Lambdas begin to work!
This commit is contained in:
Sage Vaillancourt
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parent
a3bf8ab864
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@ -0,0 +1,215 @@
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#include "object.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#ifndef STANDALONE
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#define printf(...) stringObj(NULL, NULL)
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#endif
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int listLength(const Object *listObj)
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{
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if(!listObj || listObj->type != TYPE_LIST)
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return -1;
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Object *t = listObj->list;
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if(t == NULL)
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return 0;
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int len = 1;
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while(t->forward != NULL) {
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t = t->forward;
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len++;
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}
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return len;
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}
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Object *itemAt(const Object *listObj, int n)
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{
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if(!listObj || listObj->type != TYPE_LIST)
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return NULL;
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Object *march = listObj->list;
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for(int i = 0; i < n; i++) {
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march = march->forward;
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if(march == NULL)
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return NULL;
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}
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return march;
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}
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// Returns last object in list (->forward == NULL)
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Object *tail(const Object *listObj)
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{
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if(!listObj || listObj->type != TYPE_LIST)
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return NULL;
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Object *t = listObj->list;
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while(t->forward != NULL) {
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t = t->forward;
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}
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return t;
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}
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// Adds an object to the end of a list object
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void addToList(Object *dest, const Object src)
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{
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if(!dest || dest->type != TYPE_LIST)
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return;
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if(dest->list == NULL) {
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dest->list = malloc(sizeof(struct Object));
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*dest->list = src;
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dest->list->forward = NULL;
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return;
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}
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Object *end = tail(dest);
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end->forward = malloc(sizeof(struct Object));
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*end->forward = src;
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end->forward->forward = NULL;
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}
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// Puts a string version of the given object into a given string
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char* stringObj(char *dest, const Object *obj)
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{
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if(!dest || !obj)
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return NULL;
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if(obj->type == TYPE_NUMBER) {
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snprintf(dest, MAX_TOK_LEN, "%d", obj->number);
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} else if(obj->type == TYPE_SYMBOL) {
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snprintf(dest, MAX_TOK_LEN, "%s", obj->name);
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} else if(obj->type == TYPE_BOOL) {
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snprintf(dest, MAX_TOK_LEN, "%s", obj->number ? "T" : "F");
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} else if(obj->type == TYPE_ERROR) {
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snprintf(dest, MAX_TOK_LEN, "E%d", obj->err);
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} else {
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snprintf(dest, MAX_TOK_LEN, "%d", obj->number);
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}
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return dest;
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}
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int depth = 0;
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// Prints the given object
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void printObj(const Object *obj)
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{
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for(int i = 0; i < depth; i++)
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printf(" ");
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depth++;
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if(obj->type == TYPE_NUMBER) {
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printf("TYPE_NUMBER");
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} else if(obj->type == TYPE_BOOL) {
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printf("TYPE_BOOL");
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} else if(obj->type == TYPE_LIST) {
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printf("TYPE_LIST\n");
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printList(obj);
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depth--;
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return;
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} else if(obj->type == TYPE_FUNC) {
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printf("TYPE_FUNC");
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} else if(obj->type == TYPE_SYMBOL) {
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printf("TYPE_SYMBOL");
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} else if(obj->type == TYPE_LAMBDA) {
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printf("TYPE_LAMBDA Params:\n");
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depth++;
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printObj(&obj->lambda->params);
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for(int i = 1; i < depth; i++)
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printf(" ");
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printf("Lambda Body: \n");
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printObj(&obj->lambda->body);
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} else if(obj->type == TYPE_ERROR) {
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printf("TYPE_ERROR: ");
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} else {
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printf("TYPE_OTHER (as int)");
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}
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depth--;
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char temp[20] = "";
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stringObj(temp, obj);
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printf(": %s\n", temp);
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}
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void printList(const Object *list)
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{
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const Object *tail = list->list;
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if(tail == NULL) {
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for(int i = 0; i < depth; i++)
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printf(" ");
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printf("EMPTY LIST\n");
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return;
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}
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while(tail != NULL) {
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depth++;
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printObj(tail);
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depth--;
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tail = tail->forward;
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}
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}
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// Frees all objects in a list
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void deleteList(const Object *dest)
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{
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if(dest->type != TYPE_LIST) {
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printf("Tried to delete something other than a list\n");
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return;
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}
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Object *tail = dest->list;
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while(tail != NULL) {
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Object *prevTail = tail;
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tail = tail->forward;
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free(prevTail);
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}
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}
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inline Object listObject()
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{
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Object list;
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list.forward = NULL;
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list.type = TYPE_LIST;
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list.list = NULL;
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return list;
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}
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void copyList(Object *dest, const Object *src)
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{
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if(!dest || !src || dest->type != TYPE_LIST || src->type != TYPE_LIST)
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return;
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// deleteList(dest);
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const Object *march = src->list;
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while(march != NULL) {
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addToList(dest, *march);
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march = march->forward;
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}
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}
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inline Object numberObject(int num)
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{
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Object o;
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o.forward = NULL;
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o.type = TYPE_NUMBER;
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return o;
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}
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inline Object lambdaObject()
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{
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Object o;
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o.forward = NULL;
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o.type = TYPE_LAMBDA;
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o.lambda = malloc(sizeof(struct Lambda));
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return o;
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}
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inline Object errorObject(enum errorCode err)
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{
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Object o;
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o.forward = NULL;
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o.type = TYPE_ERROR;
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o.err = err;
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return o;
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}
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@ -0,0 +1,64 @@
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#ifndef OBJECT_H
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#define OBJECT_H
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#define MAX_TOK_LEN 4 // 11
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#define MAX_TOK_CNT 128 // 128
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#define MAX_ENV_ELM 15 // 50
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enum errorCode {
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BAD_LIST_OF_SYMBOL_STRINGS,
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TYPE_LIST_NOT_CAUGHT,
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NULL_ENV,
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BUILT_IN_NOT_FOUND,
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NULL_PARSE
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};
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typedef enum Type {
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TYPE_NUMBER,
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TYPE_BOOL,
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TYPE_LIST,
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TYPE_FUNC,
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TYPE_SYMBOL,
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TYPE_LAMBDA,
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TYPE_ERROR // Currently unused
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} Type;
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typedef struct Object Object;
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struct Lambda;
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struct Object {
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Type type;
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Object *forward;
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union {
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int number;
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Object *list;
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char name[MAX_TOK_LEN];
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Object (*func)(Object, Object);
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struct Lambda *lambda; // Maybe better as not a pointer
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enum errorCode err;
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};
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};
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// Maybe better as pointers
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struct Lambda {
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Object params;
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Object body;
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};
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char* stringObj(char *dest, const Object *obj);
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void printList(const Object *list);
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void printObj(const Object *obj);
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Object *tail(const Object *listObj);
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void addToList(Object *dest, Object src);
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void deleteList(const Object *dest);
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int listLength(const Object *listObj);
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Object *itemAt(const Object *listObj, int n);
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void copyList(Object *dest, const Object *src);
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Object listObject();
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Object numberObject(int num);
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Object lambdaObject();
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Object errorObject();
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#endif
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171
src/pebblisp.c
171
src/pebblisp.c
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@ -28,7 +28,11 @@ void debugSlice(struct Slice *s)
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Object fetchFromEnvironment(const char *name, struct Environment *env)
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{
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if(!env)
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return errorObject(NULL_ENV);
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printf("Fetching '%s' from env\n", name);
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printEnv(env);
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int i = 0;
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const char *next = env->strings[i];
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while(next != NULL) {
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@ -37,6 +41,10 @@ Object fetchFromEnvironment(const char *name, struct Environment *env)
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}
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next = env->strings[++i];
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}
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printf("Trying outer\n");
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if(env->outer) {
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return fetchFromEnvironment(name, env->outer);
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}
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printf("DID NOT FIND SYMBOL\n");
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Object o;
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o.type = TYPE_ERROR;
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@ -51,7 +59,7 @@ Result parse(struct Slice *slices)
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rest = &slices[1];
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} else {
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printf("Assigning null...\n");
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rest = NULL;
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return R(errorObject(NULL_PARSE), NULL);
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}
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if(token->text[0] == '(') {
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@ -103,8 +111,6 @@ Object parseAtom(struct Slice *s)
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Object evalDefArgs(const Object *arg_forms, struct Environment *env)
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{
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printf("evalDefArgs()\n");
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const Object *first_form = &arg_forms[0];
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const char *name = first_form->name;
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@ -122,69 +128,151 @@ Object evalIfArgs(const Object *arg_forms, struct Environment *env)
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eval(arg_forms->forward->forward, env);
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}
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Object evalBuiltIns(const Object *first, const Object *rest, int *found,
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Object evalLambdaArgs(const Object *arg_forms)
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{
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const Object *params_expr = &arg_forms[0];
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const Object *body_expr = &arg_forms[1];
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Object o = lambdaObject();
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o.lambda->params = listObject();
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copyList(&o.lambda->params, params_expr);
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o.lambda->body = listObject();
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copyList(&o.lambda->body, arg_forms->forward);
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return o;
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}
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void parseListOfSymbolStrings(const Object *form, const char **symbolStrings,
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int len)
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{
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if(!form || form->type != TYPE_LIST)
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return;
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for(int i = 0; i < len; i++)
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symbolStrings[i] = itemAt(form, i)->name;
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}
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struct Environment envForLambda(const Object *params, const Object *arg_forms,
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struct Environment *outer)
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{
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printf("\n#####################\nenvForLambda()\n");
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printObj(arg_forms);
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struct Environment env;
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env.outer = outer;
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env.strings = NULL;
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env.objects = NULL;
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int length = listLength(params);
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if(length == 0)
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return env;
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env.strings = calloc(sizeof(char*), length);
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env.objects = malloc(sizeof(Object) * length);
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Object vs[length];
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eval_forms(vs, arg_forms, outer);
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for(int i = 0; i < length; i++) {
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const char *n = itemAt(params, i)->name;
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addToEnv(&env, n, eval(&arg_forms[i], outer)); // May not need eval?
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} // Something is segfaulting, anyway
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env.strings[length] = NULL;
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printf("envForLambda env IT BROKE HERE()\n");
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printf("envForLambda length=%d\n", length);
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printEnv(&env);
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printf("END envForLambda()\n\n");
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return env;
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}
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Object evalBuiltIns(const Object *first, const Object *rest,
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struct Environment *env)
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{
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if(strcmp(first->name, "def") == 0) {
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*found = 0;
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return evalDefArgs(rest, env);
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}else if(strcmp(first->name, "if") == 0) {
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*found = 0;
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return evalIfArgs(rest, env);
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}else if(strcmp(first->name, "fn") == 0) {
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// printf("EVALBUILTINS first:\n");
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// printObj(first);
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// printf("\nEVALBUILTINS rest:\n");
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// printObj(rest);
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return evalLambdaArgs(rest);
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}
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Object o;
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*found = -1;
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return o;
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return errorObject(BUILT_IN_NOT_FOUND);
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}
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void eval_forms(Object *destList, const Object *src, struct Environment *env)
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{
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int length = listLength(src) - 1; // Not counting first_form
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for(int i = 0; i < length; i++) { // Evaluates all in list
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destList[i] = eval(itemAt(src, i + 1), env); // Skip the first
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}
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}
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Object eval(const Object *obj, struct Environment *env)
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{
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// printf("eval(): ");
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// printObj(obj);
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Object o = *obj;
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printf("eval():\n");
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printObj(obj);
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switch(obj->type) {
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case TYPE_NUMBER:
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case TYPE_BOOL:
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return o;
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return *obj;
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case TYPE_SYMBOL:
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o = fetchFromEnvironment(obj->name, env);
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printf("fetched object '%s':\n", obj->name);
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printObj(&o);
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return o;
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return fetchFromEnvironment(obj->name, env);
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case TYPE_LIST:
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{
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if(listLength(obj) == 1) {
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o = *obj->list;
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return o;
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if(listLength(obj) == 0) {
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printf("empty list\n"); return *obj;
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}
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Object first_form = *obj->list;
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if(listLength(obj) == 1)
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return eval(obj->list, env);
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Object *first_form = obj->list;
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{ // Try to eval built-ins
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int i = -1;
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Object built_in =
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evalBuiltIns(&first_form, first_form.forward, &i, env);
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evalBuiltIns(first_form, first_form->forward, env);
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if(i == 0)
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if(built_in.type != TYPE_ERROR)
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return built_in;
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}
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printf("\nNo built-ins found\n");
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Object first_eval = eval(&first_form, env);
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Object arg1 = eval(first_form.forward, env);
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Object arg2 = eval(first_form.forward->forward, env);
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Object first_eval = eval(first_form, env);
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if(first_eval.type == TYPE_FUNC) {
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int length = listLength(obj) - 1; // Not counting first_form
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Object rest[length];
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eval_forms(rest, obj, env);
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printf("Evaluating func\n");
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Object func_eval = first_eval.func(arg1, arg2);
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deleteList(obj);
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Object func_eval = first_eval.func(rest[0], rest[1]);
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// deleteList(obj);
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return func_eval;
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} else if (first_eval.type == TYPE_LAMBDA) {
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printf("lammy\n");
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struct Environment newEnv =
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envForLambda(&first_eval.lambda->params, first_form->forward, env);
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return eval(&first_eval.lambda->body, &newEnv);
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} else {
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return errorObject(TYPE_LIST_NOT_CAUGHT);
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}
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}
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case TYPE_LAMBDA:
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{
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Object o;
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o.type = TYPE_ERROR;
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printf("UNEXPECTED FORM\n");
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return o;
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}
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default:
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;
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}
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return o;
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return *obj;
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}
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Result resultFromObjAndSlices(Object obj, struct Slice *slices)
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@ -206,6 +294,20 @@ void addToEnv(struct Environment *env, const char *name, const Object obj)
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env->objects[i] = obj;
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break;
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}
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if(strcmp(env->strings[i], name) == 0) {
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env->objects[i] = obj;
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break;
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}
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}
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}
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void printEnv(struct Environment *env)
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{
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for(int i = 0; i < MAX_ENV_ELM; i++) {
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if(env->strings[i] == NULL)
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return;
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printf("env[%d]: '%s'\n ", i, env->strings[i]);
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printObj(&env->objects[i]);
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}
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}
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@ -290,6 +392,7 @@ void deleteEnv(struct Environment *e)
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struct Environment defaultEnv() {
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struct Environment e;
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e.outer = NULL;
|
||||
e.strings = malloc(sizeof(char*) * MAX_ENV_ELM);
|
||||
for(int i = 0; i < MAX_ENV_ELM; i++) {
|
||||
e.strings[i] = NULL;
|
||||
|
|
@ -317,11 +420,15 @@ Object parseEval(const char *input, struct Environment *env)
|
|||
while(debug->text) {
|
||||
char tok[MAX_TOK_LEN];
|
||||
copySlice(tok, debug);
|
||||
//printf("slice: '%s'\n", tok);
|
||||
debug++;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
Object parsed = parse(tokens).obj;
|
||||
// printf("PARSEEVAL() PRINTLIST():\n");
|
||||
// printObj(&parsed);
|
||||
// printf("end PARSEEVAL() PRINTLIST():\n\n");
|
||||
free(tokens);
|
||||
return eval(&parsed, env);
|
||||
}
|
||||
|
|
@ -335,7 +442,7 @@ int repl(struct Environment *env)
|
|||
fgets(input, 100, stdin);
|
||||
Object obj = parseEval(input, env);
|
||||
printObj(&obj);
|
||||
//break;
|
||||
// printEnv(env);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -19,6 +19,7 @@ typedef struct Result {
|
|||
struct Environment {
|
||||
char **strings;
|
||||
Object *objects;
|
||||
struct Environment *outer;
|
||||
};
|
||||
|
||||
Object eval(const Object *obj, struct Environment *env);
|
||||
|
|
@ -27,9 +28,13 @@ Result readSeq(struct Slice *slices);
|
|||
Object parseAtom(struct Slice *slice);
|
||||
void copySlice(char * dest, struct Slice *src);
|
||||
Object parseEval(const char *input, struct Environment *env);
|
||||
void eval_forms(Object *destList, const Object *src, struct Environment *env);
|
||||
|
||||
struct Environment defaultEnv();
|
||||
void deleteEnv(struct Environment *e);
|
||||
void addToEnv(struct Environment *env, const char *name, const Object obj);
|
||||
Object fetchFromEnvironment(const char *name, struct Environment *env);
|
||||
void printEnv(struct Environment *env);
|
||||
|
||||
Result resultFromObjAndSlices(Object obj, struct Slice *slices);
|
||||
Object add(Object obj1, Object obj2);
|
||||
|
|
|
|||
29
src/tags
29
src/tags
|
|
@ -4,19 +4,23 @@
|
|||
!_TAG_PROGRAM_NAME Exuberant Ctags //
|
||||
!_TAG_PROGRAM_URL http://ctags.sourceforge.net /official site/
|
||||
!_TAG_PROGRAM_VERSION 5.9~svn20110310 //
|
||||
BAD_LIST_OF_SYMBOL_STRINGS object.h /^ BAD_LIST_OF_SYMBOL_STRINGS,$/;" e enum:errorCode
|
||||
BUILT_IN_NOT_FOUND object.h /^ BUILT_IN_NOT_FOUND$/;" e enum:errorCode
|
||||
CALC_H calc.h 2;" d
|
||||
CODE_PKEY calc.h 11;" d
|
||||
END_PHRASE calc.h 9;" d
|
||||
Environment pebblisp.h /^struct Environment {$/;" s
|
||||
Lambda object.h /^struct Lambda {$/;" s
|
||||
MAX_ENV_ELM object.h 6;" d
|
||||
MAX_LENGTH calc.h 8;" d
|
||||
MAX_TOK_CNT object.h 5;" d
|
||||
MAX_TOK_LEN object.h 4;" d
|
||||
NULL_ENV object.h /^ NULL_ENV,$/;" e enum:errorCode
|
||||
OBJECT_H object.h 2;" d
|
||||
Object object.h /^struct Object {$/;" s
|
||||
Object object.h /^typedef struct Object Object;$/;" t typeref:struct:Object
|
||||
PEBBLISP_H pebblisp.h 2;" d
|
||||
R pebblisp.h 41;" d
|
||||
R pebblisp.h 45;" d
|
||||
Result pebblisp.h /^typedef struct Result {$/;" s
|
||||
Result pebblisp.h /^} Result;$/;" t typeref:struct:Result
|
||||
SMAX_LENGTH calc.h 7;" d
|
||||
|
|
@ -24,9 +28,11 @@ Slice pebblisp.h /^struct Slice {$/;" s
|
|||
TOKENS_H tokens.h 2;" d
|
||||
TOKEN_END calc.h 42;" d
|
||||
TYPE_BOOL object.h /^ TYPE_BOOL,$/;" e enum:Type
|
||||
TYPE_ERROR object.h /^ TYPE_ERROR$/;" e enum:Type
|
||||
TYPE_ERROR object.h /^ TYPE_ERROR \/\/ Currently unused$/;" e enum:Type
|
||||
TYPE_FUNC object.h /^ TYPE_FUNC,$/;" e enum:Type
|
||||
TYPE_LAMBDA object.h /^ TYPE_LAMBDA,$/;" e enum:Type
|
||||
TYPE_LIST object.h /^ TYPE_LIST,$/;" e enum:Type
|
||||
TYPE_LIST_NOT_CAUGHT object.h /^ TYPE_LIST_NOT_CAUGHT,$/;" e enum:errorCode
|
||||
TYPE_NUMBER object.h /^ TYPE_NUMBER,$/;" e enum:Type
|
||||
TYPE_SYMBOL object.h /^ TYPE_SYMBOL,$/;" e enum:Type
|
||||
Type object.h /^typedef enum Type {$/;" g
|
||||
|
|
@ -36,9 +42,11 @@ addToEnv pebblisp.c /^void addToEnv(struct Environment *env, const char *name, c
|
|||
addToList object.c /^void addToList(Object *dest, const Object src)$/;" f
|
||||
back_handler calc.c /^static void back_handler(ClickRecognizerRef recognizer, void *context) {$/;" f file:
|
||||
basicOp pebblisp.c /^Object basicOp(Object *obj1, Object *obj2, const char op)$/;" f
|
||||
bopf pebblisp.c 264;" d file:
|
||||
body object.h /^ Object body;$/;" m struct:Lambda
|
||||
bopf pebblisp.c 365;" d file:
|
||||
calculate calc.c /^static void calculate(){$/;" f file:
|
||||
click_config_provider calc.c /^static void click_config_provider(void *context) {$/;" f file:
|
||||
copyList object.c /^void copyList(Object *dest, const Object *src)$/;" f
|
||||
copySlice pebblisp.c /^void copySlice(char * dest, struct Slice *src)$/;" f
|
||||
debugSlice pebblisp.c /^void debugSlice(struct Slice *s)$/;" f
|
||||
defaultEnv pebblisp.c /^struct Environment defaultEnv() {$/;" f
|
||||
|
|
@ -47,10 +55,16 @@ deleteEnv pebblisp.c /^void deleteEnv(struct Environment *e)$/;" f
|
|||
deleteList object.c /^void deleteList(const Object *dest)$/;" f
|
||||
enter calc.c /^static void enter(){$/;" f file:
|
||||
env calc.h /^static struct Environment env;$/;" v typeref:struct:Environment
|
||||
envForLambda pebblisp.c /^struct Environment envForLambda(const Object *params, const Object *arg_forms,$/;" f
|
||||
err object.h /^ enum errorCode err;$/;" m union:Object::__anon1 typeref:enum:Object::__anon1::errorCode
|
||||
errorCode object.h /^enum errorCode {$/;" g
|
||||
errorObject object.c /^inline Object errorObject(enum errorCode err)$/;" f
|
||||
eval pebblisp.c /^Object eval(const Object *obj, struct Environment *env)$/;" f
|
||||
evalBuiltIns pebblisp.c /^Object evalBuiltIns(const Object *first, const Object *rest, int *found,$/;" f
|
||||
evalBuiltIns pebblisp.c /^Object evalBuiltIns(const Object *first, const Object *rest,$/;" f
|
||||
evalDefArgs pebblisp.c /^Object evalDefArgs(const Object *arg_forms, struct Environment *env)$/;" f
|
||||
evalIfArgs pebblisp.c /^Object evalIfArgs(const Object *arg_forms, struct Environment *env)$/;" f
|
||||
evalLambdaArgs pebblisp.c /^Object evalLambdaArgs(const Object *arg_forms, struct Environment *env)$/;" f
|
||||
eval_forms pebblisp.c /^void eval_forms(Object *destList, const Object *src, struct Environment *env)$/;" f
|
||||
fetchFromEnvironment pebblisp.c /^Object fetchFromEnvironment(const char *name, struct Environment *env)$/;" f
|
||||
forward object.h /^ Object *forward;$/;" m struct:Object
|
||||
func object.h /^ Object (*func)(Object, Object);$/;" m union:Object::__anon1
|
||||
|
|
@ -59,6 +73,9 @@ init calc.c /^static void init(void) {$/;" f file:
|
|||
isDigit tokens.c /^int isDigit(const char c) {$/;" f
|
||||
isSingle tokens.c /^int isSingle(const char c) {$/;" f
|
||||
isWhitespace tokens.c /^int isWhitespace(const char c) {$/;" f
|
||||
itemAt object.c /^Object *itemAt(const Object *listObj, int n)$/;" f
|
||||
lambda object.h /^ struct Lambda *lambda; \/\/ Maybe better as not a pointer$/;" m union:Object::__anon1 typeref:struct:Object::__anon1::Lambda
|
||||
lambdaObject object.c /^inline Object lambdaObject()$/;" f
|
||||
length pebblisp.h /^ char length;$/;" m struct:Slice
|
||||
list object.h /^ Object *list;$/;" m union:Object::__anon1
|
||||
listLength object.c /^int listLength(const Object *listObj)$/;" f
|
||||
|
|
@ -73,9 +90,13 @@ number object.h /^ int number;$/;" m union:Object::__anon1
|
|||
numberObject object.c /^inline Object numberObject(int num)$/;" f
|
||||
obj pebblisp.h /^ Object obj;$/;" m struct:Result
|
||||
objects pebblisp.h /^ Object *objects;$/;" m struct:Environment
|
||||
outer pebblisp.h /^ struct Environment *outer;$/;" m struct:Environment typeref:struct:Environment::Environment
|
||||
params object.h /^ Object params;$/;" m struct:Lambda
|
||||
parse pebblisp.c /^Result parse(struct Slice *slices)$/;" f
|
||||
parseAtom pebblisp.c /^Object parseAtom(struct Slice *s)$/;" f
|
||||
parseEval pebblisp.c /^Object parseEval(const char *input, struct Environment *env)$/;" f
|
||||
parseListOfSymbolStrings pebblisp.c /^void parseListOfSymbolStrings(const Object *form, const char **symbolStrings,$/;" f
|
||||
printEnv pebblisp.c /^void printEnv(struct Environment *env)$/;" f
|
||||
printList object.c /^void printList(const Object *list)$/;" f
|
||||
printObj object.c /^void printObj(const Object *obj)$/;" f
|
||||
printf object.c 7;" d file:
|
||||
|
|
|
|||
Loading…
Reference in New Issue