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self-compiler: handles try/catch/finally blocks

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Jeremy Ashkenas
2010-02-10 18:33:03 -05:00
parent 76dac9c09c
commit 4e7408dc25
5 changed files with 220 additions and 183 deletions
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22
lib/coffee_script/nodes.js
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@@ -1,5 +1,5 @@
(function(){
var AccessorNode, ArrayNode, AssignNode, CallNode, ClosureNode, CodeNode, CommentNode, Expressions, ExtendsNode, IDENTIFIER, IndexNode, LiteralNode, Node, ObjectNode, OpNode, PushNode, RangeNode, ReturnNode, SliceNode, SplatNode, TAB, TRAILING_WHITESPACE, ThisNode, ValueNode, WhileNode, any, compact, del, dup, flatten, inherit, merge, statement;
var AccessorNode, ArrayNode, AssignNode, CallNode, ClosureNode, CodeNode, CommentNode, Expressions, ExtendsNode, IDENTIFIER, IndexNode, LiteralNode, Node, ObjectNode, OpNode, PushNode, RangeNode, ReturnNode, SliceNode, SplatNode, TAB, TRAILING_WHITESPACE, ThisNode, TryNode, ValueNode, WhileNode, any, compact, del, dup, flatten, inherit, merge, statement;
var __hasProp = Object.prototype.hasOwnProperty;
process.mixin(require('./scope'));
// The abstract base class for all CoffeeScript nodes.
@@ -1114,4 +1114,24 @@
return parts.join('');
}
}));
// A try/catch/finally block.
TryNode = (exports.TryNode = inherit(Node, {
constructor: function constructor(attempt, error, recovery, ensure) {
this.children = [(this.attempt = attempt), (this.recovery = recovery), (this.ensure = ensure)];
this.error = error;
return this;
},
compile_node: function compile_node(o) {
var catch_part, error_part, finally_part;
o.indent = this.idt(1);
o.top = true;
error_part = this.error ? ' (' + this.error.compile(o) + ') ' : ' ';
catch_part = (this.recovery || '') && ' catch' + error_part + '{\n' + this.recovery.compile(o) + '\n' + this.idt() + '}';
finally_part = (this.ensure || '') && ' finally {\n' + this.ensure.compile(merge(o, {
returns: null
})) + '\n' + this.idt() + '}';
return this.idt() + 'try {\n' + this.attempt.compile(o) + '\n' + this.idt() + '}' + catch_part + finally_part;
}
}));
statement(TryNode);
})();