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CoffeeScript-in-CoffeeScript can compile dotted accessors

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This commit is contained in:
Jeremy Ashkenas 2010-02-08 23:42:03 -05:00
parent 32098e5a13
commit cb57a1ca1f
4 changed files with 45 additions and 11 deletions
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8
lib/coffee_script/lexer.js
View file

@ -107,12 +107,12 @@
if (tag === 'IDENTIFIER' && this.value() === '::') {
this.tag(-1, 'PROTOTYPE_ACCESS');
}
if (tag === 'IDENTIFIER' && this.value() === '.' && !(this.value(-2) === '.')) {
if (this.tag(-2) === '?') {
this.tag(-1, 'SOAK_ACCESS');
if (tag === 'IDENTIFIER' && this.value() === '.' && !(this.value(2) === '.')) {
if (this.tag(2) === '?') {
this.tag(1, 'SOAK_ACCESS');
this.tokens.splice(-2, 1);
} else {
this.tag(-1, 'PROPERTY_ACCESS');
this.tag(1, 'PROPERTY_ACCESS');
}
}
this.token(tag, id);

22
lib/coffee_script/nodes.js
View file

@ -1,5 +1,5 @@
(function(){
var CallNode, CommentNode, Expressions, ExtendsNode, LiteralNode, Node, ReturnNode, TAB, TRAILING_WHITESPACE, ValueNode, any, compact, del, dup, flatten, inherit, merge, statement;
var AccessorNode, CallNode, CommentNode, Expressions, ExtendsNode, LiteralNode, Node, ReturnNode, TAB, TRAILING_WHITESPACE, ValueNode, 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.
@ -553,7 +553,8 @@
},
push: function push(prop) {
this.properties.push(prop);
return this.children.push(prop);
this.children.push(prop);
return this;
},
has_properties: function has_properties() {
return this.properties.length || this.base instanceof ThisNode;
@ -640,7 +641,8 @@
},
push: function push(arg) {
this.args.push(arg);
return this.children.push(arg);
this.children.push(arg);
return this;
},
// Compile a vanilla function call.
compile_node: function compile_node(o) {
@ -718,4 +720,18 @@
}
}));
statement(ExtendsNode);
// A dotted accessor into a part of a value, or the :: shorthand for
// an accessor into the object's prototype.
AccessorNode = (exports.AccessorNode = inherit(Node, {
constructor: function constructor(name, tag) {
this.name = name;
this.children = [this.name];
this.prototype = tag === 'prototype';
this.soak = tag === 'soak';
return this;
},
compile_node: function compile_node(o) {
return '.' + (this.prototype ? 'prototype.' : '') + this.name.compile(o);
}
}));
})();

8
src/lexer.coffee
View file

@ -96,12 +96,12 @@ lex::identifier_token: ->
tag: if KEYWORDS.indexOf(id) >= 0 then id.toUpperCase() else 'IDENTIFIER'
tag: 'LEADING_WHEN' if tag is 'WHEN' and (this.tag() is 'OUTDENT' or this.tag() is 'INDENT')
this.tag(-1, 'PROTOTYPE_ACCESS') if tag is 'IDENTIFIER' and this.value() is '::'
if tag is 'IDENTIFIER' and this.value() is '.' and !(this.value(-2) is '.')
if this.tag(-2) is '?'
this.tag(-1, 'SOAK_ACCESS')
if tag is 'IDENTIFIER' and this.value() is '.' and !(this.value(2) is '.')
if this.tag(2) is '?'
this.tag(1, 'SOAK_ACCESS')
this.tokens.splice(-2, 1)
else
this.tag(-1, 'PROPERTY_ACCESS')
this.tag(1, 'PROPERTY_ACCESS')
this.token(tag, id)
this.i += id.length
true

18
src/nodes.coffee
View file

@ -290,6 +290,7 @@ ValueNode: exports.ValueNode: inherit Node, {
push: (prop) ->
@properties.push(prop)
@children.push(prop)
this
has_properties: ->
@properties.length or @base instanceof ThisNode
@ -377,6 +378,7 @@ CallNode: exports.CallNode: inherit Node, {
push: (arg) ->
@args.push(arg)
@children.push(arg)
this
# Compile a vanilla function call.
compile_node: (o) ->
@ -441,6 +443,22 @@ ExtendsNode: exports.ExtendsNode: inherit Node, {
statement ExtendsNode
# A dotted accessor into a part of a value, or the :: shorthand for
# an accessor into the object's prototype.
AccessorNode: exports.AccessorNode: inherit Node, {
constructor: (name, tag) ->
@name: name
@children: [@name]
@prototype: tag is 'prototype'
@soak: tag is 'soak'
this
compile_node: (o) ->
'.' + (if @prototype then 'prototype.' else '') + @name.compile(o)
}