nexoniarz/Finch
Watch
1
0
Fork
You've already forked Finch
 0
mirror of https://github.com/Nexoniarz/Finch.git synced 2026-11-03 16:54:25 +00:00
Code Issues Projects Releases Packages Wiki Activity

Struct defaults apply inside structs; exit() ends an or-block; 1e9 literals; x * 2.0 stays f32; floats print as the shortest exact text; str(x, digits)

Browse source 
Also frees main's args and the message of a failing main (valgrind was not clean on two tests).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Nexoniarz 2026-10-29 09:14:58 +01:00
commit 6142e47e71
10 changed files with 207 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

22
src/lexer.fch
View file

@ -144,6 +144,8 @@ fn lex(str src, str path) -> []Token {
}
} else if isDigit(c) {
t.kind = "int"
mant := ""
expStart := 0
if c == '0' && (peek(lx, 1) == 'x' || peek(lx, 1) == 'X') {
advance(lx)
advance(lx)
@ -161,8 +163,28 @@ fn lex(str src, str path) -> []Token {
advance(lx)
}
}
// an exponent: 1e9, 2.5e-3
e := peek(lx, 0)
sign := peek(lx, 1) == '+' || peek(lx, 1) == '-'
if (e == 'e' || e == 'E') && (isDigit(peek(lx, 1)) || (sign && isDigit(peek(lx, 2)))) {
if t.kind == "int" {
t.kind = "float"
mant = lx.src.sub(start, lx.i) + ".0"
}
expStart = lx.i
advance(lx)
if sign {
advance(lx)
}
while lx.i < lx.src.len && isDigit(lx.src[lx.i]) {
advance(lx)
}
}
}
t.text = lx.src.sub(start, lx.i).replace("_", "")
if mant.len > 0 {
t.text = (mant + lx.src.sub(expStart, lx.i)).replace("_", "") // LLVM wants the '.'
}
} else if c == '"' || c == '\'' {
quote := c
t.kind = "string"