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Unified Diff: runtime/vm/parser.cc

Issue 16780008: Reified metadata in the VM (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 7 years, 6 months ago
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Index: runtime/vm/parser.cc
===================================================================
--- runtime/vm/parser.cc (revision 23883)
+++ runtime/vm/parser.cc (working copy)
@@ -511,6 +511,7 @@
has_var = false;
has_factory = false;
has_operator = false;
+ metadata_pos = -1;
operator_token = Token::kILLEGAL;
type = NULL;
name_pos = 0;
@@ -543,6 +544,7 @@
bool has_var;
bool has_factory;
bool has_operator;
+ intptr_t metadata_pos;
Token::Kind operator_token;
const AbstractType* type;
intptr_t name_pos;
@@ -647,8 +649,8 @@
return fields_;
}
- RawClass* clazz() const {
- return clazz_.raw();
+ const Class& clazz() const {
+ return clazz_;
}
const String& class_name() const {
@@ -841,6 +843,63 @@
}
+RawObject* Parser::ParseMetadata(const Class& cls, intptr_t token_pos) {
+ Isolate* isolate = Isolate::Current();
+ StackZone zone(isolate);
+ LongJump* base = isolate->long_jump_base();
+ LongJump jump;
+ isolate->set_long_jump_base(&jump);
+ if (setjmp(*jump.Set()) == 0) {
+ const Script& script = Script::Handle(cls.script());
+ const Library& lib = Library::Handle(cls.library());
+ Parser parser(script, lib, token_pos);
+ parser.set_current_class(cls);
+ return parser.EvaluateMetadata();
+ } else {
+ Error& error = Error::Handle();
+ error = isolate->object_store()->sticky_error();
+ isolate->object_store()->clear_sticky_error();
+ isolate->set_long_jump_base(base);
+ return error.raw();
+ }
+ UNREACHABLE();
+ return Object::null();
+}
+
+
+RawArray* Parser::EvaluateMetadata() {
+ if (CurrentToken() != Token::kAT) {
+ ErrorMsg("Metadata character '@' expected");
+ }
+ GrowableObjectArray& meta_values =
+ GrowableObjectArray::Handle(GrowableObjectArray::New());
+ while (CurrentToken() == Token::kAT) {
+ ConsumeToken();
+ intptr_t expr_pos = TokenPos();
+ if (!IsIdentifier()) {
+ ExpectIdentifier("identifier expected");
+ }
+ AstNode* expr = NULL;
+ if ((LookaheadToken(1) == Token::kLPAREN) ||
+ ((LookaheadToken(1) == Token::kPERIOD) &&
+ (LookaheadToken(3) == Token::kLPAREN)) ||
+ ((LookaheadToken(1) == Token::kPERIOD) &&
+ (LookaheadToken(3) == Token::kPERIOD) &&
+ (LookaheadToken(5) == Token::kLPAREN))) {
+ expr = ParseNewOperator(Token::kCONST);
+ } else {
+ expr = ParsePrimary();
+ }
+ if (expr->EvalConstExpr() == NULL) {
+ ErrorMsg(expr_pos, "expression must be a compile-time constant");
+ }
+ const Instance& val = EvaluateConstExpr(expr);
+ meta_values.Add(val);
+ }
+ return Array::MakeArray(meta_values);
+}
+
+
// TODO(regis): Since a const variable is implicitly final,
// rename ParseStaticConstGetter to ParseStaticFinalGetter and
// rename kConstImplicitGetter to kImplicitFinalGetter.
@@ -2824,6 +2883,9 @@
method_pos));
func.set_result_type(*method->type);
func.set_end_token_pos(method_end_pos);
+ if (method->metadata_pos > 0) {
+ library_.AddFunctionMetadata(func, method->metadata_pos);
+ }
// If this method is a redirecting factory, set the redirection information.
if (!redirection_type.IsNull()) {
@@ -2911,6 +2973,9 @@
class_field.set_type(*field->type);
class_field.set_has_initializer(has_initializer);
members->AddField(class_field);
+ if (field->metadata_pos >= 0) {
+ library_.AddFieldMetadata(class_field, field->metadata_pos);
+ }
// For static const fields, set value to "uninitialized" and
// create a kConstImplicitGetter getter method.
@@ -3001,10 +3066,12 @@
}
-void Parser::ParseClassMemberDefinition(ClassDesc* members) {
+void Parser::ParseClassMemberDefinition(ClassDesc* members,
+ intptr_t metadata_pos) {
TRACE_PARSER("ParseClassMemberDefinition");
MemberDesc member;
current_member_ = &member;
+ member.metadata_pos = metadata_pos;
if ((CurrentToken() == Token::kEXTERNAL) &&
(LookaheadToken(1) != Token::kLPAREN)) {
ConsumeToken();
@@ -3217,7 +3284,8 @@
}
-void Parser::ParseClassDeclaration(const GrowableObjectArray& pending_classes) {
+void Parser::ParseClassDeclaration(const GrowableObjectArray& pending_classes,
+ intptr_t metadata_pos) {
TRACE_PARSER("ParseClassDeclaration");
bool is_patch = false;
bool is_abstract = false;
@@ -3359,6 +3427,9 @@
cls.set_is_patch();
}
pending_classes.Add(cls, Heap::kOld);
+ if (metadata_pos >= 0) {
+ library_.AddClassMetadata(cls, metadata_pos);
+ }
if (CurrentToken() != Token::kLBRACE) {
ErrorMsg("{ expected");
@@ -3379,8 +3450,8 @@
}
ExpectToken(Token::kLBRACE);
while (CurrentToken() != Token::kRBRACE) {
- SkipMetadata();
- ParseClassMemberDefinition(&members);
+ intptr_t metadata_pos = SkipMetadata();
+ ParseClassMemberDefinition(&members, metadata_pos);
}
ExpectToken(Token::kRBRACE);
@@ -3719,7 +3790,11 @@
}
-void Parser::SkipMetadata() {
+intptr_t Parser::SkipMetadata() {
+ if (CurrentToken() != Token::kAT) {
+ return -1;
+ }
+ intptr_t metadata_pos = TokenPos();
while (CurrentToken() == Token::kAT) {
ConsumeToken();
ExpectIdentifier("identifier expected");
@@ -3735,6 +3810,7 @@
SkipToMatchingParenthesis();
}
}
+ return metadata_pos;
}
@@ -3973,7 +4049,8 @@
}
-void Parser::ParseTopLevelVariable(TopLevel* top_level) {
+void Parser::ParseTopLevelVariable(TopLevel* top_level,
+ intptr_t metadata_pos) {
TRACE_PARSER("ParseTopLevelVariable");
const bool is_const = (CurrentToken() == Token::kCONST);
// Const fields are implicitly final.
@@ -4013,6 +4090,9 @@
field.set_value(Instance::Handle(Instance::null()));
top_level->fields.Add(field);
library_.AddObject(field, var_name);
+ if (metadata_pos >= 0) {
+ library_.AddFieldMetadata(field, metadata_pos);
+ }
if (CurrentToken() == Token::kASSIGN) {
ConsumeToken();
Instance& field_value = Instance::Handle(Object::sentinel().raw());
@@ -4052,7 +4132,8 @@
}
-void Parser::ParseTopLevelFunction(TopLevel* top_level) {
+void Parser::ParseTopLevelFunction(TopLevel* top_level,
+ intptr_t metadata_pos) {
TRACE_PARSER("ParseTopLevelFunction");
AbstractType& result_type = Type::Handle(Type::DynamicType());
const bool is_static = true;
@@ -4137,10 +4218,14 @@
} else {
library_.ReplaceObject(func, func_name);
}
+ if (metadata_pos >= 0) {
+ library_.AddFunctionMetadata(func, metadata_pos);
+ }
}
-void Parser::ParseTopLevelAccessor(TopLevel* top_level) {
+void Parser::ParseTopLevelAccessor(TopLevel* top_level,
+ intptr_t metadata_pos) {
TRACE_PARSER("ParseTopLevelAccessor");
const bool is_static = true;
bool is_external = false;
@@ -4258,6 +4343,9 @@
} else {
library_.ReplaceObject(func, accessor_name);
}
+ if (metadata_pos >= 0) {
+ library_.AddFunctionMetadata(func, metadata_pos);
+ }
}
@@ -4528,27 +4616,27 @@
const Class& cls = Class::Handle(isolate());
while (true) {
set_current_class(cls); // No current class.
- SkipMetadata();
+ intptr_t metadata_pos = SkipMetadata();
if (CurrentToken() == Token::kCLASS) {
- ParseClassDeclaration(pending_classes);
+ ParseClassDeclaration(pending_classes, metadata_pos);
} else if ((CurrentToken() == Token::kTYPEDEF) &&
(LookaheadToken(1) != Token::kLPAREN)) {
set_current_class(toplevel_class);
ParseTypedef(pending_classes);
} else if ((CurrentToken() == Token::kABSTRACT) &&
(LookaheadToken(1) == Token::kCLASS)) {
- ParseClassDeclaration(pending_classes);
+ ParseClassDeclaration(pending_classes, metadata_pos);
} else if (is_patch_source() && IsLiteral("patch") &&
(LookaheadToken(1) == Token::kCLASS)) {
- ParseClassDeclaration(pending_classes);
+ ParseClassDeclaration(pending_classes, metadata_pos);
} else {
set_current_class(toplevel_class);
if (IsVariableDeclaration()) {
- ParseTopLevelVariable(&top_level);
+ ParseTopLevelVariable(&top_level, metadata_pos);
} else if (IsFunctionDeclaration()) {
- ParseTopLevelFunction(&top_level);
+ ParseTopLevelFunction(&top_level, metadata_pos);
} else if (IsTopLevelAccessor()) {
- ParseTopLevelAccessor(&top_level);
+ ParseTopLevelAccessor(&top_level, metadata_pos);
} else if (CurrentToken() == Token::kEOS) {
break;
} else {
@@ -9146,12 +9234,11 @@
}
-AstNode* Parser::ParseNewOperator() {
+AstNode* Parser::ParseNewOperator(Token::Kind op_kind) {
TRACE_PARSER("ParseNewOperator");
const intptr_t new_pos = TokenPos();
- ASSERT((CurrentToken() == Token::kNEW) || (CurrentToken() == Token::kCONST));
- bool is_const = (CurrentToken() == Token::kCONST);
- ConsumeToken();
+ ASSERT((op_kind == Token::kNEW) || (op_kind == Token::kCONST));
+ bool is_const = (op_kind == Token::kCONST);
if (!IsIdentifier()) {
ErrorMsg("type name expected");
}
@@ -9619,7 +9706,8 @@
} else if (CurrentToken() == Token::kSTRING) {
primary = ParseStringLiteral();
} else if (CurrentToken() == Token::kNEW) {
- primary = ParseNewOperator();
+ ConsumeToken();
+ primary = ParseNewOperator(Token::kNEW);
} else if (CurrentToken() == Token::kCONST) {
if ((LookaheadToken(1) == Token::kLT) ||
(LookaheadToken(1) == Token::kLBRACK) ||
@@ -9627,7 +9715,8 @@
(LookaheadToken(1) == Token::kLBRACE)) {
primary = ParseCompoundLiteral();
} else {
- primary = ParseNewOperator();
+ ConsumeToken();
+ primary = ParseNewOperator(Token::kCONST);
}
} else if (CurrentToken() == Token::kLT ||
CurrentToken() == Token::kLBRACK ||
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