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ac303a707e
Co-authored-by: NagyZoltanPeter <113987313+NagyZoltanPeter@users.noreply.github.com> Co-authored-by: Gabriel Cruz <8129788+gmelodie@users.noreply.github.com>
46 lines
1.6 KiB
Nim
46 lines
1.6 KiB
Nim
## Identifier-casing helpers shared by the codegen modules and the FFI macro.
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## All three operate on `Rune` via `std/unicode` so non-ASCII identifiers
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## (rare in FFI symbols but possible in field names) round-trip correctly.
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import std/[strutils, unicode]
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proc toLower*(s: string): string =
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## Unicode-aware lowercase for an entire string. Wraps `std/unicode`'s
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## per-Rune `toLower` so callers don't have to iterate manually.
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var buf = ""
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for r in runes(s):
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buf.add($r.toLower())
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return buf
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proc camelToSnakeCase*(s: string): string =
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## Converts camelCase to snake_case. Inserts `_` before each uppercase rune
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## that's not the first character and lowercases everything.
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## e.g. "delayMs" → "delay_ms", "timerName" → "timer_name"
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var snake = ""
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var first = true
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for r in runes(s):
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if r.isUpper() and not first:
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snake.add('_')
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snake.add($r.toLower())
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first = false
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return snake
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proc capitalizeFirstLetter*(s: string): string =
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## Returns `s` with its first rune uppercased; the rest is left unchanged.
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## e.g. "abc" → "Abc", "" → "", "Abc" → "Abc"
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if s.len == 0:
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return s
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var runesSeq = toRunes(s)
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runesSeq[0] = runesSeq[0].toUpper()
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return $runesSeq
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proc snakeToPascalCase*(s: string): string =
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## Converts snake_case identifiers to PascalCase: split on `_`, uppercase
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## the first rune of each part, concatenate.
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## e.g. "testlib_create" → "TestlibCreate", "hello_world" → "HelloWorld"
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let parts = s.split('_')
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var pascal = ""
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for p in parts:
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pascal.add capitalizeFirstLetter(p)
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return pascal
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