Hi all,
I'm programming a simple templating system. The simplest expression
I have to manage is:
" bla bla bla .. $FUNC ( bla bla bla.. ) bla bla.."
Here my code:
tokens = ( 'OTHER', 'FUNC' )
def t_FUNC(t):
r'\$FUNC'
return t
def t_OTHER(t):
r'[^ $]+'
return t
t_ignore = " \t"
def t_error(t):
print("Illegal character '%s'" % t.value[0])
t.lexer.skip(1)
import ply.lex as lex
lex.lex()
def p_expression(p):
'''expression : OTHER expression
| func expression
| empty'''
pass
def p_func(p):
"func : FUNC '(' expression ')'"
def p_empty(p):
'empty :'
pass
def p_error(p):
if p:
print("Syntax error at '%s'" % p.value)
else:
print("Syntax error at EOF")
import ply.yacc as yacc
yacc.yacc(debug=1)
yacc.parse(' bla bla $FUNC( bli bli ) ')
But I get the "Syntax error at '(' " error. Probably the "(" is
interpreted as "OTHER" and not as "func".
How can I solve?
I have the same problem with "FUNC"; it must start with "$"; if I
remove it (or if I put it into "OTHER" definition) the "FUNC" word is
interpreted as a "OTHER" token.
It's a precedence issue?
Thanks
Alessandro
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