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ruby--ruby/ast.c
eileencodes 3391c51eff Add node_id_for_backtrace_location function 
We want to use error highlight with eval'd code, specifically ERB
templates. We're able to recover the generated code for eval'd templates
and can get a parse tree for the ERB generated code, but we don't have a
way to get the node id from the backtrace location. So we can't pass the
right node into error highlight.

This patch gives us an API to get the node id from the backtrace
location so we can find the node in the AST.

Error Highlight PR: https://github.com/ruby/error_highlight/pull/26

Co-authored-by: Aaron Patterson <tenderlove@ruby-lang.org>
2022-10-31 13:39:56 +09:00

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/* indent-tabs-mode: nil */
#include "internal.h"
#include "internal/parse.h"
#include "internal/symbol.h"
#include "internal/warnings.h"
#include "iseq.h"
#include "node.h"
#include "ruby.h"
#include "ruby/encoding.h"
#include "ruby/util.h"
#include "vm_core.h"
#include "builtin.h"
static VALUE rb_mAST;
static VALUE rb_cNode;
struct ASTNodeData {
rb_ast_t *ast;
const NODE *node;
};
static void
node_gc_mark(void *ptr)
{
struct ASTNodeData *data = (struct ASTNodeData *)ptr;
rb_gc_mark((VALUE)data->ast);
}
static size_t
node_memsize(const void *ptr)
{
struct ASTNodeData *data = (struct ASTNodeData *)ptr;
return rb_ast_memsize(data->ast);
}
static const rb_data_type_t rb_node_type = {
"AST/node",
{node_gc_mark, RUBY_TYPED_DEFAULT_FREE, node_memsize,},
0, 0,
RUBY_TYPED_FREE_IMMEDIATELY,
};
static VALUE rb_ast_node_alloc(VALUE klass);
static void
setup_node(VALUE obj, rb_ast_t *ast, const NODE *node)
{
struct ASTNodeData *data;
TypedData_Get_Struct(obj, struct ASTNodeData, &rb_node_type, data);
data->ast = ast;
data->node = node;
}
static VALUE
ast_new_internal(rb_ast_t *ast, const NODE *node)
{
VALUE obj;
obj = rb_ast_node_alloc(rb_cNode);
setup_node(obj, ast, node);
return obj;
}
static VALUE rb_ast_parse_str(VALUE str, VALUE keep_script_lines, VALUE error_tolerant);
static VALUE rb_ast_parse_file(VALUE path, VALUE keep_script_lines, VALUE error_tolerant);
static VALUE
ast_parse_new(void)
{
return rb_parser_set_context(rb_parser_new(), NULL, 0);
}
static VALUE
ast_parse_done(rb_ast_t *ast)
{
if (!ast->body.root) {
rb_ast_dispose(ast);
rb_exc_raise(GET_EC()->errinfo);
}
return ast_new_internal(ast, (NODE *)ast->body.root);
}
static VALUE
ast_s_parse(rb_execution_context_t *ec, VALUE module, VALUE str, VALUE keep_script_lines, VALUE error_tolerant)
{
return rb_ast_parse_str(str, keep_script_lines, error_tolerant);
}
static VALUE
rb_ast_parse_str(VALUE str, VALUE keep_script_lines, VALUE error_tolerant)
{
rb_ast_t *ast = 0;
StringValue(str);
VALUE vparser = ast_parse_new();
if (RTEST(keep_script_lines)) rb_parser_keep_script_lines(vparser);
if (RTEST(error_tolerant)) rb_parser_error_tolerant(vparser);
ast = rb_parser_compile_string_path(vparser, Qnil, str, 1);
return ast_parse_done(ast);
}
static VALUE
ast_s_parse_file(rb_execution_context_t *ec, VALUE module, VALUE path, VALUE keep_script_lines, VALUE error_tolerant)
{
return rb_ast_parse_file(path, keep_script_lines, error_tolerant);
}
static VALUE
rb_ast_parse_file(VALUE path, VALUE keep_script_lines, VALUE error_tolerant)
{
VALUE f;
rb_ast_t *ast = 0;
rb_encoding *enc = rb_utf8_encoding();
FilePathValue(path);
f = rb_file_open_str(path, "r");
rb_funcall(f, rb_intern("set_encoding"), 2, rb_enc_from_encoding(enc), rb_str_new_cstr("-"));
VALUE vparser = ast_parse_new();
if (RTEST(keep_script_lines)) rb_parser_keep_script_lines(vparser);
if (RTEST(error_tolerant)) rb_parser_error_tolerant(vparser);
ast = rb_parser_compile_file_path(vparser, Qnil, f, 1);
rb_io_close(f);
return ast_parse_done(ast);
}
static VALUE
lex_array(VALUE array, int index)
{
VALUE str = rb_ary_entry(array, index);
if (!NIL_P(str)) {
StringValue(str);
if (!rb_enc_asciicompat(rb_enc_get(str))) {
rb_raise(rb_eArgError, "invalid source encoding");
}
}
return str;
}
static VALUE
rb_ast_parse_array(VALUE array, VALUE keep_script_lines, VALUE error_tolerant)
{
rb_ast_t *ast = 0;
array = rb_check_array_type(array);
VALUE vparser = ast_parse_new();
if (RTEST(keep_script_lines)) rb_parser_keep_script_lines(vparser);
if (RTEST(error_tolerant)) rb_parser_error_tolerant(vparser);
ast = rb_parser_compile_generic(vparser, lex_array, Qnil, array, 1);
return ast_parse_done(ast);
}
static VALUE node_children(rb_ast_t*, const NODE*);
static VALUE
node_find(VALUE self, const int node_id)
{
VALUE ary;
long i;
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
if (nd_node_id(data->node) == node_id) return self;
ary = node_children(data->ast, data->node);
for (i = 0; i < RARRAY_LEN(ary); i++) {
VALUE child = RARRAY_AREF(ary, i);
if (CLASS_OF(child) == rb_cNode) {
VALUE result = node_find(child, node_id);
if (RTEST(result)) return result;
}
}
return Qnil;
}
extern VALUE rb_e_script;
static VALUE
script_lines(VALUE path)
{
VALUE hash, lines;
ID script_lines;
CONST_ID(script_lines, "SCRIPT_LINES__");
if (!rb_const_defined_at(rb_cObject, script_lines)) return Qnil;
hash = rb_const_get_at(rb_cObject, script_lines);
if (!RB_TYPE_P(hash, T_HASH)) return Qnil;
lines = rb_hash_lookup(hash, path);
if (!RB_TYPE_P(lines, T_ARRAY)) return Qnil;
return lines;
}
static VALUE
node_id_for_backtrace_location(rb_execution_context_t *ec, VALUE module, VALUE location)
{
int node_id;
node_id = rb_get_node_id_from_frame_info(location);
if (node_id == -1) {
return Qnil;
}
return INT2NUM(node_id);
}
static VALUE
ast_s_of(rb_execution_context_t *ec, VALUE module, VALUE body, VALUE keep_script_lines, VALUE error_tolerant)
{
VALUE node, lines = Qnil;
const rb_iseq_t *iseq;
int node_id;
if (rb_frame_info_p(body)) {
iseq = rb_get_iseq_from_frame_info(body);
node_id = rb_get_node_id_from_frame_info(body);
}
else {
iseq = NULL;
if (rb_obj_is_proc(body)) {
iseq = vm_proc_iseq(body);
if (!rb_obj_is_iseq((VALUE)iseq)) return Qnil;
}
else {
iseq = rb_method_iseq(body);
}
if (iseq) {
node_id = ISEQ_BODY(iseq)->location.node_id;
}
}
if (!iseq) {
return Qnil;
}
lines = ISEQ_BODY(iseq)->variable.script_lines;
VALUE path = rb_iseq_path(iseq);
int e_option = RSTRING_LEN(path) == 2 && memcmp(RSTRING_PTR(path), "-e", 2) == 0;
if (NIL_P(lines) && rb_iseq_from_eval_p(iseq) && !e_option) {
rb_raise(rb_eArgError, "cannot get AST for method defined in eval");
}
if (!NIL_P(lines) || !NIL_P(lines = script_lines(path))) {
node = rb_ast_parse_array(lines, keep_script_lines, error_tolerant);
}
else if (e_option) {
node = rb_ast_parse_str(rb_e_script, keep_script_lines, error_tolerant);
}
else {
node = rb_ast_parse_file(path, keep_script_lines, error_tolerant);
}
return node_find(node, node_id);
}
static VALUE
rb_ast_node_alloc(VALUE klass)
{
struct ASTNodeData *data;
VALUE obj = TypedData_Make_Struct(klass, struct ASTNodeData, &rb_node_type, data);
return obj;
}
static const char*
node_type_to_str(const NODE *node)
{
return (ruby_node_name(nd_type(node)) + rb_strlen_lit("NODE_"));
}
static VALUE
ast_node_type(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
return rb_sym_intern_ascii_cstr(node_type_to_str(data->node));
}
static VALUE
ast_node_node_id(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
return INT2FIX(nd_node_id(data->node));
}
#define NEW_CHILD(ast, node) node ? ast_new_internal(ast, node) : Qnil
static VALUE
rb_ary_new_from_node_args(rb_ast_t *ast, long n, ...)
{
va_list ar;
VALUE ary;
long i;
ary = rb_ary_new2(n);
va_start(ar, n);
for (i=0; i<n; i++) {
NODE *node;
node = va_arg(ar, NODE *);
rb_ary_push(ary, NEW_CHILD(ast, node));
}
va_end(ar);
return ary;
}
static VALUE
dump_block(rb_ast_t *ast, const NODE *node)
{
VALUE ary = rb_ary_new();
do {
rb_ary_push(ary, NEW_CHILD(ast, node->nd_head));
} while (node->nd_next &&
nd_type_p(node->nd_next, NODE_BLOCK) &&
(node = node->nd_next, 1));
if (node->nd_next) {
rb_ary_push(ary, NEW_CHILD(ast, node->nd_next));
}
return ary;
}
static VALUE
dump_array(rb_ast_t *ast, const NODE *node)
{
VALUE ary = rb_ary_new();
rb_ary_push(ary, NEW_CHILD(ast, node->nd_head));
while (node->nd_next && nd_type_p(node->nd_next, NODE_LIST)) {
node = node->nd_next;
rb_ary_push(ary, NEW_CHILD(ast, node->nd_head));
}
rb_ary_push(ary, NEW_CHILD(ast, node->nd_next));
return ary;
}
static VALUE
var_name(ID id)
{
if (!id) return Qnil;
if (!rb_id2str(id)) return Qnil;
return ID2SYM(id);
}
static VALUE
no_name_rest(void)
{
ID rest;
CONST_ID(rest, "NODE_SPECIAL_NO_NAME_REST");
return ID2SYM(rest);
}
static VALUE
rest_arg(rb_ast_t *ast, const NODE *rest_arg)
{
return NODE_NAMED_REST_P(rest_arg) ? NEW_CHILD(ast, rest_arg) : no_name_rest();
}
static VALUE
node_children(rb_ast_t *ast, const NODE *node)
{
char name[DECIMAL_SIZE_OF_BITS(sizeof(long) * CHAR_BIT) + 2]; /* including '$' */
enum node_type type = nd_type(node);
switch (type) {
case NODE_BLOCK:
return dump_block(ast, node);
case NODE_IF:
return rb_ary_new_from_node_args(ast, 3, node->nd_cond, node->nd_body, node->nd_else);
case NODE_UNLESS:
return rb_ary_new_from_node_args(ast, 3, node->nd_cond, node->nd_body, node->nd_else);
case NODE_CASE:
return rb_ary_new_from_node_args(ast, 2, node->nd_head, node->nd_body);
case NODE_CASE2:
return rb_ary_new_from_node_args(ast, 2, node->nd_head, node->nd_body);
case NODE_CASE3:
return rb_ary_new_from_node_args(ast, 2, node->nd_head, node->nd_body);
case NODE_WHEN:
return rb_ary_new_from_node_args(ast, 3, node->nd_head, node->nd_body, node->nd_next);
case NODE_IN:
return rb_ary_new_from_node_args(ast, 3, node->nd_head, node->nd_body, node->nd_next);
case NODE_WHILE:
case NODE_UNTIL:
return rb_ary_push(rb_ary_new_from_node_args(ast, 2, node->nd_cond, node->nd_body),
RBOOL(node->nd_state));
case NODE_ITER:
case NODE_FOR:
return rb_ary_new_from_node_args(ast, 2, node->nd_iter, node->nd_body);
case NODE_FOR_MASGN:
return rb_ary_new_from_node_args(ast, 1, node->nd_var);
case NODE_BREAK:
case NODE_NEXT:
case NODE_RETURN:
return rb_ary_new_from_node_args(ast, 1, node->nd_stts);
case NODE_REDO:
return rb_ary_new_from_node_args(ast, 0);
case NODE_RETRY:
return rb_ary_new_from_node_args(ast, 0);
case NODE_BEGIN:
return rb_ary_new_from_node_args(ast, 1, node->nd_body);
case NODE_RESCUE:
return rb_ary_new_from_node_args(ast, 3, node->nd_head, node->nd_resq, node->nd_else);
case NODE_RESBODY:
return rb_ary_new_from_node_args(ast, 3, node->nd_args, node->nd_body, node->nd_head);
case NODE_ENSURE:
return rb_ary_new_from_node_args(ast, 2, node->nd_head, node->nd_ensr);
case NODE_AND:
case NODE_OR:
{
VALUE ary = rb_ary_new();
while (1) {
rb_ary_push(ary, NEW_CHILD(ast, node->nd_1st));
if (!node->nd_2nd || !nd_type_p(node->nd_2nd, type))
break;
node = node->nd_2nd;
}
rb_ary_push(ary, NEW_CHILD(ast, node->nd_2nd));
return ary;
}
case NODE_MASGN:
if (NODE_NAMED_REST_P(node->nd_args)) {
return rb_ary_new_from_node_args(ast, 3, node->nd_value, node->nd_head, node->nd_args);
}
else {
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_value),
NEW_CHILD(ast, node->nd_head),
no_name_rest());
}
case NODE_LASGN:
case NODE_DASGN:
case NODE_IASGN:
case NODE_CVASGN:
case NODE_GASGN:
if (NODE_REQUIRED_KEYWORD_P(node)) {
return rb_ary_new_from_args(2, var_name(node->nd_vid), ID2SYM(rb_intern("NODE_SPECIAL_REQUIRED_KEYWORD")));
}
return rb_ary_new_from_args(2, var_name(node->nd_vid), NEW_CHILD(ast, node->nd_value));
case NODE_CDECL:
if (node->nd_vid) {
return rb_ary_new_from_args(2, ID2SYM(node->nd_vid), NEW_CHILD(ast, node->nd_value));
}
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_else), ID2SYM(node->nd_else->nd_mid), NEW_CHILD(ast, node->nd_value));
case NODE_OP_ASGN1:
return rb_ary_new_from_args(4, NEW_CHILD(ast, node->nd_recv),
ID2SYM(node->nd_mid),
NEW_CHILD(ast, node->nd_args->nd_head),
NEW_CHILD(ast, node->nd_args->nd_body));
case NODE_OP_ASGN2:
return rb_ary_new_from_args(5, NEW_CHILD(ast, node->nd_recv),
RBOOL(node->nd_next->nd_aid),
ID2SYM(node->nd_next->nd_vid),
ID2SYM(node->nd_next->nd_mid),
NEW_CHILD(ast, node->nd_value));
case NODE_OP_ASGN_AND:
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_head), ID2SYM(idANDOP),
NEW_CHILD(ast, node->nd_value));
case NODE_OP_ASGN_OR:
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_head), ID2SYM(idOROP),
NEW_CHILD(ast, node->nd_value));
case NODE_OP_CDECL:
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_head),
ID2SYM(node->nd_aid),
NEW_CHILD(ast, node->nd_value));
case NODE_CALL:
case NODE_OPCALL:
case NODE_QCALL:
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_recv),
ID2SYM(node->nd_mid),
NEW_CHILD(ast, node->nd_args));
case NODE_FCALL:
return rb_ary_new_from_args(2, ID2SYM(node->nd_mid),
NEW_CHILD(ast, node->nd_args));
case NODE_VCALL:
return rb_ary_new_from_args(1, ID2SYM(node->nd_mid));
case NODE_SUPER:
return rb_ary_new_from_node_args(ast, 1, node->nd_args);
case NODE_ZSUPER:
return rb_ary_new_from_node_args(ast, 0);
case NODE_LIST:
case NODE_VALUES:
return dump_array(ast, node);
case NODE_ZLIST:
return rb_ary_new_from_node_args(ast, 0);
case NODE_HASH:
return rb_ary_new_from_node_args(ast, 1, node->nd_head);
case NODE_YIELD:
return rb_ary_new_from_node_args(ast, 1, node->nd_head);
case NODE_LVAR:
case NODE_DVAR:
return rb_ary_new_from_args(1, var_name(node->nd_vid));
case NODE_IVAR:
case NODE_CONST:
case NODE_CVAR:
case NODE_GVAR:
return rb_ary_new_from_args(1, ID2SYM(node->nd_vid));
case NODE_NTH_REF:
snprintf(name, sizeof(name), "$%ld", node->nd_nth);
return rb_ary_new_from_args(1, ID2SYM(rb_intern(name)));
case NODE_BACK_REF:
name[0] = '$';
name[1] = (char)node->nd_nth;
name[2] = '\0';
return rb_ary_new_from_args(1, ID2SYM(rb_intern(name)));
case NODE_MATCH2:
if (node->nd_args) {
return rb_ary_new_from_node_args(ast, 3, node->nd_recv, node->nd_value, node->nd_args);
}
return rb_ary_new_from_node_args(ast, 2, node->nd_recv, node->nd_value);
case NODE_MATCH3:
return rb_ary_new_from_node_args(ast, 2, node->nd_recv, node->nd_value);
case NODE_MATCH:
case NODE_LIT:
case NODE_STR:
case NODE_XSTR:
return rb_ary_new_from_args(1, node->nd_lit);
case NODE_ONCE:
return rb_ary_new_from_node_args(ast, 1, node->nd_body);
case NODE_DSTR:
case NODE_DXSTR:
case NODE_DREGX:
case NODE_DSYM:
{
NODE *n = node->nd_next;
VALUE head = Qnil, next = Qnil;
if (n) {
head = NEW_CHILD(ast, n->nd_head);
next = NEW_CHILD(ast, n->nd_next);
}
return rb_ary_new_from_args(3, node->nd_lit, head, next);
}
case NODE_EVSTR:
return rb_ary_new_from_node_args(ast, 1, node->nd_body);
case NODE_ARGSCAT:
return rb_ary_new_from_node_args(ast, 2, node->nd_head, node->nd_body);
case NODE_ARGSPUSH:
return rb_ary_new_from_node_args(ast, 2, node->nd_head, node->nd_body);
case NODE_SPLAT:
return rb_ary_new_from_node_args(ast, 1, node->nd_head);
case NODE_BLOCK_PASS:
return rb_ary_new_from_node_args(ast, 2, node->nd_head, node->nd_body);
case NODE_DEFN:
return rb_ary_new_from_args(2, ID2SYM(node->nd_mid), NEW_CHILD(ast, node->nd_defn));
case NODE_DEFS:
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_recv), ID2SYM(node->nd_mid), NEW_CHILD(ast, node->nd_defn));
case NODE_ALIAS:
return rb_ary_new_from_node_args(ast, 2, node->nd_1st, node->nd_2nd);
case NODE_VALIAS:
return rb_ary_new_from_args(2, ID2SYM(node->nd_alias), ID2SYM(node->nd_orig));
case NODE_UNDEF:
return rb_ary_new_from_node_args(ast, 1, node->nd_undef);
case NODE_CLASS:
return rb_ary_new_from_node_args(ast, 3, node->nd_cpath, node->nd_super, node->nd_body);
case NODE_MODULE:
return rb_ary_new_from_node_args(ast, 2, node->nd_cpath, node->nd_body);
case NODE_SCLASS:
return rb_ary_new_from_node_args(ast, 2, node->nd_recv, node->nd_body);
case NODE_COLON2:
return rb_ary_new_from_args(2, NEW_CHILD(ast, node->nd_head), ID2SYM(node->nd_mid));
case NODE_COLON3:
return rb_ary_new_from_args(1, ID2SYM(node->nd_mid));
case NODE_DOT2:
case NODE_DOT3:
case NODE_FLIP2:
case NODE_FLIP3:
return rb_ary_new_from_node_args(ast, 2, node->nd_beg, node->nd_end);
case NODE_SELF:
return rb_ary_new_from_node_args(ast, 0);
case NODE_NIL:
return rb_ary_new_from_node_args(ast, 0);
case NODE_TRUE:
return rb_ary_new_from_node_args(ast, 0);
case NODE_FALSE:
return rb_ary_new_from_node_args(ast, 0);
case NODE_ERRINFO:
return rb_ary_new_from_node_args(ast, 0);
case NODE_DEFINED:
return rb_ary_new_from_node_args(ast, 1, node->nd_head);
case NODE_POSTEXE:
return rb_ary_new_from_node_args(ast, 1, node->nd_body);
case NODE_ATTRASGN:
return rb_ary_new_from_args(3, NEW_CHILD(ast, node->nd_recv), ID2SYM(node->nd_mid), NEW_CHILD(ast, node->nd_args));
case NODE_LAMBDA:
return rb_ary_new_from_node_args(ast, 1, node->nd_body);
case NODE_OPT_ARG:
return rb_ary_new_from_node_args(ast, 2, node->nd_body, node->nd_next);
case NODE_KW_ARG:
return rb_ary_new_from_node_args(ast, 2, node->nd_body, node->nd_next);
case NODE_POSTARG:
if (NODE_NAMED_REST_P(node->nd_1st)) {
return rb_ary_new_from_node_args(ast, 2, node->nd_1st, node->nd_2nd);
}
return rb_ary_new_from_args(2, no_name_rest(),
NEW_CHILD(ast, node->nd_2nd));
case NODE_ARGS:
{
struct rb_args_info *ainfo = node->nd_ainfo;
return rb_ary_new_from_args(10,
INT2NUM(ainfo->pre_args_num),
NEW_CHILD(ast, ainfo->pre_init),
NEW_CHILD(ast, ainfo->opt_args),
var_name(ainfo->first_post_arg),
INT2NUM(ainfo->post_args_num),
NEW_CHILD(ast, ainfo->post_init),
(ainfo->rest_arg == NODE_SPECIAL_EXCESSIVE_COMMA
? ID2SYM(rb_intern("NODE_SPECIAL_EXCESSIVE_COMMA"))
: var_name(ainfo->rest_arg)),
(ainfo->no_kwarg ? Qfalse : NEW_CHILD(ast, ainfo->kw_args)),
(ainfo->no_kwarg ? Qfalse : NEW_CHILD(ast, ainfo->kw_rest_arg)),
var_name(ainfo->block_arg));
}
case NODE_SCOPE:
{
rb_ast_id_table_t *tbl = node->nd_tbl;
int i, size = tbl ? tbl->size : 0;
VALUE locals = rb_ary_new_capa(size);
for (i = 0; i < size; i++) {
rb_ary_push(locals, var_name(tbl->ids[i]));
}
return rb_ary_new_from_args(3, locals, NEW_CHILD(ast, node->nd_args), NEW_CHILD(ast, node->nd_body));
}
case NODE_ARYPTN:
{
struct rb_ary_pattern_info *apinfo = node->nd_apinfo;
VALUE rest = rest_arg(ast, apinfo->rest_arg);
return rb_ary_new_from_args(4,
NEW_CHILD(ast, node->nd_pconst),
NEW_CHILD(ast, apinfo->pre_args),
rest,
NEW_CHILD(ast, apinfo->post_args));
}
case NODE_FNDPTN:
{
struct rb_fnd_pattern_info *fpinfo = node->nd_fpinfo;
VALUE pre_rest = rest_arg(ast, fpinfo->pre_rest_arg);
VALUE post_rest = rest_arg(ast, fpinfo->post_rest_arg);
return rb_ary_new_from_args(4,
NEW_CHILD(ast, node->nd_pconst),
pre_rest,
NEW_CHILD(ast, fpinfo->args),
post_rest);
}
case NODE_HSHPTN:
{
VALUE kwrest = node->nd_pkwrestarg == NODE_SPECIAL_NO_REST_KEYWORD ? ID2SYM(rb_intern("NODE_SPECIAL_NO_REST_KEYWORD")) :
NEW_CHILD(ast, node->nd_pkwrestarg);
return rb_ary_new_from_args(3,
NEW_CHILD(ast, node->nd_pconst),
NEW_CHILD(ast, node->nd_pkwargs),
kwrest);
}
case NODE_ERROR:
return rb_ary_new_from_node_args(ast, 0);
case NODE_ARGS_AUX:
case NODE_LAST:
break;
}
rb_bug("node_children: unknown node: %s", ruby_node_name(type));
}
static VALUE
ast_node_children(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
return node_children(data->ast, data->node);
}
static VALUE
ast_node_first_lineno(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
return INT2NUM(nd_first_lineno(data->node));
}
static VALUE
ast_node_first_column(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
return INT2NUM(nd_first_column(data->node));
}
static VALUE
ast_node_last_lineno(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
return INT2NUM(nd_last_lineno(data->node));
}
static VALUE
ast_node_last_column(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
return INT2NUM(nd_last_column(data->node));
}
static VALUE
ast_node_inspect(rb_execution_context_t *ec, VALUE self)
{
VALUE str;
VALUE cname;
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
cname = rb_class_path(rb_obj_class(self));
str = rb_str_new2("#<");
rb_str_append(str, cname);
rb_str_catf(str, ":%s@%d:%d-%d:%d>",
node_type_to_str(data->node),
nd_first_lineno(data->node), nd_first_column(data->node),
nd_last_lineno(data->node), nd_last_column(data->node));
return str;
}
static VALUE
ast_node_script_lines(rb_execution_context_t *ec, VALUE self)
{
struct ASTNodeData *data;
TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data);
VALUE ret = data->ast->body.script_lines;
if (!RB_TYPE_P(ret, T_ARRAY)) return Qnil;
return ret;
}
#include "ast.rbinc"
void
Init_ast(void)
{
rb_mAST = rb_define_module_under(rb_cRubyVM, "AbstractSyntaxTree");
rb_cNode = rb_define_class_under(rb_mAST, "Node", rb_cObject);
rb_undef_alloc_func(rb_cNode);
}
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