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Refactor parse_formatted_value

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harupy 2022-12-28 00:23:25 +09:00
parent c21d0d9283
commit 9aed9143fe
1 changed files with 10 additions and 13 deletions
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23
parser/src/fstring.rs
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@ -26,7 +26,7 @@ impl FStringParser {
mut chars: iter::Peekable<str::Chars<'a>>, mut chars: iter::Peekable<str::Chars<'a>>,
nested: u8, nested: u8,
) -> Result<(Vec<Expr>, iter::Peekable<str::Chars<'a>>), FStringErrorType> { ) -> Result<(Vec<Expr>, iter::Peekable<str::Chars<'a>>), FStringErrorType> {
let mut expression = String::from("{"); let mut expression = String::new();
let mut spec = None; let mut spec = None;
let mut delims = Vec::new(); let mut delims = Vec::new();
let mut conversion = ConversionFlag::None; let mut conversion = ConversionFlag::None;
@ -67,14 +67,14 @@ impl FStringParser {
Some('a') => ConversionFlag::Ascii, Some('a') => ConversionFlag::Ascii,
Some('r') => ConversionFlag::Repr, Some('r') => ConversionFlag::Repr,
Some(_) => { Some(_) => {
return Err(if expression[1..].trim().is_empty() { return Err(if expression.trim().is_empty() {
EmptyExpression EmptyExpression
} else { } else {
InvalidConversionFlag InvalidConversionFlag
}); });
} }
None => { None => {
return Err(if expression[1..].trim().is_empty() { return Err(if expression.trim().is_empty() {
EmptyExpression EmptyExpression
} else { } else {
UnclosedLbrace UnclosedLbrace
@ -84,14 +84,14 @@ impl FStringParser {
if let Some(&peek) = chars.peek() { if let Some(&peek) = chars.peek() {
if peek != '}' && peek != ':' { if peek != '}' && peek != ':' {
return Err(if expression[1..].trim().is_empty() { return Err(if expression.trim().is_empty() {
EmptyExpression EmptyExpression
} else { } else {
UnclosedLbrace UnclosedLbrace
}); });
} }
} else { } else {
return Err(if expression[1..].trim().is_empty() { return Err(if expression.trim().is_empty() {
EmptyExpression EmptyExpression
} else { } else {
UnclosedLbrace UnclosedLbrace
@ -156,15 +156,14 @@ impl FStringParser {
} }
} }
'}' => { '}' => {
if expression[1..].trim().is_empty() { if expression.trim().is_empty() {
return Err(EmptyExpression); return Err(EmptyExpression);
} }
expression.push(ch);
let ret = if !self_documenting { let ret = if !self_documenting {
vec![self.expr(ExprKind::FormattedValue { vec![self.expr(ExprKind::FormattedValue {
value: Box::new( value: Box::new(
parse_fstring_expr(&expression[1..expression.len() - 1]) parse_fstring_expr(&expression)
.map_err(|e| InvalidExpression(Box::new(e.error)))?, .map_err(|e| InvalidExpression(Box::new(e.error)))?,
), ),
conversion: conversion as _, conversion: conversion as _,
@ -173,9 +172,7 @@ impl FStringParser {
} else { } else {
vec![ vec![
self.expr(ExprKind::Constant { self.expr(ExprKind::Constant {
value: Constant::Str( value: Constant::Str(expression.to_owned() + "="),
expression[1..expression.len() - 1].to_owned() + "=",
),
kind: None, kind: None,
}), }),
self.expr(ExprKind::Constant { self.expr(ExprKind::Constant {
@ -184,7 +181,7 @@ impl FStringParser {
}), }),
self.expr(ExprKind::FormattedValue { self.expr(ExprKind::FormattedValue {
value: Box::new( value: Box::new(
parse_fstring_expr(&expression[1..expression.len() - 1]) parse_fstring_expr(&expression)
.map_err(|e| InvalidExpression(Box::new(e.error)))?, .map_err(|e| InvalidExpression(Box::new(e.error)))?,
), ),
conversion: (if conversion == ConversionFlag::None && spec.is_none() conversion: (if conversion == ConversionFlag::None && spec.is_none()
@ -226,7 +223,7 @@ impl FStringParser {
} }
} }
} }
Err(if expression[1..].trim().is_empty() { Err(if expression.trim().is_empty() {
EmptyExpression EmptyExpression
} else { } else {
UnclosedLbrace UnclosedLbrace