Added BARE schema lexer (#1488)

2 files changed, 101 insertions, 0 deletions

diff --git a/pygments/lexers/_mapping.py b/pygments/lexers/_mapping.py
index 1c346c37..9cdddb6a 100644
--- a/pygments/lexers/_mapping.py
+++ b/pygments/lexers/_mapping.py
@@ -47,6 +47,7 @@ LEXERS = {
     'AutoItLexer': ('pygments.lexers.automation', 'AutoIt', ('autoit',), ('*.au3',), ('text/x-autoit',)),
     'AutohotkeyLexer': ('pygments.lexers.automation', 'autohotkey', ('ahk', 'autohotkey'), ('*.ahk', '*.ahkl'), ('text/x-autohotkey',)),
     'AwkLexer': ('pygments.lexers.textedit', 'Awk', ('awk', 'gawk', 'mawk', 'nawk'), ('*.awk',), ('application/x-awk',)),
+    'BareLexer': ('pygments.lexers.bare', 'BARE', ('bare',), ('*.bare',), ()),
     'BBCBasicLexer': ('pygments.lexers.basic', 'BBC Basic', ('bbcbasic',), ('*.bbc',), ()),
     'BBCodeLexer': ('pygments.lexers.markup', 'BBCode', ('bbcode',), (), ('text/x-bbcode',)),
     'BCLexer': ('pygments.lexers.algebra', 'BC', ('bc',), ('*.bc',), ()),
diff --git a/pygments/lexers/bare.py b/pygments/lexers/bare.py
new file mode 100644
index 00000000..658e7895
--- /dev/null
+++ b/pygments/lexers/bare.py
@@ -0,0 +1,100 @@
+# -*- coding: utf-8 -*-
+"""
+    pygments.lexers.bare
+    ~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Lexer for the BARE schema.
+
+    :copyright: Copyright 2020 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import RegexLexer, words, bygroups
+from pygments.token import Text, Comment, Keyword, Name, Literal
+
+__all__ = ['BareLexer']
+
+
+class BareLexer(RegexLexer):
+    """
+    For `BARE schema <https://baremessages.org>`_ schema source.
+
+    .. versionadded:: 2.7
+    """
+    name = 'BARE'
+    filenames = ['*.bare']
+    aliases = ['bare']
+
+    flags = re.MULTILINE | re.UNICODE
+
+    keywords = [
+        'type',
+        'enum',
+        'u8',
+        'u16',
+        'u32',
+        'u64',
+        'uint',
+        'i8',
+        'i16',
+        'i32',
+        'i64',
+        'int',
+        'f32',
+        'f64',
+        'bool',
+        'void',
+        'data',
+        'string',
+        'optional',
+        'map'
+    ]
+
+    tokens = {
+        'root': [
+            (r'(type)(\s+)([A-Z][a-zA-Z0-9]+)(\s+{)', bygroups(Keyword, Text, Name.Class, Text), 'struct'),
+            (r'(type)(\s+)([A-Z][a-zA-Z0-9]+)(\s+\()', bygroups(Keyword, Text, Name.Class, Text), 'union'),
+            (r'(type)(\s+)([A-Z][a-zA-Z0-9]+)(\s+)', bygroups(Keyword, Text, Name, Text), 'typedef'),
+            (r'(enum)(\s+)([A-Z][a-zA-Z0-9]+)(\s+{)', bygroups(Keyword, Text, Name.Class, Text), 'enum'),
+            (r'#.*?$', Comment),
+            (r'\s+', Text),
+        ],
+        'struct': [
+            (r'{', Text, '#push'),
+            (r'}', Text, '#pop'),
+            (r'([a-zA-Z0-9]+)(:\s*)', bygroups(Name.Attribute, Text), 'typedef'),
+            (r'\s+', Text),
+        ],
+        'union': [
+            (r'\)', Text, '#pop'),
+            (r'\s*\|\s*', Text),
+            (r'[A-Z][a-zA-Z0-9]+', Name.Class),
+            (words(keywords), Keyword),
+            (r'\s+', Text),
+        ],
+        'typedef': [
+            (r'\[\]', Text),
+            (r'#.*?$', Comment, '#pop'),
+            (r'(\[)(\d+)(\])', bygroups(Text, Literal, Text)),
+            (r'<|>', Text),
+            (r'\(', Text, 'union'),
+            (r'(\[)([a-z][a-z-A-Z0-9]+)(\])', bygroups(Text, Keyword, Text)),
+            (r'(\[)([A-Z][a-z-A-Z0-9]+)(\])', bygroups(Text, Name.Class, Text)),
+            (r'([A-Z][a-z-A-Z0-9]+)', Name.Class),
+            (words(keywords), Keyword),
+            (r'\n', Text, '#pop'),
+            (r'{', Text, 'struct'),
+            (r'\s+', Text),
+            (r'\d+', Literal),
+        ],
+        'enum': [
+            (r'{', Text, '#push'),
+            (r'}', Text, '#pop'),
+            (r'([A-Z][A-Z0-9_]*)(\s*=\s*)(\d+)', bygroups(Name.Attribute, Text, Literal)),
+            (r'([A-Z][A-Z0-9_]*)', bygroups(Name.Attribute)),
+            (r'#.*?$', Comment),
+            (r'\s+', Text),
+        ],
+    }