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Add support for math-like externals (#4606)

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This commit is contained in:
JT
2022-02-22 10:55:28 -05:00
committed by GitHub
parent d054a724d1
commit 25712760ba
7 changed files with 63 additions and 4 deletions
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24
crates/nu-parser/src/parser.rs
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@ -41,7 +41,13 @@ fn is_identifier_byte(b: u8) -> bool {
b != b'.' && b != b'[' && b != b'(' && b != b'{'
}
fn is_math_expression_byte(b: u8) -> bool {
pub fn is_math_expression_like(bytes: &[u8]) -> bool {
if bytes.is_empty() {
return false;
}
let b = bytes[0];
b == b'0'
|| b == b'1'
|| b == b'2'
@ -826,7 +832,13 @@ pub fn parse_call(
// Find the longest group of words that could form a command
let bytes = working_set.get_span_contents(*word_span);
if is_math_expression_byte(bytes[0]) {
if is_math_expression_like(bytes)
&& !working_set
.permanent_state
.external_exceptions
.iter()
.any(|x| x == bytes)
{
break;
}
@ -3446,7 +3458,13 @@ pub fn parse_expression(
let bytes = working_set.get_span_contents(spans[pos]);
let (output, err) = if is_math_expression_byte(bytes[0]) {
let (output, err) = if is_math_expression_like(bytes)
&& !working_set
.permanent_state
.external_exceptions
.iter()
.any(|x| x == bytes)
{
parse_math_expression(working_set, &spans[pos..], None)
} else {
// For now, check for special parses of certain keywords