From 285e907e48be4a67a5c3f5c8c641ec3c0f5529a8 Mon Sep 17 00:00:00 2001
From: Mart Lubbers <mart@martlubbers.net>
Date: Fri, 18 May 2018 12:17:56 +0200
Subject: [PATCH] Supposedly streameing

---
 Makefile |  2 +-
 lambda.h |  2 --
 lambda.y | 65 ++++++++++++++++++++++++--------------------------------
 main.c   | 11 ----------
 4 files changed, 29 insertions(+), 51 deletions(-)

diff --git a/Makefile b/Makefile
index 84b6636..79e13c7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CFLAGS:=-g -Wall -Wextra -pedantic
-lambda: lambda.tab.o lambda.yy.o main.o print.o mem.o reduce.o
+lambda: lambda.tab.o lambda.yy.o print.o mem.o reduce.o
 	$(LINK.c) $(LDLIBS) $^ $(OUTPUT_OPTION)
 
 %.tab.c: %.y
diff --git a/lambda.h b/lambda.h
index 457e5cf..8256f04 100644
--- a/lambda.h
+++ b/lambda.h
@@ -37,7 +37,5 @@ struct lambda *make_abstraction(char *, struct lambda *);
 struct lambda *make_application(struct lambda *, struct lambda *);
 struct lambda *make_numeral(unsigned int i);
 struct lambda *make_bool(bool b);
-void decls_free();
-void decls_print();
 #define YYSTYPE struct lambda *
 #endif
diff --git a/lambda.y b/lambda.y
index a9b0f14..813b77d 100644
--- a/lambda.y
+++ b/lambda.y
@@ -2,10 +2,11 @@
 %{
 #include "lambda.h"
 #include "lambda.tab.h"
+#include "lambda.yy.h"
 #include "mem.h"
 #include "print.h"
+#include "reduce.h"
 
-struct lambda *result;
 struct decllist *decls = NULL;
 extern int yylex();
 
@@ -17,6 +18,14 @@ void yyerror(const char *str)
 
 int yywrap()
 {
+	struct decllist *t;
+	while(decls != NULL){
+		free(decls->ident);
+		lambda_free(decls->value);
+		t = decls->next;
+		free(decls);
+		decls = t;
+	}
 	return 1;
 }
 
@@ -88,38 +97,11 @@ struct lambda *decls_lookup(char *ident)
 	return make_ident(ident);
 }
 
-void decls_print()
+int main()
 {
-	struct decllist *c = decls;
-	unsigned int maxlen = 0, len;
-	while(c != NULL){
-		len = strlen(c->ident);
-		maxlen = maxlen < len ? len : maxlen;
-		c = c->next;
-	}
-
-	c = decls;
-	while(c != NULL){
-		printf("%s ", c->ident);
-		len = strlen(c->ident);
-		for(unsigned int i = 1; i<maxlen-len; i++)
-			putchar(' ');
-		printf("= ");
-		lambda_print(c->value, NULL);
-		c = c->next;
-	}
-}
-
-void decls_free()
-{
-	struct decllist *t;
-	while(decls != NULL){
-		free(decls->ident);
-		lambda_free(decls->value);
-		t = decls->next;
-		free(decls);
-		decls = t;
-	}
+	int r = yyparse();
+	yylex_destroy();
+	return r;
 }
 
 %}
@@ -128,14 +110,23 @@ void decls_free()
 
 %%
 
+program
+	:
+	| lambda SEMICOLON program
 lambda
-	: decl lambda
-	| term
-		{ result = $$; }
-decl
-	: FUNC ASSIGN term SEMICOLON
+	: term
+		{
+			int maxdepth = 1000;
+			printf("     ");
+			lambda_reduce($1, $1, &maxdepth);
+			lambda_print($1, NULL);
+			lambda_free($1);
+		}
+	| FUNC ASSIGN term
 		{
 			decls_prepend($1->data.identifier.ident, $3);
+			printf("%s = ", $1->data.identifier.ident);
+			lambda_print($3, NULL);
 			lambda_free($1);
 		}
 term
diff --git a/main.c b/main.c
index 4269ff4..dce43c3 100644
--- a/main.c
+++ b/main.c
@@ -7,20 +7,9 @@
 #include "print.h"
 #include "mem.h"
 
-extern struct lambda *result;
-
 int main()
 {
 	int r = yyparse();
-	int maxdepth = 10000;
-	if(r == 0){
-		decls_print();
-		printf("     ");
-		lambda_reduce(result, result, &maxdepth);
-		lambda_print(result, NULL);
-	}
-	yylex_destroy();
-	lambda_free(result);
 	decls_free();
 	return r;
 }
-- 
2.20.1