59 lines
1.9 KiB
Ruby
59 lines
1.9 KiB
Ruby
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require 'syntax'
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module Syntax
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class Javascript < Tokenizer
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JAVASCRIPT_KEYWORDS =
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%w{abstract break case catch class const continue
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debugger default delete do else enum export extends
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final finally for function goto if implements
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import in instanceof interface native new
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package private protected public return
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static super switch synchronized this throw
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throws transient try typeof
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var void volatile while with} unless const_defined?(:JAVASCRIPT_KEYWORDS)
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JAVASCRIPT_PREDEFINED_TYPES =
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%w{boolean byte char double float int long short} unless const_defined?(:JAVASCRIPT_PREDEFINED_TYPES)
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JAVASCRIPT_PREDEFINED_CONSTANTS =
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%w{null true false} unless const_defined?(:JAVASCRIPT_PREDEFINED_CONSTANTS)
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def step
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case
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when scan(/\s+/)
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start_group :normal, matched
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when scan(/\\u[0-9a-f]{4}/i)
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start_group :unicode, matched
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when scan(/0[xX][0-9A-Fa-f]+/)
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start_group :hex, matched
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when scan(/(?:0[0-7]+)(?![89.eEfF])/)
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start_group :oct, matched
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when scan(/(?:\d+)(?![.eEfF])/)
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start_group :integer, matched
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when scan(/\d[fF]?|\d*\.\d+(?:[eE][+-]?\d+)?[fF]?|\d+[eE][+-]?\d+[fF]?/)
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start_group :float, matched
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when (scan(/"(?:[^"\\]|\\.)*"/) or scan(/'(?:[^'\\]|\\.)*'/) )
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start_group :string, matched
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when scan(/[a-z_$][a-z_\d]*/i)
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if JAVASCRIPT_KEYWORDS.include?( matched )
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start_group :keyword, matched
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elsif JAVASCRIPT_PREDEFINED_TYPES.include?( matched )
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start_group :predefined_types, matched
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else
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start_group :ident, matched
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end
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when scan(%r! // [^\n\\]* (?: \\. [^\n\\]* )* | /\* (?: .*? \*/ | .* ) !mx)
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start_group :comment, matched
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else
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start_group :other, scan(/./x)
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end
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end
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end
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SYNTAX["javascript"] = Javascript
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end
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