feat(core): for 支持定长数组与列表字面量迭代，其余字面量 fast-fail
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TermiNexus committed
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1 file changed
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@@ -93,8 +93,25 @@ class ForHandle(HandlesBase.Mixin):
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HandlesType.fatal_error(iter_node, err_msg)
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HandlesType.fatal_error(iter_node, err_msg)
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HandlesType.fatal_error(iter_node, "仅支持 range() 或指针迭代")
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HandlesType.fatal_error(iter_node, "仅支持 range() 或指针迭代")
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# 非范围迭代：走指针迭代路径
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# 非范围迭代：走指针/数组/列表字面量迭代路径
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if is_range_iter == 0:
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if is_range_iter == 0:
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# 列表字面量：按元素顺序迭代（for x in [1, 2, 3]）
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if iter_node.kind() == ast.ASTKind.List:
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return self._handle_list_literal_iter(for_node, var_name, iter_node)
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# 其它不支持的字面量：fast-fail 显式报错，
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# 避免 translate_value 触发 list[T] 特化崩溃或语义歧义。
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ik: int = iter_node.kind()
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if ik == ast.ASTKind.Constant:
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cn_ik: ast.Constant | t.CPtr = (ast.Constant | t.CPtr)(iter_node)
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if cn_ik.const_kind != ast.CONST_STR:
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HandlesType.fatal_error(
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iter_node,
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"for 迭代不支持该常量（仅支持字符串、数组、列表字面量、range()）")
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elif ik == ast.ASTKind.Dict or ik == ast.ASTKind.Set or ik == ast.ASTKind.Tuple \
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or ik == ast.ASTKind.SetComp or ik == ast.ASTKind.DictComp:
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HandlesType.fatal_error(
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iter_node,
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"for 迭代不支持字典/集合/元组字面量，请使用 range()、t.CArray 数组或列表字面量")
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return self._handle_ptr_iter(for_node, var_name)
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return self._handle_ptr_iter(for_node, var_name)
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call: ast.Call | t.CPtr = (ast.Call | t.CPtr)(iter_node)
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call: ast.Call | t.CPtr = (ast.Call | t.CPtr)(iter_node)
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@@ -287,8 +304,11 @@ class ForHandle(HandlesBase.Mixin):
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if ptr_val is None:
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if ptr_val is None:
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HandlesType.fatal_error(for_node, "指针迭代: 无法翻译迭代器表达式")
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HandlesType.fatal_error(for_node, "指针迭代: 无法翻译迭代器表达式")
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# 检查是否是指针类型
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# 检查迭代器类型
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if HandlesExpr.is_ptr_type(ptr_val.Ty) == 0:
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if HandlesExpr.is_ptr_type(ptr_val.Ty) == 0:
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# 数组迭代：for k in arr（定长数组按长度迭代，元素可为任意类型）
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if HandlesExpr.is_array_type(ptr_val.Ty) != 0:
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return self._handle_array_iter(for_node, var_name, ptr_val)
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HandlesType.fatal_error(for_node, "指针迭代: 迭代器不是指针类型")
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HandlesType.fatal_error(for_node, "指针迭代: 迭代器不是指针类型")
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# 获取元素类型
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# 获取元素类型
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@@ -384,6 +404,199 @@ class ForHandle(HandlesBase.Mixin):
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llvmlite.position_at_end(builder, end_bb)
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llvmlite.position_at_end(builder, end_bb)
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return new_vars
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return new_vars
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# ============================================================
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# _handle_array_iter - 数组迭代: for x in arr:
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# 定长数组按长度迭代（元素可为任意类型，不做 null 终止符检查）
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#
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# 数组值是数组类型而非指针（如局部 t.CArray 修复后），
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# 先拷到临时 alloca 获得地址，再按 [0, N) 迭代。
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#
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# 生成 IR 结构:
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# %tmp = alloca [N x elem_ty]
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# store [N x elem_ty] %arr_val, [N x elem_ty]* %tmp
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# %idx = alloca i32 ; store 0
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# br %cond
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# cond:
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# %i = load i32, i32* %idx
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# %c = icmp slt i32 %i, N
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# br i1 %c, %body, %end
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# body:
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# %ep = getelementptr [N x elem_ty], [N x elem_ty]* %tmp, i32 0, i32 %i
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# %ev = load elem_ty, elem_ty* %ep
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# store elem_ty %ev, elem_ty* %var
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# ... 循环体 ...
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# br %incr
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# incr:
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# %n = add i32 %i, 1 ; store %n ; br %cond
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# end:
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# ============================================================
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def _handle_array_iter(self, for_node: ast.For | t.CPtr,
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var_name: str,
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array_val: llvmlite.Value | t.CPtr) -> int:
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"""数组迭代: for x in arr: 按数组长度迭代"""
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trans: HT.Translator | t.CPtr = self.Trans
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pool: memhub.MemBuddy | t.CPtr = trans.Pool
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builder: llvmlite.IRBuilder | t.CPtr = trans._cur_builder
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func: llvmlite.Function | t.CPtr = trans._cur_func
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# 解析数组类型 [N x elem_ty]
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arr_ty: llvmlite.LLVMType | t.CPtr = array_val.Ty
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elem_ty: llvmlite.LLVMType | t.CPtr = None
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elem_count: int = 0
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match arr_ty:
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case llvmlite.LLVMType.Array(et, n):
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elem_ty = et
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elem_count = n
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if elem_ty is None or elem_count <= 0:
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HandlesType.fatal_error(for_node, "数组迭代: 无法解析数组类型")
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# 数组值 → 临时 alloca（数组值不是指针，需拷贝后 GEP 迭代）
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arr_tmp: llvmlite.Value | t.CPtr = llvmlite.build_alloca(builder, arr_ty)
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if arr_tmp is None:
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HandlesType.fatal_error(for_node, "数组迭代: 临时存储分配失败")
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llvmlite.build_store(builder, array_val, arr_tmp)
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i32_ty: llvmlite.LLVMType | t.CPtr = llvmlite.Int32(pool)
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# 循环变量 alloca（存储元素值）
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var_alloca: llvmlite.Value | t.CPtr = HandlesVar.lookup_var(
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trans.SymTab, var_name)
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new_vars: int = 0
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if var_alloca is None:
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var_alloca = HandlesVar._alloca_at_entry(builder, elem_ty)
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if HandlesVar.define_var(
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trans.SymTab, var_name, var_alloca) == 0:
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new_vars = 1
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# 隐式 index 变量，初始为 0
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idx_alloca: llvmlite.Value | t.CPtr = HandlesVar._alloca_at_entry(builder, i32_ty)
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llvmlite.build_store(builder, llvmlite.const_int32(pool, 0), idx_alloca)
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# 基本块: cond / body / incr / end
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cnt: int = trans._label_counter
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trans._label_counter = cnt + 1
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name_buf: t.CChar | t.CPtr = pool.alloc(32)
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viperlib.snprintf(name_buf, 32, "arr.cond.%d", cnt)
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cond_bb: llvmlite.BasicBlock | t.CPtr = llvmlite.create_block(pool, func, name_buf)
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viperlib.snprintf(name_buf, 32, "arr.body.%d", cnt)
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body_bb: llvmlite.BasicBlock | t.CPtr = llvmlite.create_block(pool, func, name_buf)
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viperlib.snprintf(name_buf, 32, "arr.incr.%d", cnt)
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incr_bb: llvmlite.BasicBlock | t.CPtr = llvmlite.create_block(pool, func, name_buf)
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viperlib.snprintf(name_buf, 32, "arr.end.%d", cnt)
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end_bb: llvmlite.BasicBlock | t.CPtr = llvmlite.create_block(pool, func, name_buf)
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llvmlite.build_br(builder, cond_bb)
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# cond 块: load index, icmp slt idx, elem_count
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llvmlite.position_at_end(builder, cond_bb)
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cur_idx: llvmlite.Value | t.CPtr = llvmlite.build_load(builder, i32_ty, idx_alloca)
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count_val: llvmlite.Value | t.CPtr = llvmlite.const_int32(pool, elem_count)
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in_bounds: llvmlite.Value | t.CPtr = llvmlite.build_icmp(
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builder, llvmlite.ICMP_SLT, cur_idx, count_val)
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llvmlite.build_cond_br(builder, in_bounds, body_bb, end_bb)
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# body 块: GEP(0, idx) → load elem → store to var → 循环体
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llvmlite.position_at_end(builder, body_bb)
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elem_ptr: llvmlite.Value | t.CPtr = llvmlite.build_gep_array(
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builder, arr_ty, elem_ty, arr_tmp, cur_idx)
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cur_elem: llvmlite.Value | t.CPtr = llvmlite.build_load(builder, elem_ty, elem_ptr)
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llvmlite.build_store(builder, cur_elem, var_alloca)
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old_break: llvmlite.BasicBlock | t.CPtr = trans._break_bb
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old_continue: llvmlite.BasicBlock | t.CPtr = trans._continue_bb
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trans._break_bb = end_bb
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trans._continue_bb = incr_bb
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body: list[ast.AST | t.CPtr] | t.CPtr = for_node.children
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if body is not None:
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body_count: t.CSizeT = body.__len__()
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for bi in range(body_count):
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stmt: ast.AST | t.CPtr = body.get(bi)
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if stmt is not None:
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HandlesBody.translate_stmt(trans, stmt)
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trans._break_bb = old_break
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trans._continue_bb = old_continue
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if llvmlite.builder_cur_block_is_terminated(builder) == 0:
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llvmlite.build_br(builder, incr_bb)
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# incr 块: index++
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llvmlite.position_at_end(builder, incr_bb)
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one_val: llvmlite.Value | t.CPtr = llvmlite.const_int32(pool, 1)
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next_idx: llvmlite.Value | t.CPtr = llvmlite.build_add(builder, cur_idx, one_val)
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llvmlite.build_store(builder, next_idx, idx_alloca)
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llvmlite.build_br(builder, cond_bb)
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# 定位到 end 块
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llvmlite.position_at_end(builder, end_bb)
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return new_vars
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# ============================================================
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# _handle_list_literal_iter - 列表字面量迭代: for x in [a, b, c]:
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# 把列表字面量转成定长数组值，再复用数组迭代（按长度迭代）。
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#
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# 元素类型取第一个元素的值类型，其余元素 coerce 到该类型。
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# ============================================================
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def _handle_list_literal_iter(self, for_node: ast.For | t.CPtr,
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var_name: str,
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list_node: ast.AST | t.CPtr) -> int:
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"""列表字面量迭代: for x in [a, b, c]: 按元素顺序迭代"""
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trans: HT.Translator | t.CPtr = self.Trans
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pool: memhub.MemBuddy | t.CPtr = trans.Pool
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builder: llvmlite.IRBuilder | t.CPtr = trans._cur_builder
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lst: ast.List | t.CPtr = (ast.List | t.CPtr)(list_node)
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if lst is None or lst.elts is None:
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HandlesType.fatal_error(for_node, "列表字面量迭代: 空列表")
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elts: list[ast.AST | t.CPtr] | t.CPtr = lst.elts
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elts_count: t.CSizeT = elts.__len__()
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if elts_count <= 0:
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HandlesType.fatal_error(for_node, "列表字面量迭代: 空列表")
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# 翻译第一个元素，确定元素类型
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first_el: ast.AST | t.CPtr = elts.get(0)
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first_val: llvmlite.Value | t.CPtr = HandlesExpr.translate_value(
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builder, pool, trans.Module, first_el,
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trans._funcs, trans._func_count, trans)
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if first_val is None or first_val.Ty is None:
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HandlesType.fatal_error(first_el, "列表字面量迭代: 无法确定元素类型")
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elem_ty: llvmlite.LLVMType | t.CPtr = first_val.Ty
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# 构建 [N x elem_ty] 数组值：临时 alloca 逐元素写入后 load
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arr_ty: llvmlite.LLVMType | t.CPtr = llvmlite.Array(pool, elem_ty, elts_count)
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tmp_alloca: llvmlite.Value | t.CPtr = llvmlite.build_alloca(builder, arr_ty)
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if tmp_alloca is None:
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HandlesType.fatal_error(for_node, "列表字面量迭代: 临时数组分配失败")
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first_ptr: llvmlite.Value | t.CPtr = llvmlite.build_gep_array(
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builder, arr_ty, elem_ty, tmp_alloca, llvmlite.const_int32(pool, 0))
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if first_ptr is not None:
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llvmlite.build_store(builder, first_val, first_ptr)
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# 写其余元素（coerce 到 elem_ty）
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i: t.CSizeT = 1
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while i < elts_count:
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el_node: ast.AST | t.CPtr = elts.get(i)
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el_val: llvmlite.Value | t.CPtr = HandlesExpr.translate_value(
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builder, pool, trans.Module, el_node,
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trans._funcs, trans._func_count, trans)
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if el_val is not None:
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el_val = HandlesExpr.coerce_to_type(builder, el_val, elem_ty, el_node)
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el_ptr: llvmlite.Value | t.CPtr = llvmlite.build_gep_array(
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builder, arr_ty, elem_ty, tmp_alloca,
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llvmlite.const_int32(pool, i))
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if el_ptr is not None:
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llvmlite.build_store(builder, el_val, el_ptr)
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i += 1
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# load 回数组值，复用数组迭代
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arr_val: llvmlite.Value | t.CPtr = llvmlite.build_load(builder, arr_ty, tmp_alloca)
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if arr_val is None:
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HandlesType.fatal_error(for_node, "列表字面量迭代: 数组加载失败")
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return self._handle_array_iter(for_node, var_name, arr_val)
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# ============================================================
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# ============================================================
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# NewForHandle - 工厂函数
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# NewForHandle - 工厂函数
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Reference in new issue
Block a user