74 lines
1.7 KiB
CoffeeScript
74 lines
1.7 KiB
CoffeeScript
# Ensure that carriage returns don't break compilation on Windows.
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CoffeeScript: require('./../lib/coffee-script')
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Lexer: require('./../lib/lexer')
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js: CoffeeScript.compile("one\r\ntwo", {noWrap: on})
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ok js is "one;\ntwo;"
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# Try out language extensions to CoffeeScript.
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# Create the Node were going to add -- a literal syntax for splitting
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# strings into letters.
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class SplitNode extends BaseNode
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type: 'Split'
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constructor: (variable) ->
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@variable: variable
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compileNode: (o) ->
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"'${@variable}'.split('')"
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# Extend CoffeeScript with our lexing function that matches --wordgoeshere--
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# and creates a SplitNode.
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CoffeeScript.extend ->
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return false unless variable: @match(/^--(\w+)--/, 1)
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@i: + variable.length + 4
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@token 'EXTENSION', new SplitNode(variable)
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true
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# Compile with the extension.
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js: CoffeeScript.compile 'return --tobesplit--', {noWrap: on}
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ok js is "return 'tobesplit'.split('');"
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# Let's try a different extension, for Ruby-style array literals.
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class WordArrayNode extends BaseNode
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type: 'WordArray'
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constructor: (words) ->
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@words: words
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compileNode: (o) ->
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strings = ("\"$word\"" for word in @words).join ', '
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"[$strings]"
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CoffeeScript.extend ->
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return false unless words: @chunk.match(/^%w\{(.*?)\}/)
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@i: + words[0].length
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@token 'EXTENSION', new WordArrayNode(words[1].split(/\s+/))
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true
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js: CoffeeScript.compile 'puts %w{one two three}', {noWrap: on}
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ok js is 'puts(["one", "two", "three"]);'
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# Finally, let's try an extension that converts `a << b` into `a.push(b)`.
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CoffeeScript.extend ->
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return false unless @chunk.match(/^<</)
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@i: + 2
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@token 'PROPERTY_ACCESS', '.'
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@token 'IDENTIFIER', 'push'
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js: CoffeeScript.compile 'a << b', {noWrap: on}
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ok js is 'a.push(b);'
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Lexer.extensions: []
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