59 lines
2.3 KiB
JavaScript
59 lines
2.3 KiB
JavaScript
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// Copyright (C) 2010 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview
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* Registers a language handler for the Go language..
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* <p>
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* Based on the lexical grammar at
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* http://golang.org/doc/go_spec.html#Lexical_elements
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* <p>
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* Go uses a minimal style for highlighting so the below does not distinguish
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* strings, keywords, literals, etc. by design.
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* From a discussion with the Go designers:
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* <pre>
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* On Thursday, July 22, 2010, Mike Samuel <...> wrote:
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* > On Thu, Jul 22, 2010, Rob 'Commander' Pike <...> wrote:
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* >> Personally, I would vote for the subdued style godoc presents at http://golang.org
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* >>
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* >> Not as fancy as some like, but a case can be made it's the official style.
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* >> If people want more colors, I wouldn't fight too hard, in the interest of
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* >> encouragement through familiarity, but even then I would ask to shy away
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* >> from technicolor starbursts.
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* >
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* > Like http://golang.org/pkg/go/scanner/ where comments are blue and all
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* > other content is black? I can do that.
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* </pre>
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*
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* @author mikesamuel@gmail.com
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*/
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PR['registerLangHandler'](
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PR['createSimpleLexer'](
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[
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// Whitespace is made up of spaces, tabs and newline characters.
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[PR['PR_PLAIN'], /^[\t\n\r \xA0]+/, null, '\t\n\r \xA0'],
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// Not escaped as a string. See note on minimalism above.
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[PR['PR_PLAIN'], /^(?:\"(?:[^\"\\]|\\[\s\S])*(?:\"|$)|\'(?:[^\'\\]|\\[\s\S])+(?:\'|$)|`[^`]*(?:`|$))/, null, '"\'']
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],
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[
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// Block comments are delimited by /* and */.
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// Single-line comments begin with // and extend to the end of a line.
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[PR['PR_COMMENT'], /^(?:\/\/[^\r\n]*|\/\*[\s\S]*?\*\/)/],
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[PR['PR_PLAIN'], /^(?:[^\/\"\'`]|\/(?![\/\*]))+/i]
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]),
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['go']);
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