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updated site + added docs/builtins.md + statements can end with ',' to differentiate '1, -2' from '1 - 2' == '-1'.
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mark
@@ -9,7 +9,7 @@
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<section class="container">
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<section class="container_left2 code-border">
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<pre><code class="mers-code-snippet">
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fn get_number_input(question string) {<br> println(question)<br> input = read_line()<br> // try to parse to an int, then a float.<br> in = match input {<br> input.parse_int() input<br> input.parse_float() input<br> }<br> // 'in' has type int/float/[] because of the match statement<br> switch! in {<br> int/float in<br> // replace [] with an appropriate error before returning<br> [] Err: "input was not a number."<br> }<br> // return type is int/float/Err(string)<br>}<br><br>answer = get_number_input("What is your favorite number?")<br><br>answer.debug() // type: int/float/Err(string)<br>// switch can be used to branch based on a variables type.<br>// switch! indicates that every possible type must be handled.<br>switch! answer {<br> int {<br> println("Entered an integer")<br> answer.debug() // type: int<br> }<br> float {<br> println("Entered a decimal number")<br> answer.debug() // type: float<br> }<br> Err(string) println("Input was not a number!")<br>}<br><br>// wait one second<br>sleep(1)<br><br><br>// function that returns an anonymous function (function object).<br>// anonymous functions can be used as iterators in for-loops.<br>fn square_numbers() {<br> i = 0<br> () {<br> i = i + 1<br> i * i<br> }<br>}<br><br>for num square_numbers() {<br> println(num.to_string())<br> // once num is greater than 60, the loop stops.<br> num.gt(50)<br>}<br></code></pre>
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fn get_number_input(question string) {<br> println(question)<br> input := read_line()<br> // try to parse to an int, then a float.<br> in := match input {<br> input.parse_int() input<br> input.parse_float() input<br> }<br> // 'in' has type int/float/[] because of the match statement<br> switch! in {<br> int/float in<br> // replace [] with an appropriate error before returning<br> [] Err: "input was not a number."<br> }<br> // return type is int/float/Err(string)<br>}<br><br>answer := get_number_input("What is your favorite number?")<br><br>answer.debug() // type: int/float/Err(string)<br>// switch can be used to branch based on a variables type.<br>// switch! indicates that every possible type must be handled.<br>switch! answer {<br> int {<br> println("Entered an integer")<br> answer.debug() // type: int<br> }<br> float {<br> println("Entered a decimal number")<br> answer.debug() // type: float<br> }<br> Err(string) println("Input was not a number!")<br>}<br><br>// wait one second<br>sleep(1)<br><br><br>// function that returns an anonymous function (function object).<br>// anonymous functions can be used as iterators in for-loops.<br>fn square_numbers() {<br> i := 0<br> () {<br> &i = i + 1<br> i * i<br> }<br>}<br><br>for num square_numbers() {<br> println(num.to_string())<br> // once num is greater than 60, the loop stops.<br> num.gt(50)<br>}<br></code></pre>
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</section>
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<section class="container_right">
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<image
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@@ -42,7 +42,7 @@ it is by using one of the assume*() functions (similar to unwrap()s).
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<pre class="container2_left"><code>
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<!DOCTYPE html><br># This document will be processed by build.mers.<br># Lines starting with hashtags are comments and will be ignored.<br># Lines starting with dollar-signs insert special text.<br># To escape this, put a space before the hashtag or dollar sign.<br><head><br> <meta charset=“UTF-8”><br> <link rel="stylesheet" href="external.css"><br> <title>Mark :: mers</title><br></head><br><body><br> <h1>Mers</h1><br> <section class="container"><br> <section class="container_left2 code-border"><br> <pre><code class="mers-code-snippet"><br>$welcome_script<br> </code></pre><br> </section><br> <section class="container_right"><br> <image<br> alt="some picture related to mers (todo)"<br> src="data:image/jpg;base64,/9j/4AAQSkZJRgABAQEASABIAAD/2wBDAP//////<br> width="100%" height="100%"<br> ><br> <h3>Mers types</h3><br> <div><br> Mers uses a multiple-types system.<br> It keeps track of which types a variable could have<br> and constructs a type with that information.<br> <br><br> For example, <code>int/float</code> can represent a number - int or<br> Optional types can be <code>[]/[t]</code> - either nothing or one v<br> Mers doesn't have null, it just has the empty tuple <code>[]</code><br> </div><br> <h3>No exceptions, no crashes</h3><br> <div><br> Errors in mers are passed as values.<br> Because of the type system, you are forced to handle them explicitl<br> Mers will not crash in unexpected places, because the only way to c<br> it is by using one of the assume*() functions (similar to unwrap()s<br> </div><br> </section><br> </section><br> <hr><br> <h3>HTML preprocessor to help build this document written in mers:</h3><br> <section class="container"><br> <pre class="container2_left"><code><br>$index.html<br> </code></pre><br> <pre class="container2_right"><code class="mers-code-snippet"><br>$build_script<br> </code></pre><br> </section><br></body><br><br></code></pre>
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<pre class="container2_right"><code class="mers-code-snippet">
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#!/usr/bin/env mers<br><br>// helper functions<br><br>fn read_string(path string) {<br> bytes_to_string(fs_read(path).assume_no_enum()).assume_no_enum()<br>}<br>fn code_to_html(code string code_width_limit_chars int) {<br> out = ""<br> for line code.regex(".*").assume_no_enum() {<br> if code_width_limit_chars.gtoe(0).and(line.len().gt(code_width_limit_chars)) {<br> line = line.substring(0 code_width_limit_chars)<br> }<br> line = line<br> .replace("&" "&amp;")<br> .replace("<" "&lt;")<br> .replace(">" "&gt;")<br> out = out.add(line.add("<br>"))<br> }<br> out<br>}<br><br>// data<br><br>index = read_string("index.html")<br><br>index_html = index.code_to_html(75)<br>build_script = read_string("build.mers").code_to_html(-1)<br>welcome_script = read_string("welcome.mers").code_to_html(-1)<br><br>// process index.html<br><br>out = ""<br>for line index.regex("\\S*.*").assume_no_enum() {<br> if line.starts_with("#") {<br> // comment, ignore<br> } else if line.starts_with("$") {<br> if line == "$welcome_script" {<br> out = out + welcome_script<br> } else if line == "$build_script" {<br> out = out + build_script<br> } else if line == "$index.html" {<br> out = out + index_html<br> }<br> } else {<br> // remove spaces<br> loop {<br> if line.starts_with(" ") {<br> line = line.substring(1)<br> } else {<br> true // break<br> }<br> }<br> out = out + line + "\n"<br> }<br>}<br>fs_write("../index.html" string_to_bytes(out)).assume_no_enum()<br><br></code></pre>
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#!/usr/bin/env mers<br><br>// helper functions<br><br>fn read_string(path string) {<br> bytes_to_string(fs_read(path).assume_no_enum()).assume_no_enum()<br>}<br>fn code_to_html(code string code_width_limit_chars int) {<br> out := ""<br> for line code.regex(".*").assume_no_enum() {<br> if code_width_limit_chars.gtoe(0).and(line.len().gt(code_width_limit_chars)) {<br> &line = line.substring(0 code_width_limit_chars)<br> }<br> &line = line<br> .replace("&" "&amp;")<br> .replace("<" "&lt;")<br> .replace(">" "&gt;")<br> &out = out.add(line.add("<br>"))<br> }<br> out<br>}<br><br>// data<br><br>index := read_string("index.html")<br><br>index_html := index.code_to_html(75)<br>build_script := read_string("build.mers").code_to_html(-1)<br>welcome_script := read_string("welcome.mers").code_to_html(-1)<br><br>// process index.html<br><br>out := ""<br>for line index.regex("\\S*.*").assume_no_enum() {<br> if line.starts_with("#") {<br> // comment, ignore<br> } else if line.starts_with("$") {<br> if line == "$welcome_script" {<br> &out = out + welcome_script<br> } else if line == "$build_script" {<br> &out = out + build_script<br> } else if line == "$index.html" {<br> &out = out + index_html<br> }<br> } else {<br> // remove spaces<br> loop {<br> if line.starts_with(" ") {<br> &line = line.substring(1)<br> } else {<br> true // break<br> }<br> }<br> &out = out + line + "\n"<br> }<br>}<br>fs_write("../index.html" string_to_bytes(out)).assume_no_enum()<br><br></code></pre>
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</section>
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</body>
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