113 lines
3.1 KiB
Rust
113 lines
3.1 KiB
Rust
use crate::sql::comment::comment;
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use crate::sql::comment::{mightbespace, shouldbespace};
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use crate::sql::error::IResult;
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use crate::sql::operator::{assigner, binary};
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use nom::branch::alt;
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use nom::bytes::complete::tag;
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use nom::bytes::complete::tag_no_case;
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use nom::character::complete::char;
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use nom::character::complete::multispace1;
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use nom::combinator::peek;
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use nom::combinator::{eof, value};
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use nom::sequence::preceded;
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pub fn number(i: &str) -> IResult<&str, ()> {
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peek(alt((
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value((), multispace1), // 1 + 1
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value((), binary), // 1+1
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value((), assigner), // 1=1
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value((), comment), // 1/*comment*/
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value((), char(')')), // (1)
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value((), char(']')), // a[1]
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value((), char('}')), // {k: 1}
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value((), char('"')),
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value((), char('\'')),
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value((), char(';')), // SET a = 1;
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value((), char(',')), // [1, 2]
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value((), tag("..")), // thing:1..2
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value((), eof), // SET a = 1
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)))(i)
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}
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pub fn ident(i: &str) -> IResult<&str, ()> {
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peek(alt((
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value((), multispace1), // a + 1
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value((), binary), // a+1
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value((), assigner), // a+=1
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value((), comment), // a/*comment*/
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value((), char(')')), // (a)
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value((), char(']')), // foo[a]
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value((), char('}')), // {k: a}
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value((), char(';')), // SET k = a;
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value((), char(',')), // [a, b]
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value((), char('.')), // a.k
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value((), char('…')), // a…
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value((), char('[')), // a[0]
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value((), eof), // SET k = a
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)))(i)
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}
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/// none, false, etc.
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pub fn keyword(i: &str) -> IResult<&str, ()> {
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peek(alt((
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value((), multispace1), // false || true
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value((), binary), // false||true
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value((), comment), // false/*comment*/
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value((), char(')')), // (false)
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value((), char(']')), // [WHERE k = false]
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value((), char('}')), // {k: false}
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value((), char(';')), // SET a = false;
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value((), char(',')), // [false, true]
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value((), eof), // SET a = false
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)))(i)
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}
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pub fn duration(i: &str) -> IResult<&str, ()> {
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peek(alt((
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value((), multispace1),
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value((), binary),
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value((), assigner),
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value((), comment),
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value((), char(')')),
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value((), char(']')),
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value((), char('}')),
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value((), char(';')),
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value((), char(',')),
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value((), char('.')),
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value((), eof),
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)))(i)
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}
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pub fn field(i: &str) -> IResult<&str, ()> {
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peek(alt((
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value((), preceded(shouldbespace, tag_no_case("FROM"))),
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value((), char(';')),
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value((), eof),
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)))(i)
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}
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pub fn subquery(i: &str) -> IResult<&str, ()> {
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alt((
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|i| {
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let (i, _) = mightbespace(i)?;
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let (i, _) = char(';')(i)?;
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let (i, _) = peek(alt((
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preceded(shouldbespace, tag_no_case("THEN")),
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preceded(shouldbespace, tag_no_case("ELSE")),
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preceded(shouldbespace, tag_no_case("END")),
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)))(i)?;
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Ok((i, ()))
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},
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peek(alt((
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value((), preceded(shouldbespace, tag_no_case("THEN"))),
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value((), preceded(shouldbespace, tag_no_case("ELSE"))),
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value((), preceded(shouldbespace, tag_no_case("END"))),
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value((), comment),
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value((), char(']')),
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value((), char('}')),
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value((), char(';')),
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value((), char(',')),
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value((), eof),
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))),
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))(i)
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}
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