feat: implement math in compiler

include/common/fzl_opcodes.h

@@ -4,9 +4,18 @@
 // Available opcodes
 typedef enum
 {
-  FZL_OPCODE_LOADCONST,   // Load const into T (temp) reg
-  FZL_OPCODE_PUSHARG,     // Push argument from T into args stack
-  FZL_OPCODE_CALL_BUILTIN // Call builtin function
+  FZL_OPCODE_LOADCONST,    // Load const into T (temp) reg
+  FZL_OPCODE_PUSHARG,      // Push argument from T into args stack
+  FZL_OPCODE_CALL_BUILTIN, // Call builtin function
+  FZL_OPCODE_PUSHNUM,      // Push number into stack
+
+  FZL_OPCODE_ADD, // Sum two numbers in arg strack
+  FZL_OPCODE_SUB, // Subract two numbers in arg stack
+  FZL_OPCODE_MUL, // Multiply two numbers in arg stack
+  FZL_OPCODE_DIV, // Divide two numbers in arg stack
+  FZL_OPCODE_POW, // Power first number in arg stack by second
+  FZL_OPCODE_MOD, // Get module of two numbers in arg stack
+  FZL_OPCODE_NEG, // Negotiate number in arg stack
 } fzl_opcode_t;
 
 #endif // FZL_OPCODES_H

include/compiler/fzl_parser.h

@@ -11,6 +11,17 @@ typedef enum
   FZL_NODETYPE_BLOCK,
   FZL_NODETYPE_CALL,
   FZL_NODETYPE_LITERAL,
+  FZL_NODETYPE_IDENTIFIER,
+
+  FZL_NODETYPE_ADD,
+  FZL_NODETYPE_SUB,
+  FZL_NODETYPE_MUL,
+  FZL_NODETYPE_DIV,
+  FZL_NODETYPE_POW,
+  FZL_NODETYPE_MOD,
+
+  FZL_NODETYPE_UNARY_PLUS,
+  FZL_NODETYPE_UNARY_MINUS
 } fzl_nodetype_t;
 
 // AST node descriptor
@@ -23,11 +34,34 @@ typedef struct fzl_node
 
   union
   {
+    // Array of nested nodes (for blocks, etc)
     struct
     {
       struct fzl_node **entries;
       size_t entry_count;
     } list;
+
+    // Call data
+    struct
+    {
+      struct fzl_node *callee;
+
+      struct fzl_node **args;
+      size_t args_count;
+    } call;
+
+    // Binary operations
+    struct
+    {
+      struct fzl_node *left;
+      struct fzl_node *right;
+    } binary_op;
+
+    // Unary operations
+    struct
+    {
+      struct fzl_node *operand;
+    } unary_op;
   };
 } fzl_node_t;
 

include/compiler/fzl_token.h

@@ -8,11 +8,22 @@
 // Token type
 typedef enum
 {
-  FZL_TOKTYPE_NAME,
-  FZL_TOKTYPE_LPAIR,
-  FZL_TOKTYPE_RPAIR,
-  FZL_TOKTYPE_COMMA,
-  FZL_TOKTYPE_STR_LITERAL
+  FZL_TOKTYPE_NAME, // abc
+
+  FZL_TOKTYPE_LPAREN, // (
+  FZL_TOKTYPE_RPAREN, // )
+
+  FZL_TOKTYPE_COMMA, // ,
+
+  FZL_TOKTYPE_STR_LITERAL, // ""
+  FZL_TOKTYPE_NUM_LITERAL, // 123
+
+  FZL_TOKTYPE_STAR,    // *
+  FZL_TOKTYPE_SLASH,   // /
+  FZL_TOKTYPE_PLUS,    // +
+  FZL_TOKTYPE_MINUS,   // -
+  FZL_TOKTYPE_CARET,   // ^
+  FZL_TOKTYPE_PERCENT, // %
 } fzl_toktype_t;
 
 // Token descriptor