42 lines
1.3 KiB
Lua
42 lines
1.3 KiB
Lua
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-- Copyright 2015-2019 Jason Schindler. See License.txt.
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-- Gherkin (https://github.com/cucumber/cucumber/wiki/Gherkin) LPeg lexer.
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local lexer = require('lexer')
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local token, word_match = lexer.token, lexer.word_match
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local P, R, S = lpeg.P, lpeg.R, lpeg.S
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local lex = lexer.new('gherkin', {fold_by_indentation = true})
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-- Whitespace.
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lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
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-- Keywords.
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lex:add_rule('keyword', token(lexer.KEYWORD, word_match[[
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And Background But Examples Feature Given Outline Scenario Scenarios Then When
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]]))
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-- Strings.
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local doc_str = '"""' * (lexer.any - '"""')^0 * P('"""')^-1
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local dq_str = lexer.delimited_range('"')
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lex:add_rule('string', token(lexer.STRING, doc_str + dq_str))
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-- Comments.
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lex:add_rule('comment', token(lexer.COMMENT, '#' * lexer.nonnewline^0))
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-- Numbers.
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local number = token(lexer.NUMBER, lexer.float + lexer.integer)
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-- Tags.
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lex:add_rule('tag', token('tag', '@' * lexer.word^0))
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lex:add_style('tag', lexer.STYLE_LABEL)
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-- Placeholders.
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lex:add_rule('placeholder', token('placeholder', lexer.nested_pair('<', '>')))
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lex:add_style('placeholder', lexer.STYLE_VARIABLE)
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-- Examples.
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lex:add_rule('example', token('example', '|' * lexer.nonnewline^0))
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lex:add_style('example', lexer.STYLE_NUMBER)
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return lex
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