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#
# Pyrex Scanner - Lexical Definitions
#
# Changing anything in this file will cause Lexicon.pickle
# to be rebuilt next time pyrexc is run.
#
string_prefixes = "cCrR"
def make_lexicon():
from Pyrex.Plex import \
Str, Any, AnyBut, AnyChar, Rep, Rep1, Opt, Bol, Eol, Eof, \
TEXT, IGNORE, State, Lexicon
from Scanning import Method
letter = Any("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_")
digit = Any("0123456789")
octdigit = Any("01234567")
hexdigit = Any("0123456789ABCDEFabcdef")
indentation = Bol + Rep(Any(" \t"))
decimal = Rep1(digit)
dot = Str(".")
exponent = Any("Ee") + Opt(Any("+-")) + decimal
decimal_fract = (decimal + dot + Opt(decimal)) | (dot + decimal)
name = letter + Rep(letter | digit)
intconst = decimal | (Str("0x") + Rep1(hexdigit))
longconst = intconst + Str("L")
fltconst = (decimal_fract + Opt(exponent)) | (decimal + exponent)
imagconst = (intconst | fltconst) + Any("jJ")
# sq_string = (
# Str("'") +
# Rep(AnyBut("\\\n'") | (Str("\\") + AnyChar)) +
# Str("'")
# )
#
# dq_string = (
# Str('"') +
# Rep(AnyBut('\\\n"') | (Str("\\") + AnyChar)) +
# Str('"')
# )
#
# non_sq = AnyBut("'") | (Str('\\') + AnyChar)
# tsq_string = (
# Str("'''")
# + Rep(non_sq | (Str("'") + non_sq) | (Str("''") + non_sq))
# + Str("'''")
# )
#
# non_dq = AnyBut('"') | (Str('\\') + AnyChar)
# tdq_string = (
# Str('"""')
# + Rep(non_dq | (Str('"') + non_dq) | (Str('""') + non_dq))
# + Str('"""')
# )
#
# stringlit = Opt(Any(string_prefixes)) + (sq_string | dq_string | tsq_string| tdq_string)
beginstring = Opt(Any(string_prefixes)) + (Str("'") | Str('"') | Str("'''") | Str('"""'))
two_oct = octdigit + octdigit
three_oct = octdigit + octdigit + octdigit
two_hex = hexdigit + hexdigit
escapeseq = Str("\\") + (two_oct | three_oct | two_hex | AnyChar)
bra = Any("([{")
ket = Any(")]}")
punct = Any(":,;+-*/|&<>=.%`~^?")
diphthong = Str("==", "<>", "!=", "<=", ">=", "<<", ">>", "**",
"+=", "-=", "*=", "/=", "%=", "**=", "<<=", ">>=", "&=", "^=", "|=")
spaces = Rep1(Any(" \t\f"))
comment = Str("#") + Rep(AnyBut("\n"))
escaped_newline = Str("\\\n")
lineterm = Eol + Opt(Str("\n"))
return Lexicon([
(name, 'IDENT'),
(intconst, 'INT'),
(longconst, 'LONG'),
(fltconst, 'FLOAT'),
(imagconst, 'IMAG'),
(punct | diphthong, TEXT),
(bra, Method('open_bracket_action')),
(ket, Method('close_bracket_action')),
(lineterm, Method('newline_action')),
#(stringlit, 'STRING'),
(beginstring, Method('begin_string_action')),
(comment, IGNORE),
(spaces, IGNORE),
(escaped_newline, IGNORE),
State('INDENT', [
(Opt(spaces) + Opt(comment) + lineterm, IGNORE),
(indentation, Method('indentation_action')),
(Eof, Method('eof_action'))
]),
State('SQ_STRING', [
(escapeseq, 'ESCAPE'),
(Rep1(AnyBut("'\"\n\\")), 'CHARS'),
(Str('"'), 'CHARS'),
(Str("\n"), Method('unclosed_string_action')),
(Str("'"), Method('end_string_action')),
(Eof, 'EOF')
]),
State('DQ_STRING', [
(escapeseq, 'ESCAPE'),
(Rep1(AnyBut('"\n\\')), 'CHARS'),
(Str("'"), 'CHARS'),
(Str("\n"), Method('unclosed_string_action')),
(Str('"'), Method('end_string_action')),
(Eof, 'EOF')
]),
State('TSQ_STRING', [
(escapeseq, 'ESCAPE'),
(Rep1(AnyBut("'\"\n\\")), 'CHARS'),
(Any("'\""), 'CHARS'),
(Str("\n"), 'NEWLINE'),
(Str("'''"), Method('end_string_action')),
(Eof, 'EOF')
]),
State('TDQ_STRING', [
(escapeseq, 'ESCAPE'),
(Rep1(AnyBut('"\'\n\\')), 'CHARS'),
(Any("'\""), 'CHARS'),
(Str("\n"), 'NEWLINE'),
(Str('"""'), Method('end_string_action')),
(Eof, 'EOF')
]),
(Eof, Method('eof_action'))
],
# FIXME: Plex 1.9 needs different args here from Plex 1.1.4
#debug_flags = scanner_debug_flags,
#debug_file = scanner_dump_file
)
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