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https://github.com/martinvonz/jj.git
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templater: unify variants of argument count error, embed function name
This is similar to the structure of RevsetParseError. It's unlikely we would need to discriminate parsing errors, so let's avoid wasting time on naming things.
This commit is contained in:
Yuya Nishihara
parent
61dd6ab8df
commit
f6b0b7788e
2 changed files with 37 additions and 62 deletions
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@ -14,7 +14,6 @@
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use std::collections::HashMap;
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use std::num::ParseIntError;
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use std::ops::{RangeFrom, RangeInclusive};
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use std::{error, fmt};
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use itertools::Itertools as _;
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@ -48,13 +47,8 @@ pub enum TemplateParseErrorKind {
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NoSuchFunction(String),
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#[error(r#"Method "{name}" doesn't exist for type "{type_name}""#)]
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NoSuchMethod { type_name: String, name: String },
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// TODO: clean up argument error variants
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#[error("Expected {0} arguments")]
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InvalidArgumentCountExact(usize),
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#[error("Expected {} to {} arguments", .0.start(), .0.end())]
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InvalidArgumentCountRange(RangeInclusive<usize>),
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#[error("Expected at least {} arguments", .0.start)]
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InvalidArgumentCountRangeFrom(RangeFrom<usize>),
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#[error(r#"Function "{name}": {message}"#)]
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InvalidArguments { name: String, message: String },
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#[error(r#"Expected argument of type "{0}""#)]
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InvalidArgumentType(String),
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#[error("Invalid time format")]
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@ -121,30 +115,13 @@ impl TemplateParseError {
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)
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}
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pub fn invalid_argument_count_exact(count: usize, span: pest::Span<'_>) -> Self {
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pub fn invalid_arguments(function: &FunctionCallNode, message: impl Into<String>) -> Self {
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TemplateParseError::with_span(
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TemplateParseErrorKind::InvalidArgumentCountExact(count),
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span,
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)
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}
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pub fn invalid_argument_count_range(
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count: RangeInclusive<usize>,
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span: pest::Span<'_>,
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) -> Self {
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TemplateParseError::with_span(
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TemplateParseErrorKind::InvalidArgumentCountRange(count),
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span,
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)
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}
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pub fn invalid_argument_count_range_from(
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count: RangeFrom<usize>,
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span: pest::Span<'_>,
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) -> Self {
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TemplateParseError::with_span(
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TemplateParseErrorKind::InvalidArgumentCountRangeFrom(count),
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span,
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TemplateParseErrorKind::InvalidArguments {
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name: function.name.to_owned(),
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message: message.into(),
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},
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function.args_span,
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)
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}
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@ -541,9 +518,9 @@ pub fn expand_aliases<'i>(
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ExpressionKind::FunctionCall(function) => {
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if let Some((id, params, defn)) = state.aliases_map.get_function(function.name) {
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if function.args.len() != params.len() {
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return Err(TemplateParseError::invalid_argument_count_exact(
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params.len(),
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function.args_span,
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return Err(TemplateParseError::invalid_arguments(
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&function,
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format!("Expected {} arguments", params.len()),
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));
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}
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// Resolve arguments in the current scope, and pass them in to the alias
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@ -596,9 +573,9 @@ pub fn expect_no_arguments(function: &FunctionCallNode) -> TemplateParseResult<(
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if function.args.is_empty() {
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Ok(())
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} else {
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Err(TemplateParseError::invalid_argument_count_exact(
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0,
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function.args_span,
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Err(TemplateParseError::invalid_arguments(
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function,
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"Expected 0 arguments",
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))
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}
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}
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@ -607,11 +584,9 @@ pub fn expect_no_arguments(function: &FunctionCallNode) -> TemplateParseResult<(
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pub fn expect_exact_arguments<'a, 'i, const N: usize>(
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function: &'a FunctionCallNode<'i>,
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) -> TemplateParseResult<&'a [ExpressionNode<'i>; N]> {
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function
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.args
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.as_slice()
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.try_into()
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.map_err(|_| TemplateParseError::invalid_argument_count_exact(N, function.args_span))
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function.args.as_slice().try_into().map_err(|_| {
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TemplateParseError::invalid_arguments(function, format!("Expected {N} arguments"))
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})
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}
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/// Extracts N required arguments and remainders.
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@ -622,9 +597,9 @@ pub fn expect_some_arguments<'a, 'i, const N: usize>(
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let (required, rest) = function.args.split_at(N);
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Ok((required.try_into().unwrap(), rest))
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} else {
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Err(TemplateParseError::invalid_argument_count_range_from(
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N..,
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function.args_span,
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Err(TemplateParseError::invalid_arguments(
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function,
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format!("Expected at least {N} arguments"),
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))
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}
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}
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@ -643,9 +618,9 @@ pub fn expect_arguments<'a, 'i, const N: usize, const M: usize>(
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optional.resize(M, None);
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Ok((required.try_into().unwrap(), optional.try_into().unwrap()))
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} else {
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Err(TemplateParseError::invalid_argument_count_range(
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count_range,
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function.args_span,
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Err(TemplateParseError::invalid_arguments(
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function,
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format!("Expected {min} to {max} arguments", min = N, max = N + M),
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))
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}
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}
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@ -997,20 +972,20 @@ mod tests {
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);
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// Invalid number of arguments.
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assert_eq!(
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assert_matches!(
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with_aliases([("F()", "x")]).parse("F(a)").unwrap_err().kind,
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TemplateParseErrorKind::InvalidArgumentCountExact(0),
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TemplateParseErrorKind::InvalidArguments { .. }
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);
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assert_eq!(
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assert_matches!(
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with_aliases([("F(x)", "x")]).parse("F()").unwrap_err().kind,
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TemplateParseErrorKind::InvalidArgumentCountExact(1),
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TemplateParseErrorKind::InvalidArguments { .. }
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);
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assert_eq!(
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assert_matches!(
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with_aliases([("F(x,y)", "x ++ y")])
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.parse("F(a,b,c)")
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.unwrap_err()
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.kind,
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TemplateParseErrorKind::InvalidArgumentCountExact(2),
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TemplateParseErrorKind::InvalidArguments { .. }
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);
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// Infinite recursion, where the top-level error isn't of RecursiveAlias kind.
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@ -180,7 +180,7 @@ fn test_templater_parse_error() {
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1 | description.contains()
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| ^
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= Expected 1 arguments
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= Function "contains": Expected 1 arguments
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"###);
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insta::assert_snapshot!(render_err(r#"description.first_line("foo")"#), @r###"
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@ -189,7 +189,7 @@ fn test_templater_parse_error() {
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1 | description.first_line("foo")
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| ^---^
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= Expected 0 arguments
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= Function "first_line": Expected 0 arguments
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"###);
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insta::assert_snapshot!(render_err(r#"label()"#), @r###"
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@ -198,7 +198,7 @@ fn test_templater_parse_error() {
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1 | label()
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| ^
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= Expected 2 arguments
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= Function "label": Expected 2 arguments
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"###);
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insta::assert_snapshot!(render_err(r#"label("foo", "bar", "baz")"#), @r###"
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Error: Failed to parse template: --> 1:7
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@ -206,7 +206,7 @@ fn test_templater_parse_error() {
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1 | label("foo", "bar", "baz")
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| ^-----------------^
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= Expected 2 arguments
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= Function "label": Expected 2 arguments
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"###);
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insta::assert_snapshot!(render_err(r#"if()"#), @r###"
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@ -215,7 +215,7 @@ fn test_templater_parse_error() {
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1 | if()
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| ^
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= Expected 2 to 3 arguments
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= Function "if": Expected 2 to 3 arguments
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"###);
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insta::assert_snapshot!(render_err(r#"if("foo", "bar", "baz", "quux")"#), @r###"
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Error: Failed to parse template: --> 1:4
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@ -223,7 +223,7 @@ fn test_templater_parse_error() {
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1 | if("foo", "bar", "baz", "quux")
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| ^-------------------------^
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= Expected 2 to 3 arguments
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= Function "if": Expected 2 to 3 arguments
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"###);
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insta::assert_snapshot!(render_err(r#"if(label("foo", "bar"), "baz")"#), @r###"
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@ -693,7 +693,7 @@ fn test_templater_alias() {
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1 | identity()
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| ^
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= Expected 1 arguments
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= Function "identity": Expected 1 arguments
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"###);
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insta::assert_snapshot!(render_err("identity(commit_id, commit_id)"), @r###"
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Error: Failed to parse template: --> 1:10
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@ -701,7 +701,7 @@ fn test_templater_alias() {
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1 | identity(commit_id, commit_id)
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| ^------------------^
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= Expected 1 arguments
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= Function "identity": Expected 1 arguments
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"###);
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insta::assert_snapshot!(render_err(r#"coalesce(label("x", "not boolean"), "")"#), @r###"
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