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support generic data structures

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See #22
This commit is contained in:
Andrew Kelley 2016-05-07 17:00:58 -07:00
parent 01c46eef3a
commit 2ed72022ce
7 changed files with 155 additions and 69 deletions
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2
doc/langref.md
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@ -15,7 +15,7 @@ GlobalVarDecl = VariableDeclaration ";"
VariableDeclaration = ("var" | "const") "Symbol" option(":" TypeExpr) "=" Expression
ContainerDecl = ("struct" | "enum" | "union") "Symbol" "{" many(StructMember) "}"
ContainerDecl = ("struct" | "enum" | "union") "Symbol" option(ParamDeclList) "{" many(StructMember) "}"
StructMember = many(Directive) option(VisibleMod) (StructField | FnDef)

4
src/all_types.hpp
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@ -600,12 +600,16 @@ struct AstNodeStructDecl {
TopLevelDecl top_level_decl;
Buf name;
ContainerKind kind;
ZigList<AstNode *> generic_params;
bool generic_params_is_var_args; // always an error but it can happen from parsing
ZigList<AstNode *> fields;
ZigList<AstNode *> fns;
// populated by semantic analyzer
BlockContext *block_context;
TypeTableEntry *type_entry;
TypeTableEntry *generic_fn_type;
bool skip;
};
struct AstNodeStructField {

183
src/analyze.cpp
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@ -756,11 +756,11 @@ static TypeTableEntryId container_to_type(ContainerKind kind) {
zig_unreachable();
}
TypeTableEntry *get_partial_container_type(CodeGen *g, ImportTableEntry *import,
TypeTableEntry *get_partial_container_type(CodeGen *g, ImportTableEntry *import, BlockContext *context,
ContainerKind kind, AstNode *decl_node, const char *name)
{
TypeTableEntryId type_id = container_to_type(kind);
TypeTableEntry *entry = new_container_type_entry(type_id, decl_node, import->block_context);
TypeTableEntry *entry = new_container_type_entry(type_id, decl_node, context);
switch (kind) {
case ContainerKindStruct:
@ -1171,6 +1171,8 @@ static void resolve_enum_type(CodeGen *g, ImportTableEntry *import, TypeTableEnt
uint64_t biggest_align_in_bits = 0;
uint64_t biggest_union_member_size_in_bits = 0;
BlockContext *context = enum_type->data.enumeration.block_context;
// set temporary flag
enum_type->data.enumeration.embedded_in_current = true;
@ -1179,7 +1181,7 @@ static void resolve_enum_type(CodeGen *g, ImportTableEntry *import, TypeTableEnt
AstNode *field_node = decl_node->data.struct_decl.fields.at(i);
TypeEnumField *type_enum_field = &enum_type->data.enumeration.fields[i];
type_enum_field->name = &field_node->data.struct_field.name;
TypeTableEntry *field_type = analyze_type_expr(g, import, import->block_context,
TypeTableEntry *field_type = analyze_type_expr(g, import, context,
field_node->data.struct_field.type);
type_enum_field->type_entry = field_type;
type_enum_field->value = i;
@ -1362,12 +1364,14 @@ static void resolve_struct_type(CodeGen *g, ImportTableEntry *import, TypeTableE
// this field should be set to true only during the recursive calls to resolve_struct_type
struct_type->data.structure.embedded_in_current = true;
BlockContext *context = struct_type->data.structure.block_context;
int gen_field_index = 0;
for (int i = 0; i < field_count; i += 1) {
AstNode *field_node = decl_node->data.struct_decl.fields.at(i);
TypeStructField *type_struct_field = &struct_type->data.structure.fields[i];
type_struct_field->name = &field_node->data.struct_field.name;
TypeTableEntry *field_type = analyze_type_expr(g, import, import->block_context,
TypeTableEntry *field_type = analyze_type_expr(g, import, context,
field_node->data.struct_field.type);
type_struct_field->type_entry = field_type;
type_struct_field->src_index = i;
@ -1469,16 +1473,28 @@ static void get_fully_qualified_decl_name(Buf *buf, AstNode *decl_node, uint8_t
}
static void preview_generic_fn_proto(CodeGen *g, ImportTableEntry *import, AstNode *node) {
assert(node->type == NodeTypeFnProto);
if (node->type == NodeTypeFnProto) {
if (node->data.fn_proto.generic_params_is_var_args) {
add_node_error(g, node, buf_sprintf("generic parameters cannot be var args"));
node->data.fn_proto.skip = true;
node->data.fn_proto.generic_fn_type = g->builtin_types.entry_invalid;
return;
}
if (node->data.fn_proto.generic_params_is_var_args) {
add_node_error(g, node, buf_sprintf("generic parameters cannot be var args"));
node->data.fn_proto.skip = true;
node->data.fn_proto.generic_fn_type = g->builtin_types.entry_invalid;
return;
node->data.fn_proto.generic_fn_type = get_generic_fn_type(g, node);
} else if (node->type == NodeTypeStructDecl) {
if (node->data.struct_decl.generic_params_is_var_args) {
add_node_error(g, node, buf_sprintf("generic parameters cannot be var args"));
node->data.struct_decl.skip = true;
node->data.struct_decl.generic_fn_type = g->builtin_types.entry_invalid;
return;
}
node->data.struct_decl.generic_fn_type = get_generic_fn_type(g, node);
} else {
zig_unreachable();
}
node->data.fn_proto.generic_fn_type = get_generic_fn_type(g, node);
}
static void preview_fn_proto_instance(CodeGen *g, ImportTableEntry *import, AstNode *proto_node,
@ -1538,6 +1554,50 @@ static void preview_fn_proto(CodeGen *g, ImportTableEntry *import, AstNode *prot
}
static void scan_struct_decl(CodeGen *g, ImportTableEntry *import, BlockContext *context, AstNode *node) {
assert(node->type == NodeTypeStructDecl);
Buf *name = &node->data.struct_decl.name;
TypeTableEntry *container_type = get_partial_container_type(g, import, context,
node->data.struct_decl.kind, node, buf_ptr(name));
node->data.struct_decl.type_entry = container_type;
// handle the member function definitions independently
for (int i = 0; i < node->data.struct_decl.fns.length; i += 1) {
AstNode *child_node = node->data.struct_decl.fns.at(i);
get_as_top_level_decl(child_node)->parent_decl = node;
BlockContext *child_context = get_container_block_context(container_type);
scan_decls(g, import, child_context, child_node);
}
}
static void resolve_struct_instance(CodeGen *g, ImportTableEntry *import, AstNode *node) {
TypeTableEntry *type_entry = node->data.struct_decl.type_entry;
assert(type_entry);
// struct/enum member fns will get resolved independently
switch (node->data.struct_decl.kind) {
case ContainerKindStruct:
resolve_struct_type(g, import, type_entry);
break;
case ContainerKindEnum:
resolve_enum_type(g, import, type_entry);
break;
case ContainerKindUnion:
resolve_union_type(g, import, type_entry);
break;
}
}
static void resolve_struct_decl(CodeGen *g, ImportTableEntry *import, AstNode *node) {
if (node->data.struct_decl.generic_params.length > 0) {
return preview_generic_fn_proto(g, import, node);
} else {
return resolve_struct_instance(g, import, node);
}
}
static void preview_error_value_decl(CodeGen *g, AstNode *node) {
assert(node->type == NodeTypeErrorValueDecl);
@ -1587,25 +1647,8 @@ static void resolve_top_level_decl(CodeGen *g, AstNode *node, bool pointer_only)
preview_fn_proto(g, import, node);
break;
case NodeTypeStructDecl:
{
TypeTableEntry *type_entry = node->data.struct_decl.type_entry;
// struct/enum member fns will get resolved independently
switch (node->data.struct_decl.kind) {
case ContainerKindStruct:
resolve_struct_type(g, import, type_entry);
break;
case ContainerKindEnum:
resolve_enum_type(g, import, type_entry);
break;
case ContainerKindUnion:
resolve_union_type(g, import, type_entry);
break;
}
break;
}
resolve_struct_decl(g, import, node);
break;
case NodeTypeVariableDeclaration:
{
AstNodeVariableDeclaration *variable_declaration = &node->data.variable_declaration;
@ -2729,6 +2772,7 @@ static TypeTableEntry *resolve_expr_const_val_as_generic_fn(CodeGen *g, AstNode
return type_entry;
}
static TypeTableEntry *resolve_expr_const_val_as_err(CodeGen *g, AstNode *node, ErrorTableEntry *err) {
Expr *expr = get_resolved_expr(node);
expr->const_val.ok = true;
@ -2888,7 +2932,13 @@ static TypeTableEntry *analyze_decl_ref(CodeGen *g, AstNode *source_node, AstNod
return resolve_expr_const_val_as_fn(g, source_node, fn_entry);
}
} else if (decl_node->type == NodeTypeStructDecl) {
return resolve_expr_const_val_as_type(g, source_node, decl_node->data.struct_decl.type_entry);
if (decl_node->data.struct_decl.generic_params.length > 0) {
TypeTableEntry *type_entry = decl_node->data.struct_decl.generic_fn_type;
assert(type_entry);
return resolve_expr_const_val_as_generic_fn(g, source_node, type_entry);
} else {
return resolve_expr_const_val_as_type(g, source_node, decl_node->data.struct_decl.type_entry);
}
} else if (decl_node->type == NodeTypeTypeDecl) {
return resolve_expr_const_val_as_type(g, source_node, decl_node->data.type_decl.child_type_entry);
} else {
@ -5043,9 +5093,16 @@ static TypeTableEntry *analyze_generic_fn_call(CodeGen *g, ImportTableEntry *imp
assert(generic_fn_type->id == TypeTableEntryIdGenericFn);
AstNode *decl_node = generic_fn_type->data.generic_fn.decl_node;
assert(decl_node->type == NodeTypeFnProto);
ZigList<AstNode *> *generic_params;
if (decl_node->type == NodeTypeFnProto) {
generic_params = &decl_node->data.fn_proto.generic_params;
} else if (decl_node->type == NodeTypeStructDecl) {
generic_params = &decl_node->data.struct_decl.generic_params;
} else {
zig_unreachable();
}
int expected_param_count = decl_node->data.fn_proto.generic_params.length;
int expected_param_count = generic_params->length;
int actual_param_count = node->data.fn_call_expr.params.length;
if (actual_param_count != expected_param_count) {
@ -5061,7 +5118,7 @@ static TypeTableEntry *analyze_generic_fn_call(CodeGen *g, ImportTableEntry *imp
BlockContext *child_context = decl_node->owner->block_context;
for (int i = 0; i < actual_param_count; i += 1) {
AstNode *generic_param_decl_node = decl_node->data.fn_proto.generic_params.at(i);
AstNode *generic_param_decl_node = generic_params->at(i);
assert(generic_param_decl_node->type == NodeTypeParamDecl);
AstNode **generic_param_type_node = &generic_param_decl_node->data.param_decl.type;
@ -5104,24 +5161,36 @@ static TypeTableEntry *analyze_generic_fn_call(CodeGen *g, ImportTableEntry *imp
auto entry = g->generic_table.maybe_get(generic_fn_type_id);
if (entry) {
AstNode *impl_decl_node = entry->value;
assert(impl_decl_node->type == NodeTypeFnProto);
FnTableEntry *fn_table_entry = impl_decl_node->data.fn_proto.fn_table_entry;
return resolve_expr_const_val_as_fn(g, node, fn_table_entry);
if (impl_decl_node->type == NodeTypeFnProto) {
FnTableEntry *fn_table_entry = impl_decl_node->data.fn_proto.fn_table_entry;
return resolve_expr_const_val_as_fn(g, node, fn_table_entry);
} else if (impl_decl_node->type == NodeTypeStructDecl) {
TypeTableEntry *type_entry = impl_decl_node->data.struct_decl.type_entry;
return resolve_expr_const_val_as_type(g, node, type_entry);
} else {
zig_unreachable();
}
}
// make a type from the generic parameters supplied
assert(decl_node->type == NodeTypeFnProto);
AstNode *impl_fn_def_node = ast_clone_subtree(decl_node->data.fn_proto.fn_def_node, &g->next_node_index);
AstNode *impl_decl_node = impl_fn_def_node->data.fn_def.fn_proto;
if (decl_node->type == NodeTypeFnProto) {
AstNode *impl_fn_def_node = ast_clone_subtree(decl_node->data.fn_proto.fn_def_node, &g->next_node_index);
AstNode *impl_decl_node = impl_fn_def_node->data.fn_def.fn_proto;
preview_fn_proto_instance(g, import, impl_decl_node, child_context);
g->generic_table.put(generic_fn_type_id, impl_decl_node);
FnTableEntry *fn_table_entry = impl_decl_node->data.fn_proto.fn_table_entry;
return resolve_expr_const_val_as_fn(g, node, fn_table_entry);
preview_fn_proto_instance(g, import, impl_decl_node, child_context);
g->generic_table.put(generic_fn_type_id, impl_decl_node);
FnTableEntry *fn_table_entry = impl_decl_node->data.fn_proto.fn_table_entry;
return resolve_expr_const_val_as_fn(g, node, fn_table_entry);
} else if (decl_node->type == NodeTypeStructDecl) {
AstNode *impl_decl_node = ast_clone_subtree(decl_node, &g->next_node_index);
g->generic_table.put(generic_fn_type_id, impl_decl_node);
scan_struct_decl(g, import, child_context, impl_decl_node);
TypeTableEntry *type_entry = impl_decl_node->data.struct_decl.type_entry;
resolve_struct_type(g, import, type_entry);
return resolve_expr_const_val_as_type(g, node, type_entry);
} else {
zig_unreachable();
}
}
static TypeTableEntry *analyze_fn_call_expr(CodeGen *g, ImportTableEntry *import, BlockContext *context,
@ -6065,7 +6134,8 @@ static void add_top_level_decl(CodeGen *g, ImportTableEntry *import, BlockContex
tld->name = name;
bool want_as_export = (g->check_unused || g->is_test_build || tld->visib_mod == VisibModExport);
bool is_generic = (node->type == NodeTypeFnProto && node->data.fn_proto.generic_params.length > 0);
bool is_generic = (node->type == NodeTypeFnProto && node->data.fn_proto.generic_params.length > 0) ||
(node->type == NodeTypeStructDecl && node->data.struct_decl.generic_params.length > 0);
if (!is_generic && want_as_export) {
g->export_queue.append(node);
}
@ -6093,21 +6163,12 @@ static void scan_decls(CodeGen *g, ImportTableEntry *import, BlockContext *conte
case NodeTypeStructDecl:
{
Buf *name = &node->data.struct_decl.name;
TypeTableEntry *container_type = get_partial_container_type(g, import,
node->data.struct_decl.kind, node, buf_ptr(name));
node->data.struct_decl.type_entry = container_type;
add_top_level_decl(g, import, context, node, name);
// handle the member function definitions independently
for (int i = 0; i < node->data.struct_decl.fns.length; i += 1) {
AstNode *child_node = node->data.struct_decl.fns.at(i);
get_as_top_level_decl(child_node)->parent_decl = node;
BlockContext *child_context = get_container_block_context(container_type);
scan_decls(g, import, child_context, child_node);
if (node->data.struct_decl.generic_params.length == 0) {
scan_struct_decl(g, import, context, node);
}
break;
}
break;
case NodeTypeFnDef:
node->data.fn_def.fn_proto->data.fn_proto.fn_def_node = node;
scan_decls(g, import, context, node->data.fn_def.fn_proto);

2
src/analyze.hpp
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@ -27,7 +27,7 @@ TypeTableEntry *get_fn_type(CodeGen *g, FnTypeId *fn_type_id);
TypeTableEntry *get_maybe_type(CodeGen *g, TypeTableEntry *child_type);
TypeTableEntry *get_array_type(CodeGen *g, TypeTableEntry *child_type, uint64_t array_size);
TypeTableEntry *get_slice_type(CodeGen *g, TypeTableEntry *child_type, bool is_const);
TypeTableEntry *get_partial_container_type(CodeGen *g, ImportTableEntry *import,
TypeTableEntry *get_partial_container_type(CodeGen *g, ImportTableEntry *import, BlockContext *context,
ContainerKind kind, AstNode *decl_node, const char *name);
TypeTableEntry *get_smallest_unsigned_int_type(CodeGen *g, uint64_t x);
bool handle_is_ptr(TypeTableEntry *type_entry);

4
src/parseh.cpp
View File

@ -801,6 +801,7 @@ static TypeTableEntry *resolve_enum_decl(Context *c, const EnumDecl *enum_decl)
const EnumDecl *enum_def = enum_decl->getDefinition();
if (!enum_def) {
TypeTableEntry *enum_type = get_partial_container_type(c->codegen, c->import,
c->import->block_context,
ContainerKindEnum, c->source_node, buf_ptr(full_type_name));
c->enum_type_table.put(bare_name, enum_type);
c->decl_table.put(enum_decl, enum_type);
@ -825,6 +826,7 @@ static TypeTableEntry *resolve_enum_decl(Context *c, const EnumDecl *enum_decl)
if (pure_enum) {
TypeTableEntry *enum_type = get_partial_container_type(c->codegen, c->import,
c->import->block_context,
ContainerKindEnum, c->source_node, buf_ptr(full_type_name));
c->enum_type_table.put(bare_name, enum_type);
c->decl_table.put(enum_decl, enum_type);
@ -985,7 +987,7 @@ static TypeTableEntry *resolve_record_decl(Context *c, const RecordDecl *record_
TypeTableEntry *struct_type = get_partial_container_type(c->codegen, c->import,
ContainerKindStruct, c->source_node, buf_ptr(full_type_name));
c->import->block_context, ContainerKindStruct, c->source_node, buf_ptr(full_type_name));
c->struct_type_table.put(bare_name, struct_type);
c->decl_table.put(record_decl, struct_type);

17
src/parser.cpp
View File

@ -762,9 +762,7 @@ static void ast_parse_param_decl_list(ParseContext *pc, int *token_index,
{
*is_var_args = false;
Token *l_paren = &pc->tokens->at(*token_index);
*token_index += 1;
ast_expect_token(pc, l_paren, TokenIdLParen);
ast_eat_token(pc, token_index, TokenIdLParen);
Token *token = &pc->tokens->at(*token_index);
if (token->id == TokenIdRParen) {
@ -2606,7 +2604,7 @@ static AstNode *ast_parse_use(ParseContext *pc, int *token_index,
}
/*
ContainerDecl = ("struct" | "enum" | "union") "Symbol" "{" many(StructMember) "}"
ContainerDecl = ("struct" | "enum" | "union") "Symbol" option(ParamDeclList) "{" many(StructMember) "}"
StructMember: many(Directive) option(VisibleMod) (StructField | FnDef)
StructField : "Symbol" option(":" Expression) ",")
*/
@ -2636,7 +2634,16 @@ static AstNode *ast_parse_container_decl(ParseContext *pc, int *token_index,
node->data.struct_decl.top_level_decl.visib_mod = visib_mod;
node->data.struct_decl.top_level_decl.directives = directives;
ast_eat_token(pc, token_index, TokenIdLBrace);
Token *paren_or_brace = &pc->tokens->at(*token_index);
if (paren_or_brace->id == TokenIdLParen) {
ast_parse_param_decl_list(pc, token_index, &node->data.struct_decl.generic_params,
&node->data.struct_decl.generic_params_is_var_args);
ast_eat_token(pc, token_index, TokenIdLBrace);
} else if (paren_or_brace->id == TokenIdLBrace) {
*token_index += 1;
} else {
ast_invalid_token_error(pc, paren_or_brace);
}
for (;;) {
Token *directive_token = &pc->tokens->at(*token_index);

12
test/self_hosted.zig
View File

@ -1566,3 +1566,15 @@ fn c_string_concatenation() {
assert(a[len] == 0);
assert(b[len] == 0);
}
#attribute("test")
fn generic_struct() {
var a1 = GenNode(i32) {.value = 13, .next = null,};
var b1 = GenNode(bool) {.value = true, .next = null,};
assert(a1.value == 13);
assert(b1.value);
}
struct GenNode(T: type) {
value: T,
next: ?&GenNode(T),
}