From 44d1f80279000efddbd8f24108f33297a9d2ad52 Mon Sep 17 00:00:00 2001
From: c
Date: Sat, 20 Apr 2024 09:34:44 -0400
Subject: Multiplication may now be possible.

It may have been possible before, too.
---
 src/doer.c         | 23 ++++++++++++++++++++++-
 src/include/doer.h |  4 ++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/doer.c b/src/doer.c
index bc6d4bd..683e183 100644
--- a/src/doer.c
+++ b/src/doer.c
@@ -77,7 +77,7 @@ tree_t* doer_find_target_from_call(doer_t* doer) {
       }
    }
 
-   DIE("Call to missing target.");
+   DIEF("Call to missing target: %s", call_name);
 }
 
 tree_t* doer_eval_prim(doer_t* doer) {
@@ -260,6 +260,25 @@ tree_t* blin_sub(doer_t* doer) {
    return newt;
 }
 
+tree_t* blin_mul(doer_t* doer) {
+   tree_t* tree = doer->tree;
+
+   tree_t* args = tree->data.call.arg;
+   tree_t* arg1 = args;
+   tree_t* arg2 = arg1->data.carg.nxt;
+
+   doer->tree = arg1->data.carg.val;
+   int a = doer_eval_lint(doer);
+   doer->tree = arg2->data.carg.val;
+   int b = doer_eval_lint(doer);
+
+   tree_t* newt =  tree_init(TREE_TYPE_LINT, tree->parent);
+
+   newt->data.lint.val = a * b;
+
+   return newt;
+}
+
 void doer_do_block(doer_t* doer) {
    if (!doer->tree) return;
    
@@ -274,7 +293,9 @@ void doer_do_block(doer_t* doer) {
 void doer_do_expr(doer_t* doer) {
    switch (doer->tree->type) {
       case TREE_TYPE_CALL:
+         // Add targets
          doer_do_call(doer);
+         // Remove targets
          break;
       case TREE_TYPE_DEF:
          doer_do_def(doer);
diff --git a/src/include/doer.h b/src/include/doer.h
index 14f0a31..24f3911 100644
--- a/src/include/doer.h
+++ b/src/include/doer.h
@@ -75,6 +75,9 @@ static tree_type_t blin_add_args[] = { TREE_TYPE_LINT, TREE_TYPE_LINT };
 // `-`: Subtract two integers.
 tree_t* blin_sub(doer_t* doer);
 static tree_type_t blin_sub_args[] = { TREE_TYPE_LINT, TREE_TYPE_LINT };
+// `*`: Multiply two integers.
+tree_t* blin_mul(doer_t* doer);
+static tree_type_t blin_mul_args[] = { TREE_TYPE_LINT, TREE_TYPE_LINT };
 
 void doer_do_call(doer_t* doer);
 tree_t* doer_do_call_blin(doer_t* doer);
@@ -95,6 +98,7 @@ static blinf_t blinfs[] = {
    { blin_str_cat, TREE_TYPE_LSTR, blin_str_cat_args, "str_cat" },
    { blin_add, TREE_TYPE_LINT, blin_add_args, "+" },
    { blin_sub, TREE_TYPE_LINT, blin_sub_args, "-" },
+   { blin_mul, TREE_TYPE_LINT, blin_mul_args, "*" },
 };
 
 #endif
-- 
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