Add support for Fantom language syntax highlighting

http://fantom.org/

1 files changed, 105 insertions, 0 deletions

diff --git a/lua/lexers/fantom.lua b/lua/lexers/fantom.lua
new file mode 100644
index 0000000..7056620
--- /dev/null
+++ b/lua/lexers/fantom.lua
@@ -0,0 +1,105 @@
+-- Fantom LPeg lexer.
+-- Based on Java LPeg lexer by Mitchell mitchell.att.foicica.com and Vim's Fantom syntax.
+-- By MarSoft.
+
+local l = require('lexer')
+local token, word_match = l.token, l.word_match
+local P, R, S = lpeg.P, lpeg.R, lpeg.S
+
+local M = {_NAME = 'fantom'}
+
+-- Whitespace.
+local ws = token(l.WHITESPACE, l.space^2)
+
+-- Comments.
+local line_comment = '//' * l.nonnewline_esc^0
+local block_comment = '/*' * (l.any - '*/')^0 * P('*/')^-1
+local doc_comment = '**' * l.nonnewline_esc^0
+local comment = token(l.COMMENT, line_comment + block_comment + doc_comment)
+
+-- Strings.
+local sq_str = l.delimited_range("'", true)
+local dq_str = l.delimited_range('"', true)
+local string = token(l.STRING, sq_str + dq_str)
+
+-- Numbers.
+local number = token(l.NUMBER, (l.float + l.integer) * S('LlFfDd')^-1)
+
+-- Keywords.
+local keyword = token(l.KEYWORD, word_match{
+  'using', 'native', -- external
+  'goto', 'void', 'serializable', 'volatile', -- error
+  'if', 'else', 'switch', -- conditional
+  'do', 'while', 'for', 'foreach', 'each', -- repeat
+  'true', 'false', -- boolean
+  'null', -- constant
+  'this', 'super', -- typedef
+  'new', 'is', 'isnot', 'as', -- operator
+  'plus', 'minus', 'mult', 'div', 'mod', 'get', 'set', 'slice', 'lshift', 'rshift', 'and', 'or', 'xor', 'inverse', 'negate', 'increment', 'decrement', 'equals', 'compare', -- long operator
+  'return', -- stmt
+  'static', 'const', 'final', -- storage class
+  'virtual', 'override', 'once', -- slot
+  'readonly', -- field
+  'throw', 'try', 'catch', 'finally', -- exceptions
+  'assert', -- assert
+  'class', 'enum', 'mixin', -- typedef
+  'break', 'continue', -- branch
+  'default', 'case',  -- labels
+  'public', 'internal', 'protected', 'private', 'abstract', -- scope decl
+})
+
+-- Types.
+local type = token(l.TYPE, word_match{
+  'Void', 'Bool', 'Int', 'Float', 'Decimal',
+  'Str', 'Duration', 'Uri', 'Type', 'Range',
+  'List', 'Map', 'Obj',
+  'Err', 'Env',
+})
+
+-- Identifiers.
+local identifier = token(l.IDENTIFIER, l.word)
+
+-- Operators.
+local operator = token(l.OPERATOR, S('+-/*%<>!=^&|?~:;.()[]{}#'))
+
+-- Annotations.
+local facet = token('facet', '@' * l.word)
+
+-- Functions.
+local func = token(l.FUNCTION, l.word) * #P('(')
+
+-- Classes.
+local class_sequence = token(l.KEYWORD, P('class')) * ws^1 *
+                       token(l.TYPE, l.word) * ( -- at most one inheritance spec
+                         ws^1 * token(l.OPERATOR, P(':')) * ws^1 *
+                         token(l.TYPE, l.word) *
+                         ( -- at least 0 (i.e. any number) of additional classes
+                           ws^0 * token(l.OPERATOR, P(',')) * ws^0 * token(l.TYPE, l.word)
+                         )^0
+                       )^-1
+
+M._rules = {
+  {'whitespace', ws},
+  {'class', class_sequence},
+  {'keyword', keyword},
+  {'type', type},
+  {'function', func},
+  {'identifier', identifier},
+  {'string', string},
+  {'comment', comment},
+  {'number', number},
+  {'facet', facet},
+  {'operator', operator},
+}
+
+M._tokenstyles = {
+  facet = l.STYLE_PREPROCESSOR
+}
+
+M._foldsymbols = {
+  _patterns = {'[{}]', '/%*', '%*/', '//'},
+  [l.OPERATOR] = {['{'] = 1, ['}'] = -1},
+  [l.COMMENT] = {['/*'] = 1, ['*/'] = -1, ['//'] = l.fold_line_comments('//')}
+}
+
+return M