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-rw-r--r--src/primitives/conditional.d77
-rw-r--r--src/primitives/core.d101
-rw-r--r--src/primitives/eval.d53
3 files changed, 0 insertions, 231 deletions
diff --git a/src/primitives/conditional.d b/src/primitives/conditional.d
deleted file mode 100644
index ee89ea5..0000000
--- a/src/primitives/conditional.d
+++ /dev/null
@@ -1,77 +0,0 @@
-module src.primitives.conditional;
-
-import std.variant;
-import std.typecons;
-import std.container : DList;
-
-import src.stack;
-
-Nullable!(DList!Token) buffer;
-bool concluded = true;
-bool drop_mode = false;
-
-void capture(Token token) {
- if ( !drop_mode ) {
- buffer.insertBack(token);
- }
-}
-
-bool drop(Token token) {
- if ( concluded && buffer.isNull ) {
- return false;
- }
-
- if ( token.type == typeid(string) ) {
- switch ( *token.peek!string ) {
- case "if" : eval_if; break;
- case "then" : eval_then; break;
- case "else" : eval_else; break;
- default : capture(token); break;
- }
- } else {
- capture(token);
- }
-
- return true;
-}
-
-void eval_if() {
- if ( concluded ) {
- buffer = DList!Token();
- drop_mode = !stack.pop.get!bool;
- concluded = false;
- } else {
- throw new Exception("conditionals may not be nested directly");
- }
-}
-
-void eval_then() {
- if ( concluded ) {
- throw new Exception("`then` without preceding `if`");
- } else {
- drop_mode = !drop_mode;
- }
-}
-
-void eval_else() {
- if ( concluded ) {
- throw new Exception("`else` without preceding `if`");
- } else {
- drop_mode = false;
- concluded = true;
- }
-}
-
-bool dischargeable() {
- return concluded && !buffer.isNull;
-}
-
-Stack!Token discharge() {
- if ( concluded ) {
- Stack!Token result = buffer[];
- buffer.nullify;
- return result;
- } else {
- throw new Exception("unconcluded conditional may not be discharged");
- }
-}
diff --git a/src/primitives/core.d b/src/primitives/core.d
deleted file mode 100644
index 5b3d43d..0000000
--- a/src/primitives/core.d
+++ /dev/null
@@ -1,101 +0,0 @@
-module src.primitives.core;
-
-import std.stdio;
-
-import src.stack;
-import src.definition;
-
-Token[string] variables;
-
-void definition_start() {
- src.definition.start;
-}
-
-void binary_op_variable_bind() {
- string name = stack.pop.get!string;
- Token value = stack.pop;
- variables[name] = value;
-}
-
-void unary_op_variable_resolve() {
- string name = stack.pop.get!string;
-
- if ( name in variables ) {
- stack.push(variables[name]);
- }
-}
-
-void binary_op_add() {
- int b = stack.pop.get!int;
- int a = stack.pop.get!int;
-
- stack.push(a + b);
-}
-
-void binary_op_multiply() {
- int b = stack.pop.get!int;
- int a = stack.pop.get!int;
-
- stack.push(a * b);
-}
-
-void binary_op_divide() {
- int b = stack.pop.get!int;
- int a = stack.pop.get!int;
-
- if ( b == 0 ) {
- throw new Exception("division by 0 undefined");
- } else {
- stack.push(a / b);
- }
-}
-
-void binary_op_modulo() {
- int b = stack.pop.get!int;
- int a = stack.pop.get!int;
-
- if ( b == 0 ) {
- throw new Exception("modulo 0 undefined");
- } else {
- stack.push(a % b);
- }
-}
-
-void unary_op_io_print() {
- writeln(stack.top);
-}
-
-void unary_op_stack_pop() {
- stack.pop;
-}
-
-void unary_op_stack_dup() {
- stack.push(stack.top);
-}
-
-void binary_op_stack_swp() {
- auto b = stack.pop;
- auto a = stack.pop;
-
- stack.push(b);
- stack.push(a);
-
-}
-
-void binary_cond_lt() {
- int b = stack.pop.get!int;
- int a = stack.pop.get!int;
-
- stack.push(a < b);
-}
-
-void binary_cond_eq() {
- auto b = stack.pop;
- auto a = stack.pop;
-
- stack.push(a == b);
-}
-
-void integral_value_bool(bool value) {
- stack.push(Token(value));
-}
diff --git a/src/primitives/eval.d b/src/primitives/eval.d
deleted file mode 100644
index 08d8fb9..0000000
--- a/src/primitives/eval.d
+++ /dev/null
@@ -1,53 +0,0 @@
-module src.primitives.eval;
-
-import std.variant;
-
-import src.stack;
-import src.primitives.core;
-import conditional = src.primitives.conditional;
-
-bool evaluate_primitive(string word) {
- switch ( word ) {
- case "ยง" : definition_start; break;
- case "$" : binary_op_variable_bind; break;
- case "@" : unary_op_variable_resolve; break;
- case "if" : conditional.eval_if; break;
- case "then" : conditional.eval_then; break;
- case "else" : conditional.eval_else; break;
- case "+" : binary_op_add; break;
- case "*" : binary_op_multiply; break;
- case "/" : binary_op_divide; break;
- case "%" : binary_op_modulo; break;
- case "." : unary_op_io_print; break;
- case "pop" : unary_op_stack_pop; break;
- case "dup" : unary_op_stack_dup; break;
- case "swp" : binary_op_stack_swp; break;
- case "true" : integral_value_bool(true); break;
- case "false" : integral_value_bool(false); break;
- case "<" : binary_cond_lt; break;
- case "=" : binary_cond_eq; break;
- default : return false;
- }
-
- return true;
-}
-
-bool evaluate(Token token) {
- if ( conditional.drop(token) ) {
- return true;
- } else {
- return token.visit!(
- (int value) => false,
- (bool value) => false,
- (string word ) => evaluate_primitive(word)
- );
- }
-}
-
-Stack!Token result() {
- if ( conditional.dischargeable ) {
- return conditional.discharge;
- } else {
- return Stack!Token();
- }
-}