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use crate::{
build_config::BuildConfig, error::*, parser::Rule, type_engine::IntegerBits,
types::ResolvedType, CompileError, TypeInfo,
};
use sway_types::span;
use pest::iterators::Pair;
use pest::Span;
use std::{
convert::TryInto,
num::{IntErrorKind, ParseIntError},
path::PathBuf,
sync::Arc,
};
#[derive(Debug, Clone, Eq, PartialEq)]
pub enum Literal {
U8(u8),
U16(u16),
U32(u32),
U64(u64),
String(span::Span),
Boolean(bool),
Byte(u8),
B256([u8; 32]),
}
impl Literal {
#[allow(dead_code)]
pub(crate) fn as_type(&self) -> ResolvedType {
use Literal::*;
match self {
U8(_) => ResolvedType::UnsignedInteger(IntegerBits::Eight),
U16(_) => ResolvedType::UnsignedInteger(IntegerBits::Sixteen),
U32(_) => ResolvedType::UnsignedInteger(IntegerBits::ThirtyTwo),
U64(_) => ResolvedType::UnsignedInteger(IntegerBits::SixtyFour),
String(inner) => ResolvedType::Str(inner.as_str().len() as u64),
Boolean(_) => ResolvedType::Boolean,
Byte(_) => ResolvedType::Byte,
B256(_) => ResolvedType::B256,
}
}
pub(crate) fn parse_from_pair(
lit: Pair<Rule>,
config: Option<&BuildConfig>,
) -> CompileResult<(Self, span::Span)> {
let path = config.map(|c| c.path());
let lit_inner = lit.into_inner().next().unwrap();
let (parsed, span): (Result<Literal, CompileError>, _) = match lit_inner.as_rule() {
Rule::integer => {
let mut int_inner = lit_inner.into_inner().next().unwrap();
let rule = int_inner.as_rule();
if int_inner.as_rule() != Rule::basic_integer {
int_inner = int_inner.into_inner().next().unwrap()
}
let span = span::Span {
span: int_inner.as_span(),
path: path.clone(),
};
(
match rule {
Rule::u8_integer => int_inner
.as_str()
.trim()
.replace('_', "")
.parse()
.map(Literal::U8)
.map_err(|e| {
handle_parse_int_error(
e,
TypeInfo::UnsignedInteger(IntegerBits::Eight),
int_inner.as_span(),
path.clone(),
)
}),
Rule::u16_integer => int_inner
.as_str()
.trim()
.replace('_', "")
.parse()
.map(Literal::U16)
.map_err(|e| {
handle_parse_int_error(
e,
TypeInfo::UnsignedInteger(IntegerBits::Sixteen),
int_inner.as_span(),
path.clone(),
)
}),
Rule::u32_integer => int_inner
.as_str()
.trim()
.replace('_', "")
.parse()
.map(Literal::U32)
.map_err(|e| {
handle_parse_int_error(
e,
TypeInfo::UnsignedInteger(IntegerBits::ThirtyTwo),
int_inner.as_span(),
path.clone(),
)
}),
Rule::u64_integer => int_inner
.as_str()
.trim()
.replace('_', "")
.parse()
.map(Literal::U64)
.map_err(|e| {
handle_parse_int_error(
e,
TypeInfo::UnsignedInteger(IntegerBits::SixtyFour),
int_inner.as_span(),
path.clone(),
)
}),
_ => unreachable!(),
},
span,
)
}
Rule::string => {
// remove opening and closing quotes
let lit_span = lit_inner.as_span();
let lit = span::Span {
span: pest::Span::new(
lit_span.input().clone(),
lit_span.start() + 1,
lit_span.end() - 1,
)
.unwrap(),
path: path.clone(),
};
let span = span::Span {
span: lit_span,
path,
};
(Ok(Literal::String(lit)), span)
}
Rule::byte => {
let inner_byte = lit_inner.into_inner().next().unwrap();
let span = span::Span {
span: inner_byte.as_span(),
path,
};
(
match inner_byte.as_rule() {
Rule::binary_byte => parse_binary_from_pair(inner_byte, config),
Rule::hex_byte => parse_hex_from_pair(inner_byte, config),
_ => unreachable!(),
},
span,
)
}
Rule::boolean => {
let span = span::Span {
span: lit_inner.as_span(),
path,
};
(
Ok(match lit_inner.as_str() {
"true" => Literal::Boolean(true),
"false" => Literal::Boolean(false),
_ => unreachable!(),
}),
span,
)
}
a => {
eprintln!(
"not yet able to parse literal rule {:?} ({:?})",
a,
lit_inner.as_str()
);
(
Err(CompileError::UnimplementedRule(
a,
span::Span {
span: lit_inner.as_span(),
path: path.clone(),
},
)),
span::Span {
span: lit_inner.as_span(),
path,
},
)
}
};
match parsed {
Ok(lit) => ok((lit, span), Vec::new(), Vec::new()),
Err(compile_err) => err(Vec::new(), vec![compile_err]),
}
}
/// Converts a literal to a big-endian representation. This is padded to words.
pub(crate) fn to_bytes(&self) -> Vec<u8> {
use Literal::*;
match self {
U8(val) => vec![0, 0, 0, 0, 0, 0, 0, val.to_be_bytes()[0]],
U16(val) => {
let bytes = val.to_be_bytes();
vec![0, 0, 0, 0, 0, 0, bytes[0], bytes[1]]
}
U32(val) => {
let bytes = val.to_be_bytes();
vec![0, 0, 0, 0, bytes[0], bytes[1], bytes[2], bytes[3]]
}
U64(val) => val.to_be_bytes().to_vec(),
Boolean(b) => {
vec![
0,
0,
0,
0,
0,
0,
0,
if *b { 0b00000001 } else { 0b00000000 },
]
}
// assume utf8 for now
String(st) => {
let mut buf = st.as_str().to_string().into_bytes();
// pad to word alignment
while buf.len() % 8 != 0 {
buf.push(0);
}
buf
}
Byte(b) => vec![0, 0, 0, 0, 0, 0, 0, b.to_be_bytes()[0]],
B256(b) => b.to_vec(),
}
}
/// Used when creating a pointer literal value, typically during code generation for
/// values that wouldn't fit in a register.
pub(crate) fn new_pointer_literal(offset_bytes: u64) -> Literal {
Literal::U64(offset_bytes)
}
}
fn parse_hex_from_pair(
pair: Pair<Rule>,
config: Option<&BuildConfig>,
) -> Result<Literal, CompileError> {
let path = config.map(|c| c.path());
let hex = &pair.as_str()[2..]
.chars()
.filter(|x| *x != '_')
.collect::<String>();
Ok(match hex.len() {
2 => Literal::Byte(u8::from_str_radix(hex, 16).map_err(|_| {
CompileError::Internal(
"Attempted to parse hex string from invalid hex",
span::Span {
span: pair.as_span(),
path: path.clone(),
},
)
})?),
64 => {
let vec_nums: Vec<u8> = hex
.chars()
.collect::<Vec<_>>()
.chunks(2)
.map(|two_hex_digits| -> Result<u8, CompileError> {
let mut str_buf = String::new();
two_hex_digits.iter().for_each(|x| str_buf.push(*x));
u8::from_str_radix(&str_buf, 16).map_err(|_| {
CompileError::Internal(
"Attempted to parse individual byte from invalid hex string.",
span::Span {
span: pair.as_span(),
path: path.clone(),
},
)
})
})
.collect::<Result<Vec<_>, _>>()?;
let arr: [u8; 32] = vec_nums.as_slice().try_into().map_err(|_| {
CompileError::Internal(
"Attempted to parse bytes32 from hex literal of incorrect length. ",
span::Span {
span: pair.as_span(),
path: path.clone(),
},
)
})?;
Literal::B256(arr)
}
a => {
return Err(CompileError::InvalidByteLiteralLength {
span: span::Span {
span: pair.as_span(),
path,
},
byte_length: a,
})
}
})
}
fn parse_binary_from_pair(
pair: Pair<Rule>,
config: Option<&BuildConfig>,
) -> Result<Literal, CompileError> {
let path = config.map(|c| c.path());
let bin = &pair.as_str()[2..]
.chars()
.filter(|x| *x != '_')
.collect::<String>();
Ok(match bin.len() {
8 => Literal::Byte(u8::from_str_radix(bin, 2).map_err(|_| {
CompileError::Internal(
"Attempted to parse bin string from invalid bin string.",
span::Span {
span: pair.as_span(),
path: path.clone(),
},
)
})?),
256 => {
let vec_nums: Vec<u8> = bin
.chars()
.collect::<Vec<_>>()
.chunks(8)
.map(|eight_bin_digits| -> Result<u8, CompileError> {
let mut str_buf = String::new();
eight_bin_digits.iter().for_each(|x| str_buf.push(*x));
u8::from_str_radix(&str_buf, 2).map_err(|_| {
CompileError::Internal(
"Attempted to parse individual byte from invalid bin.",
span::Span {
span: pair.as_span(),
path: path.clone(),
},
)
})
})
.collect::<Result<Vec<_>, _>>()?;
let arr: [u8; 32] = vec_nums.as_slice().try_into().map_err(|_| {
CompileError::Internal(
"Attempted to parse bytes32 from bin literal of incorrect length. ",
span::Span {
span: pair.as_span(),
path: path.clone(),
},
)
})?;
Literal::B256(arr)
}
a => {
return Err(CompileError::InvalidByteLiteralLength {
span: span::Span {
span: pair.as_span(),
path,
},
byte_length: a,
})
}
})
}
#[allow(clippy::wildcard_in_or_patterns)]
fn handle_parse_int_error(
e: ParseIntError,
ty: TypeInfo,
span: Span,
path: Option<Arc<PathBuf>>,
) -> CompileError {
match e.kind() {
IntErrorKind::PosOverflow => CompileError::IntegerTooLarge {
ty: ty.friendly_type_str(),
span: span::Span { span, path },
},
IntErrorKind::NegOverflow => CompileError::IntegerTooSmall {
ty: ty.friendly_type_str(),
span: span::Span { span, path },
},
IntErrorKind::InvalidDigit => CompileError::IntegerContainsInvalidDigit {
ty: ty.friendly_type_str(),
span: span::Span { span, path },
},
IntErrorKind::Zero | IntErrorKind::Empty | _ => CompileError::Internal(
"Called incorrect internal sway-core on literal type.",
span::Span { span, path },
),
}
}