From 0981b9d6a12bd7aadbf9286459e033ac1a2ba910 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Tue, 12 Oct 2010 07:35:08 +0000
Subject: Ok, libbu++ compiles again, the basic parser system is getting there,
I think, it's still a little tricky becasue you have to do the non-terminal
prime seperation yourself (I forget what it's really called), but it's going
quite well. After a few tweaks to the core of it, we should be able to do
some math :)
---
src/tools/parser.cpp | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 79 insertions(+)
(limited to 'src/tools')
diff --git a/src/tools/parser.cpp b/src/tools/parser.cpp
index a70dfa4..e4fc95f 100644
--- a/src/tools/parser.cpp
+++ b/src/tools/parser.cpp
@@ -149,12 +149,91 @@ private:
QueueBuf qbIn;
};
+void redAdd( Bu::Parser &p )
+{
+}
+
+void redPrint( Bu::Parser &p )
+{
+}
+
int main( int argc, char *argv[] )
{
File fIn( argv[1], File::Read );
Parser p;
+ {
+ Parser::NonTerminal nt;
+ int iSelf = p.addNonTerminal("expr");
+ nt.addProduction(
+ Parser::Production(
+ Parser::State(
+ Parser::State::typeTerminal,
+ tokPlus
+ )
+ ).append(
+ Parser::State(
+ Parser::State::typeNonTerminal,
+ iSelf
+ )
+ ).append(
+ Parser::State(
+ Parser::State::typeReduction,
+ p.addReduction("add")
+ )
+ )
+ );
+ nt.addProduction(
+ Parser::Production()
+ );
+ p.addNonTerminal( "expr", nt );
+ }
+ {
+ Parser::NonTerminal nt;
+ nt.addProduction(
+ Parser::Production(
+ Parser::State(
+ Parser::State::typeTerminalPush,
+ tokNumber
+ )
+ ).append(
+ Parser::State(
+ Parser::State::typeNonTerminal,
+ p.getNonTerminalId("expr")
+ )
+ )
+ );
+ p.addNonTerminal( "expr'", nt );
+ }
+ {
+ Parser::NonTerminal nt;
+ nt.addProduction(
+ Parser::Production(
+ Parser::State(
+ Parser::State::typeNonTerminal,
+ p.getNonTerminalId("expr'")
+ )
+ ).append(
+ Parser::State(
+ Parser::State::typeTerminal,
+ tokCompute
+ )
+ ).append(
+ Parser::State(
+ Parser::State::typeReduction,
+ p.addReduction("print")
+ )
+ )
+ );
+ p.addNonTerminal("input", nt );
+ }
+
+ p.setRootNonTerminal("input");
+
+ p.setReduction("add", Bu::slot( &redAdd ) );
+ p.setReduction("print", Bu::slot( &redPrint ) );
+
p.pushLexer( new MathLexer( fIn ) );
p.parse();
--
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