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lang: parse pipelines
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parent
30f17773a8
commit
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@ -5,44 +5,7 @@ use self::{collection::collection, instruction::instr, lit::literal, pipeline::P
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mod collection;
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mod instruction;
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mod lit;
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mod pipeline {
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use enumset::enum_set;
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use crate::lst_parser::{
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error::SyntaxError,
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syntax_kind::{SyntaxKind::*, TokenSet},
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CompletedMarker, Parser,
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};
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use super::expression;
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pub fn pipeline(p: &mut Parser, start_expr: CompletedMarker) -> Option<CompletedMarker> {
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if !pipe(p) {
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return Some(start_expr);
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}
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let pipeline_marker = start_expr.precede(p, "pipeline_start");
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loop {
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if expression(p, true).is_none() {
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return Some(pipeline_marker.complete_err(p, SyntaxError::PipelineNeedsSink));
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}
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if !pipe(p) {
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return Some(pipeline_marker.complete(p, PIPELINE));
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}
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}
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}
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pub const PIPES: TokenSet = enum_set!(PIPE | MAPPING_PIPE | NULL_PIPE);
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fn pipe(p: &mut Parser) -> bool {
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if PIPES.contains(p.current()) {
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p.do_bump();
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true
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} else {
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false
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}
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}
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}
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mod pipeline;
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pub fn expression(p: &mut Parser, in_pipe: bool) -> Option<CompletedMarker> {
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let expr = p.start("expr");
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36
crates/lang/src/lst_parser/grammar/expression/pipeline.rs
Normal file
36
crates/lang/src/lst_parser/grammar/expression/pipeline.rs
Normal file
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@ -0,0 +1,36 @@
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use enumset::enum_set;
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use crate::lst_parser::{
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error::SyntaxError,
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syntax_kind::{SyntaxKind::*, TokenSet},
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CompletedMarker, Parser,
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};
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use super::expression;
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pub fn pipeline(p: &mut Parser, start_expr: CompletedMarker) -> Option<CompletedMarker> {
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if !pipe(p) {
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return Some(start_expr);
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}
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let pipeline_marker = start_expr.precede(p, "pipeline_start");
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loop {
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if expression(p, true).is_none() {
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return Some(pipeline_marker.complete_err(p, SyntaxError::PipelineNeedsSink));
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}
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if !pipe(p) {
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return Some(pipeline_marker.complete(p, PIPELINE));
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}
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}
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}
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pub const PIPES: TokenSet = enum_set!(PIPE | MAPPING_PIPE | NULL_PIPE);
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fn pipe(p: &mut Parser) -> bool {
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if PIPES.contains(p.current()) {
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p.do_bump();
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true
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} else {
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false
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}
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}
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@ -19,10 +19,21 @@ pub fn lex(src: &str) -> Vec<(SyntaxKind, &str)> {
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pub enum SyntaxKind {
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#[token("def")]
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DEF_KW = 0,
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DEF,
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DEF_NAME,
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DEF_BODY,
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#[token("let")]
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LET_KW,
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#[token("in")]
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IN_KW,
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LET_IN,
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#[token("mod")]
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MOD_KW,
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MODULE,
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MODULE_BODY,
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#[token("use")]
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USE_KW,
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USE_PAT,
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#[regex("[\\d]+")]
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INT_NUM,
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#[regex("[+-]?([\\d]+\\.[\\d]*|[\\d]*\\.[\\d]+)")]
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