From b3b0c807a75c4f854495b547d8e00a598979cbf6 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 3 Mar 2019 13:18:08 +0100
Subject: Add arithmetic (binop) parsing

---
 src/tokenizer.c | 42 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 37 insertions(+), 5 deletions(-)

(limited to 'src/tokenizer.c')

diff --git a/src/tokenizer.c b/src/tokenizer.c
index afaeb8e..152aec4 100644
--- a/src/tokenizer.c
+++ b/src/tokenizer.c
@@ -116,6 +116,8 @@ static CHECK_RESULT int string_to_float_unchecked(BufferView str, f64 *result) {
     return 0;
 }
 
+#define SET_BINOP(_binop_type) do { *token = TOK_BINOP; self->value.binop_type = (_binop_type); } while(0)
+
 static CHECK_RESULT int tokenizer_next(Tokenizer *self, Token *token);
 
 static CHECK_RESULT int __tokenizer_next(Tokenizer *self, Token *token) {
@@ -182,7 +184,6 @@ static CHECK_RESULT int __tokenizer_next(Tokenizer *self, Token *token) {
         self->value.string.size = string_end - self->index;
         self->index = string_end + 1;
         *token = TOK_STRING;
-        return TOKENIZER_OK;
     } else if(isDigit(c)) {
         int number_start;
         int dot_index;
@@ -225,10 +226,21 @@ static CHECK_RESULT int __tokenizer_next(Tokenizer *self, Token *token) {
             self->number_is_integer = bool_false;
         }
         *token = TOK_NUMBER;
-        return TOKENIZER_OK;
     } else if(c == '.') {
         ++self->index;
-        *token = TOK_DOT;
+        SET_BINOP(BINOP_DOT);
+    } else if(c == '+') {
+        ++self->index;
+        SET_BINOP(BINOP_ADD);
+    } else if(c == '-') {
+        ++self->index;
+        SET_BINOP(BINOP_SUB);
+    } else if(c == '*') {
+        ++self->index;
+        SET_BINOP(BINOP_MUL);
+    } else if(c == '/') {
+        ++self->index;
+        SET_BINOP(BINOP_DIV);
     } else if(c == '=') {
         ++self->index;
         *token = TOK_EQUALS;
@@ -250,6 +262,9 @@ static CHECK_RESULT int __tokenizer_next(Tokenizer *self, Token *token) {
     } else if(c == ';') {
         ++self->index;
         *token = TOK_SEMICOLON;
+    } else if(c == ':') {
+        ++self->index;
+        *token = TOK_COLON;
     } else if(c == '@') {
         const char *err_msg;
         ++self->index;
@@ -313,6 +328,19 @@ static usize strlen(const char *str) {
     return len;
 }
 
+/*
+static const char* binop_to_string(BinopType binop_type) {
+    switch(binop_type) {
+        case BINOP_DOT:     return ".";
+        case BINOP_ADD:     return "+";
+        case BINOP_SUB:     return "-";
+        case BINOP_MUL:     return "*";
+        case BINOP_DIV:     return "/";
+    }
+    assert(bool_false && "binop_to_string not implemented for binop_type");
+}
+*/
+
 static BufferView tokenizer_expected_token_as_string(Token token) {
     const char *str;
     switch(token) {
@@ -361,12 +389,16 @@ static BufferView tokenizer_expected_token_as_string(Token token) {
         case TOK_NUMBER:
             str = "number";
             break;
-        case TOK_DOT:
-            str = ".";
+        case TOK_BINOP:
+            /* TODO: binop_to_string */
+            str = "binop";
             break;
         case TOK_SEMICOLON:
             str = ";";
             break;
+        case TOK_COLON:
+            str = ":";
+            break;
         default:
             str = "Unknown token";
             break;
-- 
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