[vala/wip/transform: 38/99] Split CodeTrasformer into CCodeTransformer
- From: Luca Bruno <lucabru src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [vala/wip/transform: 38/99] Split CodeTrasformer into CCodeTransformer
- Date: Sun, 9 Feb 2014 22:41:30 +0000 (UTC)
commit c2322a2b6be1ce419f37e1884c527841d781f0cc
Author: Luca Bruno <lucabru src gnome org>
Date: Wed Jan 4 19:38:09 2012 +0100
Split CodeTrasformer into CCodeTransformer
codegen/Makefile.am | 1 +
codegen/valaccodetransformer.vala | 444 ++++++++++++++++++++++++++++++++++
codegen/valagvarianttransformer.vala | 2 +-
vala/valacodetransformer.vala | 417 -------------------------------
4 files changed, 446 insertions(+), 418 deletions(-)
---
diff --git a/codegen/Makefile.am b/codegen/Makefile.am
index ddb017f..d75f039 100644
--- a/codegen/Makefile.am
+++ b/codegen/Makefile.am
@@ -26,6 +26,7 @@ libvala_la_VALASOURCES = \
valaccodemethodcallmodule.vala \
valaccodemethodmodule.vala \
valaccodestructmodule.vala \
+ valaccodetransformer.vala \
valaclassregisterfunction.vala \
valactype.vala \
valaenumregisterfunction.vala \
diff --git a/codegen/valaccodetransformer.vala b/codegen/valaccodetransformer.vala
new file mode 100644
index 0000000..f9ef7ff
--- /dev/null
+++ b/codegen/valaccodetransformer.vala
@@ -0,0 +1,444 @@
+/* valaccodetransformer.vala
+ *
+ * Copyright (C) 2011 Luca Bruno
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Author:
+ * Luca Bruno <lucabru src gnome org>
+ */
+
+/**
+ * Code visitor for simplyfing the code tree for the C codegen.
+ */
+public class Vala.CCodeTransformer : CodeTransformer {
+ public override void visit_source_file (SourceFile source_file) {
+ source_file.accept_children (this);
+ }
+
+ public override void visit_namespace (Namespace ns) {
+ ns.accept_children (this);
+ }
+
+ public override void visit_class (Class cl) {
+ cl.accept_children (this);
+ }
+
+ public override void visit_struct (Struct st) {
+ st.accept_children (this);
+ }
+
+ public override void visit_interface (Interface iface) {
+ iface.accept_children (this);
+ }
+
+ public override void visit_enum (Enum en) {
+ en.accept_children (this);
+ }
+
+ public override void visit_enum_value (EnumValue ev) {
+ ev.accept_children (this);
+ }
+
+ public override void visit_error_domain (ErrorDomain edomain) {
+ edomain.accept_children (this);
+ }
+
+ public override void visit_error_code (ErrorCode ecode) {
+ ecode.accept_children (this);
+ }
+
+ public override void visit_delegate (Delegate d) {
+ d.accept_children (this);
+ }
+
+ public override void visit_constant (Constant c) {
+ c.accept_children (this);
+ }
+
+ public override void visit_field (Field f) {
+ f.accept_children (this);
+ }
+
+ public override void visit_method (Method m) {
+ m.accept_children (this);
+ }
+
+ public override void visit_creation_method (CreationMethod m) {
+ m.accept_children (this);
+ }
+
+ public override void visit_formal_parameter (Parameter p) {
+ p.accept_children (this);
+ }
+
+ public override void visit_property (Property prop) {
+ prop.accept_children (this);
+ }
+
+ public override void visit_property_accessor (PropertyAccessor acc) {
+ acc.accept_children (this);
+ }
+
+ public override void visit_signal (Signal sig) {
+ sig.accept_children (this);
+ }
+
+ public override void visit_constructor (Constructor c) {
+ c.accept_children (this);
+ }
+
+ public override void visit_destructor (Destructor d) {
+ d.accept_children (this);
+ }
+
+ public override void visit_block (Block b) {
+ b.accept_children (this);
+ }
+
+ public override void visit_declaration_statement (DeclarationStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_local_variable (LocalVariable local) {
+ local.accept_children (this);
+ }
+
+ public override void visit_initializer_list (InitializerList list) {
+ list.accept_children (this);
+ }
+
+ public override void visit_expression_statement (ExpressionStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_if_statement (IfStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_switch_statement (SwitchStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_switch_section (SwitchSection section) {
+ section.accept_children (this);
+ }
+
+ public override void visit_switch_label (SwitchLabel label) {
+ label.accept_children (this);
+ }
+
+ bool always_true (Expression condition) {
+ var literal = condition as BooleanLiteral;
+ return (literal != null && literal.value);
+ }
+
+ bool always_false (Expression condition) {
+ var literal = condition as BooleanLiteral;
+ return (literal != null && !literal.value);
+ }
+
+ public override void visit_loop (Loop loop) {
+ loop.accept_children (this);
+ }
+
+ public override void visit_while_statement (WhileStatement stmt) {
+ // convert to simple loop
+
+ if (always_true (stmt.condition)) {
+ // do not generate if block if condition is always true
+ } else if (always_false (stmt.condition)) {
+ // do not generate if block if condition is always false
+ stmt.body.insert_statement (0, new BreakStatement (stmt.condition.source_reference));
+ } else {
+ var if_condition = new UnaryExpression (UnaryOperator.LOGICAL_NEGATION,
stmt.condition, stmt.condition.source_reference);
+ var true_block = new Block (stmt.condition.source_reference);
+ true_block.add_statement (new BreakStatement (stmt.condition.source_reference));
+ var if_stmt = new IfStatement (if_condition, true_block, null,
stmt.condition.source_reference);
+ stmt.body.insert_statement (0, if_stmt);
+ }
+
+ var loop = new Loop (stmt.body, stmt.source_reference);
+
+ var parent_block = (Block) stmt.parent_node;
+ context.analyzer.replaced_nodes.add (stmt);
+ parent_block.replace_statement (stmt, loop);
+
+ stmt.body.checked = false;
+ check (loop);
+ }
+
+ public override void visit_do_statement (DoStatement stmt) {
+ // convert to simple loop
+
+ // do not generate variable and if block if condition is always true
+ if (always_true (stmt.condition)) {
+ var loop = new Loop (stmt.body, stmt.source_reference);
+
+ var parent_block = (Block) stmt.parent_node;
+ context.analyzer.replaced_nodes.add (stmt);
+ parent_block.replace_statement (stmt, loop);
+
+ check (loop);
+ return;
+ }
+
+ var block = new Block (stmt.source_reference);
+
+ var first_local = new LocalVariable (context.analyzer.bool_type.copy (), stmt.get_temp_name
(), new BooleanLiteral (true, stmt.source_reference), stmt.source_reference);
+ block.add_statement (new DeclarationStatement (first_local, stmt.source_reference));
+
+ var if_condition = new UnaryExpression (UnaryOperator.LOGICAL_NEGATION, stmt.condition,
stmt.condition.source_reference);
+ var true_block = new Block (stmt.condition.source_reference);
+ true_block.add_statement (new BreakStatement (stmt.condition.source_reference));
+ var if_stmt = new IfStatement (if_condition, true_block, null,
stmt.condition.source_reference);
+
+ var condition_block = new Block (stmt.condition.source_reference);
+ condition_block.add_statement (if_stmt);
+
+ var first_if = new IfStatement (new UnaryExpression (UnaryOperator.LOGICAL_NEGATION, new
MemberAccess.simple (first_local.name, stmt.source_reference), stmt.source_reference), condition_block, null,
stmt.source_reference);
+ stmt.body.insert_statement (0, first_if);
+ var first_assign = new ExpressionStatement (new Assignment (new MemberAccess.simple
(first_local.name, stmt.source_reference), new BooleanLiteral (false, stmt.source_reference),
AssignmentOperator.SIMPLE, stmt.source_reference), stmt.source_reference);
+ stmt.body.insert_statement (1, first_assign);
+
+ block.add_statement (new Loop (stmt.body, stmt.source_reference));
+
+ var parent_block = (Block) stmt.parent_node;
+ context.analyzer.replaced_nodes.add (stmt);
+ parent_block.replace_statement (stmt, block);
+
+ stmt.body.checked = false;
+ check (block);
+ }
+
+ public override void visit_for_statement (ForStatement stmt) {
+ // convert to simple loop
+
+ var block = new Block (stmt.source_reference);
+
+ // initializer
+ foreach (var init_expr in stmt.get_initializer ()) {
+ block.add_statement (new ExpressionStatement (init_expr, init_expr.source_reference));
+ }
+
+ // do not generate if block if condition is always true
+ if (stmt.condition == null || always_true (stmt.condition)) {
+ } else if (always_false (stmt.condition)) {
+ // do not generate if block if condition is always false
+ stmt.body.insert_statement (0, new BreakStatement (stmt.condition.source_reference));
+ } else {
+ // condition
+ var if_condition = new UnaryExpression (UnaryOperator.LOGICAL_NEGATION,
stmt.condition, stmt.condition.source_reference);
+ var true_block = new Block (stmt.condition.source_reference);
+ true_block.add_statement (new BreakStatement (stmt.condition.source_reference));
+ var if_stmt = new IfStatement (if_condition, true_block, null,
stmt.condition.source_reference);
+ stmt.body.insert_statement (0, if_stmt);
+ }
+
+ // iterator
+ var first_local = new LocalVariable (context.analyzer.bool_type.copy (), stmt.get_temp_name
(), new BooleanLiteral (true, stmt.source_reference), stmt.source_reference);
+ block.add_statement (new DeclarationStatement (first_local, stmt.source_reference));
+
+ var iterator_block = new Block (stmt.source_reference);
+ foreach (var it_expr in stmt.get_iterator ()) {
+ iterator_block.add_statement (new ExpressionStatement (it_expr,
it_expr.source_reference));
+ }
+
+ var first_if = new IfStatement (new UnaryExpression (UnaryOperator.LOGICAL_NEGATION, new
MemberAccess.simple (first_local.name, stmt.source_reference), stmt.source_reference), iterator_block, null,
stmt.source_reference);
+ stmt.body.insert_statement (0, first_if);
+ stmt.body.insert_statement (1, new ExpressionStatement (new Assignment (new
MemberAccess.simple (first_local.name, stmt.source_reference), new BooleanLiteral (false,
stmt.source_reference), AssignmentOperator.SIMPLE, stmt.source_reference), stmt.source_reference));
+
+ block.add_statement (new Loop (stmt.body, stmt.source_reference));
+
+ var parent_block = (Block) stmt.parent_node;
+ context.analyzer.replaced_nodes.add (stmt);
+ parent_block.replace_statement (stmt, block);
+
+ stmt.body.checked = false;
+ check (block);
+ }
+
+ public override void visit_foreach_statement (ForeachStatement stmt) {
+ push_builder (new CodeBuilder (context, stmt, stmt.source_reference));
+ var collection = b.add_temp_declaration (stmt.collection.value_type, stmt.collection);
+
+ stmt.body.remove_local_variable (stmt.element_variable);
+ stmt.element_variable.checked = false;
+ var decl = new DeclarationStatement (stmt.element_variable,
stmt.element_variable.source_reference);
+
+ switch (stmt.foreach_iteration) {
+ case ForeachIteration.ARRAY:
+ case ForeachIteration.GVALUE_ARRAY:
+ // array or GValueArray
+ var array = collection;
+ if (stmt.foreach_iteration == ForeachIteration.GVALUE_ARRAY) {
+ array = collection+".values";
+ }
+ var i = b.add_temp_declaration (null, expression ("0"));
+ b.open_for (null, expression (@"$i < $array.length"), expression (@"$i++"));
+ stmt.element_variable.initializer = expression (@"$array[$i]");
+ break;
+ case ForeachIteration.GLIST:
+ // GList or GSList
+ b.open_for (null, expression (@"$collection != null"), expression (@"$collection =
$collection.next"));
+ stmt.element_variable.initializer = expression (@"$collection.data");
+ break;
+ case ForeachIteration.INDEX:
+ // get()+size
+ var size = b.add_temp_declaration (null, expression ("$collection.size"));
+ var i = b.add_temp_declaration (null, expression ("0"));
+ b.open_for (null, expression (@"$i < $size"), expression (@"$i++"));
+ stmt.element_variable.initializer = expression (@"$collection.get ($i)");
+ break;
+ case ForeachIteration.NEXT_VALUE:
+ // iterator+next_value()
+ var iterator = b.add_temp_declaration (null, expression (@"$collection.iterator ()"));
+ var temp = b.add_temp_declaration (stmt.type_reference);
+ b.open_while (expression (@"($temp = $iterator.next_value ()) != null"));
+ stmt.element_variable.initializer = expression (temp);
+ break;
+ case ForeachIteration.NEXT_GET:
+ // iterator+next()+get()
+ var iterator = b.add_temp_declaration (null, expression (@"$collection.iterator ()"));
+ b.open_while (expression (@"$iterator.next ()"));
+ stmt.element_variable.initializer = expression (@"$iterator.get ()");
+ break;
+ default:
+ assert_not_reached ();
+ }
+
+ stmt.body.insert_statement (0, decl);
+ b.add_statement (stmt.body);
+ b.close ();
+
+ var parent_block = context.analyzer.get_current_block (stmt);
+ context.analyzer.replaced_nodes.add (stmt);
+ parent_block.replace_statement (stmt, new EmptyStatement (stmt.source_reference));
+
+ stmt.body.checked = false;
+ b.check (this);
+ pop_builder ();
+ }
+
+ public override void visit_break_statement (BreakStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_continue_statement (ContinueStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_return_statement (ReturnStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_yield_statement (YieldStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_throw_statement (ThrowStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_try_statement (TryStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_catch_clause (CatchClause clause) {
+ clause.accept_children (this);
+ }
+
+ public override void visit_lock_statement (LockStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_unlock_statement (UnlockStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_delete_statement (DeleteStatement stmt) {
+ stmt.accept_children (this);
+ }
+
+ public override void visit_expression (Expression expr) {
+ expr.accept_children (this);
+ }
+
+ public override void visit_method_call (MethodCall expr) {
+ if (expr.tree_can_fail) {
+ if (expr.parent_node is LocalVariable || expr.parent_node is ExpressionStatement) {
+ // simple statements, no side effects after method call
+ } else if (!(context.analyzer.get_current_symbol (expr) is Block)) {
+ // can't handle errors in field initializers
+ Report.error (expr.source_reference, "Field initializers must not throw
errors");
+ } else {
+ // store parent_node as we need to replace the expression in the old parent
node later on
+ var old_parent_node = expr.parent_node;
+
+ var local = new LocalVariable (expr.value_type, expr.get_temp_name (), null,
expr.source_reference);
+ var decl = new DeclarationStatement (local, expr.source_reference);
+
+ expr.insert_statement (context.analyzer.get_current_block (expr), decl);
+
+
+ // don't set initializer earlier as this changes parent_node and
parent_statement
+ local.initializer = expr;
+ check (decl);
+
+ var temp_access = SemanticAnalyzer.create_temp_access (local,
expr.target_type);
+
+ // move temp variable to insert block to ensure
+ // variable is in the same block as the declarat
+ // otherwise there will be scoping issues in the
+ var block = context.analyzer.get_current_block (expr);
+ block.remove_local_variable (local);
+ context.analyzer.get_current_block (expr).add_local_variable (local);
+
+ context.analyzer.replaced_nodes.add (expr);
+ old_parent_node.replace_expression (expr, temp_access);
+ check (temp_access);
+ }
+ }
+ }
+
+ public override void visit_conditional_expression (ConditionalExpression expr) {
+ // convert to if statement
+
+ var local = new LocalVariable (expr.value_type, expr.get_temp_name (), null,
expr.source_reference);
+ var decl = new DeclarationStatement (local, expr.source_reference);
+ expr.insert_statement (context.analyzer.get_current_block (expr), decl);
+ check (decl);
+
+ var true_stmt = new ExpressionStatement (new Assignment (new MemberAccess.simple (local.name,
expr.true_expression.source_reference), expr.true_expression, AssignmentOperator.SIMPLE,
expr.true_expression.source_reference), expr.true_expression.source_reference);
+ var true_block = new Block (expr.true_expression.source_reference);
+ true_block.add_statement (true_stmt);
+
+ var false_stmt = new ExpressionStatement (new Assignment (new MemberAccess.simple
(local.name, expr.false_expression.source_reference), expr.false_expression, AssignmentOperator.SIMPLE,
expr.false_expression.source_reference), expr.false_expression.source_reference);
+ var false_block = new Block (expr.false_expression.source_reference);
+ false_block.add_statement (false_stmt);
+
+ var if_stmt = new IfStatement (expr.condition, true_block, false_block,
expr.source_reference);
+ expr.insert_statement (context.analyzer.get_current_block (expr), if_stmt);
+ check (if_stmt);
+
+ var ma = new MemberAccess.simple (local.name, expr.source_reference);
+ ma.formal_target_type = expr.formal_target_type;
+ ma.target_type = expr.target_type;
+
+ context.analyzer.replaced_nodes.add (expr);
+ expr.parent_node.replace_expression (expr, ma);
+ check (ma);
+ }
+}
diff --git a/codegen/valagvarianttransformer.vala b/codegen/valagvarianttransformer.vala
index e1259e6..26a521a 100644
--- a/codegen/valagvarianttransformer.vala
+++ b/codegen/valagvarianttransformer.vala
@@ -23,7 +23,7 @@
/**
* Code visitor for transforming the code tree related to GVariant.
*/
-public class Vala.GVariantTransformer : CodeTransformer {
+public class Vala.GVariantTransformer : CCodeTransformer {
struct BasicTypeInfo {
public unowned string signature;
public unowned string type_name;
diff --git a/vala/valacodetransformer.vala b/vala/valacodetransformer.vala
index e039907..02728fa 100644
--- a/vala/valacodetransformer.vala
+++ b/vala/valacodetransformer.vala
@@ -117,421 +117,4 @@ public class Vala.CodeTransformer : CodeVisitor {
}
node.accept (this);
}
-
- public override void visit_source_file (SourceFile source_file) {
- source_file.accept_children (this);
- }
-
- public override void visit_namespace (Namespace ns) {
- ns.accept_children (this);
- }
-
- public override void visit_class (Class cl) {
- cl.accept_children (this);
- }
-
- public override void visit_struct (Struct st) {
- st.accept_children (this);
- }
-
- public override void visit_interface (Interface iface) {
- iface.accept_children (this);
- }
-
- public override void visit_enum (Enum en) {
- en.accept_children (this);
- }
-
- public override void visit_enum_value (EnumValue ev) {
- ev.accept_children (this);
- }
-
- public override void visit_error_domain (ErrorDomain edomain) {
- edomain.accept_children (this);
- }
-
- public override void visit_error_code (ErrorCode ecode) {
- ecode.accept_children (this);
- }
-
- public override void visit_delegate (Delegate d) {
- d.accept_children (this);
- }
-
- public override void visit_constant (Constant c) {
- c.accept_children (this);
- }
-
- public override void visit_field (Field f) {
- f.accept_children (this);
- }
-
- public override void visit_method (Method m) {
- m.accept_children (this);
- }
-
- public override void visit_creation_method (CreationMethod m) {
- m.accept_children (this);
- }
-
- public override void visit_formal_parameter (Parameter p) {
- p.accept_children (this);
- }
-
- public override void visit_property (Property prop) {
- prop.accept_children (this);
- }
-
- public override void visit_property_accessor (PropertyAccessor acc) {
- acc.accept_children (this);
- }
-
- public override void visit_signal (Signal sig) {
- sig.accept_children (this);
- }
-
- public override void visit_constructor (Constructor c) {
- c.accept_children (this);
- }
-
- public override void visit_destructor (Destructor d) {
- d.accept_children (this);
- }
-
- public override void visit_block (Block b) {
- b.accept_children (this);
- }
-
- public override void visit_declaration_statement (DeclarationStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_local_variable (LocalVariable local) {
- local.accept_children (this);
- }
-
- public override void visit_initializer_list (InitializerList list) {
- list.accept_children (this);
- }
-
- public override void visit_expression_statement (ExpressionStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_if_statement (IfStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_switch_statement (SwitchStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_switch_section (SwitchSection section) {
- section.accept_children (this);
- }
-
- public override void visit_switch_label (SwitchLabel label) {
- label.accept_children (this);
- }
-
- bool always_true (Expression condition) {
- var literal = condition as BooleanLiteral;
- return (literal != null && literal.value);
- }
-
- bool always_false (Expression condition) {
- var literal = condition as BooleanLiteral;
- return (literal != null && !literal.value);
- }
-
- public override void visit_loop (Loop loop) {
- loop.accept_children (this);
- }
-
- public override void visit_while_statement (WhileStatement stmt) {
- // convert to simple loop
-
- if (always_true (stmt.condition)) {
- // do not generate if block if condition is always true
- } else if (always_false (stmt.condition)) {
- // do not generate if block if condition is always false
- stmt.body.insert_statement (0, new BreakStatement (stmt.condition.source_reference));
- } else {
- var if_condition = new UnaryExpression (UnaryOperator.LOGICAL_NEGATION,
stmt.condition, stmt.condition.source_reference);
- var true_block = new Block (stmt.condition.source_reference);
- true_block.add_statement (new BreakStatement (stmt.condition.source_reference));
- var if_stmt = new IfStatement (if_condition, true_block, null,
stmt.condition.source_reference);
- stmt.body.insert_statement (0, if_stmt);
- }
-
- var loop = new Loop (stmt.body, stmt.source_reference);
-
- var parent_block = (Block) stmt.parent_node;
- context.analyzer.replaced_nodes.add (stmt);
- parent_block.replace_statement (stmt, loop);
-
- stmt.body.checked = false;
- check (loop);
- }
-
- public override void visit_do_statement (DoStatement stmt) {
- // convert to simple loop
-
- // do not generate variable and if block if condition is always true
- if (always_true (stmt.condition)) {
- var loop = new Loop (stmt.body, stmt.source_reference);
-
- var parent_block = (Block) stmt.parent_node;
- context.analyzer.replaced_nodes.add (stmt);
- parent_block.replace_statement (stmt, loop);
-
- check (loop);
- return;
- }
-
- var block = new Block (stmt.source_reference);
-
- var first_local = new LocalVariable (context.analyzer.bool_type.copy (), stmt.get_temp_name
(), new BooleanLiteral (true, stmt.source_reference), stmt.source_reference);
- block.add_statement (new DeclarationStatement (first_local, stmt.source_reference));
-
- var if_condition = new UnaryExpression (UnaryOperator.LOGICAL_NEGATION, stmt.condition,
stmt.condition.source_reference);
- var true_block = new Block (stmt.condition.source_reference);
- true_block.add_statement (new BreakStatement (stmt.condition.source_reference));
- var if_stmt = new IfStatement (if_condition, true_block, null,
stmt.condition.source_reference);
-
- var condition_block = new Block (stmt.condition.source_reference);
- condition_block.add_statement (if_stmt);
-
- var first_if = new IfStatement (new UnaryExpression (UnaryOperator.LOGICAL_NEGATION, new
MemberAccess.simple (first_local.name, stmt.source_reference), stmt.source_reference), condition_block, null,
stmt.source_reference);
- stmt.body.insert_statement (0, first_if);
- var first_assign = new ExpressionStatement (new Assignment (new MemberAccess.simple
(first_local.name, stmt.source_reference), new BooleanLiteral (false, stmt.source_reference),
AssignmentOperator.SIMPLE, stmt.source_reference), stmt.source_reference);
- stmt.body.insert_statement (1, first_assign);
-
- block.add_statement (new Loop (stmt.body, stmt.source_reference));
-
- var parent_block = (Block) stmt.parent_node;
- context.analyzer.replaced_nodes.add (stmt);
- parent_block.replace_statement (stmt, block);
-
- stmt.body.checked = false;
- check (block);
- }
-
- public override void visit_for_statement (ForStatement stmt) {
- // convert to simple loop
-
- var block = new Block (stmt.source_reference);
-
- // initializer
- foreach (var init_expr in stmt.get_initializer ()) {
- block.add_statement (new ExpressionStatement (init_expr, init_expr.source_reference));
- }
-
- // do not generate if block if condition is always true
- if (stmt.condition == null || always_true (stmt.condition)) {
- } else if (always_false (stmt.condition)) {
- // do not generate if block if condition is always false
- stmt.body.insert_statement (0, new BreakStatement (stmt.condition.source_reference));
- } else {
- // condition
- var if_condition = new UnaryExpression (UnaryOperator.LOGICAL_NEGATION,
stmt.condition, stmt.condition.source_reference);
- var true_block = new Block (stmt.condition.source_reference);
- true_block.add_statement (new BreakStatement (stmt.condition.source_reference));
- var if_stmt = new IfStatement (if_condition, true_block, null,
stmt.condition.source_reference);
- stmt.body.insert_statement (0, if_stmt);
- }
-
- // iterator
- var first_local = new LocalVariable (context.analyzer.bool_type.copy (), stmt.get_temp_name
(), new BooleanLiteral (true, stmt.source_reference), stmt.source_reference);
- block.add_statement (new DeclarationStatement (first_local, stmt.source_reference));
-
- var iterator_block = new Block (stmt.source_reference);
- foreach (var it_expr in stmt.get_iterator ()) {
- iterator_block.add_statement (new ExpressionStatement (it_expr,
it_expr.source_reference));
- }
-
- var first_if = new IfStatement (new UnaryExpression (UnaryOperator.LOGICAL_NEGATION, new
MemberAccess.simple (first_local.name, stmt.source_reference), stmt.source_reference), iterator_block, null,
stmt.source_reference);
- stmt.body.insert_statement (0, first_if);
- stmt.body.insert_statement (1, new ExpressionStatement (new Assignment (new
MemberAccess.simple (first_local.name, stmt.source_reference), new BooleanLiteral (false,
stmt.source_reference), AssignmentOperator.SIMPLE, stmt.source_reference), stmt.source_reference));
-
- block.add_statement (new Loop (stmt.body, stmt.source_reference));
-
- var parent_block = (Block) stmt.parent_node;
- context.analyzer.replaced_nodes.add (stmt);
- parent_block.replace_statement (stmt, block);
-
- stmt.body.checked = false;
- check (block);
- }
-
- public override void visit_foreach_statement (ForeachStatement stmt) {
- push_builder (new CodeBuilder (context, stmt, stmt.source_reference));
- var collection = b.add_temp_declaration (stmt.collection.value_type, stmt.collection);
-
- stmt.body.remove_local_variable (stmt.element_variable);
- stmt.element_variable.checked = false;
- var decl = new DeclarationStatement (stmt.element_variable,
stmt.element_variable.source_reference);
-
- switch (stmt.foreach_iteration) {
- case ForeachIteration.ARRAY:
- case ForeachIteration.GVALUE_ARRAY:
- // array or GValueArray
- var array = collection;
- if (stmt.foreach_iteration == ForeachIteration.GVALUE_ARRAY) {
- array = collection+".values";
- }
- var i = b.add_temp_declaration (null, expression ("0"));
- b.open_for (null, expression (@"$i < $array.length"), expression (@"$i++"));
- stmt.element_variable.initializer = expression (@"$array[$i]");
- break;
- case ForeachIteration.GLIST:
- // GList or GSList
- b.open_for (null, expression (@"$collection != null"), expression (@"$collection =
$collection.next"));
- stmt.element_variable.initializer = expression (@"$collection.data");
- break;
- case ForeachIteration.INDEX:
- // get()+size
- var size = b.add_temp_declaration (null, expression ("$collection.size"));
- var i = b.add_temp_declaration (null, expression ("0"));
- b.open_for (null, expression (@"$i < $size"), expression (@"$i++"));
- stmt.element_variable.initializer = expression (@"$collection.get ($i)");
- break;
- case ForeachIteration.NEXT_VALUE:
- // iterator+next_value()
- var iterator = b.add_temp_declaration (null, expression (@"$collection.iterator ()"));
- var temp = b.add_temp_declaration (stmt.type_reference);
- b.open_while (expression (@"($temp = $iterator.next_value ()) != null"));
- stmt.element_variable.initializer = expression (temp);
- break;
- case ForeachIteration.NEXT_GET:
- // iterator+next()+get()
- var iterator = b.add_temp_declaration (null, expression (@"$collection.iterator ()"));
- b.open_while (expression (@"$iterator.next ()"));
- stmt.element_variable.initializer = expression (@"$iterator.get ()");
- break;
- default:
- assert_not_reached ();
- }
-
- stmt.body.insert_statement (0, decl);
- b.add_statement (stmt.body);
- b.close ();
-
- var parent_block = context.analyzer.get_current_block (stmt);
- context.analyzer.replaced_nodes.add (stmt);
- parent_block.replace_statement (stmt, new EmptyStatement (stmt.source_reference));
-
- stmt.body.checked = false;
- b.check (this);
- pop_builder ();
- }
-
- public override void visit_break_statement (BreakStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_continue_statement (ContinueStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_return_statement (ReturnStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_yield_statement (YieldStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_throw_statement (ThrowStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_try_statement (TryStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_catch_clause (CatchClause clause) {
- clause.accept_children (this);
- }
-
- public override void visit_lock_statement (LockStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_unlock_statement (UnlockStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_delete_statement (DeleteStatement stmt) {
- stmt.accept_children (this);
- }
-
- public override void visit_expression (Expression expr) {
- expr.accept_children (this);
- }
-
- public override void visit_method_call (MethodCall expr) {
- if (expr.tree_can_fail) {
- if (expr.parent_node is LocalVariable || expr.parent_node is ExpressionStatement) {
- // simple statements, no side effects after method call
- } else if (!(context.analyzer.get_current_symbol (expr) is Block)) {
- // can't handle errors in field initializers
- Report.error (expr.source_reference, "Field initializers must not throw
errors");
- } else {
- // store parent_node as we need to replace the expression in the old parent
node later on
- var old_parent_node = expr.parent_node;
-
- var local = new LocalVariable (expr.value_type, expr.get_temp_name (), null,
expr.source_reference);
- var decl = new DeclarationStatement (local, expr.source_reference);
-
- expr.insert_statement (context.analyzer.get_current_block (expr), decl);
-
- var temp_access = SemanticAnalyzer.create_temp_access (local,
expr.target_type);
-
- // don't set initializer earlier as this changes parent_node and
parent_statement
- local.initializer = expr;
- check (decl);
-
- // move temp variable to insert block to ensure
- // variable is in the same block as the declarat
- // otherwise there will be scoping issues in the
- var block = context.analyzer.get_current_block (expr);
- block.remove_local_variable (local);
- context.analyzer.get_current_block (expr).add_local_variable (local);
-
- context.analyzer.replaced_nodes.add (expr);
- old_parent_node.replace_expression (expr, temp_access);
- check (temp_access);
- }
- }
- }
-
- public override void visit_conditional_expression (ConditionalExpression expr) {
- // convert to if statement
-
- var local = new LocalVariable (expr.value_type, expr.get_temp_name (), null,
expr.source_reference);
- var decl = new DeclarationStatement (local, expr.source_reference);
- expr.insert_statement (context.analyzer.get_current_block (expr), decl);
- check (decl);
-
- var true_stmt = new ExpressionStatement (new Assignment (new MemberAccess.simple (local.name,
expr.true_expression.source_reference), expr.true_expression, AssignmentOperator.SIMPLE,
expr.true_expression.source_reference), expr.true_expression.source_reference);
- var true_block = new Block (expr.true_expression.source_reference);
- true_block.add_statement (true_stmt);
-
- var false_stmt = new ExpressionStatement (new Assignment (new MemberAccess.simple
(local.name, expr.false_expression.source_reference), expr.false_expression, AssignmentOperator.SIMPLE,
expr.false_expression.source_reference), expr.false_expression.source_reference);
- var false_block = new Block (expr.false_expression.source_reference);
- false_block.add_statement (false_stmt);
-
- var if_stmt = new IfStatement (expr.condition, true_block, false_block,
expr.source_reference);
- expr.insert_statement (context.analyzer.get_current_block (expr), if_stmt);
- check (if_stmt);
-
- var ma = new MemberAccess.simple (local.name, expr.source_reference);
- ma.formal_target_type = expr.formal_target_type;
- ma.target_type = expr.target_type;
-
- context.analyzer.replaced_nodes.add (expr);
- expr.parent_node.replace_expression (expr, ma);
- check (ma);
- }
}
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