class RubyVM::AbstractSyntaxTree::Node
RubyVM::AbstractSyntaxTree::Node
instances are created by parse methods in RubyVM::AbstractSyntaxTree
.
Public Instance Methods
static VALUE rb_ast_node_children(VALUE self) { struct ASTNodeData *data; TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data); return node_children(data->ast, data->node); }
Returns AST nodes under this one. Each kind of node has different children, depending on what kind of node it is.
The returned array may contain other nodes or nil
.
static VALUE rb_ast_node_first_column(VALUE self) { struct ASTNodeData *data; TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data); return INT2NUM(nd_first_column(data->node)); }
The column number in the source code where this AST's text began.
static VALUE rb_ast_node_first_lineno(VALUE self) { struct ASTNodeData *data; TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data); return INT2NUM(nd_first_lineno(data->node)); }
The line number in the source code where this AST's text began.
static VALUE rb_ast_node_inspect(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; }
Returns debugging information about this node as a string.
static VALUE rb_ast_node_last_column(VALUE self) { struct ASTNodeData *data; TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data); return INT2NUM(nd_last_column(data->node)); }
The column number in the source code where this AST's text ended.
static VALUE rb_ast_node_last_lineno(VALUE self) { struct ASTNodeData *data; TypedData_Get_Struct(self, struct ASTNodeData, &rb_node_type, data); return INT2NUM(nd_last_lineno(data->node)); }
The line number in the source code where this AST's text ended.
# File lib/pp.rb, line 531 def pretty_print(q) q.group(1, "(#{type}@#{first_lineno}:#{first_column}-#{last_lineno}:#{last_column}", ")") { case type when :SCOPE pretty_print_children(q, %w"tbl args body") when :ARGS pretty_print_children(q, %w[pre_num pre_init opt first_post post_num post_init rest kw kwrest block]) when :DEFN pretty_print_children(q, %w[mid body]) else pretty_print_children(q) end } end
# File lib/pp.rb, line 518 def pretty_print_children(q, names = []) children.zip(names) do |c, n| if n q.breakable q.text "#{n}:" end q.group(2) do q.breakable q.pp c end end end
static VALUE rb_ast_node_type(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)); }
Returns the type of this node as a symbol.
root = RubyVM::AbstractSyntaxTree.parse("x = 1 + 2") root.type # => :SCOPE call = root.children[2] call.type # => :OPCALL
Ruby Core © 1993–2017 Yukihiro Matsumoto
Licensed under the Ruby License.
Ruby Standard Library © contributors
Licensed under their own licenses.