pub struct Parser { /* private fields */ }
Implementations§
source§impl Parser
impl Parser
pub fn new(input: &str) -> Self
sourcepub fn parse_stmt_assert(&mut self) -> Result<Term>
pub fn parse_stmt_assert(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 121)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_assign(&mut self) -> Result<Term>
pub fn parse_stmt_assign(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 129)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_fail(&mut self) -> Result<Term>
pub fn parse_stmt_fail(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 122)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_stop(&mut self) -> Result<Term>
pub fn parse_stmt_stop(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 123)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_goto(&mut self) -> Result<Term>
pub fn parse_stmt_goto(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 124)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_if(&mut self) -> Result<Term>
pub fn parse_stmt_if(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 125)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_label(&mut self) -> Result<Term>
pub fn parse_stmt_label(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 126)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_revert(&mut self) -> Result<Term>
pub fn parse_stmt_revert(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 127)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_stmt_succeed(&mut self) -> Result<Term>
pub fn parse_stmt_succeed(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 128)
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fn parse_stmt(&mut self) -> Result<Term> {
// Skip any leading whitespace
self.skip_whitespace();
// Dispatch on lookahead
match self.lexer.peek().kind {
Token::Assert => self.parse_stmt_assert(),
Token::Fail => self.parse_stmt_fail(),
Token::Stop => self.parse_stmt_stop(),
Token::Goto => self.parse_stmt_goto(),
Token::If => self.parse_stmt_if(),
Token::Dot => self.parse_stmt_label(),
Token::Revert => self.parse_stmt_revert(),
Token::Succeed => self.parse_stmt_succeed(),
_ => self.parse_stmt_assign()
}
}
sourcepub fn parse_expr(&mut self) -> Result<Term>
pub fn parse_expr(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 135)
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pub fn parse_stmt_assert(&mut self) -> Result<Term> {
self.lexer.snap(Token::Assert)?;
let expr = self.parse_expr()?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Assert(Box::new(expr)))
}
pub fn parse_stmt_assign(&mut self) -> Result<Term> {
let lhs = self.parse_expr()?;
self.skip_whitespace();
self.lexer.snap(Token::Equals)?;
let rhs = self.parse_expr()?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Assignment(Box::new(lhs),Box::new(rhs)))
}
pub fn parse_stmt_fail(&mut self) -> Result<Term> {
self.lexer.snap(Token::Fail)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Fail)
}
pub fn parse_stmt_stop(&mut self) -> Result<Term> {
self.lexer.snap(Token::Stop)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Stop)
}
pub fn parse_stmt_goto(&mut self) -> Result<Term> {
self.lexer.snap(Token::Goto)?;
self.skip_whitespace();
let target = self.lexer.snap(Token::Identifier)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Goto(self.lexer.get_str(target)))
}
pub fn parse_stmt_if(&mut self) -> Result<Term> {
self.lexer.snap(Token::If)?;
let expr = self.parse_expr()?;
self.skip_whitespace();
self.lexer.snap(Token::Goto)?;
self.skip_whitespace();
let target = self.lexer.snap(Token::Identifier)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::IfGoto(Box::new(expr),self.lexer.get_str(target)))
}
pub fn parse_stmt_label(&mut self) -> Result<Term> {
self.lexer.snap(Token::Dot)?;
let target = self.lexer.snap(Token::Identifier)?;
Ok(Term::Label(self.lexer.get_str(target)))
}
pub fn parse_stmt_revert(&mut self) -> Result<Term> {
self.lexer.snap(Token::Revert)?;
let exprs = self.parse_expr_list(Token::SemiColon)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Revert(exprs))
}
pub fn parse_stmt_succeed(&mut self) -> Result<Term> {
self.lexer.snap(Token::Succeed)?;
let exprs = self.parse_expr_list(Token::SemiColon)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Succeed(exprs))
}
// =========================================================================
// Expressions
// =========================================================================
pub fn parse_expr(&mut self) -> Result<Term> {
self.parse_expr_binary(3)
}
/// Parse a binary expression at a given _level_. Higher levels
/// indicate expressions which bind _less tightly_. Furthermore,
/// level `0` corresponds simply to parsing a unary expression.
pub fn parse_expr_binary(&mut self, level: usize) -> Result<Term> {
if level == 0 {
self.parse_expr_postfix()
} else {
let tokens = BINARY_CONNECTIVES[level-1];
// Parse level below
let lhs = self.parse_expr_binary(level-1)?;
// Skip remaining whitespace (on this line)
self.skip_whitespace();
// Check whether logical connective follows
let lookahead = self.lexer.snap_any(tokens);
//
match lookahead {
Ok(s) => {
// FIXME: turn this into a loop?
let rhs = self.parse_expr_binary(level)?;
let bop = Self::binop_from_token(s.kind).unwrap();
Ok(Term::Binary(bop,Box::new(lhs),Box::new(rhs)))
}
Err(_) => {
Ok(lhs)
}
}
}
}
pub fn parse_expr_postfix(&mut self) -> Result<Term> {
let mut expr = self.parse_expr_term()?;
// Check for postfix unary operator.
let lookahead = self.lexer.peek();
// FIXME: managed nested operators
expr = match lookahead.kind {
Token::LeftSquare => self.parse_expr_arrayaccess(expr)?,
//TokenType::LeftBrace => self.parse_expr_invoke(expr)?,
_ => expr
};
// Done
Ok(expr)
}
pub fn parse_expr_arrayaccess(&mut self, src: Term) -> Result<Term> {
self.lexer.snap(Token::LeftSquare)?;
let index = self.parse_expr()?;
self.lexer.snap(Token::RightSquare)?;
let expr = Term::ArrayAccess(Box::new(src),Box::new(index));
// Done
Ok(expr)
}
pub fn parse_expr_term(&mut self) -> Result<Term> {
// Skip whitespace
self.skip_whitespace();
//
let lookahead = self.lexer.peek();
//
let expr = match lookahead.kind {
Token::Integer => self.parse_literal_int()?,
Token::Hex => self.parse_literal_hex()?,
Token::Identifier => self.parse_variable_access()?,
Token::LeftBrace => self.parse_expr_bracketed()?,
_ => {
return Err(Error::new(lookahead,ErrorCode::UnexpectedToken));
}
};
// Done
Ok(expr)
}
pub fn parse_literal_int(&mut self) -> Result<Term> {
let tok = self.lexer.snap(Token::Integer)?;
// Extract characters making up literal
let chars = self.lexer.get_str(tok);
// Convert characters into digits
let digits = chars.chars().map(|c| c.to_digit(10).unwrap() as u8).collect();
// All good!
Ok(Term::Int(digits))
}
pub fn parse_literal_hex(&mut self) -> Result<Term> {
let tok = self.lexer.snap(Token::Hex)?;
// Extract characters making up literal
let chars = &self.lexer.get_str(tok)[2..];
// Convert characters into digits
let digits = chars.chars().map(|c| c.to_digit(16).unwrap() as u8).collect();
// All good!
Ok(Term::Hex(digits))
}
pub fn parse_variable_access(&mut self) -> Result<Term> {
let tok = self.lexer.snap(Token::Identifier)?;
// Extract characters making up literal
let chars = self.lexer.get_str(tok);
// Match built-ins
let expr = match chars.as_str() {
"memory" => Term::MemoryAccess(Region::Memory),
"storage" => Term::MemoryAccess(Region::Storage),
"calldata" => Term::MemoryAccess(Region::CallData),
_ => {
return Err(Error::new(tok,ErrorCode::UnexpectedToken));
}
};
//
Ok(expr)
}
pub fn parse_expr_bracketed(&mut self) -> Result<Term> {
self.lexer.snap(Token::LeftBrace)?;
let expr = self.parse_expr();
self.lexer.snap(Token::RightBrace)?;
expr
}
/// Parse a sequence of expression separated by a comma.
pub fn parse_expr_list(&mut self, terminator: Token) -> Result<Vec<Term>> {
let mut exprs = Vec::new();
while !self.lexer.is_eof() && self.lexer.peek().kind != terminator {
if exprs.len() > 0 {
self.skip_whitespace();
self.lexer.snap(Token::Comma)?;
}
exprs.push(self.parse_expr()?);
}
// Done
Ok(exprs)
}
sourcepub fn parse_expr_binary(&mut self, level: usize) -> Result<Term>
pub fn parse_expr_binary(&mut self, level: usize) -> Result<Term>
Parse a binary expression at a given level. Higher levels
indicate expressions which bind less tightly. Furthermore,
level 0
corresponds simply to parsing a unary expression.
Examples found in repository?
src/parser.rs (line 205)
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pub fn parse_expr(&mut self) -> Result<Term> {
self.parse_expr_binary(3)
}
/// Parse a binary expression at a given _level_. Higher levels
/// indicate expressions which bind _less tightly_. Furthermore,
/// level `0` corresponds simply to parsing a unary expression.
pub fn parse_expr_binary(&mut self, level: usize) -> Result<Term> {
if level == 0 {
self.parse_expr_postfix()
} else {
let tokens = BINARY_CONNECTIVES[level-1];
// Parse level below
let lhs = self.parse_expr_binary(level-1)?;
// Skip remaining whitespace (on this line)
self.skip_whitespace();
// Check whether logical connective follows
let lookahead = self.lexer.snap_any(tokens);
//
match lookahead {
Ok(s) => {
// FIXME: turn this into a loop?
let rhs = self.parse_expr_binary(level)?;
let bop = Self::binop_from_token(s.kind).unwrap();
Ok(Term::Binary(bop,Box::new(lhs),Box::new(rhs)))
}
Err(_) => {
Ok(lhs)
}
}
}
}
sourcepub fn parse_expr_postfix(&mut self) -> Result<Term>
pub fn parse_expr_postfix(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 213)
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pub fn parse_expr_binary(&mut self, level: usize) -> Result<Term> {
if level == 0 {
self.parse_expr_postfix()
} else {
let tokens = BINARY_CONNECTIVES[level-1];
// Parse level below
let lhs = self.parse_expr_binary(level-1)?;
// Skip remaining whitespace (on this line)
self.skip_whitespace();
// Check whether logical connective follows
let lookahead = self.lexer.snap_any(tokens);
//
match lookahead {
Ok(s) => {
// FIXME: turn this into a loop?
let rhs = self.parse_expr_binary(level)?;
let bop = Self::binop_from_token(s.kind).unwrap();
Ok(Term::Binary(bop,Box::new(lhs),Box::new(rhs)))
}
Err(_) => {
Ok(lhs)
}
}
}
}
sourcepub fn parse_expr_arrayaccess(&mut self, src: Term) -> Result<Term>
pub fn parse_expr_arrayaccess(&mut self, src: Term) -> Result<Term>
Examples found in repository?
src/parser.rs (line 243)
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pub fn parse_expr_postfix(&mut self) -> Result<Term> {
let mut expr = self.parse_expr_term()?;
// Check for postfix unary operator.
let lookahead = self.lexer.peek();
// FIXME: managed nested operators
expr = match lookahead.kind {
Token::LeftSquare => self.parse_expr_arrayaccess(expr)?,
//TokenType::LeftBrace => self.parse_expr_invoke(expr)?,
_ => expr
};
// Done
Ok(expr)
}
sourcepub fn parse_expr_term(&mut self) -> Result<Term>
pub fn parse_expr_term(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 238)
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pub fn parse_expr_postfix(&mut self) -> Result<Term> {
let mut expr = self.parse_expr_term()?;
// Check for postfix unary operator.
let lookahead = self.lexer.peek();
// FIXME: managed nested operators
expr = match lookahead.kind {
Token::LeftSquare => self.parse_expr_arrayaccess(expr)?,
//TokenType::LeftBrace => self.parse_expr_invoke(expr)?,
_ => expr
};
// Done
Ok(expr)
}
sourcepub fn parse_literal_int(&mut self) -> Result<Term>
pub fn parse_literal_int(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 267)
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pub fn parse_expr_term(&mut self) -> Result<Term> {
// Skip whitespace
self.skip_whitespace();
//
let lookahead = self.lexer.peek();
//
let expr = match lookahead.kind {
Token::Integer => self.parse_literal_int()?,
Token::Hex => self.parse_literal_hex()?,
Token::Identifier => self.parse_variable_access()?,
Token::LeftBrace => self.parse_expr_bracketed()?,
_ => {
return Err(Error::new(lookahead,ErrorCode::UnexpectedToken));
}
};
// Done
Ok(expr)
}
sourcepub fn parse_literal_hex(&mut self) -> Result<Term>
pub fn parse_literal_hex(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 268)
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pub fn parse_expr_term(&mut self) -> Result<Term> {
// Skip whitespace
self.skip_whitespace();
//
let lookahead = self.lexer.peek();
//
let expr = match lookahead.kind {
Token::Integer => self.parse_literal_int()?,
Token::Hex => self.parse_literal_hex()?,
Token::Identifier => self.parse_variable_access()?,
Token::LeftBrace => self.parse_expr_bracketed()?,
_ => {
return Err(Error::new(lookahead,ErrorCode::UnexpectedToken));
}
};
// Done
Ok(expr)
}
sourcepub fn parse_variable_access(&mut self) -> Result<Term>
pub fn parse_variable_access(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 269)
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pub fn parse_expr_term(&mut self) -> Result<Term> {
// Skip whitespace
self.skip_whitespace();
//
let lookahead = self.lexer.peek();
//
let expr = match lookahead.kind {
Token::Integer => self.parse_literal_int()?,
Token::Hex => self.parse_literal_hex()?,
Token::Identifier => self.parse_variable_access()?,
Token::LeftBrace => self.parse_expr_bracketed()?,
_ => {
return Err(Error::new(lookahead,ErrorCode::UnexpectedToken));
}
};
// Done
Ok(expr)
}
sourcepub fn parse_expr_bracketed(&mut self) -> Result<Term>
pub fn parse_expr_bracketed(&mut self) -> Result<Term>
Examples found in repository?
src/parser.rs (line 270)
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pub fn parse_expr_term(&mut self) -> Result<Term> {
// Skip whitespace
self.skip_whitespace();
//
let lookahead = self.lexer.peek();
//
let expr = match lookahead.kind {
Token::Integer => self.parse_literal_int()?,
Token::Hex => self.parse_literal_hex()?,
Token::Identifier => self.parse_variable_access()?,
Token::LeftBrace => self.parse_expr_bracketed()?,
_ => {
return Err(Error::new(lookahead,ErrorCode::UnexpectedToken));
}
};
// Done
Ok(expr)
}
sourcepub fn parse_expr_list(&mut self, terminator: Token) -> Result<Vec<Term>>
pub fn parse_expr_list(&mut self, terminator: Token) -> Result<Vec<Term>>
Parse a sequence of expression separated by a comma.
Examples found in repository?
src/parser.rs (line 188)
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pub fn parse_stmt_revert(&mut self) -> Result<Term> {
self.lexer.snap(Token::Revert)?;
let exprs = self.parse_expr_list(Token::SemiColon)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Revert(exprs))
}
pub fn parse_stmt_succeed(&mut self) -> Result<Term> {
self.lexer.snap(Token::Succeed)?;
let exprs = self.parse_expr_list(Token::SemiColon)?;
self.lexer.snap(Token::SemiColon)?;
Ok(Term::Succeed(exprs))
}