60 lines
3.1 KiB
JavaScript
60 lines
3.1 KiB
JavaScript
/**
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* @fileoverview
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* Registers a language handler for Ruby.
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* When in doubt, this module attempts to mimic vim.
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* Ruby grammar: http://www.cse.buffalo.edu/~regan/cse305/RubyBNF.pdf
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*
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* @author matthew.y.king@gmail.com
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*/
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PR.registerLangHandler(PR.createSimpleLexer([
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// # comment
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[PR['PR_COMMENT'], /^#[^\r\n]*/, null, '#']
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// 'foo', "foo", `foo`
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// String interpolation is unsupported.
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, [PR['PR_STRING'], /^([\'\"\`])(?:(?!\1)|[^\\]|\\[\s\S])*?(?:\1|$)/, null, '\'\"\`']
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], [
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// =begin
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// comment
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// =end
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// `=begin` must be located at the beginning of the line.
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// At this time, the case where `=begin` begins a source file is not accounted for.
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[PR['PR_COMMENT'], /^[\r\n]=begin\b[\s\S]*?(?:=end|$)/]
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// %q{}, %q[], %q(), %q<> (balanced quotes)
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// Nested balanced quotes are unsupported.
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, [PR['PR_STRING'], /^%[qQ](?:\{(?:[^\}\\]|\\[\s\S])*?(?:\}|$)|\[(?:[^\]\\]|\\[\s\S])*?(?:\]|$)|\((?:[^\)\\]|\\[\s\S])*?(?:\)|$)|\<(?:[^\>\\]|\\[\s\S])*?(?:\>|$))/]
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// %q||, etc (generic non-balanced quotes)
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, [PR['PR_STRING'], /^%[qQ](.)(?:(?!\1)|[^\\]|\\[\s\S])*?(?:\1|$)/]
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// <<HEREDOC
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, [PR['PR_STRING'], /^<<(\w+)[\s\S]*?[\r\n]\1/]
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// <<'HEREDOC'
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// For quoted heredocs, ruby requires `'` or `"` quotes, and ruby does not allow escaped quotes or line breaks.
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, [PR['PR_STRING'], /^<<(?=[\'\"]([ \w]+)[\'\"])(?:\'\1\'|\"\1\")[\s\S]*?[\r\n]\1/]
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// <<-HEREDOC
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, [PR['PR_STRING'], /^<<-(\w+)[\s\S]*?\1/]
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// <<-'HEREDOC'
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, [PR['PR_STRING'], /^<<-(?=[\'\"]([ \w]+)[\'\"])(?:\'\1\'|\"\1\")[\s\S]*?\1/]
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// /regex/options
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, ['lang-regex', /^(?:^^\.?|[+-]|[!=]=?=?|\#|%=?|&&?=?|\(|\*=?|[+\-]=|->|\/=?|::?|<<?=?|>>?>?=?|,|;|\?|@|\[|~|{|\^\^?=?|\|\|?=?|break|case|continue|delete|do|else|finally|instanceof|return|throw|try|typeof|when)\s*(\/(?:[^\/\\]|\\[\s\S])+?(?:\/|$)[a-z]*)/]
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// %r{}, %r[], %r{}, %r<> (balanced delimiters)
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, [PR['PR_STRING'], /^%r(?:\{(?:[^\}\\]|\\[\s\S])*?(?:\}|$)|\[(?:[^\]\\]|\\[\s\S])*?(?:\]|$)|\((?:[^\)\\]|\\[\s\S])*?(?:\)|$)|\<(?:[^\>\\]|\\[\s\S])*?(?:\>|$))[a-z]*/]
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// %r||, etc (generic non-balanced delimiters)
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, [PR['PR_STRING'], /^%r(.)(?:(?!\1)|[^\\]|\\[\s\S])*?(?:\1|$)[a-z]*/]
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// :symbol, :'symbol', symbol:
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, [PR['PR_LITERAL'], /^(?::[\w\?!]+|:([\'\"\`])(?:(?!\1)|[^\\]|\\[\s\S])*?(?:\1|$)|[\w\?!]+:(?!:))/]
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// Exclude `::` (as in Foo::method)
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, [PR['PR_PLAIN'], /^::/]
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// ?a (the character 'a')
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, [PR['PR_LITERAL'], /^(?:\?.)\b/]
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// Exclude `method?`
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, [PR['PR_PLAIN'], /^\w\?/]
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// 0b01, 0x1aA, 1.2e12
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// Accept `_` within numbers.
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, [PR['PR_LITERAL'], /^\b(?:0b[_01]+|0x[_a-f0-9]+|\d+[_\d]*\.?(?:\d[_\d]*)?(?:e[+\-]?\d[_\d]*)?)\b/i]
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// Exclude `method1`
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, [PR['PR_PLAIN'], /^\w\d+/]
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// scope variables (@foo, @@foo, $foo), capitalized types, CONSTANTs, built-in dollar variables
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, [PR['PR_TYPE'], /^(?:(?:@|@@|\$)\w+|[A-Z]+[a-z]\w+|[A-Z][_A-Z0-9]*)\b|\$./]
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// keywords
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, [PR['PR_KEYWORD'], /^\b(?:BEGIN|END|alias|and|begin|break|case|class|def|do|else|elsif|end|ensure|extend|false|for|if|lambda|in|include|module|next|nil|not|or|private|proc|protected|redo|require|rescue|retry|return|self|super|true|undef|unless|until|when|while|yield)\b/]
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]), ['rb']); |