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calt: extends .case substitution on the left side up to five glyphs. Closes #57

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Rasmus Andersson 2018-08-29 07:52:47 -07:00
parent 387915558e
commit 4736bcc4f1
2 changed files with 20 additions and 6 deletions
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15
docs/lab/index.html
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@ -153,11 +153,16 @@ A*Y V*V W*W N*N X*X
Λ*Λ Σ*Σ Δ*Δ Y*Y &* Λ*Λ Σ*Σ Δ*Δ Y*Y &*
calt case should cascade: calt case should cascade:
U() U[] U{} — rightx should be rightx.case U() U[] U{} rightx should be rightx.case
()U []U {}U — special-cased as "delim' delim -> delim.case" ()U []U {}U special-cased as "delim' delim -> delim.case"
U--- — all hyphens should be hyphen.case ---U--- all hyphens should be hyphen.case
---U — only the hyphen next to U should be hyphen.case U-→(){}[]* all should be .case
U-→(){}[]*
left side cascades up to 5 characters:
******ABBA******
------M------
@@@@@@M@@@@@@
++++++M++++++
`) `)
// From http://justanotherfoundry.com/generator // From http://justanotherfoundry.com/generator

11
src/features.fea
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@ -715,9 +715,18 @@ feature calt {
@UC = [ @UC_ROMAN @UC_SET1 exclam question ]; @UC = [ @UC_ROMAN @UC_SET1 exclam question ];
@LC = [ @LC_ROMAN @LC_SET1 ]; @LC = [ @LC_ROMAN @LC_SET1 ];
# rules to support left-hand repetition of CASE{L}->{R} [issue #57]
# y' y y y Z -> x y y y Z
sub @CASE_L' @CASE_L @CASE_L @CASE_L @CASE_L @UC by @CASE_R;
# y' y y y Z -> x y y y Z
sub @CASE_L' @CASE_L @CASE_L @CASE_L @UC by @CASE_R;
# y' y y Z -> x y y Z
sub @CASE_L' @CASE_L @CASE_L @UC by @CASE_R;
# y' y Z -> x y Z
sub @CASE_L' @CASE_L @UC by @CASE_R;
sub [ @UC @CASE_R ] @CASE_L' by @CASE_R; sub [ @UC @CASE_R ] @CASE_L' by @CASE_R;
ignore sub @LC @CASE_NONDELIM_L' @UC; ignore sub @LC @CASE_NONDELIM_L' @UC;
sub @CASE_L' [ @CASE_R @UC ] by @CASE_R;
sub @CASE_DELIM_L' @CASE_DELIM_L [ @CASE_R @UC ] by @CASE_DELIM_R; sub @CASE_DELIM_L' @CASE_DELIM_L [ @CASE_R @UC ] by @CASE_DELIM_R;