fixed runtime stack missalignment
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README.md
62
README.md
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@ -1,35 +1,63 @@
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## Yard
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## Yard
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Yard is an funny programming language compiler and interpreter written in pure Rust.
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Yard is an funny programming language compiler and interpreter written in pure Rust.
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Its a functional language, having no concept of classes or inheritance. Types are static and must be known at compile time.
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Its a functional language, having no concept of classes or inheritance. Types are static and must be known at compile time.
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It contains features such as:
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1. a COMEFROM keyword (inverse goto)
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### Primitve data types
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2. a `don't` code block which never executes
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3. no if. only `unless`, an inverted version of if. Meaning a block gets executed if the expression is false
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The language has 4 primitive data types:
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4. three spaces start a single line comment
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5. many ways of making comments: `// comment`, `:REM: comment`, `# comment`, `-- comment --` cuz we can
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* `bool` a 1 byte boolean value which is either true or false. It can also be initalised with a random value at compile time iwht `maybe`
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* `int` a 8 byte two's complement signed integer with 64-bit of storage space
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* `rat` a 8 byte IEEE-754 double precision floating point value
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* `str` a dynamically sized immutable string wich for now can only be used with the concatonation operator `..`
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NOTE: no custom data types such as structs or classes are supported.
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### Keywords
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### Keywords
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<table><tbody><tr><td>Syntax</td><td>Description</td><td>Example</td></tr><tr><td>Unless</td><td>Inverted if. Only executes the following block if the expression is false</td><td><pre><code class="language-plaintext">unless 3 > 4 {
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<table><tbody><tr><td>Syntax</td><td>Description</td><td>Example</td></tr><tr><td>despite</td><td>Inverted if. Only executes the following block if the expression is false</td><td><pre><code class="language-plaintext">despite 3 > 4 {
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// code block
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// code block
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}</code></pre></td></tr><tr><td>Loop</td><td>While(true)-Loop. Loops forever until either yield, ret, break are used.<br>Loop take no boolean expression.</td><td><pre><code class="language-plaintext">loop {
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}</code></pre></td></tr><tr><td>loop</td><td>While(true)-Loop. Loops forever until either yield, ret, break are used.<br>Loop take no boolean expression.</td><td><pre><code class="language-plaintext">loop {
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// code block
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// code block
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}</code></pre></td></tr><tr><td>cont</td><td>Short form for “continue”. Jumps to the next iteration of a loop</td><td> </td></tr><tr><td>break</td><td>Exits a loop immediately</td><td> </td></tr><tr><td>yield</td><td>Returns from a function with an argument as return value</td><td><pre><code class="language-plaintext">foo() = int {
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}</code></pre></td></tr><tr><td>cont</td><td>Short form for “continue”. Jumps to the next iteration of a loop</td><td><pre><code class="language-plaintext">loop {
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cont;
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}</code></pre></td></tr><tr><td>break</td><td>Exits a loop immediately</td><td><pre><code class="language-plaintext">loop {
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break;
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}</code></pre></td></tr><tr><td>yield</td><td>Returns from a function with an argument as return value</td><td><pre><code class="language-plaintext">foo() = int {
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yield 4
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yield 4
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}</code></pre></td></tr><tr><td>ret</td><td>Short form for “return”. This keyword takes no argument and returns from a function. NOTE: if ret is used in a function with a return type, an error occurs.</td><td> </td></tr><tr><td>please</td><td>Decides on runtime wether a block should be executed or not.</td><td><pre><code class="language-plaintext">please {
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}</code></pre></td></tr><tr><td>ret</td><td>Short form for “return”. This keyword takes no argument and returns from a function. NOTE: if ret is used in a function with a return type, an error occurs.</td><td><pre><code class="language-plaintext">foo() {
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// code
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ret // exit function
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}</code></pre></td></tr></tbody></table>
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}</code></pre></td></tr><tr><td>please</td><td>Decides on runtime wether a block should be executed or not.</td><td><pre><code class="language-plaintext">please {
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// code
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}</code></pre></td></tr><tr><td>unless</td><td>Works like a while loop except inverted. it will only run if the condition is false.</td><td><pre><code class="language-plaintext">unless x > 5 {
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// code
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}</code></pre></td></tr><tr><td>goto</td><td>jumps to a specified label</td><td><pre><code class="language-plaintext">'label
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// code
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goto label;</code></pre></td></tr></tbody></table>
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### Example code
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### Example code
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```plaintext
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```plaintext
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foo(bar: int, abc:int) = int {
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-- compute the factorial
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bar + abc
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-- in a recursive and functional way
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fac(x:int) = int {
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despite x != 1 {
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yield 1;
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}
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yield fac(x - 1) * x
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}
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}
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main {
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number = rat 34 # this is a function without arguments and a braceless body
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foo(4, 5)
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// main function
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main = int {
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result = fac(number);
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println("The Factorial of " .. number .. " is: " .. result);
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yield 0;
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}
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}
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```
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```
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61
prog.vsasm
61
prog.vsasm
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@ -1,39 +1,46 @@
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section[text]
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section[text]
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0xa2b0391a480300b:
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push float 12
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extern builtin 0x80b0eba54530cdc3
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extern builtin 0xcd262c6e6c32473d
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0xc8c7a99bb88e156b:
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0xc8c7a99bb88e156b:
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push int 0x0
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call 0xa2b0391a480300b
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call 0x80b0eba54530cdc3
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call 0x967b65e0e8f1394
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store 0x0
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store 0x0
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load 0x0
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push string "The Factorial of "
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push int 0x9
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call 0xa2b0391a480300b
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cmp gt int
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push string " is: "
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jump-unless 0x19
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load 0x0
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push int 0x5
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cmp not-eq int
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jump-unless 0xf
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load 0x0
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push int 0x1
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add int
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store 0x0
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jump 0x2
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push string ""
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load 0x0
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load 0x0
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cat
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cat
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call 0xa451e518c3d4dbea
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cat
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call 0x396ceaf58c7ab783
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cat
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load 0x0
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call 0xe2e27e92bf406d33
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push int 0x0
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store 0x1
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load 0x1
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push int 0x9
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cmp gt int
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jump-unless 0x1b
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push string ""
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load 0x1
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cat
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call 0xe2e27e92bf406d33
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load 0x1
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push int 0x1
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push int 0x1
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add int
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add int
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store 0x0
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store 0x1
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jump 0x2
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jump 0xe
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jump 0x1b
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jump 0x2
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push int 0x0
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push int 0x0
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ret
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ret
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extern builtin 0x396ceaf58c7ab783
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extern builtin 0xe2e27e92bf406d33
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extern builtin 0x608aa48c89877fc5
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extern builtin 0x8207427514e5a880
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0x967b65e0e8f1394:
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0x967b65e0e8f1394:
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load 0x0
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load 0x0
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mul int
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mul int
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ret
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ret
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extern builtin 0xdcd0c37eed9c3ddf
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extern builtin 0x3e6a3810b5f0c581
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extern builtin 0x6d3c1164316ec324
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extern builtin 0x443bc4709cf7af32
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extern builtin 0xa451e518c3d4dbea
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extern builtin 0x23a9f04bf6903826
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r"|'([a-zA-Z0-9_]+)", // labels: 'example
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r"|'([a-zA-Z0-9_]+)", // labels: 'example
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r"|(goto\s+[a-zA-Z0-9_]+", // goto example
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r"|(goto\s+[a-zA-Z0-9_]+", // goto example
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r"|despite|until|loop|break|cont|ret|yield|please)", // keywords
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r"|despite|until|loop|break|cont|ret|yield|please)", // keywords
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r"|\W(int|rat|bool|str)\W", // raw data types
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r"|[\W\s]{0,1}(int|rat|bool|str)[\W\s]{0,1}", // raw data types
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r"|(true|false|ye|no|maybe)", // boolean values
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r"|(true|false|ye|no|maybe)", // boolean values
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r"|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9_]+))?\s*=[^=]", // assignment var:int=
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r"|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9_]+))?\s*=[^=]", // assignment var:int=
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r"|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9_]+))", // declaration var:int
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r"|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9_]+))", // declaration var:int
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if decl.name.as_ref().unwrap() == name {
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if decl.name.as_ref().unwrap() == name {
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code.push(Instr::Call(decl.uuid()));
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code.push(Instr::Call(decl.uuid()));
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ct.stacksize -= decl.args.as_ref().unwrap_or(&Vec::new()).len();
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if decl.results {
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if decl.results {
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ct.stacksize += 1;
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ct.stacksize += 1;
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ct.stacksize -= decl.args.as_ref().unwrap_or(&Vec::new()).len();
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}
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}
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}
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}
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}
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}
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58
test.erpn
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test.erpn
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extern function println
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extern function println
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extern function print
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extern function to_rat
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extern function println
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extern function to_int
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extern function parse_int
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extern function parse_rat
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fac:
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fac:
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Load Arg x
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Load Arg x
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Mul Int
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Mul Int
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Yield
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Yield
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number:
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Load Rat 12.0
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main:
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main:
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Call number
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Call to_int
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Call fac
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Store Int result
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Load String "The Factorial of "
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Call number
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Load String " is: "
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Load Var result
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Cat Str
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Cat Str
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Cat Str
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Call println
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Load Int 0
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Load Int 0
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Store Int x
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Store Int x
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Loop
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Loopstart
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Loopstart
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Load Var x
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Load Int 9
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Gt Int
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While
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Load String ""
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Load Var x
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Load Var x
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Load Int 9
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Cat Str
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Gt Int
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Call println
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While
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Load Var x
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Load Var x
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Load Int 1
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Load Int 5
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Add Int
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NotEq Int
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Store Int x
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Unless
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Load Var x
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Load Int 1
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Add Int
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Store Int x
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Continue
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Load String ""
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Load Var x
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Cat Str
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Call println
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Load Var x
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Load Int 1
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Add Int
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Store Int x
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Break
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Load Int 0
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Load Int 0
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Yield
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Yield
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32
test.yard
32
test.yard
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@feature(io)
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@feature(io, conv)
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@version(100)
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@version(100)
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@author(Sven Vogel)
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@author(Sven Vogel)
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// recursion!
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-- compute the factorial
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-- in a recursive and functional way
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fac(x:int) = int {
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fac(x:int) = int {
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despite x != 1 {
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despite x != 1 {
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yield 1;
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yield 1;
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yield fac(x - 1) * x
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yield fac(x - 1) * x
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}
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}
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main() = int {
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number = rat 12.0 # this is a function without arguments and a braceless body
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x = 0
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loop {
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until x > 9 {
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// main function
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despite x != 5 {
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main = int {
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x = x + 1
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cont
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}
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println(""..x);
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result = fac(to_int(number));
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x = x + 1
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}
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break
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println("The Factorial of " .. number() .. " is: " .. result);
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x:int = 0;
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until x > 9 {
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println("" .. x);
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x = x + 1
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}
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}
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println(""..fract(456.3928));
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yield 0;
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yield 0
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}
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}
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