import syntax_base
import escape
+import control_flow
redef class MMSrcModule
# Walk trough the module and type statments and expressions
# Require than supermodules are processed
- meth do_typing(tc: ToolContext)
+ fun do_typing(tc: ToolContext)
do
var tv = new TypingVisitor(tc, self)
tv.visit(node)
# * Check type conformance
private class TypingVisitor
special AbsSyntaxVisitor
- redef meth visit(n)
+ redef fun visit(n)
do
if n != null then n.accept_typing(self)
end
# Current knowledge about variables names and types
- readable writable attr _variable_ctx: VariableContext
+ fun variable_ctx: VariableContext do return _variable_ctx.as(not null)
+ writable var _variable_ctx: nullable VariableContext
+
+ # Non-bypassable knowledge about variables names and types
+ fun base_variable_ctx: VariableContext do return _base_variable_ctx.as(not null)
+ writable var _base_variable_ctx: nullable VariableContext
# Current knowledge about escapable blocks
- readable writable attr _escapable_ctx: EscapableContext = new EscapableContext(self)
+ readable writable var _escapable_ctx: EscapableContext = new EscapableContext(self)
# The current reciever
- readable writable attr _self_var: ParamVariable
+ fun self_var: ParamVariable do return _self_var.as(not null)
+ writable var _self_var: nullable ParamVariable
# Block of the current method
- readable writable attr _top_block: PExpr
+ readable writable var _top_block: nullable PExpr
# List of explicit invocation of constructors of super-classes
- readable writable attr _explicit_super_init_calls: Array[MMMethod]
+ readable writable var _explicit_super_init_calls: nullable Array[MMMethod]
# Is a other constructor of the same class invoked
- readable writable attr _explicit_other_init_call: Bool
+ readable writable var _explicit_other_init_call: Bool = false
# Make the if_true_variable_ctx of the expression effective
- private meth use_if_true_variable_ctx(e: PExpr)
+ private fun use_if_true_variable_ctx(e: PExpr)
do
var ctx = e.if_true_variable_ctx
- if ctx != null then
- variable_ctx = ctx
- end
+ if ctx != null then variable_ctx = ctx
end
+ # Make the if_false_variable_ctx of the expression effective
+ private fun use_if_false_variable_ctx(e: PExpr)
+ do
+ var ctx = e.if_false_variable_ctx
+ if ctx != null then variable_ctx = ctx
+ end
+
+ # Number of nested once
+ readable writable var _once_count: Int = 0
+
init(tc, module) do super
- private meth get_default_constructor_for(n: PNode, c: MMLocalClass, prop: MMSrcMethod): MMMethod
+ private fun get_default_constructor_for(n: PNode, c: MMLocalClass, prop: MMSrcMethod): nullable MMMethod
do
var v = self
#var prop = v.local_property
var gps = gp.signature_for(c.get_type)
assert gp isa MMSrcMethod
var garity = gps.arity
- if prop != null and gp.name == prop.name then
+ if gp.name == prop.name then
if garity == 0 or (parity == garity and prop.signature < gps) then
return gp
else
end
end
-# Associate symbols to variable and variables to type
-# Can be nested
-private class VariableContext
- # Look for the variable from its name
- # Return null if nothing found
- meth [](s: Symbol): Variable
- do
- if _dico.has_key(s) then
- return _dico[s]
- else
- return null
- end
- end
-
- # Register a new variable with its name
- meth add(v: Variable)
- do
- _dico[v.name] = v
- end
-
-
- # The effective static type of a given variable
- # May be different from the declaration static type
- meth stype(v: Variable): MMType
- do
- return v.stype
- end
-
- # Variables by name (in the current context only)
- attr _dico: Map[Symbol, Variable]
-
- # Build a new VariableContext
- meth sub: SubVariableContext
- do
- return new SubVariableContext.with_prev(self)
- end
-
- # Build a nested VariableContext with new variable information
- meth sub_with(v: Variable, t: MMType): SubVariableContext
- do
- return new CastVariableContext.with_prev(self, v, t)
- end
-
- init
- do
- _dico = new HashMap[Symbol, Variable]
- end
-end
-
-private class SubVariableContext
-special VariableContext
- readable attr _prev: VariableContext
-
- redef meth [](s)
- do
- if _dico.has_key(s) then
- return _dico[s]
- else
- return prev[s]
- end
- end
-
- redef meth stype(v)
- do
- return prev.stype(v)
- end
-
- init with_prev(p: VariableContext)
- do
- init
- _prev = p
- end
-end
-
-private class CastVariableContext
-special SubVariableContext
- attr _variable: Variable
- attr _var_type: MMType
-
- redef meth stype(v)
- do
- if _variable == v then
- return _var_type
- end
- return prev.stype(v)
- end
-
- init with_prev(p: VariableContext, v: Variable, t: MMType)
- do
- super(p)
- _variable = v
- _var_type =t
- end
-end
###############################################################################
redef class PNode
- private meth accept_typing(v: TypingVisitor)
+ private fun accept_typing(v: TypingVisitor)
do
accept_abs_syntax_visitor(v)
after_typing(v)
end
- private meth after_typing(v: TypingVisitor) do end
+ private fun after_typing(v: TypingVisitor) do end
end
redef class PClassdef
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
v.self_var = new ParamVariable("self".to_symbol, self)
v.self_var.stype = local_class.get_type
end
redef class AAttrPropdef
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
super
if n_expr != null then
- v.check_conform_expr(n_expr, prop.signature.return_type)
+ v.check_conform_expr(n_expr.as(not null), prop.signature.return_type.as(not null))
end
end
end
redef class AMethPropdef
- redef readable attr _self_var: ParamVariable
- redef meth accept_typing(v)
+ redef fun self_var do return _self_var.as(not null)
+ var _self_var: nullable ParamVariable
+ redef fun accept_typing(v)
do
- v.variable_ctx = new VariableContext
+ v.variable_ctx = new RootVariableContext(v, self)
+ v.base_variable_ctx = v.variable_ctx
_self_var = v.self_var
super
end
end
+redef class AConcreteMethPropdef
+ redef fun accept_typing(v)
+ do
+ super
+ if v.variable_ctx.unreash == false and method.signature.return_type != null then
+ v.error(self, "Control error: Reached end of function (a 'return' with a value was expected).")
+ end
+ end
+end
+
redef class AConcreteInitPropdef
- readable attr _super_init_calls: Array[MMMethod] = new Array[MMMethod]
- readable attr _explicit_super_init_calls: Array[MMMethod] = new Array[MMMethod]
- redef meth accept_typing(v)
+ readable var _super_init_calls: Array[MMMethod] = new Array[MMMethod]
+ readable var _explicit_super_init_calls: Array[MMMethod] = new Array[MMMethod]
+ redef fun accept_typing(v)
do
v.top_block = n_block
v.explicit_super_init_calls = explicit_super_init_calls
else
var i = 0
var l = explicit_super_init_calls.length
- var cur_m: MMMethod = null
- var cur_c: MMLocalClass = null
+ var cur_m: nullable MMMethod = null
+ var cur_c: nullable MMLocalClass = null
if i < l then
cur_m = explicit_super_init_calls[i]
cur_c = cur_m.global.intro.local_class.for_module(v.module)
j += 1
else if cur_c != null and (c.cshe <= cur_c or cur_c.global.is_mixin) then
if c == cur_c then j += 1
- super_init_calls.add(cur_m)
+ super_init_calls.add(cur_m.as(not null))
i += 1
if i < l then
cur_m = explicit_super_init_calls[i]
end
redef class PParam
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
- # TODO: why the test?
- if v.variable_ctx != null then
- v.variable_ctx.add(variable)
- end
+ v.variable_ctx.add(variable)
end
end
redef class AClosureDecl
# The corresponding escapable object
- readable attr _escapable: EscapableBlock
+ readable var _escapable: nullable EscapableBlock
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
# Register the closure for ClosureCallExpr
v.variable_ctx.add(variable)
var old_var_ctx = v.variable_ctx
- v.variable_ctx = v.variable_ctx.sub
+ var old_base_var_ctx = v.base_variable_ctx
+ v.base_variable_ctx = v.variable_ctx
+ v.variable_ctx = v.variable_ctx.sub(self)
- _escapable = new EscapableClosure(self, variable.closure, null)
- v.escapable_ctx.push(_escapable)
+ var escapable = new EscapableClosure(self, variable.closure, null)
+ _escapable = escapable
+ v.escapable_ctx.push(escapable)
super
+ if n_expr != null then
+ if v.variable_ctx.unreash == false then
+ if variable.closure.signature.return_type != null then
+ v.error(self, "Control error: Reached end of block (a 'continue' with a value was expected).")
+ else if variable.closure.is_break then
+ v.error(self, "Control error: Reached end of break block (an 'abort' was expected).")
+ end
+ end
+ end
+
+ old_var_ctx.merge(v.variable_ctx)
v.variable_ctx = old_var_ctx
+ v.base_variable_ctx = old_base_var_ctx
v.escapable_ctx.pop
end
end
redef class PType
- readable attr _stype: MMType
- redef meth after_typing(v)
+ fun stype: MMType do return _stype.as(not null)
+ var _stype: nullable MMType
+
+ redef fun after_typing(v)
do
_stype = get_stype(v)
end
end
redef class PExpr
- redef readable attr _stype: MMType
-
+ redef readable var _is_typed: Bool = false
+ redef fun is_statement: Bool do return _stype == null
+ redef fun stype
+ do
+ if not is_typed then
+ print "{locate}: not is_typed"
+ abort
+ end
+ if is_statement then
+ print "{locate}: is_statement"
+ abort
+ end
+ return _stype.as(not null)
+ end
+ var _stype: nullable MMType
+
# Is the expression the implicit receiver
- meth is_implicit_self: Bool do return false
+ fun is_implicit_self: Bool do return false
# Is the expression the current receiver (implicit or explicit)
- meth is_self: Bool do return false
+ fun is_self: Bool do return false
# The variable accessed is any
- meth its_variable: Variable do return null
+ fun its_variable: nullable Variable do return null
# The variable type information if current boolean expression is true
- readable private attr _if_true_variable_ctx: VariableContext
+ readable private var _if_true_variable_ctx: nullable VariableContext
+
+ # The variable type information if current boolean expression is false
+ readable private var _if_false_variable_ctx: nullable VariableContext
end
redef class AVardeclExpr
- redef meth after_typing(v)
+ var _variable: nullable VarVariable
+ redef fun variable do return _variable.as(not null)
+
+ redef fun after_typing(v)
do
var va = new VarVariable(n_id.to_symbol, self)
- variable = va
+ _variable = va
v.variable_ctx.add(va)
+ if n_expr != null then v.variable_ctx.mark_is_set(va)
if n_type != null then
va.stype = n_type.stype
if n_expr != null then
- v.check_conform_expr(n_expr, va.stype)
+ v.check_conform_expr(n_expr.as(not null), va.stype)
end
else
- v.check_expr(n_expr)
+ if not v.check_expr(n_expr.as(not null)) then return
va.stype = n_expr.stype
end
+ _is_typed = true
end
end
redef class ABlockExpr
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
var old_var_ctx = v.variable_ctx
- v.variable_ctx = v.variable_ctx.sub
+ v.variable_ctx = v.variable_ctx.sub(self)
- super
+ for e in n_expr do
+ if v.variable_ctx.unreash and not v.variable_ctx.already_unreash then
+ v.variable_ctx.already_unreash = true
+ v.warning(e, "Warning: unreachable statement.")
+ end
+ v.visit(e)
+ end
+ old_var_ctx.merge(v.variable_ctx)
v.variable_ctx = old_var_ctx
+ _is_typed = true
end
end
redef class AReturnExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ v.variable_ctx.unreash = true
var t = v.local_property.signature.return_type
- if n_expr == null and t != null then
+ var e = n_expr
+ if e == null and t != null then
v.error(self, "Error: Return without value in a function.")
- else if n_expr != null and t == null then
+ else if e != null and t == null then
v.error(self, "Error: Return with value in a procedure.")
- else if n_expr != null and t != null then
- v.check_conform_expr(n_expr, t)
+ else if e != null and t != null then
+ v.check_conform_expr(e, t)
end
+ _is_typed = true
end
end
redef class AContinueExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ v.variable_ctx.unreash = true
var esc = compute_escapable_block(v.escapable_ctx)
if esc == null then return
else if n_expr != null and t == null then
v.error(self, "Error: continue without value required in this block.")
else if n_expr != null and t != null then
- v.check_conform_expr(n_expr, t)
+ v.check_conform_expr(n_expr.as(not null), t)
end
+ _is_typed = true
end
end
redef class ABreakExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ v.variable_ctx.unreash = true
var esc = compute_escapable_block(v.escapable_ctx)
if esc == null then return
v.error(self, "Error: break without value required in this block.")
else if n_expr != null and bl != null then
# Typing check can only be done later
- bl.add(n_expr)
+ bl.add(n_expr.as(not null))
end
+ _is_typed = true
+ end
+end
+
+redef class AAbortExpr
+ redef fun after_typing(v)
+ do
+ v.variable_ctx.unreash = true
end
end
redef class AIfExpr
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
var old_var_ctx = v.variable_ctx
v.visit(n_expr)
v.check_conform_expr(n_expr, v.type_bool)
+ # Prepare 'then' context
v.use_if_true_variable_ctx(n_expr)
- v.visit(n_then)
- # Restore variable ctx
+ # Process the 'then'
+ if n_then != null then
+ v.variable_ctx = v.variable_ctx.sub(n_then.as(not null))
+ v.visit(n_then)
+ end
+
+ # Remember what appened in the 'then'
+ var then_var_ctx = v.variable_ctx
+
+ # Prepare 'else' context
v.variable_ctx = old_var_ctx
+ v.use_if_false_variable_ctx(n_expr)
+ # Process the 'else'
if n_else != null then
+ v.variable_ctx = v.variable_ctx.sub(n_else.as(not null))
v.visit(n_else)
- v.variable_ctx = old_var_ctx
end
+
+ # Merge 'then' and 'else' contexts
+ old_var_ctx.merge2(then_var_ctx, v.variable_ctx, v.base_variable_ctx)
+ v.variable_ctx = old_var_ctx
+ _is_typed = true
end
end
redef class AWhileExpr
# The corresponding escapable block
- readable attr _escapable: EscapableBlock
+ readable var _escapable: nullable EscapableBlock
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
- _escapable = new EscapableBlock(self)
- v.escapable_ctx.push(_escapable)
-
- super
+ var escapable = new EscapableBlock(self)
+ _escapable = escapable
+ v.escapable_ctx.push(escapable)
+ var old_var_ctx = v.variable_ctx
+ var old_base_var_ctx = v.base_variable_ctx
+ v.base_variable_ctx = v.variable_ctx
+ v.variable_ctx = v.variable_ctx.sub(self)
+ # Process condition
+ v.visit(n_expr)
v.check_conform_expr(n_expr, v.type_bool)
+
+ # Prepare inside context (assert cond)
+ v.use_if_true_variable_ctx(n_expr)
+
+ # Process inside
+ if n_block != null then
+ v.variable_ctx = v.variable_ctx.sub(n_block.as(not null))
+ v.visit(n_block)
+ end
+
+ v.variable_ctx = old_var_ctx
+ v.base_variable_ctx = old_base_var_ctx
v.escapable_ctx.pop
+ _is_typed = true
end
end
redef class AForExpr
- # The corresponding escapable block
- readable attr _escapable: EscapableBlock
+ var _variable: nullable AutoVariable
+ redef fun variable do return _variable.as(not null)
- readable attr _meth_iterator: MMMethod
- readable attr _meth_is_ok: MMMethod
- readable attr _meth_item: MMMethod
- readable attr _meth_next: MMMethod
- redef meth accept_typing(v)
- do
- _escapable = new EscapableBlock(self)
- v.escapable_ctx.push(_escapable)
+ # The corresponding escapable block
+ readable var _escapable: nullable EscapableBlock
+
+ var _meth_iterator: nullable MMMethod
+ fun meth_iterator: MMMethod do return _meth_iterator.as(not null)
+ var _meth_is_ok: nullable MMMethod
+ fun meth_is_ok: MMMethod do return _meth_is_ok.as(not null)
+ var _meth_item: nullable MMMethod
+ fun meth_item: MMMethod do return _meth_item.as(not null)
+ var _meth_next: nullable MMMethod
+ fun meth_next: MMMethod do return _meth_next.as(not null)
+ redef fun accept_typing(v)
+ do
+ var escapable = new EscapableBlock(self)
+ _escapable = escapable
+ v.escapable_ctx.push(escapable)
- v.variable_ctx = v.variable_ctx.sub
+ var old_var_ctx = v.variable_ctx
+ var old_base_var_ctx = v.base_variable_ctx
+ v.base_variable_ctx = v.variable_ctx
+ v.variable_ctx = v.variable_ctx.sub(self)
var va = new AutoVariable(n_id.to_symbol, self)
- variable = va
+ _variable = va
v.variable_ctx.add(va)
v.visit(n_expr)
+ if not v.check_conform_expr(n_expr, v.type_collection) then return
var expr_type = n_expr.stype
- if not v.check_conform_expr(n_expr, v.type_collection) then
- return
- end
+
_meth_iterator = expr_type.local_class.select_method(once ("iterator".to_symbol))
if _meth_iterator == null then
v.error(self, "Error: Collection MUST have an iterate method")
return
end
- var iter_type = _meth_iterator.signature_for(expr_type).return_type
+ var iter_type = _meth_iterator.signature_for(expr_type).return_type.as(not null)
_meth_is_ok = iter_type.local_class.select_method(once ("is_ok".to_symbol))
if _meth_is_ok == null then
v.error(self, "Error: {iter_type} MUST have an is_ok method")
if n_block != null then v.visit(n_block)
# pop context
- var varctx = v.variable_ctx
- assert varctx isa SubVariableContext
- v.variable_ctx = varctx.prev
-
+ v.variable_ctx = old_var_ctx
+ v.base_variable_ctx = old_base_var_ctx
v.escapable_ctx.pop
+ _is_typed = true
end
end
redef class AAssertExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
v.check_conform_expr(n_expr, v.type_bool)
v.use_if_true_variable_ctx(n_expr)
+ _is_typed = true
end
end
+redef class AVarFormExpr
+ var _variable: nullable Variable
+ redef fun variable do return _variable.as(not null)
+end
+
redef class AVarExpr
- redef meth its_variable do return variable
+ redef fun its_variable do return variable
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ v.variable_ctx.check_is_set(self, variable)
_stype = v.variable_ctx.stype(variable)
+ _is_typed = _stype != null
end
end
redef class AVarAssignExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ v.variable_ctx.mark_is_set(variable)
var t = v.variable_ctx.stype(variable)
- v.check_conform_expr(n_value, t)
+
+ # Check the base type
+ var btype = v.base_variable_ctx.stype(variable)
+ if not v.check_conform_expr(n_value, btype) then return
+
+ # Always cast
+ v.variable_ctx.stype(variable) = n_value.stype
+
+ _is_typed = true
end
end
redef class AReassignFormExpr
- # Compute and check method used through the reassigment operator
- private meth do_lvalue_typing(v: TypingVisitor, type_lvalue: MMType)
+ # Compute and check method used through the reassigment operator
+ # On success return the static type of the result of the reassigment operator
+ # Else display an error and return null
+ private fun do_rvalue_typing(v: TypingVisitor, type_lvalue: nullable MMType): nullable MMType
do
if type_lvalue == null then
- return
+ return null
end
var name = n_assign_op.method_name
var lc = type_lvalue.local_class
if not lc.has_global_property_by_name(name) then
v.error(self, "Error: Method '{name}' doesn't exists in {type_lvalue}.")
- return
+ return null
end
var prop = lc.select_method(name)
prop.global.check_visibility(v, self, v.module, false)
var psig = prop.signature_for(type_lvalue)
_assign_method = prop
- v.check_conform_expr(n_value, psig[0].not_for_self)
- v.check_conform(self, psig.return_type.not_for_self, n_value.stype)
+ if not v.check_conform_expr(n_value, psig[0].not_for_self) then return null
+ return psig.return_type.not_for_self
end
# Method used through the reassigment operator (once computed)
- readable attr _assign_method: MMMethod
+ readable var _assign_method: nullable MMMethod
end
redef class AVarReassignExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ v.variable_ctx.check_is_set(self, variable)
+ v.variable_ctx.mark_is_set(variable)
var t = v.variable_ctx.stype(variable)
- do_lvalue_typing(v, t)
+ var t2 = do_rvalue_typing(v, t)
+ if t2 == null then return
+
+ # Check the base type
+ var btype = v.base_variable_ctx.stype(variable)
+ if not v.check_conform(n_value, t2, btype) then return
+
+ # Always cast
+ v.variable_ctx.stype(variable) = t2
+
+ _is_typed = true
end
end
redef class PAssignOp
- meth method_name: Symbol is abstract
+ fun method_name: Symbol is abstract
end
redef class APlusAssignOp
- redef meth method_name do return once "+".to_symbol
+ redef fun method_name do return once "+".to_symbol
end
redef class AMinusAssignOp
- redef meth method_name do return once "-".to_symbol
+ redef fun method_name do return once "-".to_symbol
end
redef class ASelfExpr
- redef meth its_variable do return variable
+ var _variable: nullable ParamVariable
+ redef fun variable do return _variable.as(not null)
+
+ redef fun its_variable do return variable
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
- variable = v.self_var
+ _variable = v.self_var
_stype = v.variable_ctx.stype(variable)
+ _is_typed = true
end
- redef meth is_self do return true
+ redef fun is_self do return true
end
redef class AImplicitSelfExpr
- redef meth is_implicit_self do return true
+ redef fun is_implicit_self do return true
end
redef class AIfexprExpr
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
var old_var_ctx = v.variable_ctx
v.use_if_true_variable_ctx(n_expr)
v.visit(n_then)
v.variable_ctx = old_var_ctx
+ v.use_if_false_variable_ctx(n_expr)
v.visit(n_else)
v.check_conform_expr(n_expr, v.type_bool)
_stype = v.check_conform_multiexpr(null, [n_then, n_else])
+ _is_typed = _stype != null
end
end
redef class ABoolExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
_stype = v.type_bool
+ _is_typed = true
end
end
redef class AOrExpr
- redef meth after_typing(v)
+ redef fun accept_typing(v)
do
+ var old_var_ctx = v.variable_ctx
+
+ v.visit(n_expr)
+ v.use_if_false_variable_ctx(n_expr)
+
+ v.visit(n_expr2)
+ if n_expr2.if_false_variable_ctx != null then
+ _if_false_variable_ctx = n_expr2.if_false_variable_ctx
+ else
+ _if_false_variable_ctx = v.variable_ctx
+ end
+
+ v.variable_ctx = old_var_ctx
+
v.check_conform_expr(n_expr, v.type_bool)
v.check_conform_expr(n_expr2, v.type_bool)
_stype = v.type_bool
+ _is_typed = true
end
end
redef class AAndExpr
- redef meth accept_typing(v)
+ redef fun accept_typing(v)
do
var old_var_ctx = v.variable_ctx
v.check_conform_expr(n_expr, v.type_bool)
v.check_conform_expr(n_expr2, v.type_bool)
_stype = v.type_bool
+ _is_typed = true
end
end
redef class ANotExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
v.check_conform_expr(n_expr, v.type_bool)
+
+ # Invert if_true/if_false information
+ _if_false_variable_ctx = n_expr._if_true_variable_ctx
+ _if_true_variable_ctx = n_expr._if_false_variable_ctx
+
_stype = v.type_bool
+ _is_typed = true
end
end
redef class AIntExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
_stype = v.type_int
-
+ _is_typed = true
end
end
redef class AFloatExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
_stype = v.type_float
+ _is_typed = true
end
end
redef class ACharExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
_stype = v.type_char
+ _is_typed = true
end
end
redef class AStringFormExpr
- readable attr _meth_with_native: MMMethod
- redef meth after_typing(v)
+ var _meth_with_native: nullable MMMethod
+ fun meth_with_native: MMMethod do return _meth_with_native.as(not null)
+ redef fun after_typing(v)
do
_stype = v.type_string
+ _is_typed = true
_meth_with_native = _stype.local_class.select_method(once "with_native".to_symbol)
if _meth_with_native == null then v.error(self, "{_stype} MUST have a with_native method.")
end
end
redef class ASuperstringExpr
- readable attr _meth_with_capacity: MMMethod
- readable attr _meth_add: MMMethod
- readable attr _meth_to_s: MMMethod
- readable attr _atype: MMType
- redef meth after_typing(v)
- do
- _stype = v.type_string
- _atype = v.type_array(_stype)
- _meth_with_capacity = _atype.local_class.select_method(once "with_capacity".to_symbol)
+ fun meth_with_capacity: MMMethod do return _meth_with_capacity.as(not null)
+ var _meth_with_capacity: nullable MMMethod
+ fun meth_add: MMMethod do return _meth_add.as(not null)
+ var _meth_add: nullable MMMethod
+ fun meth_to_s: MMMethod do return _meth_to_s.as(not null)
+ var _meth_to_s: nullable MMMethod
+ readable var _atype: nullable MMType
+ redef fun after_typing(v)
+ do
+ var stype = v.type_string
+ _stype = stype
+ var atype = v.type_array(stype)
+ _atype = atype
+ _meth_with_capacity = atype.local_class.select_method(once "with_capacity".to_symbol)
if _meth_with_capacity == null then v.error(self, "{_atype} MUST have a with_capacity method.")
- _meth_add = _atype.local_class.select_method(once "add".to_symbol)
+ _meth_add = atype.local_class.select_method(once "add".to_symbol)
if _meth_add == null then v.error(self, "{_atype} MUST have an add method.")
_meth_to_s = v.type_object.local_class.select_method(once "to_s".to_symbol)
if _meth_to_s == null then v.error(self, "Object MUST have a to_s method.")
+ _is_typed = true
end
end
redef class ANullExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
_stype = v.type_none
+ _is_typed = true
end
end
redef class AArrayExpr
- readable attr _meth_with_capacity: MMMethod
- readable attr _meth_add: MMMethod
+ fun meth_with_capacity: MMMethod do return _meth_with_capacity.as(not null)
+ var _meth_with_capacity: nullable MMMethod
+ fun meth_add: MMMethod do return _meth_add.as(not null)
+ var _meth_add: nullable MMMethod
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
var stype = v.check_conform_multiexpr(null, n_exprs)
- if stype == null then return
- do_typing(v, stype)
+ if stype != null then do_typing(v, stype)
end
- private meth do_typing(v: TypingVisitor, element_type: MMType)
+ private fun do_typing(v: TypingVisitor, element_type: MMType)
do
_stype = v.type_array(element_type)
if _meth_with_capacity == null then v.error(self, "{_stype} MUST have a with_capacity method.")
_meth_add = _stype.local_class.select_method(once "add".to_symbol)
if _meth_add == null then v.error(self, "{_stype} MUST have an add method.")
+
+ _is_typed = true
end
end
redef class ARangeExpr
- readable attr _meth_init: MMMethod
- redef meth after_typing(v)
+ fun meth_init: MMMethod do return _meth_init.as(not null)
+ var _meth_init: nullable MMMethod
+ redef fun after_typing(v)
do
+ if not v.check_expr(n_expr) or not v.check_expr(n_expr2) then return
var ntype = n_expr.stype
var ntype2 = n_expr2.stype
- if ntype == null or ntype == null then
- return
- end
if ntype < ntype2 then
ntype = ntype2
else if not ntype2 < ntype then
return
end
var dtype = v.type_discrete
- v.check_conform_expr(n_expr, dtype)
- v.check_conform_expr(n_expr2, dtype)
+ if not v.check_conform_expr(n_expr, dtype) or not v.check_conform_expr(n_expr2, dtype) then return
_stype = v.type_range(ntype)
+ _is_typed = true
end
end
redef class ACrangeExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
super
_meth_init = stype.local_class.select_method(once "init".to_symbol)
end
end
redef class AOrangeExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
super
_meth_init = stype.local_class.select_method(once "without_last".to_symbol)
redef class ASuperExpr
special ASuperInitCall
- # readable attr _prop: MMSrcMethod
- readable attr _init_in_superclass: MMMethod
- redef meth after_typing(v)
+ # readable var _prop: MMSrcMethod
+ readable var _init_in_superclass: nullable MMMethod
+ redef fun after_typing(v)
do
var precs: Array[MMLocalProperty] = v.local_property.prhe.direct_greaters
if not precs.is_empty then
_init_in_superclass = p
register_super_init_call(v, p)
if n_args.length > 0 then
- var signature = get_signature(v, v.self_var.stype, p, true)
+ var signature = get_signature(v, v.self_var.stype.as(not null), p, true)
_arguments = process_signature(v, signature, p.name, n_args.to_a)
end
else
return
end
- if precs.first.signature_for(v.self_var.stype).return_type != null then
+ if precs.first.signature_for(v.self_var.stype.as(not null)).return_type != null then
var stypes = new Array[MMType]
- var stype: MMType = null
+ var stype: nullable MMType = null
for prop in precs do
assert prop isa MMMethod
- var t = prop.signature_for(v.self_var.stype).return_type.for_module(v.module).adapt_to(v.local_property.signature.recv)
+ var t = prop.signature_for(v.self_var.stype.as(not null)).return_type.for_module(v.module).adapt_to(v.local_property.signature.recv)
stypes.add(t)
if stype == null or stype < t then
stype = t
end
end
for t in stypes do
- v.check_conform(self, t, stype)
+ v.check_conform(self, t, stype.as(not null))
end
_stype = stype
end
var p = v.local_property
assert p isa MMSrcMethod
_prop = p
+ _is_typed = true
end
end
redef class AAttrFormExpr
# Attribute accessed
- readable attr _prop: MMAttribute
+ readable var _prop: nullable MMAttribute
# Attribute type of the acceded attribute
- readable attr _attr_type: MMType
+ readable var _attr_type: nullable MMType
# Compute the attribute accessed
- private meth do_typing(v: TypingVisitor)
+ private fun do_typing(v: TypingVisitor)
do
if not v.check_expr(n_expr) then return
var type_recv = n_expr.stype
end
redef class AAttrExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
do_typing(v)
- if prop == null then
- return
- end
+ if prop == null then return
_stype = attr_type
+ _is_typed = true
end
end
redef class AAttrAssignExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
do_typing(v)
- if prop == null then
- return
- end
- v.check_conform_expr(n_value, attr_type)
+ if prop == null then return
+ if not v.check_conform_expr(n_value, attr_type) then return
+ _is_typed = true
end
end
redef class AAttrReassignExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
do_typing(v)
- if prop == null then
- return
+ if prop == null then return
+ var t = do_rvalue_typing(v, attr_type)
+ if t == null then return
+ v.check_conform(self, t, n_value.stype)
+ _is_typed = true
+ end
+end
+
+redef class AIssetAttrExpr
+ redef fun after_typing(v)
+ do
+ do_typing(v)
+ if prop == null then return
+ if attr_type.is_nullable then
+ v.error(self, "Error: isset on a nullable attribute.")
end
- do_lvalue_typing(v, attr_type)
+ _stype = v.type_bool
+ _is_typed = true
end
end
class AAbsAbsSendExpr
special PExpr
# The signature of the called property
- readable attr _prop_signature: MMSignature
+ readable var _prop_signature: nullable MMSignature
# The real arguments used (after star transformation) (once computed)
- readable attr _arguments: Array[PExpr]
+ readable var _arguments: nullable Array[PExpr]
# Check the conformity of a set of arguments `raw_args' to a signature.
- private meth process_signature(v: TypingVisitor, psig: MMSignature, name: Symbol, raw_args: Array[PExpr]): Array[PExpr]
+ private fun process_signature(v: TypingVisitor, psig: MMSignature, name: Symbol, raw_args: nullable Array[PExpr]): nullable Array[PExpr]
do
var par_vararg = psig.vararg_rank
var par_arity = psig.arity
end
# Check the conformity of a set of defined closures
- private meth process_closures(v: TypingVisitor, psig: MMSignature, name: Symbol, cd: Array[PClosureDef]): MMType
+ private fun process_closures(v: TypingVisitor, psig: MMSignature, name: Symbol, cd: nullable Array[PClosureDef]): nullable MMType
do
var t = psig.return_type
var cs = psig.closures # Declared closures
v.error(self, "Error: {name} requires {cs.length} blocks, {cd.length} found.")
else
# Initialize the break list if a value is required for breaks (ie. if the method is a function)
- var break_list: Array[ABreakExpr] = null
+ var break_list: nullable Array[ABreakExpr] = null
if t != null then break_list = new Array[ABreakExpr]
# Process each closure definition
class AAbsSendExpr
special AAbsAbsSendExpr
# Compute the called global property
- private meth do_typing(v: TypingVisitor, type_recv: MMType, is_implicit_self: Bool, recv_is_self: Bool, name: Symbol, raw_args: Array[PExpr], closure_defs: Array[PClosureDef])
+ private fun do_typing(v: TypingVisitor, type_recv: MMType, is_implicit_self: Bool, recv_is_self: Bool, name: Symbol, raw_args: nullable Array[PExpr], closure_defs: nullable Array[PClosureDef])
do
var prop = get_property(v, type_recv, is_implicit_self, name)
if prop == null then return
var sig = get_signature(v, type_recv, prop, recv_is_self)
- if sig == null then return
var args = process_signature(v, sig, prop.name, raw_args)
if args == null then return
var rtype = process_closures(v, sig, prop.name, closure_defs)
+ if rtype == null and sig.return_type != null then return
_prop = prop
_prop_signature = sig
_arguments = args
_return_type = rtype
end
- private meth get_property(v: TypingVisitor, type_recv: MMType, is_implicit_self: Bool, name: Symbol): MMMethod
+ private fun get_property(v: TypingVisitor, type_recv: MMType, is_implicit_self: Bool, name: Symbol): nullable MMMethod
do
- if type_recv == null then return null
var lc = type_recv.local_class
- var prop: MMMethod = null
+ var prop: nullable MMMethod = null
if lc.has_global_property_by_name(name) then prop = lc.select_method(name)
if prop == null and v.local_property.global.is_init then
var props = type_recv.local_class.super_methods_named(name)
end
# Get the signature for a local property and a receiver
- private meth get_signature(v: TypingVisitor, type_recv: MMType, prop: MMMethod, recv_is_self: Bool): MMSignature
+ private fun get_signature(v: TypingVisitor, type_recv: MMType, prop: MMMethod, recv_is_self: Bool): MMSignature
do
prop.global.check_visibility(v, self, v.module, recv_is_self)
var psig = prop.signature_for(type_recv)
end
# The invoked method (once computed)
- readable attr _prop: MMMethod
+ readable var _prop: nullable MMMethod
# The return type (if any) (once computed)
- readable attr _return_type: MMType
+ readable var _return_type: nullable MMType
end
# A possible call of constructor in a super class
# Could be an explicit call or with the 'super' keyword
class ASuperInitCall
special AAbsSendExpr
- private meth register_super_init_call(v: TypingVisitor, property: MMMethod)
+ private fun register_super_init_call(v: TypingVisitor, property: MMMethod)
do
if parent != v.top_block and self != v.top_block then
v.error(self, "Error: Constructor invocation {property} must not be in nested block.")
end
var cla = v.module[property.global.intro.local_class.global]
- var prev_class: MMLocalClass = null
- if not v.explicit_super_init_calls.is_empty then
- prev_class = v.explicit_super_init_calls.last.global.intro.local_class
+ var prev_class: nullable MMLocalClass = null
+ var esic = v.explicit_super_init_calls.as(not null)
+ if not esic.is_empty then
+ prev_class = esic.last.global.intro.local_class
end
var order = v.local_class.cshe.reverse_linear_extension
if cla == v.local_class then
if not last_is_found then
v.error(self, "Error: Constructor of {c} must be invoked before constructor of {prev_class}")
end
- v.explicit_super_init_calls.add(property)
+ esic.add(property)
break
end
end
redef class ANewExpr
special AAbsSendExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ if n_type._stype == null then return
var t = n_type.stype
- if t == null then return
if t.local_class.global.is_abstract then
v.error(self, "Error: try to instantiate abstract class {t.local_class}.")
return
if not prop.global.is_init then
v.error(self, "Error: {prop} is not a constructor.")
+ return
end
_stype = t
+ _is_typed = true
end
end
redef class ASendExpr
special ASuperInitCall
# Name of the invoked property
- meth name: Symbol is abstract
+ fun name: Symbol is abstract
# Raw arguments used (withour star transformation)
- meth raw_arguments: Array[PExpr] is abstract
+ fun raw_arguments: nullable Array[PExpr] is abstract
# Closure definitions
- meth closure_defs: Array[PClosureDef] do return null
+ fun closure_defs: nullable Array[PClosureDef] do return null
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
do_all_typing(v)
end
- private meth do_all_typing(v: TypingVisitor)
+ private fun do_all_typing(v: TypingVisitor)
do
if not v.check_expr(n_expr) then return
do_typing(v, n_expr.stype, n_expr.is_implicit_self, n_expr.is_self, name, raw_arguments, closure_defs)
- if prop == null then return
+ if _prop == null then return
+ var prop = _prop.as(not null)
if prop.global.is_init then
if not v.local_property.global.is_init then
end
_stype = return_type
+ _is_typed = true
end
end
class ASendReassignExpr
special ASendExpr
special AReassignFormExpr
- readable attr _read_prop: MMMethod
- redef meth do_all_typing(v)
+ readable var _read_prop: nullable MMMethod
+ redef fun do_all_typing(v)
do
if not v.check_expr(n_expr) then return
var raw_args = raw_arguments
do_typing(v, n_expr.stype, n_expr.is_implicit_self, n_expr.is_self, name, raw_args, null)
+ var prop = _prop
if prop == null then return
if prop.global.is_init then
if not v.local_property.global.is_init then
v.error(self, "Error: constructor {prop} is not invoken on 'self'.")
end
end
- var t = prop.signature_for(n_expr.stype).return_type
+ var t = prop.signature_for(n_expr.stype).return_type.as(not null)
if not n_expr.is_self then t = t.not_for_self
- do_lvalue_typing(v, t)
+ var t2 = do_rvalue_typing(v, t)
+ if t2 == null then return
+ v.check_conform(self, t2, n_value.stype)
_read_prop = prop
var old_args = arguments
raw_args.add(n_value)
do_typing(v, n_expr.stype, n_expr.is_implicit_self, n_expr.is_self, "{name}=".to_symbol, raw_args, null)
- if prop == null then return
if prop.global.is_init then
if not v.local_property.global.is_init then
v.error(self, "Error: try to invoke constructor {prop} in a method.")
end
_arguments = old_args # FIXME: What if star parameters do not match betwen the two methods?
+ _is_typed = true
end
end
redef class ABinopExpr
- redef meth raw_arguments do return [n_expr2]
+ redef fun raw_arguments do return [n_expr2]
end
redef class AEqExpr
- redef meth name do return once "==".to_symbol
+ redef fun name do return once "==".to_symbol
+ redef fun after_typing(v)
+ do
+ super
+ if not is_typed then return
+ if n_expr.stype isa MMTypeNone and not n_expr2.stype.is_nullable or
+ n_expr2.stype isa MMTypeNone and not n_expr.stype.is_nullable then
+ v.warning(self, "Warning: comparaison between null and a non nullable value.")
+ end
+
+ if n_expr.stype isa MMTypeNone then
+ try_to_isa(v, n_expr2)
+ else if n_expr2.stype isa MMTypeNone then
+ try_to_isa(v, n_expr)
+ end
+ end
+
+ private fun try_to_isa(v: TypingVisitor, n: PExpr)
+ do
+ var variable = n.its_variable
+ if variable != null then
+ _if_false_variable_ctx = v.variable_ctx.sub_with(self, variable, n.stype.as_notnull)
+ end
+ end
end
redef class ANeExpr
- redef meth name do return once "!=".to_symbol
+ redef fun name do return once "!=".to_symbol
+ redef fun after_typing(v)
+ do
+ super
+ if not is_typed then return
+ if n_expr.stype isa MMTypeNone and not n_expr2.stype.is_nullable or
+ n_expr2.stype isa MMTypeNone and not n_expr.stype.is_nullable then
+ v.warning(self, "Warning: comparaison between null and a non nullable value.")
+ end
+
+ if n_expr.stype isa MMTypeNone then
+ try_to_isa(v, n_expr2)
+ else if n_expr2.stype isa MMTypeNone then
+ try_to_isa(v, n_expr)
+ end
+ end
+
+ private fun try_to_isa(v: TypingVisitor, n: PExpr)
+ do
+ var variable = n.its_variable
+ if variable != null then
+ _if_true_variable_ctx = v.variable_ctx.sub_with(self, variable, n.stype.as_notnull)
+ end
+ end
end
redef class ALtExpr
- redef meth name do return once "<".to_symbol
+ redef fun name do return once "<".to_symbol
end
redef class ALeExpr
- redef meth name do return once "<=".to_symbol
+ redef fun name do return once "<=".to_symbol
end
redef class AGtExpr
- redef meth name do return once ">".to_symbol
+ redef fun name do return once ">".to_symbol
end
redef class AGeExpr
- redef meth name do return once ">=".to_symbol
+ redef fun name do return once ">=".to_symbol
end
redef class APlusExpr
- redef meth name do return once "+".to_symbol
+ redef fun name do return once "+".to_symbol
end
redef class AMinusExpr
- redef meth name do return once "-".to_symbol
+ redef fun name do return once "-".to_symbol
end
redef class AStarshipExpr
- redef meth name do return once "<=>".to_symbol
+ redef fun name do return once "<=>".to_symbol
end
redef class AStarExpr
- redef meth name do return once "*".to_symbol
+ redef fun name do return once "*".to_symbol
end
redef class ASlashExpr
- redef meth name do return once "/".to_symbol
+ redef fun name do return once "/".to_symbol
end
redef class APercentExpr
- redef meth name do return once "%".to_symbol
+ redef fun name do return once "%".to_symbol
end
redef class AUminusExpr
- redef meth name do return once "unary -".to_symbol
- redef meth raw_arguments do return null
+ redef fun name do return once "unary -".to_symbol
+ redef fun raw_arguments do return null
end
redef class ACallFormExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
- if n_expr != null and n_expr.is_implicit_self then
+ if n_expr.is_implicit_self then
var name = n_id.to_symbol
var variable = v.variable_ctx[name]
if variable != null then
if variable isa ClosureVariable then
- var n = new AClosureCallExpr(n_id, n_args, n_closure_defs)
+ var n = new AClosureCallExpr.init_aclosurecallexpr(n_id, n_args, n_closure_defs)
replace_with(n)
- n.variable = variable
+ n._variable = variable
n.after_typing(v)
return
else
if not n_args.is_empty then
v.error(self, "Error: {name} is variable, not a function.")
+ return
end
var vform = variable_create(variable)
- vform.variable = variable
+ vform._variable = variable
replace_with(vform)
vform.after_typing(v)
return
super
end
- redef meth closure_defs
+ redef fun closure_defs
do
- if n_closure_defs == null or n_closure_defs.is_empty then
+ if n_closure_defs.is_empty then
return null
else
return n_closure_defs.to_a
end
# Create a variable acces corresponding to the call form
- meth variable_create(variable: Variable): AVarFormExpr is abstract
+ fun variable_create(variable: Variable): AVarFormExpr is abstract
end
redef class ACallExpr
- redef meth variable_create(variable)
+ redef fun variable_create(variable)
do
return new AVarExpr.init_avarexpr(n_id)
end
- redef meth name do return n_id.to_symbol
- redef meth raw_arguments do return n_args.to_a
+ redef fun name do return n_id.to_symbol
+ redef fun raw_arguments do return n_args.to_a
end
redef class ACallAssignExpr
- redef meth variable_create(variable)
+ redef fun variable_create(variable)
do
return new AVarAssignExpr.init_avarassignexpr(n_id, n_assign, n_value)
end
- redef meth name do return (n_id.text + "=").to_symbol
- redef meth raw_arguments do
+ redef fun name do return (n_id.text + "=").to_symbol
+ redef fun raw_arguments do
var res = n_args.to_a
res.add(n_value)
return res
redef class ACallReassignExpr
special ASendReassignExpr
- redef meth variable_create(variable)
+ redef fun variable_create(variable)
do
return new AVarReassignExpr.init_avarreassignexpr(n_id, n_assign_op, n_value)
end
- redef meth name do return n_id.to_symbol
- redef meth raw_arguments do return n_args.to_a
+ redef fun name do return n_id.to_symbol
+ redef fun raw_arguments do return n_args.to_a
end
redef class ABraExpr
- redef meth name do return once "[]".to_symbol
- redef meth raw_arguments do return n_args.to_a
+ redef fun name do return once "[]".to_symbol
+ redef fun raw_arguments do return n_args.to_a
end
redef class ABraAssignExpr
- redef meth name do return once "[]=".to_symbol
- redef meth raw_arguments do
+ redef fun name do return once "[]=".to_symbol
+ redef fun raw_arguments do
var res = n_args.to_a
res.add(n_value)
return res
redef class ABraReassignExpr
special ASendReassignExpr
- redef meth name do return once "[]".to_symbol
- redef meth raw_arguments do return n_args.to_a
+ redef fun name do return once "[]".to_symbol
+ redef fun raw_arguments do return n_args.to_a
end
redef class AInitExpr
- redef meth name do return once "init".to_symbol
- redef meth raw_arguments do return n_args.to_a
+ redef fun name do return once "init".to_symbol
+ redef fun raw_arguments do return n_args.to_a
end
redef class AClosureCallExpr
- redef meth after_typing(v)
+special AAbsAbsSendExpr
+ var _variable: nullable ClosureVariable
+ redef fun variable do return _variable.as(not null)
+
+ redef fun after_typing(v)
do
var va = variable
+ if va.closure.is_break then v.variable_ctx.unreash = true
var sig = va.closure.signature
var args = process_signature(v, sig, n_id.to_symbol, n_args.to_a)
- if closure_defs != null then
- process_closures(v, sig, n_id.to_symbol, closure_defs)
+ if not n_closure_defs.is_empty then
+ process_closures(v, sig, n_id.to_symbol, n_closure_defs.to_a)
end
if args == null then return
- _prop = null
_prop_signature = sig
_arguments = args
_stype = sig.return_type
+ _is_typed = true
end
end
redef class PClosureDef
+ var _closure: nullable MMClosure
+ redef fun closure do return _closure.as(not null)
+
# The corresponding escapable object
- readable attr _escapable: EscapableBlock
+ readable var _escapable: nullable EscapableBlock
- attr _accept_typing2: Bool
- redef meth accept_typing(v)
+ var _accept_typing2: Bool = false
+ redef fun accept_typing(v)
do
# Typing is deferred, wait accept_typing2(v)
if _accept_typing2 then super
end
- private meth accept_typing2(v: TypingVisitor, esc: EscapableClosure) is abstract
+ private fun accept_typing2(v: TypingVisitor, esc: EscapableClosure) is abstract
end
redef class AClosureDef
- redef meth accept_typing2(v, esc)
+ redef fun accept_typing2(v, esc)
do
_escapable = esc
return
end
- closure = esc.closure
+ _closure = esc.closure
- v.variable_ctx = v.variable_ctx.sub
+ var old_var_ctx = v.variable_ctx
+ var old_base_var_ctx = v.base_variable_ctx
+ v.base_variable_ctx = v.variable_ctx
+ v.variable_ctx = v.variable_ctx.sub(self)
variables = new Array[AutoVariable]
for i in [0..n_id.length[ do
var va = new AutoVariable(n_id[i].to_symbol, self)
_accept_typing2 = true
accept_typing(v)
+
+ if v.variable_ctx.unreash == false then
+ if closure.signature.return_type != null then
+ v.error(self, "Control error: Reached end of block (a 'continue' with a value was expected).")
+ else if closure.is_break then
+ v.error(self, "Control error: Reached end of break block (a 'break' was expected).")
+ end
+ end
+ v.variable_ctx = old_var_ctx
+ v.base_variable_ctx = old_base_var_ctx
+ end
+end
+
+class ATypeCheckExpr
+special PExpr
+ private fun check_expr_cast(v: TypingVisitor, n_expr: PExpr, n_type: PType)
+ do
+ if not v.check_expr(n_expr) then return
+ var etype = n_expr.stype
+ var ttype = n_type.stype
+ if etype == ttype then
+ v.warning(self, "Warning: Expression is already a {ttype}.")
+ else if etype < ttype then
+ v.warning(self, "Warning: Expression is already a {ttype} since it is a {etype}.")
+ else if etype.is_nullable and etype.as_notnull == ttype then
+ if ttype isa MMTypeFormal and ttype.bound.is_nullable then
+ # No warning in this case since with
+ # type T: nullable A
+ # var x: nullable T
+ # 'x.as(not null)' != 'x.as(T)'
+ # 'x != null' != 'x isa T'
+ else if self isa AIsaExpr then
+ v.warning(self, "Warning: Prefer '!= null'.")
+ else
+ v.warning(self, "Warning: Prefer '.as(not null)'.")
+ end
+ end
end
end
redef class AIsaExpr
- redef meth after_typing(v)
+special ATypeCheckExpr
+ redef fun after_typing(v)
do
+ check_expr_cast(v, n_expr, n_type)
var variable = n_expr.its_variable
if variable != null then
- _if_true_variable_ctx = v.variable_ctx.sub_with(variable, n_type.stype)
+ _if_true_variable_ctx = v.variable_ctx.sub_with(self, variable, n_type.stype)
end
_stype = v.type_bool
+ _is_typed = true
end
end
redef class AAsCastExpr
- redef meth after_typing(v)
+special ATypeCheckExpr
+ redef fun after_typing(v)
do
- v.check_expr(n_expr)
+ check_expr_cast(v, n_expr, n_type)
_stype = n_type.stype
+ _is_typed = _stype != null
+ end
+end
+
+redef class AAsNotnullExpr
+ redef fun after_typing(v)
+ do
+ if not v.check_expr(n_expr) then return
+ var t = n_expr.stype
+ if t isa MMTypeNone then
+ v.error(n_expr, "Type error: 'as(not null)' on 'null' value.")
+ return
+ else if not t.is_nullable then
+ v.warning(n_expr, "Warning: 'as(not null)' on non nullable type.")
+ end
+ _stype = n_expr.stype.as_notnull
+ _is_typed = true
end
end
redef class AProxyExpr
- redef meth after_typing(v)
+ redef fun after_typing(v)
do
+ if not n_expr.is_typed then return
+ _is_typed = true
+ if n_expr.is_statement then return
_stype = n_expr.stype
end
end
+
+redef class AOnceExpr
+ redef fun accept_typing(v)
+ do
+ if v.once_count > 0 then
+ v.warning(self, "Useless once in a once expression.")
+ end
+ v.once_count = v.once_count + 1
+
+ super
+
+ v.once_count = v.once_count - 1
+ end
+end
+
nitlanguage / nit.git / blobdiff