Fix type conversions

README.md

@@ -75,7 +75,7 @@ build
         - [x] String operations
     - [x] Maths
     - [x] Comparisions
-    - [ ] Type conversions
+    - [x] Type conversions
     - [x] Functions
         - [x] Define functions
         - [x] Call functions
@@ -83,7 +83,7 @@ build
         - [x] Arguments for functions
         - [x] Jumping within functions
     - [x] Custom data structures
-    - [ ] Working with external libraries
+    - [x] Working with external libraries
 
 ## Debugger
 

docs/syntax.md

@@ -362,3 +362,23 @@ Looks in the path $GROUND_LIBS/`$libraryName`.grnd for the library. ($GROUND_LIB
 Attempts to import a shared library written in a compiled language like C or C++ for usage within the current program.
 
 Looks in the path $GROUND_LIBS/`$libraryName`.so for the library. ($GROUND_LIBS is a system environment variable.)
+
+### Data Structures
+
+#### struct -structName
+
+Creates a new struct which can be initialised. Until the endstruct keyword, the only valid instructions are init, set, fun, endfun, struct, and endstruct.
+
+Any value created inside the struct will be added to the struct.
+
+#### endstruct
+
+Ends the creation of a struct.
+
+#### getfield $object &fieldName &outputVar
+
+Gets a field from an initialised object. fieldName must be a valid name of a field in the object. Errors if the field does not exist. 
+
+#### setfield &object &fieldName $value
+
+Sets a field to a new value in the object. The value must be of the same type as the field's old value.

src/interpreter.c

@@ -443,6 +443,7 @@ GroundStruct parseStruct(GroundProgram* in, GroundScope* scope, size_t errorOffs
                     addInstructionToProgram(&gp, in->instructions[i]);
                     i++;
                 }
+                i--;
 
                 GroundFunction* function = parseFunction(&gp, errorOffset);
                 function->startLine = i;
@@ -509,6 +510,7 @@ GroundValue interpretGroundProgram(GroundProgram* in, GroundScope* inScope) {
                 addInstructionToProgram(&gp, in->instructions[i]);
                 i++;
             }
+            i--;
 
             GroundFunction* function = parseFunction(&gp, errorOffset);
             function->startLine = i;
@@ -546,6 +548,7 @@ GroundValue interpretGroundProgram(GroundProgram* in, GroundScope* inScope) {
                 addInstructionToProgram(&gp, in->instructions[i]);
                 i++;
             }
+            i--;
 
             GroundValue gv = {
                 .type = STRUCTVAL,
@@ -1104,7 +1107,7 @@ GroundValue interpretGroundInstruction(GroundInstruction inst, GroundScope* scop
             if (in->args.args[1].type != DIRREF) {
                 runtimeError(ARG_TYPE_MISMATCH, "Expecting a DirectRef for arg 2", in, currentInstruction);
             }
-            addVariable(scope->variables, in->args.args[2].value.refName, createIntGroundValue(atoll(in->args.args[0].value.value.data.stringVal)));
+            addVariable(scope->variables, in->args.args[1].value.refName, createIntGroundValue(atoll(in->args.args[0].value.value.data.stringVal)));
             break;
         }
         case STOD: {
@@ -1120,7 +1123,7 @@ GroundValue interpretGroundInstruction(GroundInstruction inst, GroundScope* scop
             if (in->args.args[1].type != DIRREF) {
                 runtimeError(ARG_TYPE_MISMATCH, "Expecting a DirectRef for arg 2", in, currentInstruction);
             }
-            addVariable(scope->variables, in->args.args[1].value.refName, createIntGroundValue(atof(in->args.args[0].value.value.data.stringVal)));
+            addVariable(scope->variables, in->args.args[1].value.refName, createDoubleGroundValue(atof(in->args.args[0].value.value.data.stringVal)));
             break;
         }
         case TOSTRING: {
@@ -1137,57 +1140,53 @@ GroundValue interpretGroundInstruction(GroundInstruction inst, GroundScope* scop
                 runtimeError(ARG_TYPE_MISMATCH, "Expecting a DirectRef for arg 2", in, currentInstruction);
             }
             GroundValue* value = &in->args.args[0].value.value;
+            char buf[256];
             switch (value->type) {
                 case INT: {
-                    char* buf = malloc(sizeof(char) * 256);
-                    snprintf(buf, sizeof(char) * 256, "%" PRId64, value->data.intVal);
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue(buf));
+                    snprintf(buf, sizeof(buf) * 256, "%" PRId64, value->data.intVal);
                     break;
                 }
                 case DOUBLE: {
-                    char* buf = malloc(sizeof(char) * 256);
-                    snprintf(buf, sizeof(char) * 256, "%f", value->data.doubleVal);
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue(buf));
+                    snprintf(buf, sizeof(buf) * 256, "%f", value->data.doubleVal);
                     break;
                 }
                 case STRING: {
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue(value->data.stringVal));
+                    snprintf(buf, sizeof(buf), "%s", value->data.stringVal);
                     break;
                 }
                 case CHAR: {
-                    char* buf = malloc(sizeof(char) * 2);
                     buf[0] = value->data.charVal;
                     buf[1] = '\0';
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue(buf));
                     break;
                 }
                 case BOOL: {
                     if (value->data.boolVal) {
-                        addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue("true"));
+                        snprintf(buf, sizeof(buf), "true");
                     } else {
-                        addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue("false"));
+                        snprintf(buf, sizeof(buf), "false");
                     }
                     break;
                 }
                 case LIST: {
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue("<list>"));
+                    snprintf(buf, sizeof(buf), "<list>");
                     break;
                 }
                 case FUNCTION: {
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue("<function>"));
+                    snprintf(buf, sizeof(buf), "<function>");
                     break;
                 }
                 case CUSTOM: {
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue("<custom>"));
+                    snprintf(buf, sizeof(buf), "<custom>");
                     break;
                 }
                 case NONE:
                 default: {
-                    addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue("<default>"));
+                    snprintf(buf, sizeof(buf), "<default>");
                     break;
 
                 }
             }
+            addVariable(scope->variables, in->args.args[1].value.refName, createStringGroundValue(buf));
 
             break;
         }

src/types.c

@@ -149,8 +149,47 @@ void printGroundValue(GroundValue* gv) {
             printf("<function>");
             break;
         }
-        default: {
-            printf("FIXME");
+        case STRUCTVAL: {
+            printf("<struct fields: { ");
+            for (size_t i = 0; i < gv->data.structVal->size; i++) {
+                if (i != 0) {
+                    printf(", ");
+                }
+                printf("%s: ", gv->data.structVal->fields[i].id);
+                if (gv->data.structVal->fields[i].value.type == STRING) {
+                    printf("\"");
+                    printGroundValue(&gv->data.structVal->fields[i].value);
+                    printf("\"");
+                } else {
+                    printGroundValue(&gv->data.structVal->fields[i].value);
+                }
+            }
+            printf(" }>");
+            break;
+        }
+        case CUSTOM: {
+            printf("<object fields: { ");
+            for (size_t i = 0; i < gv->customType->size; i++) {
+                if (i != 0) {
+                    printf(", ");
+                }
+                printf("%s: ", gv->customType->fields[i].id);
+                GroundObjectField* field = findField(*gv->data.customVal, gv->customType->fields[i].id);
+                if (field == NULL) {
+                    printf("<missing>");
+                } else {
+                    printGroundValue(&field->value);
+                }
+            }
+            printf(" }>");
+            break;
+        }
+        case ERROR: {
+            printf("<error type: %s, what: %s>", gv->data.errorVal.type, gv->data.errorVal.what);
+            break;
+        }
+        case NONE: {
+            printf("<none>");
             break;
         }
     }

tests/convs.grnd

@@ -1,3 +1,7 @@
-tostring 32 &int
+tostring 32 &str
+stoi "12" &int
+stod "3.14" &dou
 
+println $str
 println $int
+println $dou