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lambda_expr_test.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "hash.h"
#include "list.h"
#include "lambda_expr.h"
#include "lambda_parser.h"
int main() {
struct lambda_expr * node1, * node2, * node3, * node4, * node5, * node6, * node7, * node8, * node9, * node10, * node11, * node12, * root;
struct lambda_expr * result;
char * xstring, * ystring, * fstring, * wstring, * zstring;
struct lambda_search_state * state1, * state2, * stack_top;
struct list * stack;
/***** // Testing the print function.
struct lambda_expr * node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = "x";
add_to_hash( node1->free, "x", (void *) 1 );
struct lambda_expr * node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = "y";
add_to_hash( node2->free, "y", (void *) 1 );
struct lambda_expr * node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = "y";
add_to_hash( node3->free, "y", (void *) 1 );
struct lambda_expr * node4 = new_lambda_expr();
strcpy( node4->type, "VAR" );
node4->data = "z";
add_to_hash( node4->free, "z", (void *) 1 );
struct lambda_expr * node5 = new_lambda_expr();
strcpy( node5->type, "VAR" );
node5->data = "y";
add_to_hash( node5->free, "y", (void *) 1 );
struct lambda_expr * node6 = new_lambda_expr();
strcpy( node6->type, "BETA" );
add_pairs_to_hash( node6->free, 2,
"x", (void *) 1,
"y", (void *) 1
);
node6->child[0] = node1;
node6->child[1] = node2;
struct lambda_expr * node7 = new_lambda_expr();
strcpy( node7->type, "VAR" );
node7->data = "z";
add_to_hash( node7->free, "z", (void *) 1 );
struct lambda_expr * node8 = new_lambda_expr();
strcpy( node8->type, "LAMBDA" );
add_to_hash( node8->bound, "y", (void *) 1 );
add_to_hash( node8->free, "z", (void *) 1 );
node8->child[0] = node3;
node8->child[1] = node4;
struct lambda_expr * node9 = new_lambda_expr();
strcpy( node9->type, "LAMBDA" );
add_to_hash( node9->bound, "y", (void *) 1 );
add_to_hash( node9->free, "x", (void *) 1 );
node9->child[0] = node5;
node9->child[1] = node6;
struct lambda_expr * node10 = new_lambda_expr();
strcpy( node10->type, "LAMBDA" );
add_pairs_to_hash( node10->bound, 2,
"y", (void *) 1,
"z", (void *) 1
);
node10->child[0] = node7;
node10->child[1] = node8;
struct lambda_expr * node11 = new_lambda_expr();
strcpy( node11->type, "VAR" );
node11->data = "x";
add_to_hash( node11->free, "x", (void *) 1 );
struct lambda_expr * node12 = new_lambda_expr();
strcpy( node12->type, "BETA" );
add_pairs_to_hash( node12->bound, 2,
"y", (void *) 1 ,
"z", (void *) 1
);
add_to_hash( node12->free, "x", (void *) 1 );
node12->child[0] = node9;
node12->child[1] = node10;
struct lambda_expr * root = new_lambda_expr();
strcpy( root->type, "LAMBDA" );
add_pairs_to_hash( root->bound, 3,
"x", (void *) 1,
"y", (void *) 1,
"z", (void *) 1
);
root->child[0] = node11;
root->child[1] = node12;
printf( "The expression looks like:\n<br />" );
printf( "%s", print_lambda_expr(root) );
// End Testing the print function
****/
/**** // Begin Testing the update_variables function
struct lambda_expr * node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = "x";
struct lambda_expr * node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = "y";
struct lambda_expr * node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = "y";
struct lambda_expr * node4 = new_lambda_expr();
strcpy( node4->type, "VAR" );
node4->data = "z";
struct lambda_expr * node5 = new_lambda_expr();
strcpy( node5->type, "VAR" );
node5->data = "y";
struct lambda_expr * node6 = new_lambda_expr();
strcpy( node6->type, "BETA" );
node6->child[0] = node1;
node6->child[1] = node2;
struct lambda_expr * node7 = new_lambda_expr();
strcpy( node7->type, "VAR" );
node7->data = "z";
struct lambda_expr * node8 = new_lambda_expr();
strcpy( node8->type, "LAMBDA" );
node8->child[0] = node3;
node8->child[1] = node4;
struct lambda_expr * node9 = new_lambda_expr();
strcpy( node9->type, "LAMBDA" );
node9->child[0] = node5;
node9->child[1] = node6;
struct lambda_expr * node10 = new_lambda_expr();
strcpy( node10->type, "LAMBDA" );
node10->child[0] = node7;
node10->child[1] = node8;
struct lambda_expr * node11 = new_lambda_expr();
strcpy( node11->type, "VAR" );
node11->data = "x";
struct lambda_expr * node12 = new_lambda_expr();
strcpy( node12->type, "BETA" );
node12->child[0] = node9;
node12->child[1] = node10;
struct lambda_expr * root = new_lambda_expr();
strcpy( root->type, "LAMBDA" );
root->child[0] = node11;
root->child[1] = node12;
printf( "Before running update_varialbes, expression looks like:\n<br />" );
printf( "%s", print_lambda_expr(root) );
update_variables(root);
printf( "AFter updating variables, the expression looks like:\n<br />" );
printf( "%s", print_lambda_expr(root) );
// Simulate substituting node10 for occurrences of 'y' ( node2 ) in node6.
remove_lambda_expr_node(node2);
node6->child[1] = node10;
remove_lambda_expr_node(node5);
remove_lambda_expr_node(node9);
remove_lambda_expr_node(node12);
root->child[1] = node6;
// Now print out the intermediate step...
printf( "After simulating a substitution, the expression looks like:\n<br />" );
printf( "%s\n<br />", print_lambda_expr(root) );
// Update the variables, and print the result again.
update_variables(root);
printf( "AFter updating the variables, the expression looks like:\n<br />" );
printf( "%s\n<br />", print_lambda_expr(root) );
/****/ // End testing update_variables function.
/**** // Begin testing fresh_variable function.
struct hash * test_V = new_hash();
add_pairs_to_hash( test_V, 3,
"x", (void *) 1,
"x'", (void *) 1,
"x'y", (void *) 1
);
char * fresh_variable_result = fresh_variable( "x", test_V );
printf( "The result of fresh_variable is: <br />\n" );
printf( "%s<br />\n", fresh_variable_result );
/****/ // End testing fresh_variable function.
/**** // Begin testing rename function.
char * fstring = malloc( 2*sizeof(char));
strcpy( fstring, "f" );
char * xstring = malloc( 2*sizeof(char));
strcpy( xstring, "x" );
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = fstring;
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = xstring;
node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = fstring;
node4 = new_lambda_expr();
strcpy( node4->type, "BETA" );
node4->child[0] = node1;
node4->child[1] = node2;
node5 = new_lambda_expr();
strcpy( node5->type, "VAR" );
node5->data = xstring;
node6 = new_lambda_expr();
strcpy( node6->type, "BETA" );
node6->child[0] = node3;
node6->child[1] = node4;
node7 = new_lambda_expr();
strcpy( node7->type, "VAR" );
node7->data = fstring;
node8 = new_lambda_expr();
strcpy( node8->type, "LAMBDA" );
node8->child[0] = node5;
node8->child[1] = node6;
root = new_lambda_expr();
strcpy( root->type, "LAMBDA" );
root->child[0] = node7;
root->child[1] = node8;
update_variables(root);
printf( "The node about to have rename_var run on it looks like: \n" );
printf( "%s<br />\n", print_lambda_expr(root) );
char * fprime_string = malloc( 3*sizeof(char) );
strcpy( fprime_string, "f'" );
rename_var( fstring, fprime_string, root );
printf( "AFter renaming f to f', the expression looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr(root) );
update_variables(root);
printf( "After updating variables, the expression looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr(root) );
/****/ // End testing rename function.
/**** // Begin testing substitute function.
// Use centralized strings.
char * xstring = "x";
char * ystring = "y";
char * fstring = "f";
// Build source expression.
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = fstring;
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = xstring;
node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = xstring;
node4 = new_lambda_expr();
strcpy( node4->type, "BETA" );
node4->child[0] = node1;
node4->child[1] = node2;
struct lambda_expr * source = new_lambda_expr();
strcpy( source->type, "LAMBDA" );
source->child[0] = node3;
source->child[1] = node4;
update_variables(source);
// Build expr
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = xstring;
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = ystring;
node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = ystring;
node4 = new_lambda_expr();
strcpy( node4->type, "BETA" );
node4->child[0] = node1;
node4->child[1] = node2;
struct lambda_expr * expr = new_lambda_expr();
strcpy( expr->type, "LAMBDA" );
expr->child[0] = node3;
expr->child[1] = node4;
update_variables(expr);
struct hash * V = new_hash();
add_pairs_to_hash( V, 3,
xstring, (void *) 1,
ystring, (void *) 1,
fstring, (void *) 1
);
printf( "The source expression looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr(source) );
printf( "The expr looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr(expr) );
result = substitute( expr, fstring, source, V );
update_variables(result);
printf( "After substituting expr for occurrences of f in source, the result looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr(result) );
/****/ // End testing substitute function.
/*
//
// Testing
//
// Build lambda_expr.
xstring = malloc( 2 * sizeof( char ) );
sprintf( xstring, "x" );
ystring = malloc( 2 * sizeof( char ) );
sprintf( ystring, "y" );
zstring = malloc( 2 * sizeof( char ) );
sprintf( zstring, "z" );
wstring = malloc( 2 * sizeof( char ) );
sprintf( wstring, "w" );
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = xstring;
add_to_global_V( xstring, node1 );
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = ystring;
add_to_global_V( ystring, node2 );
node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = wstring;
add_to_global_V( wstring, node3 );
node4 = new_lambda_expr();
strcpy( node4->type, "VAR" );
node4->data = zstring;
add_to_global_V( zstring, node4 );
node5 = new_lambda_expr();
strcpy( node5->type, "LAMBDA" );
node5->child[0] = node2; node2->parents += 1;
node5->child[1] = node3; node3->parents += 1;
node6 = new_lambda_expr();
strcpy( node6->type, "BETA" );
node6->child[0] = node3; node3->parents += 1;
node6->child[1] = node4; node4->parents += 1;
node7 = new_lambda_expr();
strcpy( node7->type, "LAMBDA" );
node7->child[0] = node1; node1->parents += 1;
node7->child[1] = node2; node2->parents += 1;
node8 = new_lambda_expr();
strcpy( node8->type, "BETA" );
node8->child[0] = node5; node5->parents += 1;
node8->child[1] = node6; node6->parents += 1;
node9 = new_lambda_expr();
strcpy( node9->type, "BETA" );
node9->child[0] = node7; node7->parents += 1;
node9->child[1] = node8; node8->parents += 1;
node10 = new_lambda_expr();
strcpy( node10->type, "ROOT" );
node10->child[0] = node9; node9->parents += 1;
update_variables(node10);
printf( "Before searching for the next beta-reduction, the expression looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr(node10) );
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node10;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node10;
state2->current = node9;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, (void *) state1 );
append_to_list( stack, (void *) state2 );
pre_order_traverse( stack, &process_beta_reduction );
stack_top = listlookup( stack, stack->next_index - 1 );
result = stack_top->current;
update_variables( result );
printf( "After reduction, the entire expression looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( result ) );
//
// TESTING
//
fstring = "f";
xstring = "x";
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = fstring;
add_to_global_V( fstring, node1 );
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = xstring;
add_to_global_V( xstring, node2 );
node3 = new_lambda_expr();
strcpy( node3->type, "BETA" );
node3->child[0] = node1; node1->parents += 1;
node3->child[1] = node2; node2->parents += 1;
node4 = new_lambda_expr();
strcpy( node4->type, "LAMBDA" );
node4->child[0] = node2; node2->parents += 1;
node4->child[1] = node3; node3->parents += 1;
node5 = new_lambda_expr();
strcpy( node5->type, "BETA" );
node5->child[0] = node4; node4->parents += 1;
node5->child[1] = node3; node3->parents += 1;
node6 = new_lambda_expr();
strcpy( node6->type, "LAMBDA" );
node6->child[0] = node1; node1->parents += 1;
node6->child[1] = node5; node5->parents += 1;
node7 = new_lambda_expr();
strcpy( node7->type, "ROOT" );
node7->child[0] = node6; node6->parents += 1;
update_variables( node7 );
printf("Before searching for a valid beta-reduction, node6 looks like:<br />\n");
printf( "%s<br />\n", print_lambda_expr(node6) );
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node7;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node7;
state2->current = node6;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, (void *) state1 );
append_to_list( stack, (void *) state2 );
pre_order_traverse( stack, &process_beta_reduction );
stack_top = listlookup( stack, stack->next_index - 1 );
result = stack_top->current;
update_variables( result );
printf( "After reduction, the entire expression looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( result ) );
*/
/*
//
// Testing
//
xstring = malloc( 2 * sizeof( char ) );
sprintf( xstring, "x" );
fstring = malloc( 2 * sizeof( char ) );
sprintf( fstring, "f" );
ystring = malloc( 2 * sizeof( char ) );
sprintf( ystring, "y" );
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = xstring;
add_to_global_V( xstring, node1 );
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = ystring;
add_to_global_V( ystring, node2 );
node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = fstring;
add_to_global_V( fstring, node3 );
node4 = new_lambda_expr();
strcpy( node4->type, "BETA" );
node4->child[0] = node1; node1->parents += 1;
node4->child[1] = node2; node2->parents += 1;
node5 = new_lambda_expr();
strcpy( node5->type, "LAMBDA" );
node5->child[0] = node1; node1->parents += 1;
node5->child[1] = node4; node4->parents += 1;
node6 = new_lambda_expr();
strcpy( node6->type, "BETA" );
node6->child[0] = node3; node3->parents += 1;
node6->child[1] = node2; node2->parents += 1;
node7 = new_lambda_expr();
strcpy( node7->type, "BETA" );
node7->child[0] = node5; node5->parents += 1;
node7->child[1] = node6; node6->parents += 1;
node8 = new_lambda_expr();
strcpy( node8->type, "ROOT" );
node8->child[0] = node7; node7->parents += 1;
update_variables( node8 );
printf( "The whole expression looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node8 ) );
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node8;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node8;
state2->current = node7;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, (void *) state1 );
append_to_list( stack, (void *) state2 );
pre_order_traverse( stack, &process_beta_reduction );
update_variables( node8 );
printf( "after reduction, the whole thing looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node8 ) );
*/
/*
//
// Testing
//
xstring = malloc( 2 * sizeof( char ) );
sprintf( xstring, "x" );
ystring = malloc( 2 * sizeof( char ) );
sprintf( ystring, "y" );
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = xstring;
add_to_global_V( xstring, node1 );
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = ystring;
add_to_global_V( ystring, node2 );
node3 = new_lambda_expr();
strcpy( node3->type, "LAMBDA" );
node3->child[0] = node1; node1->parents += 1;
node3->child[1] = node1; node1->parents += 1;
node4 = new_lambda_expr();
strcpy( node4->type, "LAMBDA" );
node4->child[0] = node1; node1->parents += 1;
node4->child[1] = node3; node3->parents += 1;
node5 = new_lambda_expr();
strcpy( node5->type, "BETA" );
node5->child[0] = node4; node4->parents += 1;
node5->child[1] = node2; node2->parents += 1;
node6 = new_lambda_expr();
strcpy( node6->type, "ROOT" );
node6->child[0] = node5; node5->parents += 1;
update_variables( node6 );
printf( "The whole expression looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node6 ) );
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node6;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node6;
state2->current = node5;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, (void *) state1 );
append_to_list( stack, (void *) state2 );
pre_order_traverse( stack, &process_beta_reduction );
update_variables( node6 );
printf( "after reduction, the whole thing looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node6 ) );
*/
/*
//
// Testing
//
xstring = malloc( 2 * sizeof( char ) );
sprintf( xstring, "x" );
ystring = malloc( 2 * sizeof( char ) );
sprintf( ystring, "y" );
zstring = malloc( 2 * sizeof( char ) );
sprintf( zstring, "z" );
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = xstring;
add_to_global_V( xstring, node1 );
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = ystring;
add_to_global_V( ystring, node2 );
node3 = new_lambda_expr();
strcpy( node3->type, "VAR" );
node3->data = zstring;
node4 = new_lambda_expr();
strcpy( node4->type, "LAMBDA" );
node4->child[0] = node1; node1->parents += 1;
node4->child[1] = node1; node1->parents += 1;
node5 = new_lambda_expr();
strcpy( node5->type, "BETA" );
node5->child[0] = node4; node4->parents += 1;
node5->child[1] = node3; node3->parents += 1;
node6 = new_lambda_expr();
strcpy( node6->type, "LAMBDA" );
node6->child[0] = node2; node3->parents += 1;
node6->child[1] = node5; node5->parents += 1;
node7 = new_lambda_expr();
strcpy( node7->type, "ROOT" );
node7->child[0] = node6; node6->parents += 1;
update_variables( node7 );
printf( "The whole expression looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node7 ) );
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node7;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node7;
state2->current = node6;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, (void *) state1 );
append_to_list( stack, (void *) state2 );
printf( "about to try and perform a beta-reduction.<br />\n" );
pre_order_traverse( stack, &process_beta_reduction );
update_variables( node7 );
printf( "after reduction, the whole thing looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node7 ) );
//
// TESTING
//
xstring = malloc( 2 * sizeof( char ) );
sprintf( xstring, "x" );
ystring = malloc( 2 * sizeof( char ) );
sprintf( ystring, "y" );
zstring = malloc( 2 * sizeof( char ) );
sprintf( zstring, "z" );
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = ystring;
add_to_global_V( ystring, node1 );
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = zstring;
add_to_global_V( zstring, node2 );
node3 = new_lambda_expr();
strcpy( node3->type, "LAMBDA" );
node3->child[0] = node2; node2->parents += 1;
node3->child[1] = node1; node1->parents += 1;
node4 = new_lambda_expr();
strcpy( node4->type, "BETA" );
node4->child[0] = node1; node1->parents += 1;
node4->child[1] = node2; node2->parents += 1;
node5 = new_lambda_expr();
strcpy( node5->type, "LAMBDA" );
node5->child[0] = node1; node1->parents += 1;
node5->child[1] = node3; node3->parents += 1;
node6 = new_lambda_expr();
strcpy( node6->type, "BETA" );
node6->child[0] = node5; node5->parents += 1;
node6->child[1] = node4; node4->parents += 1;
node7 = new_lambda_expr();
strcpy( node7->type, "ROOT" );
node7->child[0] = node6; node6->parents += 1;
update_variables( node7 );
printf( "The whole expression looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node7 ) );
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node7;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node7;
state2->current = node6;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, (void *) state1 );
append_to_list( stack, (void *) state2 );
pre_order_traverse( stack, &process_beta_reduction );
update_variables( node7 );
printf( "after reduction, the whole thing looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( node7 ) );
*/
/*
//
// Testing
//
fstring = malloc( 2 * sizeof( char ) );
sprintf( fstring, "f" );
xstring = malloc( 2 * sizeof( char ) );
sprintf( xstring, "x" );
node1 = new_lambda_expr();
strcpy( node1->type, "VAR" );
node1->data = fstring;
add_to_global_V( fstring, node1 );
node2 = new_lambda_expr();
strcpy( node2->type, "VAR" );
node2->data = xstring;
add_to_global_V( xstring, node2 );
node3 = new_lambda_expr();
printf( "node3 has address: %p<br />\n", node3 );
strcpy( node3->type, "BETA" );
node3->child[0] = node1; node1->parents += 1;
node3->child[1] = node2; node2->parents += 1;
node4 = new_lambda_expr();
strcpy( node4->type, "LAMBDA" );
node4->child[0] = node2; node2->parents += 1;
node4->child[1] = node3; node3->parents += 1;
node5 = new_lambda_expr();
strcpy( node5->type, "LAMBDA" );
node5->child[0] = node1; node1->parents += 1;
node5->child[1] = node4; node4->parents += 1;
node6 = new_lambda_expr();
strcpy( node6->type, "BETA" );
node6->child[0] = node5; node5->parents += 1;
node6->child[1] = node1; node1->parents += 1;
node7 = new_lambda_expr();
strcpy( node7->type, "BETA" );
node7->child[0] = node6; node6->parents += 1;
node7->child[1] = node2; node2->parents += 1;
node8 = new_lambda_expr();
strcpy( node8->type, "BETA" );
node8->child[0] = node6; node6->parents += 1;
node8->child[1] = node7; node7->parents += 1;
node9 = new_lambda_expr();
strcpy( node9->type, "ROOT" );
node9->child[0] = node8; node8->parents += 1;
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node9;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node9;
state2->current = node8;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, state1 );
append_to_list( stack, state2 );
update_variables( node9 );
printf( "Before trying to reduce the first time, the whole expression looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr(node9) );
int change = 0;
while ( change = pre_order_traverse( stack, &process_beta_reduction ) ) {
update_variables( node9 );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
}
printf( "Made it past the manual test.<br />\n" );
// char * test_string = "(\\x.y,z)";
char * test_string = "((\\f\\x(f,x),f),((\\f\\x(f,x),f),x))";
char * error;
fill_TABLE();
fill_GOTO();
fill_TRIE();
init_NODE_HASH();
printf( "About to try and parse the test string of %s<br />\n", test_string );
struct lambda_expr * parsed_result = parse( test_string, error );
printf( "made it past the parsing of the test string.<br />\n" );
// Propagate varnames to the evaluator's V hash.
set_global_V( hashlookup( get_NODE_HASH(), "VAR" )->data );
printf( "Before starting any reductions, the global V hash looks like:<br />\n" );
printf( "%s<br />\n", hashtreeprint( get_global_V(), "" ) );
node9 = new_lambda_expr();
strcpy( node9->type, "ROOT" );
node9->child[0] = parsed_result; parsed_result->parents += 1;
state1 = new_lambda_search_state();
state1->parent = NULL;
state1->current = node9;
state1->parent_choice = 0;
state1->progress = 0;
state2 = new_lambda_search_state();
state2->parent = node9;
state2->current = parsed_result;
state2->parent_choice = 0;
state2->progress = 0;
stack = new_list();
append_to_list( stack, state1 );
append_to_list( stack, state2 );
update_variables( node9 );
printf( "Before trying any reductions, the tree looks like: <br />\n" );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
change = 0;
while ( change = pre_order_traverse( stack, &process_beta_reduction ) ) {
update_variables( node9 );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
}
*/
/*
int change = pre_order_traverse( stack, &process_beta_reduction );
printf( "about to call update variables on node: %p<br />\n", node9 );
update_variables( node9 );
printf( "After reducing the first time ( with change = %d ), the whole expression looks like: <br />\n", change );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
printf( "About to call pre_order_traverse again.<br />\n" );
change = pre_order_traverse( stack, &process_beta_reduction );
printf( "Just got done calling pre_order_traverse the second time.<br />\n" );
printf( "about to call update_variables the second time, on node: %p<br />\n", node9 );
//exit(1);
update_variables( node9 );
printf( "Just got done calling update_variables the second time.<br />\n" );
printf( "After reducing the second time ( with change = %d ), the whole expression looks like: <br />\n", change );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
change = pre_order_traverse( stack, &process_beta_reduction );
printf( "Just got done calling pre_order_traverse the third time.<br />\n" );
printf( "about to call update_variables the third time, on node: %p<br />\n", node9 );
//exit(1);
update_variables( node9 );
printf( "Just got done calling update_variables the third time.<br />\n" );
printf( "After reducing the third time ( with change = %d ), the whole expression looks like: <br />\n", change );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
change = pre_order_traverse( stack, &process_beta_reduction );
printf( "Just got done calling pre_order_traverse the fourth time.<br />\n" );
printf( "about to call update_variables the fourth time, on node: %p<br />\n", node9 );
//exit(1);
update_variables( node9 );
printf( "Just got done calling update_variables the fourth time.<br />\n" );
printf( "After reducing the fourth time ( with change = %d ), the whole expression looks like: <br />\n", change );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
change = pre_order_traverse( stack, &process_beta_reduction );
printf( "Just got done calling pre_order_traverse the fifth time.<br />\n" );
printf( "about to call update_variables the fifth time, on node: %p<br />\n", node9 );
//exit(1);
update_variables( node9 );
printf( "Just got done calling update_variables the fifth time.<br />\n" );
printf( "After reducing the fifth time ( with change = %d ), the whole expression looks like: <br />\n", change );
printf( "%s<br />\n", print_lambda_expr( node9 ) );
*/
/*
// Testing bind_free_variable function.
char * source_string = "\\y(y,x)";
char * error;
fill_TABLE();
fill_GOTO();
fill_TRIE();
init_NODE_HASH();
struct lambda_expr * source = parse( source_string, &error );
update_variables( source );
printf( "The source expression looks like:<br />\n" );
printf( "%s<br />", print_lambda_expr( source ) );
char * x_string = "\\z.z";
struct lambda_expr * x = parse( x_string, &error );
update_variables( x );
printf( "The x expression looks like:<br />\n" );
printf( "%s<br />\n", print_lambda_expr( x ) );
struct hash * namespace = new_hash();
add_to_hash( namespace, "poop", (void *) x );
// Tell the evaluator about all the variables encountered during parsing.
set_global_V( hashlookup( get_NODE_HASH(), "VAR" )->data );
result = bind_free_variable( source, namespace );
printf( "After binding: <br />\n" );
if ( result ) {
printf( "%s<br />\n", print_lambda_expr( result ) );
}
else {
printf( "The result was null." );
}
*/
/*
// Testing the evaluate_namespace function.
char * error;
char * or_string = "\\p\\q((p,true),q)";