Add lexer for OpenQASM files769/mtreinish/openqasm

This commit adds a lexer for the Open Quantum Assembly Language files.
The specification for this language is maintained here:
https://github.com/QISKit/openqasm

2 files changed, 65 insertions, 0 deletions

diff --git a/pygments/lexers/_mapping.py b/pygments/lexers/_mapping.py
index acb71ad9..b53add73 100644
--- a/pygments/lexers/_mapping.py
+++ b/pygments/lexers/_mapping.py
@@ -318,6 +318,7 @@ LEXERS = {
     'OocLexer': ('pygments.lexers.ooc', 'Ooc', ('ooc',), ('*.ooc',), ('text/x-ooc',)),
     'OpaLexer': ('pygments.lexers.ml', 'Opa', ('opa',), ('*.opa',), ('text/x-opa',)),
     'OpenEdgeLexer': ('pygments.lexers.business', 'OpenEdge ABL', ('openedge', 'abl', 'progress'), ('*.p', '*.cls'), ('text/x-openedge', 'application/x-openedge')),
+    'OpenQASMLexer': ('pygments.lexers.openqasm', 'OpenQASM', ('openqasm',), ('*.qasm',), ('text/x-csrc')),
     'PacmanConfLexer': ('pygments.lexers.configs', 'PacmanConf', ('pacmanconf',), ('pacman.conf',), ()),
     'PanLexer': ('pygments.lexers.dsls', 'Pan', ('pan',), ('*.pan',), ()),
     'ParaSailLexer': ('pygments.lexers.parasail', 'ParaSail', ('parasail',), ('*.psi', '*.psl'), ('text/x-parasail',)),
diff --git a/pygments/lexers/openqasm.py b/pygments/lexers/openqasm.py
new file mode 100644
index 00000000..4e0364a5
--- /dev/null
+++ b/pygments/lexers/openqasm.py
@@ -0,0 +1,64 @@
+# -*- coding: utf-8 -*-
+"""
+    pygments.lexers.openqasm
+    ~~~~~~~~~~~~~~~~~~~
+
+    Lexer for Open Quantum Assembly Language
+
+    :copyright: Copyright 2006-2018 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import RegexLexer, include, default, words
+from pygments.token import Keyword, Name, Text, Whitespace, Comment, Number
+
+
+__all__ = ['OpenQASMLexer']
+
+
+class OpenQASMLexer(RegexLexer):
+    """
+    For OpenQASM (Open Quantum Computing Assembly code.
+    """
+    name = 'OpenQASM'
+    aliases = ['openqasm']
+    filenames = ['qasm']
+    mimetypes = ['text/x-csrc']
+
+    tokens = {
+        'root': [
+            default('base'),
+        ],
+
+        'base': [
+            (r'\n', Whitespace),
+            (r'\s+', Whitespace),
+
+            ('qreg', Keyword.Declaration),
+            ('creg', Keyword.Declaration),
+            (words((
+                'cx', 'measure', 'if'), suffix=r'\b'),
+            Keyword),
+            (r'include\b', Keyword, 'incname'),
+            (r'//(.*?)\n', Comment.Single),
+            (r'gate\b', Keyword, 'gatename'),
+            (r'OPENQASM\b', Keyword, 'version'),
+        ],
+        'incname': [
+            (r'\s+', Text),
+            (r'[ia-zA-Z_]\w*', Name.Namespace, '#pop'),
+            default('#pop'),
+        ],
+        'gatename': [
+            (r'\s+', Text),
+            (r'[a-zA-Z_]\w*', Name.Function, '#pop'),
+            default('#pop'),
+        ],
+        'version': [
+           (r'[0-9][0-9_]*(\.[0-9_]+[eE][+\-]?[0-9_]+|'
+            '\.[0-9_]*(?!\.)|[eE][+\-]?[0-9_]+)', Number.Float),
+        ],
+
+    }