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Monkey Programming Language

A dynamic toy programming language implemented twice from scratch in Rust (./src/monkey-rs) and Go (./src/monkey-go) based on the book Writing an Interpreter in Go by Thorsten Ball

Examples

Hello World

puts("hello world");//> hello world

Variables and Expressions

leta=1;puts(a+1);//> 2letb=6;puts(a+b);//> 8letb=" foo";puts(4+a+b);//> 15 foo

Data types

letstr="this is a string";puts(len(str));//> 16letarr=["this","is","an","array",1,true];puts(len(arr));//> 6lethsh={"this": "is","a": "hash",true: false,1: 101};puts(hsh["this"]+hsh["a"])//> ishash

Functions

letfactorial=fn(n){if(n<=1){return1;}returnn*factorial(n-1);}puts(factorial(8));//> 40320letfibonacci=fn(n){if(n<=1){return1;}returnfibonacci(n-2)+fibonacci(n-1);}puts(fibonacci(25))//> 121393

Built-in Functions

letarr=[0,1,2,3,5,6,7,8,9]puts(len(arr))//> 10puts(first(arr))//> 0puts(last(arr))//> 9puts(rest(arr))//> [1, 2, 3, 5, 6, 7, 8, 9]puts(push(arr,10))//> [0, 1, 2, 3, 5, 6, 7, 8, 9, 10]

Macro Expressions

quote(expression):

Returns expression as a raw AST object without evaluating (except for expressions inside unquote)

unquote(expression):

Can only be used inside quote argument

Evaluate expression or quoted AST object passed as argument

puts(quote(foobar+barfoo));//> QUOTE((foobar + barfoo))puts(quote(8+unquote(4+4)));//> QUOTE((8 + 8))letquotedInfixExpression=quote(4+4);puts(quote(unquote(4+4)+unquote(quotedInfixExpression)));//> QUOTE((8 + (4 + 4)))

Macro Functions

letunless=macro(condition,consequence,alternative){quote(if(!unquote(condition)){unquote(consequence);}else{unquote(alternative);});};unless(10>5,puts("not greater"),puts("greater"));//> greater

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Monkey programming language interpreters in Rust and Go

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Monkey Programming Language
A dynamic toy programming language implemented twice from scratch in Rust (./src/monkey-rs) and Go (./src/monkey-go) based on the book Writing an Interpreter in Go by Thorsten Ball
Examples
Hello World
puts("hello world");//> hello world
Variables and Expressions
leta=1;puts(a+1);//> 2letb=6;puts(a+b);//> 8letb=" foo";puts(4+a+b);//> 15 foo
Data types
letstr="this is a string";puts(len(str));//> 16letarr=["this","is","an","array",1,true];puts(len(arr));//> 6lethsh={"this": "is","a": "hash",true: false,1: 101};puts(hsh["this"]+hsh["a"])//> ishash
Functions
letfactorial=fn(n){if(n<=1){return1;}returnn*factorial(n-1);}puts(factorial(8));//> 40320letfibonacci=fn(n){if(n<=1){return1;}returnfibonacci(n-2)+fibonacci(n-1);}puts(fibonacci(25))//> 121393
Built-in Functions
letarr=[0,1,2,3,5,6,7,8,9]puts(len(arr))//> 10puts(first(arr))//> 0puts(last(arr))//> 9puts(rest(arr))//> [1, 2, 3, 5, 6, 7, 8, 9]puts(push(arr,10))//> [0, 1, 2, 3, 5, 6, 7, 8, 9, 10]
Macro Expressions
quote(expression):
Returns expression as a raw AST object without evaluating (except for expressions inside unquote)
unquote(expression):
Can only be used inside quote argument
Evaluate expression or quoted AST object passed as argument
puts(quote(foobar+barfoo));//> QUOTE((foobar + barfoo))puts(quote(8+unquote(4+4)));//> QUOTE((8 + 8))letquotedInfixExpression=quote(4+4);puts(quote(unquote(4+4)+unquote(quotedInfixExpression)));//> QUOTE((8 + (4 + 4)))
Macro Functions
letunless=macro(condition,consequence,alternative){quote(if(!unquote(condition)){unquote(consequence);}else{unquote(alternative);});};unless(10>5,puts("not greater"),puts("greater"));//> greater
About
Monkey programming language interpreters in Rust and Go
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Repository files navigation
Monkey Programming Language
A dynamic toy programming language implemented twice from scratch in Rust (./src/monkey-rs) and Go (./src/monkey-go) based on the book Writing an Interpreter in Go by Thorsten Ball
Examples
Hello World
puts("hello world");//> hello world
Variables and Expressions
leta=1;puts(a+1);//> 2letb=6;puts(a+b);//> 8letb=" foo";puts(4+a+b);//> 15 foo
Data types
letstr="this is a string";puts(len(str));//> 16letarr=["this","is","an","array",1,true];puts(len(arr));//> 6lethsh={"this": "is","a": "hash",true: false,1: 101};puts(hsh["this"]+hsh["a"])//> ishash
Functions
letfactorial=fn(n){if(n<=1){return1;}returnn*factorial(n-1);}puts(factorial(8));//> 40320letfibonacci=fn(n){if(n<=1){return1;}returnfibonacci(n-2)+fibonacci(n-1);}puts(fibonacci(25))//> 121393
Built-in Functions
letarr=[0,1,2,3,5,6,7,8,9]puts(len(arr))//> 10puts(first(arr))//> 0puts(last(arr))//> 9puts(rest(arr))//> [1, 2, 3, 5, 6, 7, 8, 9]puts(push(arr,10))//> [0, 1, 2, 3, 5, 6, 7, 8, 9, 10]
Macro Expressions
quote(expression):
Returns expression as a raw AST object without evaluating (except for expressions inside unquote)
unquote(expression):
Can only be used inside quote argument
Evaluate expression or quoted AST object passed as argument
puts(quote(foobar+barfoo));//> QUOTE((foobar + barfoo))puts(quote(8+unquote(4+4)));//> QUOTE((8 + 8))letquotedInfixExpression=quote(4+4);puts(quote(unquote(4+4)+unquote(quotedInfixExpression)));//> QUOTE((8 + (4 + 4)))
Macro Functions
letunless=macro(condition,consequence,alternative){quote(if(!unquote(condition)){unquote(consequence);}else{unquote(alternative);});};unless(10>5,puts("not greater"),puts("greater"));//> greater
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document.head.appendChild(style);
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Repository files navigation
Monkey Programming Language
A dynamic toy programming language implemented twice from scratch in Rust (./src/monkey-rs) and Go (./src/monkey-go) based on the book Writing an Interpreter in Go by Thorsten Ball
Examples
Hello World
puts("hello world");//> hello world
Variables and Expressions
leta=1;puts(a+1);//> 2letb=6;puts(a+b);//> 8letb=" foo";puts(4+a+b);//> 15 foo
Data types
letstr="this is a string";puts(len(str));//> 16letarr=["this","is","an","array",1,true];puts(len(arr));//> 6lethsh={"this": "is","a": "hash",true: false,1: 101};puts(hsh["this"]+hsh["a"])//> ishash
Functions
letfactorial=fn(n){if(n<=1){return1;}returnn*factorial(n-1);}puts(factorial(8));//> 40320letfibonacci=fn(n){if(n<=1){return1;}returnfibonacci(n-2)+fibonacci(n-1);}puts(fibonacci(25))//> 121393
Built-in Functions
letarr=[0,1,2,3,5,6,7,8,9]puts(len(arr))//> 10puts(first(arr))//> 0puts(last(arr))//> 9puts(rest(arr))//> [1, 2, 3, 5, 6, 7, 8, 9]puts(push(arr,10))//> [0, 1, 2, 3, 5, 6, 7, 8, 9, 10]
Macro Expressions
quote(expression):
Returns expression as a raw AST object without evaluating (except for expressions inside unquote)
unquote(expression):
Can only be used inside quote argument
Evaluate expression or quoted AST object passed as argument
puts(quote(foobar+barfoo));//> QUOTE((foobar + barfoo))puts(quote(8+unquote(4+4)));//> QUOTE((8 + 8))letquotedInfixExpression=quote(4+4);puts(quote(unquote(4+4)+unquote(quotedInfixExpression)));//> QUOTE((8 + (4 + 4)))
Macro Functions
letunless=macro(condition,consequence,alternative){quote(if(!unquote(condition)){unquote(consequence);}else{unquote(alternative);});};unless(10>5,puts("not greater"),puts("greater"));//> greater
About
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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Repository files navigation
Monkey Programming Language
A dynamic toy programming language implemented twice from scratch in Rust (./src/monkey-rs) and Go (./src/monkey-go) based on the book Writing an Interpreter in Go by Thorsten Ball
Examples
Hello World
puts("hello world");//> hello world
Variables and Expressions
leta=1;puts(a+1);//> 2letb=6;puts(a+b);//> 8letb=" foo";puts(4+a+b);//> 15 foo
Data types
letstr="this is a string";puts(len(str));//> 16letarr=["this","is","an","array",1,true];puts(len(arr));//> 6lethsh={"this": "is","a": "hash",true: false,1: 101};puts(hsh["this"]+hsh["a"])//> ishash
Functions
letfactorial=fn(n){if(n<=1){return1;}returnn*factorial(n-1);}puts(factorial(8));//> 40320letfibonacci=fn(n){if(n<=1){return1;}returnfibonacci(n-2)+fibonacci(n-1);}puts(fibonacci(25))//> 121393
Built-in Functions
letarr=[0,1,2,3,5,6,7,8,9]puts(len(arr))//> 10puts(first(arr))//> 0puts(last(arr))//> 9puts(rest(arr))//> [1, 2, 3, 5, 6, 7, 8, 9]puts(push(arr,10))//> [0, 1, 2, 3, 5, 6, 7, 8, 9, 10]
Macro Expressions
quote(expression):
Returns expression as a raw AST object without evaluating (except for expressions inside unquote)
unquote(expression):
Can only be used inside quote argument
Evaluate expression or quoted AST object passed as argument
puts(quote(foobar+barfoo));//> QUOTE((foobar + barfoo))puts(quote(8+unquote(4+4)));//> QUOTE((8 + 8))letquotedInfixExpression=quote(4+4);puts(quote(unquote(4+4)+unquote(quotedInfixExpression)));//> QUOTE((8 + (4 + 4)))
Macro Functions
letunless=macro(condition,consequence,alternative){quote(if(!unquote(condition)){unquote(consequence);}else{unquote(alternative);});};unless(10>5,puts("not greater"),puts("greater"));//> greater
About
Monkey programming language interpreters in Rust and Go
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var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
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setTimeout(tryTheater, 500);
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Repository files navigation
Monkey Programming Language
A dynamic toy programming language implemented twice from scratch in Rust (./src/monkey-rs) and Go (./src/monkey-go) based on the book Writing an Interpreter in Go by Thorsten Ball
Examples
Hello World
puts("hello world");//> hello world
Variables and Expressions
leta=1;puts(a+1);//> 2letb=6;puts(a+b);//> 8letb=" foo";puts(4+a+b);//> 15 foo
Data types
letstr="this is a string";puts(len(str));//> 16letarr=["this","is","an","array",1,true];puts(len(arr));//> 6lethsh={"this": "is","a": "hash",true: false,1: 101};puts(hsh["this"]+hsh["a"])//> ishash
Functions
letfactorial=fn(n){if(n<=1){return1;}returnn*factorial(n-1);}puts(factorial(8));//> 40320letfibonacci=fn(n){if(n<=1){return1;}returnfibonacci(n-2)+fibonacci(n-1);}puts(fibonacci(25))//> 121393
Built-in Functions
letarr=[0,1,2,3,5,6,7,8,9]puts(len(arr))//> 10puts(first(arr))//> 0puts(last(arr))//> 9puts(rest(arr))//> [1, 2, 3, 5, 6, 7, 8, 9]puts(push(arr,10))//> [0, 1, 2, 3, 5, 6, 7, 8, 9, 10]
Macro Expressions
quote(expression):
Returns expression as a raw AST object without evaluating (except for expressions inside unquote)
unquote(expression):
Can only be used inside quote argument
Evaluate expression or quoted AST object passed as argument
puts(quote(foobar+barfoo));//> QUOTE((foobar + barfoo))puts(quote(8+unquote(4+4)));//> QUOTE((8 + 8))letquotedInfixExpression=quote(4+4);puts(quote(unquote(4+4)+unquote(quotedInfixExpression)));//> QUOTE((8 + (4 + 4)))
Macro Functions
letunless=macro(condition,consequence,alternative){quote(if(!unquote(condition)){unquote(consequence);}else{unquote(alternative);});};unless(10>5,puts("not greater"),puts("greater"));//> greater
About
Monkey programming language interpreters in Rust and Go
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// Remove or un-stick sticky/fixed headers that block content
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function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
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Monkey Programming Language
A dynamic toy programming language implemented twice from scratch in Rust (./src/monkey-rs) and Go (./src/monkey-go) based on the book Writing an Interpreter in Go by Thorsten Ball
Examples
Hello World
puts("hello world");//> hello world
Variables and Expressions
leta=1;puts(a+1);//> 2letb=6;puts(a+b);//> 8letb=" foo";puts(4+a+b);//> 15 foo
Data types
letstr="this is a string";puts(len(str));//> 16letarr=["this","is","an","array",1,true];puts(len(arr));//> 6lethsh={"this": "is","a": "hash",true: false,1: 101};puts(hsh["this"]+hsh["a"])//> ishash
Functions
letfactorial=fn(n){if(n<=1){return1;}returnn*factorial(n-1);}puts(factorial(8));//> 40320letfibonacci=fn(n){if(n<=1){return1;}returnfibonacci(n-2)+fibonacci(n-1);}puts(fibonacci(25))//> 121393
Built-in Functions
letarr=[0,1,2,3,5,6,7,8,9]puts(len(arr))//> 10puts(first(arr))//> 0puts(last(arr))//> 9puts(rest(arr))//> [1, 2, 3, 5, 6, 7, 8, 9]puts(push(arr,10))//> [0, 1, 2, 3, 5, 6, 7, 8, 9, 10]
Macro Expressions
quote(expression):
Returns expression as a raw AST object without evaluating (except for expressions inside unquote)
unquote(expression):
Can only be used inside quote argument
Evaluate expression or quoted AST object passed as argument
puts(quote(foobar+barfoo));//> QUOTE((foobar + barfoo))puts(quote(8+unquote(4+4)));//> QUOTE((8 + 8))letquotedInfixExpression=quote(4+4);puts(quote(unquote(4+4)+unquote(quotedInfixExpression)));//> QUOTE((8 + (4 + 4)))
Macro Functions
letunless=macro(condition,consequence,alternative){quote(if(!unquote(condition)){unquote(consequence);}else{unquote(alternative);});};unless(10>5,puts("not greater"),puts("greater"));//> greater
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Monkey programming language interpreters in Rust and Go
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