parsing: Add language_constants

A few constants for a few languages just to get started. I expect those
to be replaced by a dynamic version later.

coalib/bearlib/parsing/language_constants.py

@@ -0,0 +1,62 @@
+"""
+This file contains tables that provide useful constants for specific languages.
+
+Each dictionary holds constants for some elements of the LANGUAGE enum. If
+the element is empty, there are no such things for this language. If no
+element is available yet, consider adding it yourself.
+"""
+from coalib.misc.Enum import enum
+
+"""
+This enum holds all languages for which the bearlib provides constants.
+"""
+LANGUAGES = enum(
+    "C",
+    "CSHARP",
+    "CPP",
+    "PYTHON3",
+    "PYTHON2",
+    "VALA",
+    "JAVA",
+    "OCTAVE",
+    "MATLAB",
+    "BASH",
+    "PHP",
+    "TEX")
+
+"""
+This dictionary holds for each LANGUAGE a dict with the beginning indication
+of a multiline string as the key and the associated end delimiter as the value.
+"""
+MULTILINE_STRING_DELIMITERS = {
+    LANGUAGES.PYTHON3: {'"""': '"""',
+                        "'''": "'''"},
+    LANGUAGES.CPP: {'R("': ')"'}}
+
+"""
+This dictionary holds for each LANGUAGE a dict with the beginning indication
+of a single line string as key and the associated end delimiter as the value.
+"""
+STRING_DELIMITERS = {
+    LANGUAGES.PYTHON3: {'"': '"',
+                        "'": "'"},
+    LANGUAGES.C: {'"': '"'},
+    LANGUAGES.CPP: {'"': '"'}}
+
+"""
+This dictionary holds for each LANGUAGE a list of delimiters usable for a
+single-line comment.
+"""
+COMMENT_DELIMITER = {
+    LANGUAGES.PYTHON3: ['#'],
+    LANGUAGES.C: ["//"],
+    LANGUAGES.CPP: ["//"]}
+
+"""
+This dictionary holds for each LANGUAGE a dict with the beginning indication of
+a multiline comment as key and the associated end delimiter as the value.
+"""
+MULTILINE_COMMENT_DELIMITERS = {
+    LANGUAGES.PYTHON3: {},
+    LANGUAGES.C: {"/*": "*/"},
+    LANGUAGES.CPP: {"/*": "*/"}}