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cleaned up usage of AST_BlockStatement

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The following nodes were instances of AST_BlockStatement: AST_Scope,
AST_SwitchBlock, AST_SwitchBranch.  Also, AST_Try, AST_Catch, AST_Finally
were having a body instanceof AST_BlockStatement.

Overloading the meaning of AST_BlockStatement this way turned out to be a
mess; we now have an AST_Block class that is the base class for things
having a block of statements (might or might not be bracketed).  The
`this.body` of AST_Scope, AST_Try, AST_Catch, AST_Finally is now an array of
statements (as they inherit from AST_Block).

Avoiding calling superclass's _walk function in walkers (turns out we walked
a node multiple times).
This commit is contained in:
Mihai Bazon
2012-09-05 11:31:02 +03:00
parent 1b5183dd5e
commit 8633b0073f
6 changed files with 61 additions and 60 deletions
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10
lib/compress.js
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@@ -480,6 +480,12 @@ function Compressor(options, false_by_default) {
return self;
});
SQUEEZE(AST_Block, function(self, compressor){
self = self.clone();
self.body = tighten_body(self.body, compressor);
return self;
});
SQUEEZE(AST_Scope, function(self, compressor){
self = self.clone();
self.hoist_declarations(compressor);
@@ -651,7 +657,7 @@ function Compressor(options, false_by_default) {
SQUEEZE(AST_Try, function(self, compressor){
self = self.clone();
self.btry = self.btry.squeeze(compressor);
self.body = tighten_body(self.body, compressor);
if (self.bcatch) self.bcatch = self.bcatch.squeeze(compressor);
if (self.bfinally) self.bfinally = self.bfinally.squeeze(compressor);
return self;
@@ -682,7 +688,7 @@ function Compressor(options, false_by_default) {
self.hoist_declarations(compressor);
if (self.name) self.name = self.name.squeeze(compressor);
self.argnames = do_list(self.argnames, compressor);
self.body = self.body.squeeze(compressor);
self.body = tighten_body(self.body, compressor);
return self;
});