import re

# mode stuff (emacs/vi)
auto_mode_emacs = re.compile(r'-\*- ([^ ]+) -\*-')
auto_mode_vi    = re.compile('(?:vim|vi|ex):.+?(?:syntax|syn)=([^ ]+)')

# lexing
reserved_token_names = re.compile(r'^(?:rules|null|start|end|middle[0-9]*)$')
valid_token_name     = re.compile(r'^[a-zA-Z_][a-zA-Z0-9_]*$')
middle_token_name    = re.compile(r'^middle([0-9]+)$')

# meta regexes
meta_chars = re.compile(r'([\.\^\$\*\+\?\{\}\(\)\[\]\|\"\'\\,])')

# shell
shell_command = re.compile(r'^[^ ]+')

# whitespace regexes
leading_whitespace  = re.compile('^[ \t]*')
trailing_whitespace = re.compile(r'[ \t]*$')
whitespace          = re.compile(r'^[ \t\n]*$')
space               = re.compile('^ *$')
leading_whitespace2 = re.compile(r'^([ \t]*?)(.*?)\n?$')
internal_tab        = re.compile(r'\t *\t')

# word regexes
word      = re.compile('^[A-Za-z0-9_]+$')
word_char = re.compile('^[A-Za-z0-9_]$')

# perl regexes
perl_base           = re.compile("^sub ")
perl_hash_cleanup   = re.compile(r"^( *)([^ ]+|'(?:\.|[^'\'])*'|\"(?:\.|[^\\\"]*)\")( *)(=>)( *)([^ ].*)$")
perl_assign_cleanup = re.compile("^( *)((?:my |our )?[^ ]+)( *)(=(?!>))( *)([^ ].*)$")
perl_function       = re.compile("^ *sub ([A-Za-z_][A-Za-z0-9_]*)")

# python regexes
python_base           = re.compile("^[^ ]")
python_dict_cleanup   = re.compile(r"^( *)((?:[^'\":]|'(?:\.|[^\'])*'|\"(?:\.|[^\'])*)+?)( *)(:)( *)([^ ].*)$")
python_assign_cleanup = re.compile("^( *)([^ ]+)( *)(=)( *)([^ ].*)$")
python_scope          = re.compile('^( *)(class|def) ([A-Za-z_][A-Za-z0-9_]*)')
python_indent         = re.compile('^( *)')