Added optional Lua lexer support.

This support is disabled by default and must be enabled via compile-time option.

1 files changed, 63 insertions, 0 deletions

diff --git a/lexlua/powershell.lua b/lexlua/powershell.lua
new file mode 100644
index 000000000..17bf988fc
--- /dev/null
+++ b/lexlua/powershell.lua
@@ -0,0 +1,63 @@
+-- Copyright 2015-2018 Mitchell mitchell.att.foicica.com. See License.txt.
+-- PowerShell LPeg lexer.
+-- Contributed by Jeff Stone.
+
+local lexer = require('lexer')
+local token, word_match = lexer.token, lexer.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local lex = lexer.new('powershell')
+
+-- Whitespace.
+lex:add_rule('whitespace', token(lexer.WHITESPACE, lexer.space^1))
+
+-- Comments.
+lex:add_rule('comment', token(lexer.COMMENT, '#' * lexer.nonnewline^0))
+
+-- Keywords.
+lex:add_rule('keyword', token(lexer.KEYWORD, word_match([[
+  Begin Break Continue Do Else End Exit For ForEach ForEach-Object Get-Date
+  Get-Random If Param Pause Powershell Process Read-Host Return Switch While
+  Write-Host
+]], true)))
+
+-- Comparison Operators.
+lex:add_rule('comparison', token(lexer.KEYWORD, '-' * word_match([[
+  and as band bor contains eq ge gt is isnot le like lt match ne nomatch not
+  notcontains notlike or replace
+]], true)))
+
+-- Parameters.
+lex:add_rule('parameter', token(lexer.KEYWORD, '-' * word_match([[
+  Confirm Debug ErrorAction ErrorVariable OutBuffer OutVariable Verbose WhatIf
+]], true)))
+
+-- Properties.
+lex:add_rule('property', token(lexer.KEYWORD, '.' * word_match([[
+  day dayofweek dayofyear hour millisecond minute month second timeofday year
+]], true)))
+
+-- Types.
+lex:add_rule('type', token(lexer.KEYWORD, '[' * word_match([[
+  array boolean byte char datetime decimal double hashtable int long single
+  string xml
+]], true) * ']'))
+
+-- Variables.
+lex:add_rule('variable', token(lexer.VARIABLE,
+                               '$' * (lexer.digit^1 + lexer.word +
+                                      lexer.delimited_range('{}', true, true))))
+
+-- Strings.
+lex:add_rule('string', token(lexer.STRING, lexer.delimited_range('"', true)))
+
+-- Numbers.
+lex:add_rule('number', token(lexer.NUMBER, lexer.float + lexer.integer))
+
+-- Operators.
+lex:add_rule('operator', token(lexer.OPERATOR, S('=!<>+-/*^&|~.,:;?()[]{}%`')))
+
+-- Fold points.
+lex:add_fold_point(lexer.OPERATOR, '{', '}')
+
+return lex