private import parser::tables
import mixin
import primitive_types
+private import model::serialize_model
redef class ToolContext
# --discover-call-trace
return self.modelbuilder.force_get_primitive_method(current_node, name, recv.mclass, self.mainmodule)
end
- # Is a return executed?
- # Set this mark to skip the evaluation until the end of the specified method frame
- var returnmark: nullable FRAME = null
-
- # Is a break or a continue executed?
+ # Is a return, a break or a continue executed?
# Set this mark to skip the evaluation until a labeled statement catch it with `is_escape`
var escapemark: nullable EscapeMark = null
+ # The count of `catch` blocs that have been encountered and can catch an abort
+ var catch_count = 0 is writable
+
+ # The last error thrown on abort/runtime error where catch_count > 0
+ var last_error: nullable FatalError = null
+
# Is a return or a break or a continue executed?
# Use this function to know if you must skip the evaluation of statements
- fun is_escaping: Bool do return returnmark != null or escapemark != null
+ fun is_escaping: Bool do return escapemark != null
# The value associated with the current return/break/continue, if any.
# Set the value when you set a escapemark.
end
end
- # Return a new native string initialized with `txt`
- fun native_string_instance(txt: String): Instance
+ # Return a new C string initialized with `txt`
+ fun c_string_instance(txt: String): Instance
+ do
+ var instance = c_string_instance_len(txt.byte_length+1)
+ var val = instance.val
+ val[txt.byte_length] = 0u8
+ txt.to_cstring.copy_to(val, txt.byte_length, 0, 0)
+
+ return instance
+ end
+
+ # Return a new C string initialized with `txt`
+ fun c_string_instance_from_ns(txt: CString, len: Int): Instance
do
- var instance = native_string_instance_len(txt.bytelen+1)
+ var instance = c_string_instance_len(len)
var val = instance.val
- val[txt.bytelen] = 0u8
- txt.to_cstring.copy_to(val, txt.bytelen, 0, 0)
+ txt.copy_to(val, len, 0, 0)
return instance
end
- # Return a new native string initialized of `length`
- fun native_string_instance_len(length: Int): PrimitiveInstance[NativeString]
+ # Return a new C string initialized of `length`
+ fun c_string_instance_len(length: Int): PrimitiveInstance[CString]
do
- var val = new NativeString(length)
+ var val = new CString(length)
- var t = mainmodule.native_string_type
- var instance = new PrimitiveInstance[NativeString](t, val)
+ var t = mainmodule.c_string_type
+ var instance = new PrimitiveInstance[CString](t, val)
init_instance_primitive(instance)
return instance
end
# Return a new String instance for `txt`
fun string_instance(txt: String): Instance
do
- var nat = native_string_instance(txt)
- var res = self.send(self.force_get_primitive_method("to_s_full", nat.mtype), [nat, self.int_instance(txt.bytelen), self.int_instance(txt.length)])
+ var nat = c_string_instance(txt)
+ var res = self.send(self.force_get_primitive_method("to_s_unsafe", nat.mtype), [nat, self.int_instance(txt.byte_length), self.int_instance(txt.length), self.false_instance, self.false_instance])
assert res != null
return res
end
var error_instance = new MutableInstance(modelbuilder.model.null_type) is lazy
end
+# A runtime error
+class FatalError
+ # The error message
+ var message: String
+
+ # The problematic node, if any
+ var node: nullable ANode
+end
+
# An instance represents a value of the executed program.
abstract class Instance
# The dynamic type of the instance
# ASSERT: not self.mtype.is_anchored
var mtype: MType
- # return true if the instance is the true value.
- # return false if the instance is the true value.
- # else aborts
+ # Return `true` if the instance is the `true` value.
+ #
+ # Return `false` if the instance is the `false` value.
+ # Abort if the instance is not a boolean value.
fun is_true: Bool do abort
# Return true if `self` IS `o` (using the Nit semantic of is)
end
# Special instance to handle primitives values (int, bool, etc.)
-# The trick it just to encapsulate the <<real>> value
+# The trick is just to encapsulate the “real” value.
class PrimitiveInstance[E]
super Instance
# `v` is used to know if a colored message is displayed or not
fun fatal(v: NaiveInterpreter, message: String)
do
+ # Abort if there is a `catch` block
+ if v.catch_count > 0 then
+ v.last_error = new FatalError(message, self)
+ abort
+ end
+
if v.modelbuilder.toolcontext.opt_no_color.value == true then
sys.stderr.write("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
else
var f = v.new_frame(self, mpropdef, args)
var res = call_commons(v, mpropdef, args, f)
v.frames.shift
- if v.returnmark == f then
- v.returnmark = null
+ if v.is_escape(self.return_mark) then
res = v.escapevalue
- v.escapevalue = null
return res
end
return res
else if pname == "native_class_name" then
var recv = args.first
var txt = recv.mtype.to_s
- return v.native_string_instance(txt)
+ return v.c_string_instance(txt)
else if pname == "==" then
# == is correctly redefined for instances
return v.bool_instance(args[0] == args[1])
return v.bool_instance(args[0].mtype == args[1].mtype)
else if pname == "is_same_instance" then
return v.bool_instance(args[0].eq_is(args[1]))
+ else if pname == "class_inheritance_metamodel_json" then
+ return v.c_string_instance(v.mainmodule.flatten_mclass_hierarchy.to_thin_json)
else if pname == "exit" then
exit(args[1].to_i)
abort
return v.bool_instance(recvval >= args[1].to_i)
else if pname == "<=>" then
return v.int_instance(recvval <=> args[1].to_i)
+ else if pname == "&" then
+ return v.int_instance(recvval & args[1].to_i)
+ else if pname == "|" then
+ return v.int_instance(recvval | args[1].to_i)
else if pname == "to_f" then
return v.float_instance(recvval.to_f)
else if pname == "to_b" then
return v.int32_instance(recvval.to_i32)
else if pname == "to_u32" then
return v.uint32_instance(recvval.to_u32)
- else if pname == "rand" then
- var res = recvval.rand
- return v.int_instance(res)
end
else if cname == "Byte" then
var recvval = args[0].to_b
return v.bool_instance(recvval >= args[1].to_b)
else if pname == "<=>" then
return v.int_instance(recvval <=> args[1].to_b)
+ else if pname == "&" then
+ return v.byte_instance(recvval & args[1].to_b)
+ else if pname == "|" then
+ return v.byte_instance(recvval | args[1].to_b)
else if pname == "to_f" then
return v.float_instance(recvval.to_f)
else if pname == "to_i" then
return v.float_instance(args[0].to_f.log)
else if pname == "pow" then
return v.float_instance(args[0].to_f.pow(args[1].to_f))
- else if pname == "rand" then
- return v.float_instance(args[0].to_f.rand)
else if pname == "abs" then
return v.float_instance(args[0].to_f.abs)
else if pname == "hypot_with" then
else if pname == "round" then
return v.float_instance(args[0].to_f.round)
end
- else if cname == "NativeString" then
+ else if cname == "CString" then
if pname == "new" then
- return v.native_string_instance_len(args[1].to_i)
+ return v.c_string_instance_len(args[1].to_i)
end
- var recvval = args.first.val.as(NativeString)
+ var recvval = args.first.val.as(CString)
if pname == "[]" then
var arg1 = args[1].to_i
return v.byte_instance(recvval[arg1])
recvval[arg1] = args[2].val.as(Byte)
return null
else if pname == "copy_to" then
- # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
- var destval = args[1].val.as(NativeString)
+ # sig= copy_to(dest: CString, length: Int, from: Int, to: Int)
+ var destval = args[1].val.as(CString)
var lenval = args[2].to_i
var fromval = args[3].to_i
var toval = args[4].to_i
return v.int_instance(recvval.atoi)
else if pname == "fast_cstring" then
var ns = recvval.fast_cstring(args[1].to_i)
- return v.native_string_instance(ns.to_s)
+ return v.c_string_instance(ns.to_s)
+ else if pname == "fetch_4_chars" then
+ return v.uint32_instance(args[0].val.as(CString).fetch_4_chars(args[1].to_i))
+ else if pname == "fetch_4_hchars" then
+ return v.uint32_instance(args[0].val.as(CString).fetch_4_hchars(args[1].to_i))
+ else if pname == "utf8_length" then
+ return v.int_instance(args[0].val.as(CString).utf8_length(args[1].to_i, args[2].to_i))
end
- else if pname == "calloc_string" then
- return v.native_string_instance_len(args[1].to_i)
else if cname == "NativeArray" then
if pname == "new" then
var val = new Array[Instance].filled_with(v.null_instance, args[1].to_i)
return v.int_instance(v.arguments.length)
else if pname == "native_argv" then
var txt = v.arguments[args[1].to_i]
- return v.native_string_instance(txt)
- else if pname == "native_argc" then
- return v.int_instance(v.arguments.length)
- else if pname == "native_argv" then
- var txt = v.arguments[args[1].to_i]
- return v.native_string_instance(txt)
+ return v.c_string_instance(txt)
else if pname == "lexer_goto" then
return v.int_instance(lexer_goto(args[1].to_i, args[2].to_i))
else if pname == "lexer_accept" then
return evaluate_expr(v, recv, f)
else if mpropdef == mwritepropdef then
assert args.length == 2
- v.write_attribute(attr, recv, args[1])
+ var arg = args[1]
+ if is_optional and arg.mtype isa MNullType then
+ var f = v.new_frame(self, mpropdef, args)
+ arg = evaluate_expr(v, recv, f)
+ end
+ v.write_attribute(attr, recv, arg)
return null
else
abort
# Evaluate and set the default value of the attribute in `recv`
private fun init_expr(v: NaiveInterpreter, recv: Instance)
do
- if is_lazy then return
+ if is_lazy or is_optional then return
if has_value then
var f = v.new_frame(self, mreadpropdef.as(not null), [recv])
evaluate_expr(v, recv, f)
val = v.expr(nexpr)
else if nblock != null then
v.stmt(nblock)
- assert v.returnmark == f
+ assert v.escapemark == return_mark
val = v.escapevalue
- v.returnmark = null
- v.escapevalue = null
+ v.escapemark = null
else
abort
end
redef class AClassdef
# Execute an implicit `mpropdef` associated with the current node.
- private fun call(v: NaiveInterpreter, mpropdef: MMethodDef, args: Array[Instance]): nullable Instance
+ private fun call(v: NaiveInterpreter, mpropdef: MMethodDef, arguments: Array[Instance]): nullable Instance
do
if mpropdef.mproperty.is_root_init then
- assert args.length == 1
+ assert arguments.length == 1
if not mpropdef.is_intro then
# standard call-next-method
- var superpd = mpropdef.lookup_next_definition(v.mainmodule, args.first.mtype)
- v.call(superpd, args)
+ var superpd = mpropdef.lookup_next_definition(v.mainmodule, arguments.first.mtype)
+ v.call(superpd, arguments)
end
return null
else
end
end
-redef class AReturnExpr
- redef fun stmt(v)
- do
- var ne = self.n_expr
- if ne != null then
- var i = v.expr(ne)
- if i == null then return
- v.escapevalue = i
- end
- v.returnmark = v.frame
- end
-end
-
redef class AAbortExpr
redef fun stmt(v)
do
redef class ADoExpr
redef fun stmt(v)
do
- v.stmt(self.n_block)
- v.is_escape(self.break_mark) # Clear the break (if any)
+ # If this bloc has a catch, handle it with a do ... catch ... end
+ if self.n_catch != null then
+ var frame = v.frame
+ v.catch_count += 1
+ do
+ v.stmt(self.n_block)
+ v.is_escape(self.break_mark) # Clear the break (if any)
+ v.catch_count -= 1
+ catch
+ # Restore the current frame if needed
+ while v.frame != frame do v.frames.shift
+ v.catch_count -= 1
+ v.stmt(self.n_catch)
+ end
+ else
+ v.stmt(self.n_block)
+ v.is_escape(self.break_mark)
+ end
end
end
v.callsite(method_start, [expr])
v.stmt(self.n_block)
v.is_escape(self.break_mark) # Clear the break
+
+ # Execute the finally without an escape
+ var old_mark = v.escapemark
+ v.escapemark = null
v.callsite(method_finish, [expr])
+ # Restore the escape unless another escape was provided
+ if v.escapemark == null then v.escapemark = old_mark
end
end
redef class ACharExpr
redef fun expr(v)
do
+ if is_ascii then return v.byte_instance(self.value.as(not null).ascii)
+ if is_code_point then return v.int_instance(self.value.as(not null).code_point)
return v.char_instance(self.value.as(not null))
end
end
end
end
+redef class AugmentedStringFormExpr
+ # Factorize the making of a `Regex` object from a literal prefixed string
+ fun make_re(v: NaiveInterpreter, rs: Instance): nullable Instance do
+ var tore = to_re
+ assert tore != null
+ var res = v.callsite(tore, [rs])
+ if res == null then
+ print "Cannot call property `to_re` on {self}"
+ abort
+ end
+ for j in suffix.chars do
+ if j == 'i' then
+ var prop = ignore_case
+ assert prop != null
+ v.callsite(prop, [res, v.bool_instance(true)])
+ continue
+ end
+ if j == 'm' then
+ var prop = newline
+ assert prop != null
+ v.callsite(prop, [res, v.bool_instance(true)])
+ continue
+ end
+ if j == 'b' then
+ var prop = extended
+ assert prop != null
+ v.callsite(prop, [res, v.bool_instance(false)])
+ continue
+ end
+ # Should not happen, this needs to be updated
+ # along with the addition of new suffixes
+ abort
+ end
+ return res
+ end
+end
+
redef class AStringFormExpr
- redef fun expr(v)
- do
- var txt = self.value.as(not null)
- return v.string_instance(txt)
+ redef fun expr(v) do return v.string_instance(value)
+end
+
+redef class AStringExpr
+ redef fun expr(v) do
+ var s = v.string_instance(value)
+ if is_string then return s
+ if is_bytestring then
+ var ns = v.c_string_instance_from_ns(bytes.items, bytes.length)
+ var ln = v.int_instance(bytes.length)
+ var prop = to_bytes_with_copy
+ assert prop != null
+ var res = v.callsite(prop, [ns, ln])
+ if res == null then
+ print "Cannot call property `to_bytes` on {self}"
+ abort
+ end
+ s = res
+ else if is_re then
+ var res = make_re(v, s)
+ assert res != null
+ s = res
+ else
+ print "Unimplemented prefix or suffix for {self}"
+ abort
+ end
+ return s
end
end
var i = v.array_instance(array, v.mainmodule.object_type)
var res = v.send(v.force_get_primitive_method("plain_to_s", i.mtype), [i])
assert res != null
+ if is_re then res = make_re(v, res)
return res
end
end
nitlanguage / nit.git / blobdiff