daScript/examples/uncategorized/describe_function.das at master · WhyNot135/daScript · GitHub

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options gen2

// describe_function demo — pretty-prints a compiled function back to source.

// `describe_function` (daslib/ast) renders an AST Function node as daslang

// source. It always emits gen2 syntax: braces on every block, parens on

// control flow. We compile a small program at runtime, grab its module, and

// print each user function. Run standalone to see the round-tripped source:

// daslang.exe describe_function.das

// The same pattern works for `describe(expr)` on any Expression and

// `describe(prog)` on a whole Program.

require daslib/ast

require daslib/rtti

// The embedded source is gen2; its literal { } braces are escaped as \{ \} so

// they are not read as "{interpolation}" inside this string literal.

let SAMPLE_SRC = "

options gen2

def demo(x : int; var arr : array<int>) : int \{

var total = 0

for (i in range(x)) \{

if (i % 2 == 0) \{

total += i

\} else \{

total -= i

while (total > 100) \{

total -= 10

return total

[export]

def main() {

compile("demo_module", SAMPLE_SRC, CodeOfPolicies()) $(ok; prog; errors) {

if (!ok) {

print("compile failed:\n{errors}\n")

return

}

let thisMod = get_this_module(prog)

for_each_function(thisMod, "") $(var func) {

if (func.flags.builtIn || func.flags.generated || func.flags._lambda) {

return

}

print("// describe_function({func.name}) ->\n")

print("{describe_function(func)}\n")

}

daScript/examples/uncategorized/describe_function.das at master · WhyNot135/daScript · GitHub

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