`#sizeof` allowed in constant expression
parent
d006ea98dd
commit
bfb3e7fcb1
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@ -114,18 +114,20 @@ TypeTableEntry *new_type_table_entry(TypeTableEntryId id) {
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return entry;
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}
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static TypeTableEntry *get_number_literal_type_unsigned(CodeGen *g, uint64_t x) {
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NumLit kind;
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static NumLit get_number_literal_kind_unsigned(uint64_t x) {
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if (x <= UINT8_MAX) {
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kind = NumLitU8;
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return NumLitU8;
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} else if (x <= UINT16_MAX) {
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kind = NumLitU16;
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return NumLitU16;
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} else if (x <= UINT32_MAX) {
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kind = NumLitU32;
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return NumLitU32;
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} else {
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kind = NumLitU64;
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return NumLitU64;
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}
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return g->num_lit_types[kind];
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}
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static TypeTableEntry *get_number_literal_type_unsigned(CodeGen *g, uint64_t x) {
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return g->num_lit_types[get_number_literal_kind_unsigned(x)];
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}
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TypeTableEntry *get_pointer_to_type(CodeGen *g, TypeTableEntry *child_type, bool is_const) {
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@ -243,6 +245,26 @@ static TypeTableEntry *eval_const_expr(CodeGen *g, BlockContext *context,
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case NodeTypeBinOpExpr:
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zig_panic("TODO eval_const_expr bin op expr");
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break;
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case NodeTypeCompilerFnType:
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{
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Buf *name = &node->data.compiler_fn_type.name;
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TypeTableEntry *expr_type = node->codegen_node->expr_node.type_entry;
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if (buf_eql_str(name, "sizeof")) {
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TypeTableEntry *target_type = node->data.compiler_fn_type.type->codegen_node->data.type_node.entry;
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out_number_literal->overflow = false;
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out_number_literal->data.x_uint = target_type->size_in_bits / 8;
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out_number_literal->kind = get_number_literal_kind_unsigned(out_number_literal->data.x_uint);
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return expr_type;
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} else if (buf_eql_str(name, "max_value")) {
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zig_panic("TODO eval_const_expr max_value");
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} else if (buf_eql_str(name, "min_value")) {
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zig_panic("TODO eval_const_expr min_value");
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} else {
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return g->builtin_types.entry_invalid;
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}
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break;
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}
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case NodeTypeSymbol:
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{
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VariableTableEntry *var = find_variable(context, &node->data.symbol);
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