We can codegen now

build.c

@@ -10,7 +10,7 @@ if [[ ! -v CFLAGS ]]; then
     CFLAGS="-O3 -Wall -Wextra -pedantic"
 fi
 
-gcc "$0" -o "$OUTPUT" $CFLAGS
+gcc "$0" -o "$OUTPUT" $CFLAGS -lgroundvm
 
 if not [ $# -lt 1 ]; then
     exec "./$OUTPUT" "$@"
@@ -43,7 +43,7 @@ exit
 #include "src/parser/parser.c"
 
 // -- CODEGEN --
-
+#include "src/codegen/codegen.c"
 
 // -- MAIN --
 #include "src/main.c"

src/codegen/codegen.c

@@ -0,0 +1,53 @@
+#include "codegen.h"
+
+#include <groundvm.h>
+#include "../parser/SolsNode.h"
+#include "../include/estr.h"
+
+// FIXME add proper erroring function
+char* createCodegenError(char* what) {
+    Estr estr = CREATE_ESTR(what);
+    APPEND_ESTR(estr, "\nthats an error");
+    return estr.str;
+}
+
+static inline ResultType(GroundProgram, charptr) generateLiteralNode(SolsNode* node) {
+    // We don't even need to do anything lmao
+    return Success(GroundProgram, charptr, groundCreateProgram());
+}
+
+static inline ResultType(GroundProgram, charptr) generatePutsNode(SolsNode* node) {
+    if (node->children.count < 1) {
+        return Error(GroundProgram, charptr, "puts requires arguments");
+    }
+    GroundInstruction inst = groundCreateInstruction(PRINTLN);
+    for (size_t i = 0; i < node->children.count; i++) {
+        groundAddReferenceToInstruction(&inst, node->children.at[i].accessArg);
+    }
+    GroundProgram program = groundCreateProgram();
+    groundAddInstructionToProgram(&program, inst);
+    return Success(GroundProgram, charptr, program);
+}
+
+ResultType(GroundProgram, charptr) generateCode(SolsNode* node) {
+
+    GroundProgram program = groundCreateProgram();
+
+    // Generate code for all children before generating this node's code
+    for (size_t i = 0; i < node->children.count; i++) {
+        ResultType(GroundProgram, charptr) generated = generateCode(&node->children.at[i]);
+        if (generated.error) {
+            return Error(GroundProgram, charptr, createCodegenError(generated.as.error));
+        }
+        for (size_t j = 0; j < generated.as.success.size; j++) {
+            groundAddInstructionToProgram(&program, generated.as.success.instructions[j]);
+        }
+    }
+
+    // Now generate code for this node
+    switch (node->type) {
+        case SNT_PUTS: generate(Puts);
+        case SNT_LITERAL: generate(Literal);
+    }
+    return Success(GroundProgram, charptr, program);
+}

src/codegen/codegen.h

@@ -0,0 +1,28 @@
+#ifndef CODEGEN_H
+#define CODEGEN_H
+
+#include <groundvm.h>
+#include "../parser/SolsNode.h"
+
+Result(GroundProgram, charptr);
+
+// Generates a GroundProgram (from the Ground VM header) from
+// a provided SolsNode. 
+// Returns:
+//    Success: Generated GroundProgram
+//    Failure: charptr detailing what happened
+ResultType(GroundProgram, charptr) generateCode(SolsNode* node);
+
+// Macro to help with code generation (and soon error handling)
+#define generate(nodetype) {\
+    ResultType(GroundProgram, charptr) __result = generate##nodetype##Node(node);\
+    if (__result.error) {\
+        return Error(GroundProgram, charptr, __result.as.error);\
+    }\
+    for (size_t i = 0; i < __result.as.success.size; i++) {\
+        groundAddInstructionToProgram(&program, __result.as.success.instructions[i]);\
+    }\
+    break;\
+}
+
+#endif

src/main.c

@@ -1,6 +1,9 @@
 #include "lexer/lexer.h"
 #include "parser/parser.h"
+#include "codegen/codegen.h"
+
 #include <stdio.h>
+#include <groundvm.h>
 
 char* getFileContents(const char* filename) {
     // https://stackoverflow.com/questions/3747086/reading-the-whole-text-file-into-a-char-array-in-c
@@ -69,5 +72,18 @@ int main(int argc, char** argv) {
         exit(1);
     }
 
-    return 0;
+    // Do codegen on root node
+    ResultType(GroundProgram, charptr) codegen = generateCode(&parser.as.success.output);
+    if (codegen.error) {
+        printf("%s\n", codegen.as.error);
+        exit(1);
+    }
+
+    // Run program on GroundVM
+    GroundValue retval = groundRunProgram(&codegen.as.success);
+    if (retval.type == INT) {
+        return retval.data.intVal;
+    } else {
+        return 0;
+    }
 }

src/parser/SolsNode.h

@@ -39,7 +39,7 @@ typedef struct SolsNode {
     } children;
     LineInfo line;
 
-    // Used by the code generator, do not use in the parser!
+    // Used by the code generator, unless value is a literal do not use in parser
     GroundArg accessArg;
 } SolsNode;
 

src/parser/parser.c

@@ -155,6 +155,33 @@ static inline ResultType(Nothing, charptr) parseLiteral(SolsParser* parser) {
         return Error(Nothing, charptr, err.str);
     }
     node.as.success.line = peek.as.success.line;
+    GroundValue value;
+    switch (peek.as.success.as.literal.type) {
+        case SLT_INT: {
+            value = groundCreateValue(INT, peek.as.success.as.literal.as.intv);
+            break;
+        }
+        case SLT_DOUBLE: {
+            value = groundCreateValue(DOUBLE, peek.as.success.as.literal.as.doublev);
+            break;
+        }
+        case SLT_STRING: {
+            value = groundCreateValue(STRING, peek.as.success.as.literal.as.stringv);
+            break;
+        }
+        case SLT_BOOL: {
+            value = groundCreateValue(BOOL, peek.as.success.as.literal.as.boolv);
+            break;
+        }
+        case SLT_CHAR: {
+            value = groundCreateValue(CHAR, peek.as.success.as.literal.as.charv);
+            break;
+        }
+    }
+    node.as.success.accessArg = (GroundArg) {
+        .type = VALUE,
+        .value.value = value
+    };
     addChildToSolsNode(parser->currentParent, node.as.success);
     return Success(Nothing, charptr, {});
 }