Add formatting css and reorganize
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21 changed files with 308 additions and 199 deletions
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@ -2,7 +2,7 @@
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Nimrod supports three different types of variables, `let`, `var`, and `const`. As with most things, multiple variables can be declared in the same section.
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~~~ nimrod
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``` nimrod
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proc getAlphabet(): string =
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result = ""
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for letter in 'a'..'z':
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@ -23,22 +23,22 @@ b.inc # This is also fine.
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c.add "bar" # This will result in an error.
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d.inc # As will this.
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~~~
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```
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~~~
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``` console
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$ nimrod c --verbosity:2 ./assignment.nim
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a20.nim(19, 0) Error: for a 'var' type a variable needs to be passed
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c.add "bar" # This will result in an error.
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^
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~~~
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```
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Without `--verbosity:2` only the error will be shown.
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A `const` variable's value will be evaluated at compile-time, so if you inspect the C sources, you'll see the following line:
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~~~ C
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``` c
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STRING_LITERAL(TMP129, "abcdefghijklmnopqrstuvwxyz", 26);
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~~~
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```
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The limitation with this is that procedures which are evaluated at compile-time cannot interface with C because there is no compile-time foreign function interface at this time.
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The `result` variable is a special variable that serves as an implicit return variable. This is useful because in most cases, the control flow semantics of the `return` statement are unneeded. `result` is initialized with the default value for a given return type, so the following code starts as `0`, before being initialized to `number`:
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~~~ nimrod
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``` nimrod
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proc `**`(number, power: int): int =
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result = number
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for i in 1..power:
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result *= number
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~~~
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```
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A possible gotcha is declaring a variable called result and expecting it to have the same semantics.
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~~~ nimrod
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``` nimrod
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proc unexpected(): int =
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var result = 5
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result += 5
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echo unexpected() # Prints 0, not 10
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~~~
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```
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