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self-compiler handles throws, the existential operator, and parentheticals.

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Jeremy Ashkenas
2010-02-10 19:13:11 -05:00
parent 4e7408dc25
commit 0c2a13b468
3 changed files with 96 additions and 4 deletions
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51
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, TryNode, ValueNode, WhileNode, any, compact, del, dup, flatten, inherit, merge, statement;
var AccessorNode, ArrayNode, AssignNode, CallNode, ClosureNode, CodeNode, CommentNode, ExistenceNode, Expressions, ExtendsNode, IDENTIFIER, IndexNode, LiteralNode, Node, ObjectNode, OpNode, ParentheticalNode, PushNode, RangeNode, ReturnNode, SliceNode, SplatNode, TAB, TRAILING_WHITESPACE, ThisNode, ThrowNode, 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.
@@ -1134,4 +1134,53 @@
}
}));
statement(TryNode);
// Throw an exception.
ThrowNode = (exports.ThrowNode = inherit(Node, {
constructor: function constructor(expression) {
this.children = [(this.expression = expression)];
return this;
},
compile_node: function compile_node(o) {
return this.idt() + 'throw ' + this.expression.compile(o) + ';';
}
}));
statement(ThrowNode, true);
// Check an expression for existence (meaning not null or undefined).
ExistenceNode = (exports.ExistenceNode = inherit(Node, {
constructor: function constructor(expression) {
this.children = [(this.expression = expression)];
return this;
},
compile_node: function compile_node(o) {
return ExistenceNode.compile_test(o, this.expression);
}
}));
ExistenceNode.compile_test = function compile_test(o, variable) {
var __a, __b, first, second;
__a = [variable, variable];
first = __a[0];
second = __a[1];
if (variable instanceof CallNode) {
__b = variable.compile_reference(o);
first = __b[0];
second = __b[1];
}
return '(typeof ' + first.compile(o) + ' !== "undefined" && ' + second.compile(o) + ' !== null)';
};
// An extra set of parentheses, specified explicitly in the source.
ParentheticalNode = (exports.ParentheticalNode = inherit(Node, {
constructor: function constructor(expressions) {
this.children = [(this.expressions = expressions)];
return this;
},
compile_node: function compile_node(o) {
var code, l;
code = this.expressions.compile(o);
l = code.length;
if (code.substr(l - 1, 1) === ';') {
code = code.substr(o, l - 1);
}
return '(' + code + ')';
}
}));
})();