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module state.variable;
import std.variant;
import state.stack;
bool handle(string word) {
switch ( word ) {
case "$" : binary_op_variable_bind; return true;
case "@" : unary_op_variable_resolve; return true;
default : return false;
}
}
bool handle(Token token) {
return token.visit!(
(int ) => false,
(bool ) => false,
(string word) => handle(word),
(DList!int ) => false
);
}
private {
Token[string] variables;
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]);
}
}
}
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