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author | Adrian Kummerlaender | 2017-04-12 14:01:50 +0200 |
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committer | Adrian Kummerlaender | 2017-04-12 14:01:50 +0200 |
commit | 45e4fe29a237ae5cda4147c803046ff5f6793770 (patch) | |
tree | 01f62a915fe4ddfebfc2517e8234941be46f7adb /src/primitives.d | |
parent | 56f4704c1292e4941d27a9971f5652a27e755672 (diff) | |
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Modularize implementation
Diffstat (limited to 'src/primitives.d')
-rw-r--r-- | src/primitives.d | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/primitives.d b/src/primitives.d new file mode 100644 index 0000000..0be6836 --- /dev/null +++ b/src/primitives.d @@ -0,0 +1,69 @@ +module src.primitives; + +import std.stdio; + +import src.stack; +import src.definition; + +int[string] variables; + +bool evaluate(string word) { + switch ( word ) { + case "ยง": + src.definition.start; + return true; + case "$": + string name = stack.pop.get!string; + int value = stack.pop.get!int; + + variables[name] = value; + return true; + case "@": + string name = stack.pop.get!string; + + if ( name in variables ) { + stack.push(variables[name]); + } + return true; + case "+": + int b = stack.pop.get!int; + int a = stack.pop.get!int; + + stack.push(a + b); + return true; + case "*": + int b = stack.pop.get!int; + int a = stack.pop.get!int; + + stack.push(a * b); + return true; + case "/": + 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); + } + return true; + case "%": + 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); + } + return true; + case ".": + stack.pop; + return true; + case "'": + writeln(stack.top); + return true; + default: + return false; + } +} |