It is confirmed that seems to work as expected, by swapping the lexeme_d with the node directive and it does really make sense. Appreciate it Steven for the help.
Date: Sun, 18 Oct 2009 11:53:11 -0700 From: watanabesj@gmail.com To: boost-users@lists.boost.org Subject: Re: [Boost-users] [boost::spirit] Help! Unexpected Leading spaces got injected into a parse tree node
AMDG
HT4N - wrote:
I have a question regarding unexpected leading spaces got injected into a parse tree node.
Here is my grammar:
Text = leaf_node_d[+digit_p] >> root_node_d[ch_p('=')] >> leaf_node_d[+digit_p];
If I parse "5=5", as expected no extra leading spaces added to the resulting tree nodes.
If I parse "5= 5" (read:5 followed by = followed by 4 spaces and followed by 5), given my grammar definition of leaf_node_d[+digit_p], I am expecting the parse tree node value should not contain any leading spaces. Yet, I see that the extra 4 spaces is stored in the corresponding parse tree node as shown below.
<snip> ==> <value> 5</value>
I am wondering if this is a by design or unexpected behavior. If it is a by design behavior, is there a way to trim leading/trailing spaces.
Perhaps you should use lexeme_d[leaf_node_d[+digit_p]]?
In Christ, Steven Watanabe
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