def p_assign_err(p):
"""
void : expression ASSIGN
| expression PLUS_EQUAL
| expression MINUS_EQUAL
"""
tell_error(p, 2, "The left-hand-side of :=/+=/-= must be a variable name, not an expression.")
raise SyntaxError
def p_expr_block_err(p):
"block : '(' error ')'"
tell_error(p, 0, "Block doesn't contain valid list of statements")
def p_condition_err(p):
"condition : '(' error ')'"
tell_error(p, 0, "Condition should be a (single) expression.")
def p_expr_err(p):
"expression_list : expression error ','"
tell_error(p, 0, "Error while parsing an expression.")
def p_expr_string_err(p):
"expression : error STRING"
tell_error(p, 2, """Strings can't be used as expressions; they can only appear as part of $...="..." or $...+"...".""")