe, node.child2);
+            let ty: String = QBE_NodeType(qbe, node.child2);
+            if String_Eq(val, "") { val = "0"; }
+            QBE_EmitIndent(qbe);
+            QBE_Emit(qbe, "store");
+            QBE_Emit(qbe, ty);
+            QBE_Emit(qbe, " ");
+            QBE_Emit(qbe, QBE_EnsureLocal(val));
+            QBE_Emit(qbe, ", ");
+            QBE_EmitLine(qbe, QBE_EnsureLocal(ptrTmp));
+            return;
+        }
         // Plain assignment
         let target: String = QBE_EmitExpr(qbe, node.child1);
         let val: String = QBE_EmitExpr(qbe, node.child2);
@@ -786,7 +965,7 @@ func QBE_EmitStmt(qbe: *QbeEmitter, node: *HirNode) {
         QBE_Emit(qbe, ", ");
         QBE_Emit(qbe, lThen);
         QBE_Emit(qbe, ", ");
-        var hasElse: bool = node.extraData != null as *HirNode;
+        var hasElse: bool = node.extraData != null as *void;
         if hasElse {
             QBE_EmitLine(qbe, lElse);
         } else {

src_bux/sema.bux

@@ -2,6 +2,8 @@
 // Validates types, resolves identifiers, checks function calls.
 module Sema {
 
+
+
 // ---------------------------------------------------------------------------
 // Sema context
 // ---------------------------------------------------------------------------
@@ -130,6 +132,12 @@ func Sema_CheckExpr(sema: *Sema, expr: *Expr) -> int {
             Sema_EmitError(sema, expr.line, expr.column, "undeclared identifier");
             return tyUnknown;
         }
+        if sym.typeName != null as String && !String_Eq(sym.typeName, "") {
+            let te: *TypeExpr = bux_alloc(sizeof(TypeExpr)) as *TypeExpr;
+            te.kind = tekNamed;
+            te.typeName = sym.typeName;
+            expr.refType = te;
+        }
         return sym.typeKind;
     }
 
@@ -212,6 +220,10 @@ func Sema_CheckStmt(sema: *Sema, stmt: *Stmt) {
         sym.kind = skVar;
         sym.name = stmt.strValue;
         sym.typeKind = initType;
+        sym.typeName = "";
+        if stmt.refStmtType != null as *TypeExpr {
+            sym.typeName = stmt.refStmtType.typeName;
+        }
         sym.isMutable = stmt.boolValue;
         sym.isPublic = false;
         discard Scope_Define(sema.scope, sym);
@@ -350,9 +362,22 @@ func Sema_Analyze(mod: *Module) -> *Sema {
             // Add parameters to scope
             var i: int = 0;
             while i < decl.paramCount {
+                var p: *Param = null as *Param;
+                if i == 0 { p = &decl.param0; }
+                else if i == 1 { p = &decl.param1; }
+                else if i == 2 { p = &decl.param2; }
+                else if i == 3 { p = &decl.param3; }
+                else if i == 4 { p = &decl.param4; }
+                else if i == 5 { p = &decl.param5; }
                 var pSym: Symbol;
                 pSym.kind = skVar;
-                pSym.typeKind = tyInt; // simplified
+                if p != null as *Param && p.refParamType != null as *TypeExpr {
+                    pSym.typeKind = Sema_ResolveType(s, p.refParamType);
+                    pSym.typeName = p.refParamType.typeName;
+                } else {
+                    pSym.typeKind = tyInt;
+                    pSym.typeName = "";
+                }
                 pSym.isMutable = false;
                 if i == 0 { pSym.name = decl.param0.name; }
                 else if i == 1 { pSym.name = decl.param1.name; }