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parseh correctly handles C's void type

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This commit is contained in:
Andrew Kelley 2016-01-27 16:30:52 -07:00
parent 75cab48c1e
commit d1ac1abd34
3 changed files with 57 additions and 13 deletions
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1
src/all_types.hpp
View File

@ -242,6 +242,7 @@ struct AstNodeReturnExpr {
struct AstNodeVariableDeclaration {
Buf symbol;
bool is_const;
bool is_extern;
VisibMod visib_mod;
// one or both of type and expr will be non null
AstNode *type;

39
src/main.cpp
View File

@ -170,12 +170,12 @@ static void print_indent(ParseHPrint *p) {
}
}
static Buf *type_node_to_name(AstNode *type_node) {
if (type_node->type == NodeTypeSymbol) {
return &type_node->data.symbol_expr.symbol;
} else if (type_node->type == NodeTypePrefixOpExpr) {
PrefixOp op = type_node->data.prefix_op_expr.prefix_op;
const char *child_type_str = buf_ptr(type_node_to_name(type_node->data.prefix_op_expr.primary_expr));
static Buf *node_to_buf(AstNode *node) {
if (node->type == NodeTypeSymbol) {
return &node->data.symbol_expr.symbol;
} else if (node->type == NodeTypePrefixOpExpr) {
PrefixOp op = node->data.prefix_op_expr.prefix_op;
const char *child_type_str = buf_ptr(node_to_buf(node->data.prefix_op_expr.primary_expr));
if (op == PrefixOpAddressOf) {
return buf_sprintf("&%s", child_type_str);
} else if (op == PrefixOpConstAddressOf) {
@ -242,6 +242,24 @@ static int parseh(const char *arg0, int argc, char **argv) {
return EXIT_FAILURE;
}
for (int var_i = 0; var_i < p->parse_h.var_list.length; var_i += 1) {
AstNode *var_decl = p->parse_h.var_list.at(var_i);
assert(var_decl->type == NodeTypeVariableDeclaration);
const char *pub_str = (var_decl->data.variable_declaration.visib_mod == VisibModPub) ? "pub " : "";
const char *extern_str = var_decl->data.variable_declaration.is_extern ? "extern " : "";
const char *var_name = buf_ptr(&var_decl->data.variable_declaration.symbol);
const char *const_or_var = var_decl->data.variable_declaration.is_const ? "const" : "var";
print_indent(p);
fprintf(p->f, "%s%s%s %s", pub_str, extern_str, const_or_var, var_name);
if (var_decl->data.variable_declaration.type) {
fprintf(p->f, ": %s", buf_ptr(node_to_buf(var_decl->data.variable_declaration.type)));
}
if (var_decl->data.variable_declaration.expr) {
fprintf(p->f, " = %s", buf_ptr(node_to_buf(var_decl->data.variable_declaration.expr)));
}
fprintf(p->f, ";\n");
}
for (int struct_i = 0; struct_i < p->parse_h.struct_list.length; struct_i += 1) {
AstNode *struct_decl = p->parse_h.struct_list.at(struct_i);
assert(struct_decl->type == NodeTypeStructDecl);
@ -253,7 +271,7 @@ static int parseh(const char *arg0, int argc, char **argv) {
AstNode *field_node = struct_decl->data.struct_decl.fields.at(field_i);
assert(field_node->type == NodeTypeStructField);
const char *field_name = buf_ptr(&field_node->data.struct_field.name);
Buf *type_name = type_node_to_name(field_node->data.struct_field.type);
Buf *type_name = node_to_buf(field_node->data.struct_field.type);
print_indent(p);
fprintf(p->f, "%s: %s,\n", field_name, buf_ptr(type_name));
}
@ -268,14 +286,15 @@ static int parseh(const char *arg0, int argc, char **argv) {
print_indent(p);
const char *fn_name = buf_ptr(&fn_proto->data.fn_proto.name);
const char *pub_str = (fn_proto->data.fn_proto.visib_mod == VisibModPub) ? "pub " : "";
fprintf(p->f, "%sextern fn %s(", pub_str, fn_name);
const char *extern_str = fn_proto->data.fn_proto.is_extern ? "extern " : "";
fprintf(p->f, "%s%sfn %s(", pub_str, extern_str, fn_name);
int arg_count = fn_proto->data.fn_proto.params.length;
bool is_var_args = fn_proto->data.fn_proto.is_var_args;
for (int arg_i = 0; arg_i < arg_count; arg_i += 1) {
AstNode *param_decl = fn_proto->data.fn_proto.params.at(arg_i);
assert(param_decl->type == NodeTypeParamDecl);
const char *arg_name = buf_ptr(&param_decl->data.param_decl.name);
Buf *arg_type = type_node_to_name(param_decl->data.param_decl.type);
Buf *arg_type = node_to_buf(param_decl->data.param_decl.type);
const char *noalias_str = param_decl->data.param_decl.is_noalias ? "noalias " : "";
fprintf(p->f, "%s%s: %s", noalias_str, arg_name, buf_ptr(arg_type));
if (arg_i + 1 < arg_count || is_var_args) {
@ -286,7 +305,7 @@ static int parseh(const char *arg0, int argc, char **argv) {
fprintf(p->f, "...");
}
fprintf(p->f, ")");
Buf *return_type_name = type_node_to_name(fn_proto->data.fn_proto.return_type);
Buf *return_type_name = node_to_buf(fn_proto->data.fn_proto.return_type);
if (!buf_eql_str(return_type_name, "void")) {
fprintf(p->f, " -> %s", buf_ptr(return_type_name));
}

30
src/parseh.cpp
View File

@ -20,7 +20,8 @@ using namespace clang;
struct Context {
ParseH *parse_h;
bool warnings_on;
bool pub;
VisibMod visib_mod;
AstNode *c_void_decl_node;
};
static AstNode *type_node_from_qual_type(Context *c, QualType qt);
@ -42,10 +43,33 @@ static const char *decl_name(const Decl *decl) {
return (const char *)named_decl->getName().bytes_begin();
}
static AstNode *create_typedef_node(Context *c, const char *new_name, const char *target_name) {
AstNode *node = create_node(c, NodeTypeVariableDeclaration);
buf_init_from_str(&node->data.variable_declaration.symbol, new_name);
node->data.variable_declaration.is_const = true;
node->data.variable_declaration.visib_mod = c->visib_mod;
node->data.variable_declaration.expr = simple_type_node(c, target_name);
return node;
}
static AstNode *convert_to_c_void(Context *c, AstNode *type_node) {
if (type_node->type == NodeTypeSymbol &&
buf_eql_str(&type_node->data.symbol_expr.symbol, "void"))
{
if (!c->c_void_decl_node) {
c->c_void_decl_node = create_typedef_node(c, "c_void", "u8");
c->parse_h->var_list.append(c->c_void_decl_node);
}
return simple_type_node(c, "c_void");
} else {
return type_node;
}
}
static AstNode *pointer_to_type(Context *c, AstNode *type_node, bool is_const) {
AstNode *node = create_node(c, NodeTypePrefixOpExpr);
node->data.prefix_op_expr.prefix_op = is_const ? PrefixOpConstAddressOf : PrefixOpAddressOf;
node->data.prefix_op_expr.primary_expr = type_node;
node->data.prefix_op_expr.primary_expr = convert_to_c_void(c, type_node);
return node;
}
@ -187,7 +211,7 @@ static bool decl_visitor(void *context, const Decl *decl) {
const FunctionDecl *fn_decl = static_cast<const FunctionDecl*>(decl);
AstNode *node = create_node(c, NodeTypeFnProto);
node->data.fn_proto.is_extern = true;
node->data.fn_proto.visib_mod = c->pub ? VisibModPub : VisibModPrivate;
node->data.fn_proto.visib_mod = c->visib_mod;
node->data.fn_proto.is_var_args = fn_decl->isVariadic();
buf_init_from_str(&node->data.fn_proto.name, decl_name(decl));