module astbuilder
intrude import semantize::typing
-intrude import semantize::literal
-intrude import semantize::parser
+intrude import literal
+intrude import parser
intrude import semantize::scope
# General factory to build semantic nodes in the AST of expressions
class ASTBuilder
# The module used as reference for the building
- # It is used to gather types and other stufs
+ # It is used to gather types and other stuff
var mmodule: MModule
# The anchor used for some mechanism relying on types
var anchor: nullable MClassType
+ # Check mmodule to avoid a new instantiation of ASTBuilder
+ fun check_mmodule(mmodule: MModule)
+ do
+ if self.mmodule != mmodule then self.mmodule = mmodule
+ end
+
# Make a new Int literal
- fun make_int(value: Int): AIntExpr
+ fun make_int(value: Int): AIntegerExpr
do
- return new ADecIntExpr.make(value, mmodule.get_primitive_class("Int").mclass_type)
+ return new AIntegerExpr.make(value, mmodule.int_type)
end
- # Make a new instatiation
+ # Make a new instantiation
fun make_new(callsite: CallSite, args: nullable Array[AExpr]): ANewExpr
do
return new ANewExpr.make(callsite, args)
return new ABlockExpr.make
end
+ # Make a new, empty, loop of statements
+ fun make_loop: ALoopExpr
+ do
+ return new ALoopExpr.make
+ end
+
# Make a new variable read
fun make_var_read(variable: Variable, mtype: MType): AVarExpr
do
return new ADoExpr.make
end
- # Make a new condinionnal
+ # Make a new break for a given escapemark
+ fun make_break(escapemark: EscapeMark): ABreakExpr
+ do
+ return new ABreakExpr.make(escapemark)
+ end
+
+ # Make a new conditional
# `mtype` is the return type of the whole if, in case of a ternary operator.
fun make_if(condition: AExpr, mtype: nullable MType): AIfExpr
do
return new AIfExpr.make(condition, mtype)
end
+
+ # Make a new assert
+ fun make_assert(n_id : nullable TId , n_expr : AExpr , n_else : nullable AExpr): AAssertExpr
+ do
+ return new AAssertExpr.make(n_id , n_expr , n_else)
+ end
+
+ # Make a new method
+ fun make_method(n_visibility: nullable AVisibility,
+ tk_redef: nullable TKwredef,
+ mmethoddef: nullable MMethodDef,
+ n_signature: nullable ASignature,
+ n_annotations: nullable AAnnotations,
+ n_extern_calls: nullable AExternCalls,
+ n_extern_code_block: nullable AExternCodeBlock,
+ n_block: nullable AExpr): AMethPropdef
+ do
+ return new AMethPropdef.make(n_visibility, tk_redef, mmethoddef, n_signature, n_annotations, n_extern_calls, n_extern_code_block, n_block)
+ end
+
+ # Make a new or with two expr
+ fun make_or(right_expr: AExpr, left_expr: AExpr): AOrExpr
+ do
+ return new AOrExpr.make(right_expr,left_expr)
+ end
+
+ # Make a new and with two expr
+ fun make_and(right_expr: AExpr, left_expr: AExpr): AAndExpr
+ do
+ return new AAndExpr.make(right_expr,left_expr)
+ end
+
+ # Make a new parenthesis expr
+ fun make_parenthesis(expr: AExpr, annotations: nullable AAnnotations): AParExpr
+ do
+ return new AParExpr.make(expr,annotations)
+ end
+
+ # Make a new message super
+ fun make_super_call(args: nullable Array[AExpr], n_qualified: nullable AQualified): ASuperExpr
+ do
+ return new ASuperExpr.make(args,n_qualified)
+ end
+
+ # Make a new return
+ fun make_return(expr: nullable AExpr): AReturnExpr
+ do
+ return new AReturnExpr.make(expr)
+ end
end
redef class AExpr
private var variable_cache: nullable Variable
# The `detach` method completely remove the node in the parent.
- # Owever, sometime, it is useful to keep the emplacement of the removed child.
+ # However, sometime, it is useful to keep the emplacement of the removed child.
#
- # The standard usecase is the insertion of a node beetwen a parent `p` and a child `p.c`.
+ # The standard use case is the insertion of a node between a parent `p` and a child `p.c`.
# To create the new node `n`, we need to attach the child to it.
# But, to put `n` where `c` was in `p`, the place has to be remembered.
#
- # var p: AExpr
- # var c = p.c
- # var h = c.detach_with_placeholder
- # var n = astbuilder.make_XXX(c)
- # h.replace_with(n)
+ # ~~~nitish
+ # var p: AExpr
+ # var c = p.c
+ # var h = c.detach_with_placeholder
+ # var n = astbuilder.make_XXX(c)
+ # h.replace_with(n)
+ # ~~~
fun detach_with_placeholder: AExpr
do
var h = new APlaceholderExpr.make
# Note: this method, aimed to `ABlockExpr` is promoted to `AExpr` because of the limitations of the hierarchies generated by sablecc3
fun add(expr: AExpr)
do
+ print "add not implemented in {inspect}"
abort
end
+
+ redef fun accept_ast_validation(v)
+ do
+ super
+ if mtype == null and not is_typed then
+ #debug "TYPING: untyped expression"
+ end
+ end
end
# A placeholder for a `AExpr` node
-# Instances are transiantly used to mark some specific emplacments in the AST
+# Instances are transiantly used to mark some specific emplacements in the AST
# during complex transformations.
#
# Their must not appear in a valid AST
private init make
do
end
+
+ redef fun accept_ast_validation(v)
+ do
+ super
+ debug "PARENT: remaining placeholder"
+ end
+end
+
+redef class AReturnExpr
+ private init make(expr: nullable AExpr)
+ do
+ self.init_areturnexpr(null, expr)
+ end
+end
+
+redef class ASuperExpr
+ private init make(args: nullable Array[AExpr], n_qualified: nullable AQualified)
+ do
+ var n_args = new AListExprs
+ if args != null then
+ n_args.n_exprs.add_all(args)
+ end
+ self.init_asuperexpr(n_qualified, new TKwsuper, n_args)
+ end
+end
+
+redef class AParExpr
+ private init make(expr: AExpr, annotations: nullable AAnnotations)
+ do
+ self.location = expr.location
+ self.init_aparexpr(new TOpar, expr, new TCpar, annotations)
+ end
+end
+
+redef class AOrExpr
+ private init make(right_expr: AExpr, left_expr: AExpr)
+ do
+ self.init_aorexpr(right_expr,new TKwor,left_expr)
+ end
+end
+
+redef class AAndExpr
+ private init make(right_expr: AExpr, left_expr: AExpr)
+ do
+ self.init_aandexpr(right_expr,new TKwand ,left_expr)
+ end
+end
+
+redef class AMethPropdef
+ private init make(n_visibility: nullable AVisibility,
+ tk_redef: nullable TKwredef,
+ mmethoddef: nullable MMethodDef,
+ n_signature: nullable ASignature,
+ n_annotations: nullable AAnnotations,
+ n_extern_calls: nullable AExternCalls,
+ n_extern_code_block: nullable AExternCodeBlock,
+ n_block: nullable AExpr)
+ do
+ var n_tid = new TId
+ var n_methid = new AIdMethid.init_aidmethid(n_tid)
+ if n_signature == null then n_signature = new ASignature
+ if n_visibility == null then n_visibility = new APublicVisibility
+ self.init_amethpropdef(null,tk_redef,n_visibility,new TKwmeth,null,null,null,n_methid,n_signature,n_annotations,n_extern_calls,n_extern_code_block,new TKwdo,n_block,new TKwend)
+
+ if mmethoddef != null then
+ self.n_methid.as(AIdMethid).n_id.text = mmethoddef.name
+ self.mpropdef = mmethoddef
+ end
+ end
+end
+
+redef class AAssertExpr
+ private init make(n_id : nullable TId , n_expr : nullable AExpr , n_else : nullable AExpr)
+ do
+ n_kwassert = new TKwassert
+ n_kwelse = null
+ if n_else != null then n_kwelse = new TKwelse
+ self.init_aassertexpr(n_kwassert, n_id , n_expr , n_kwelse , n_else)
+ end
end
redef class ABlockExpr
self.is_typed = true
end
- redef fun add(expr: AExpr)
+ redef fun add(expr)
do
n_expr.add expr
end
end
+redef class ALoopExpr
+ private init make
+ do
+ _n_kwloop = new TKwloop
+ self.is_typed = true
+ n_block = new ABlockExpr
+ n_block.is_typed = true
+ end
+
+ redef fun add(expr)
+ do
+ n_block.add expr
+ end
+end
+
redef class ADoExpr
private init make
do
_n_kwdo = new TKwdo
- escapemark = new EscapeMark(null, false)
+ self.is_typed = true
+ n_block = new ABlockExpr
+ n_block.is_typed = true
end
# Make a new break expression of the given do
fun make_break: ABreakExpr
do
- var escapemark = self.escapemark
+ var escapemark = self.break_mark
if escapemark == null then
- escapemark = new EscapeMark(null, false)
- self.escapemark = escapemark
+ escapemark = new EscapeMark(null)
+ self.break_mark = escapemark
end
return new ABreakExpr.make(escapemark)
end
+
+ redef fun add(expr)
+ do
+ n_block.add expr
+ end
end
redef class ABreakExpr
private init make(escapemark: EscapeMark)
do
+ _n_kwbreak = new TKwbreak
self.escapemark = escapemark
+ escapemark.escapes.add self
+ self.is_typed = true
end
end
_n_kwif = new TKwif
_n_expr = condition
_n_expr.parent = self
+ _n_kwthen = new TKwthen
_n_then = new ABlockExpr.make
+ _n_kwelse = new TKwelse
_n_else = new ABlockExpr.make
self.mtype = mtype
self.is_typed = true
redef class AType
private init make
do
- _n_id = new TClassid
+ var n_id = new TClassid
+ var n_qid = new AQclassid
+ n_qid.n_id = n_id
+ _n_qid = n_qid
end
end
-redef class ADecIntExpr
+redef class AIntegerExpr
private init make(value: Int, t: MType)
do
self.value = value
- self._n_number = new TNumber # dummy
+ self._n_integer = new TInteger # dummy
self.mtype = t
end
end
n_args.n_exprs.add_all(args)
end
self.callsite = callsite
- self.mtype = callsite.recv
+ self.recvtype = callsite.recv.as(MClassType)
+ if callsite.mproperty.is_new then
+ self.mtype = callsite.msignature.return_mtype
+ else
+ self.mtype = callsite.recv
+ end
self.is_typed = true
end
end
do
self._n_expr = recv
_n_args = new AListExprs
- _n_id = new TId
+ _n_qid = new AQid
+ _n_qid.n_id = new TId
+ _n_qid.n_id.text = callsite.mproperty.name
if args != null then
self.n_args.n_exprs.add_all(args)
end
- var mtype = recv.mtype.as(not null)
self.callsite = callsite
self.mtype = callsite.msignature.return_mtype
self.is_typed = true
end
end
+# Check the consitency of AST
+class ASTValidationVisitor
+ super Visitor
+ redef fun visit(node)
+ do
+ node.accept_ast_validation(self)
+ end
+ private var path = new CircularArray[ANode]
+ private var seen = new HashSet[ANode]
+end
+
+redef class ANode
+ # Recursively validate a AST node.
+ # This ensure that location and parenting are defined and coherent.
+ #
+ # After complex low-level AST manipulation and construction,
+ # it is recommended to call it.
+ #
+ # Note: this just instantiate and run an `ASTValidationVisitor`.
+ fun validate
+ do
+ (new ASTValidationVisitor).enter_visit(self)
+ end
+
+ private fun accept_ast_validation(v: ASTValidationVisitor)
+ do
+ var parent = self.parent
+ var path = v.path
+
+ if path.length > 0 then
+ var path_parent = v.path.first
+ if parent == null then
+ self.parent = path_parent
+ #debug "PARENT: expected parent: {path_parent}"
+ v.seen.add(self)
+ else if parent != path_parent then
+ self.parent = path_parent
+ if v.seen.has(self) then
+ debug "DUPLICATE (NOTATREE): already seen node with parent {parent} now with {path_parent}."
+ else
+ v.seen.add(self)
+ debug "PARENT: expected parent: {path_parent}, got {parent}"
+ end
+ end
+ end
+
+ if not isset _location then
+ #debug "LOCATION: unlocated node {v.path.join(", ")}"
+ _location = self.parent.location
+ end
+
+ path.unshift(self)
+ visit_all(v)
+ path.shift
+ end
+end
+
+redef class AAnnotation
+ redef fun accept_ast_validation(v)
+ do
+ # Do not enter in annotations
+ end
+end
nitlanguage / nit.git / blobdiff