From fad15f79b1230b3076be515d6894c8919562809b Mon Sep 17 00:00:00 2001 From: mitchell Date: Sat, 25 Apr 2020 16:26:31 -0400 Subject: Reformatted Lua LPeg lexers and added new convenience functions and pattern. `lexer.range()` replaces `lexer.delimited_range()` and `lexer.nested_pair()`. `lexer.to_eol()` replaces `patt * lexer.nonnewline^0` constructs. `lexer.number` replaces `lexer.float + lexer.integer`. Also added unit tests for lexer functions. --- lexlua/boo.lua | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) (limited to 'lexlua/boo.lua') diff --git a/lexlua/boo.lua b/lexlua/boo.lua index 907f72c19..926351f04 100644 --- a/lexlua/boo.lua +++ b/lexlua/boo.lua @@ -41,22 +41,23 @@ lex:add_rule('function', token(lexer.FUNCTION, word_match[[ lex:add_rule('identifier', token(lexer.IDENTIFIER, lexer.word)) -- Strings. -local sq_str = lexer.delimited_range("'", true) -local dq_str = lexer.delimited_range('"', true) -local triple_dq_str = '"""' * (lexer.any - '"""')^0 * P('"""')^-1 +local sq_str = lexer.range("'", true) +local dq_str = lexer.range('"', true) +local tq_str = lexer.range('"""') +local string = token(lexer.STRING, tq_str + sq_str + dq_str) local regex_str = #P('/') * lexer.last_char_includes('!%^&*([{-=+|:;,?<>~') * - lexer.delimited_range('/', true) -lex:add_rule('string', token(lexer.STRING, triple_dq_str + sq_str + dq_str) + - token(lexer.REGEX, regex_str)) + lexer.range('/', true) +local regex = token(lexer.REGEX, regex_str) +lex:add_rule('string', string + regex) -- Comments. -local line_comment = '#' * lexer.nonnewline_esc^0 -local block_comment = '/*' * (lexer.any - '*/')^0 * P('*/')^-1 +local line_comment = lexer.to_eol('#', true) +local block_comment = lexer.range('/*', '*/') lex:add_rule('comment', token(lexer.COMMENT, line_comment + block_comment)) -- Numbers. -lex:add_rule('number', token(lexer.NUMBER, (lexer.float + lexer.integer) * - (S('msdhsfFlL') + 'ms')^-1)) +lex:add_rule('number', token(lexer.NUMBER, lexer.number * + (S('msdhsfFlL') + 'ms')^-1)) -- Operators. lex:add_rule('operator', token(lexer.OPERATOR, S('!%^&*()[]{}-=+/|:;.,?<>~`'))) -- cgit v1.2.3