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Moved name labels to the statement production.

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This commit is contained in:
arookas 2015-12-28 20:19:12 -05:00
parent 649e01b7c5
commit 2ce9882cad
3 changed files with 30 additions and 21 deletions
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35
ssc/ast/nodes.flow.cs
View file

@ -28,23 +28,29 @@ namespace arookas {
}
abstract class sunLoop : sunNode {
public bool IsNamed { get { return NameLabel != null; } }
public sunNameLabel NameLabel { get { return this[0] as sunNameLabel; } }
protected sunLoop(sunSourceLocation location)
: base(location) { }
public void PushLoop(sunContext context) {
var name = context.PopNameLabel();
if (name == null) {
context.Loops.Push();
}
else {
context.Loops.Push(name.Label.Value);
}
}
}
class sunWhile : sunLoop
{
public sunExpression Condition { get { return this[Count - 2] as sunExpression; } }
public sunNode Body { get { return this[Count - 1]; } }
class sunWhile : sunLoop {
public sunExpression Condition { get { return this[0] as sunExpression; } }
public sunNode Body { get { return this[1]; } }
public sunWhile(sunSourceLocation location)
: base(location) { }
public override void Compile(sunContext context) {
context.Loops.Push(IsNamed ? NameLabel.Label.Value : null);
PushLoop(context);
var bodyPrologue = context.Text.OpenPoint();
var continuePoint = context.Text.OpenPoint();
Condition.Compile(context);
@ -57,16 +63,15 @@ namespace arookas {
}
}
class sunDo : sunLoop
{
public sunNode Body { get { return this[Count - 2]; } }
public sunExpression Condition { get { return this[Count - 1] as sunExpression; } }
class sunDo : sunLoop {
public sunNode Body { get { return this[0]; } }
public sunExpression Condition { get { return this[1] as sunExpression; } }
public sunDo(sunSourceLocation location)
: base(location) { }
public override void Compile(sunContext context) {
context.Loops.Push(IsNamed ? NameLabel.Label.Value : null);
PushLoop(context);
var bodyPrologue = context.Text.OpenPoint();
Body.Compile(context);
var continuePoint = context.Text.OpenPoint();
@ -89,8 +94,8 @@ namespace arookas {
: base(location) { }
public override void Compile(sunContext context) {
context.Scopes.Push(context.Scopes.Top.Type);
context.Loops.Push(IsNamed ? NameLabel.Label.Value : null);
context.Scopes.Push();
PushLoop(context);
TryCompile(Declaration, context);
var bodyPrologue = context.Text.OpenPoint();
TryCompile(Condition, context);

4
ssc/ast/nodes.statements.cs
View file

@ -35,5 +35,9 @@
public sunNameLabel(sunSourceLocation location)
: base(location) { }
public override void Compile(sunContext context) {
context.PushNameLabel(this);
}
}
}

12
ssc/sunscript.grammar
View file

@ -123,9 +123,9 @@ root_statement =
statement =
compound_statement SEMICOLON |
if_statement |
while_statement |
do_statement SEMICOLON |
for_statement |
[name_label] while_statement |
[name_label] do_statement SEMICOLON |
[name_label] for_statement |
return_statement SEMICOLON |
break_statement SEMICOLON |
continue_statement SEMICOLON |
@ -219,9 +219,9 @@ builtin_declaration = BUILTIN IDENTIFIER parameter_list;
// flow control
if_statement = IF expression statement [ELSE statement];
while_statement = [name_label] WHILE expression statement;
do_statement = [name_label] DO statement WHILE expression;
for_statement = [name_label] FOR L_PAREN [for_declaration] SEMICOLON [for_condition] SEMICOLON [for_iteration] R_PAREN statement;
while_statement = WHILE expression statement;
do_statement = DO statement WHILE expression;
for_statement = FOR L_PAREN [for_declaration] SEMICOLON [for_condition] SEMICOLON [for_iteration] R_PAREN statement;
for_declaration = compound_statement;
for_condition = expression;
for_iteration = compound_statement;