From 4804893a6616a312ac8028e42d2aa990018ffbe6 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Wed, 12 Apr 2017 16:58:18 +0200
Subject: Modularize primitives implementation, add stack manipulators

---
 src/primitives/eval.d | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 src/primitives/eval.d

(limited to 'src/primitives/eval.d')

diff --git a/src/primitives/eval.d b/src/primitives/eval.d
new file mode 100644
index 0000000..3f91e80
--- /dev/null
+++ b/src/primitives/eval.d
@@ -0,0 +1,48 @@
+module src.primitives.eval;
+
+import src.primitives.impl;
+
+bool evaluate(int value) {
+	return drop_mode;
+}
+
+bool evaluate(string word) {
+	if ( drop_mode ) {
+		if ( word == "then" ) {
+			return conditional_end;
+		} else {
+			return true;
+		}
+	}
+
+	switch ( word ) {
+		case "§":
+			return definition_start;
+		case "$":
+			return binary_op_variable_bind;
+		case "@":
+			return unary_op_variable_resolve;
+		case "if":
+			return conditional_start;
+		case "then":
+			return conditional_end;
+		case "+":
+			return binary_op_add;
+		case "*":
+			return binary_op_multiply;
+		case "/":
+			return binary_op_divide;
+		case "%":
+			return binary_op_modulo;
+		case ".":
+			return unary_op_io_print;
+		case "pop":
+			return unary_op_stack_pop;
+		case "dup":
+			return unary_op_stack_dup;
+		case "swp":
+			return binary_op_stack_swp;
+		default:
+			return false;
+	}
+}
-- 
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