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A static code analysis tool with a focus on code consistency and teaching.
Current section
Files
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Files
lib/credo/check/readability/semicolons.ex
defmodule Credo.Check.Readability.Semicolons do
use Credo.Check,
id: "EX3020",
base_priority: :high,
tags: [:formatter],
explanations: [
check: """
Don't use ; to separate statements and expressions.
Statements and expressions should be separated by lines.
# preferred
a = 1
b = 2
# NOT preferred
a = 1; b = 2
Like all `Readability` issues, this one is not a technical concern.
But you can improve the odds of others reading and liking your code by making
it easier to follow.
"""
]
@doc false
@impl true
def run(%SourceFile{} = source_file, params) do
ctx = Context.build(source_file, params, __MODULE__)
source_file
|> Credo.Code.to_tokens()
|> collect_issues([], ctx)
end
defp collect_issues([], acc, _ctx), do: acc
defp collect_issues([{:";", {line_no, column1, _}} | rest], acc, ctx) do
acc = [issue_for(ctx, line_no, column1) | acc]
collect_issues(rest, acc, ctx)
end
defp collect_issues([_ | rest], acc, ctx), do: collect_issues(rest, acc, ctx)
defp issue_for(ctx, line_no, column) do
format_issue(
ctx,
message: "Don't use `;` to separate statements and expressions.",
line_no: line_no,
column: column,
trigger: ";"
)
end
end