15376299223

Committed 01 Jun 2025 02:46PM UTC coverage: 74.019% (+1.1%) from 72.943%

Build # 15376299223

Build Type

Pull #276

github

Committed by

web-flow

Commit Message

Merge 1b780bbfa into 458977aea

Pull Request Pull Request #276: GH-275: begin code formatting algorithm

Run Details

180 of 182 new or added lines in 2 files covered. (98.9%)

3661 of 4946 relevant lines covered (74.02%)

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96.23

/lambda_compiler/src/format.rs

use crate::ast::{Expression, LambdaParameter};

fn format_string_literal<W>(content: &str, writer: &mut W) -> std::fmt::Result
where
    W: std::fmt::Write,
{
    write!(writer, "\"")?;
    for character in content.chars() {
        match character {
            '"' | '\'' | '\\' => write!(writer, "\\{character}")?,
            '\n' => write!(writer, "\\n")?,
            '\r' => write!(writer, "\\r")?,
            '\t' => write!(writer, "\\t")?,
            _ => write!(writer, "{character}")?,
        }
    }
    write!(writer, "\"")
}

fn format_apply<W>(
    callee: &Expression,
    arguments: &[Expression],
    writer: &mut W,
) -> std::fmt::Result
where
    W: std::fmt::Write,
{
    format_expression(callee, writer)?;
    write!(writer, "(")?;
    for argument in arguments.iter() {
        format_expression(argument, writer)?;
        write!(writer, ", ")?;
    }
    write!(writer, ")")
}

fn format_lambda<W>(
    parameters: &[LambdaParameter],
    body: &Expression,
    writer: &mut W,
) -> std::fmt::Result
where
    W: std::fmt::Write,
{
    write!(writer, "(")?;
    for parameter in parameters.iter() {
        write!(writer, "{}", parameter.name.key)?;
        if let Some(type_annotation) = &parameter.type_annotation {
            write!(writer, ": ")?;
            format_expression(type_annotation, writer)?;
        }
        write!(writer, ", ")?;
    }
    write!(writer, ") => ")?;
    format_expression(body, writer)
}

pub fn format_expression<W>(expression: &Expression, writer: &mut W) -> std::fmt::Result
where
    W: std::fmt::Write,
{
    match expression {
        Expression::Identifier(name, _source_location) => write!(writer, "{}", &name.key),
        Expression::StringLiteral(content) => format_string_literal(content, writer),
        Expression::Apply { callee, arguments } => format_apply(callee, arguments, writer),
        Expression::Lambda { parameters, body } => format_lambda(parameters, body, writer),
        Expression::ConstructTree(children) => {
            write!(writer, "[")?;
            for child in children.iter() {
                format_expression(child, writer)?;
                write!(writer, ", ")?;
            }
            write!(writer, "]")
        }
        Expression::Braces(expression) => {
            write!(writer, "{{")?;
            format_expression(expression, writer)?;
            write!(writer, "}}")
        }
        Expression::Let {
            name,
            location: _,
            value,
            body,
        } => {
            write!(writer, "let {} = ", &name.key)?;
            format_expression(value, writer)?;
            writeln!(writer)?;
            format_expression(body, writer)
        }
    }
}

1	use crate::ast::{Expression, LambdaParameter};
2
3	fn format_string_literal<W>(content: &str, writer: &mut W) -> std::fmt::Result	6✔
4	where
5	W: std::fmt::Write,
6	{
7	write!(writer, "\"")?;	6✔
8	for character in content.chars() {	29✔
9	match character {	23✔
10	'"' \| '\'' \| '\\' => write!(writer, "\\{character}")?,	3✔
11	'\n' => write!(writer, "\\n")?,	1✔
12	'\r' => write!(writer, "\\r")?,	1✔
13	'\t' => write!(writer, "\\t")?,	1✔
14	_ => write!(writer, "{character}")?,	17✔
15	}
16	}
17	write!(writer, "\"")	6✔
18	}
19
20	fn format_apply<W>(	3✔
21	callee: &Expression,
22	arguments: &[Expression],
23	writer: &mut W,
24	) -> std::fmt::Result
25	where
26	W: std::fmt::Write,
27	{
28	format_expression(callee, writer)?;	3✔
29	write!(writer, "(")?;	3✔
30	for argument in arguments.iter() {	6✔
31	format_expression(argument, writer)?;	3✔
32	write!(writer, ", ")?;	3✔
33	}
34	write!(writer, ")")	3✔
35	}
36
37	fn format_lambda<W>(	4✔
38	parameters: &[LambdaParameter],
39	body: &Expression,
40	writer: &mut W,
41	) -> std::fmt::Result
42	where
43	W: std::fmt::Write,
44	{
45	write!(writer, "(")?;	4✔
46	for parameter in parameters.iter() {	8✔
47	write!(writer, "{}", parameter.name.key)?;	4✔
48	if let Some(type_annotation) = &parameter.type_annotation {	5✔
NEW 49	write!(writer, ": ")?;	×
50	format_expression(type_annotation, writer)?;	1✔
51	}
52	write!(writer, ", ")?;	4✔
53	}
54	write!(writer, ") => ")?;	4✔
55	format_expression(body, writer)	4✔
56	}
57
58	pub fn format_expression<W>(expression: &Expression, writer: &mut W) -> std::fmt::Result	33✔
59	where
60	W: std::fmt::Write,
61	{
62	match expression {	33✔
63	Expression::Identifier(name, _source_location) => write!(writer, "{}", &name.key),	15✔
64	Expression::StringLiteral(content) => format_string_literal(content, writer),	6✔
65	Expression::Apply { callee, arguments } => format_apply(callee, arguments, writer),	3✔
66	Expression::Lambda { parameters, body } => format_lambda(parameters, body, writer),	4✔
67	Expression::ConstructTree(children) => {	3✔
68	write!(writer, "[")?;	3✔
69	for child in children.iter() {	6✔
70	format_expression(child, writer)?;	3✔
71	write!(writer, ", ")?;	3✔
72	}
73	write!(writer, "]")	3✔
74	}
75	Expression::Braces(expression) => {	1✔
76	write!(writer, "{{")?;	1✔
77	format_expression(expression, writer)?;	1✔
78	write!(writer, "}}")	1✔
79	}
NEW 80	Expression::Let {	×
81	name,	1✔
82	location: _,	1✔
83	value,	1✔
84	body,	1✔
85	} => {	1✔
86	write!(writer, "let {} = ", &name.key)?;	1✔
87	format_expression(value, writer)?;	1✔
88	writeln!(writer)?;	1✔
89	format_expression(body, writer)	1✔
90	}
91	}
92	}

TyRoXx / NonlocalityOS / 15376299223

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