diff options
| -rw-r--r-- | lib/pure/complex.nim | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/lib/pure/complex.nim b/lib/pure/complex.nim index 5304d0930..87b0670d1 100644 --- a/lib/pure/complex.nim +++ b/lib/pure/complex.nim @@ -36,7 +36,7 @@ runnableExamples: {.push checks: off, line_dir: off, stack_trace: off, debugger: off.} # the user does not want to trace a part of the standard library! -import std/math +import std/[math, strformat] type Complex*[T: SomeFloat] = object @@ -399,4 +399,39 @@ func `$`*(z: Complex): string = result = "(" & $z.re & ", " & $z.im & ")" +proc formatValueAsTuple(result: var string; value: Complex; specifier: string) = + ## Format implementation for `Complex` representing the value as a (real, imaginary) tuple. + result.add "(" + formatValue(result, value.re, specifier) + result.add ", " + formatValue(result, value.im, specifier) + result.add ")" + +proc formatValueAsComplexNumber(result: var string; value: Complex; specifier: string) = + ## Format implementation for `Complex` representing the value as a (RE+IMj) number + result.add "(" + formatValue(result, value.re, specifier) + if value.im >= 0 and not specifier.contains({'+', '-'}): + result.add "+" + formatValue(result, value.im, specifier) + result.add "j)" + +proc formatValue*(result: var string; value: Complex; specifier: string) = + ## Standard format implementation for `Complex`. It makes little + ## sense to call this directly, but it is required to exist + ## by the `&` macro. + ## For complex numbers, we add a specific 'j' specifier, which formats + ## the value as (A+Bj) like in mathematics. + if specifier.len == 0: + result.add $value + elif 'j' in specifier: + let specifier = if specifier.contains({'e', 'E', 'f', 'F', 'g', 'G'}): + specifier.replace("j") + else: + # 'The 'j' format defaults to 'g' + specifier.replace('j', 'g') + formatValueAsComplexNumber(result, value, specifier) + else: + formatValueAsTuple(result, value, specifier) + {.pop.} |